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1

Structure-performance engineering of recycled acrylic membranes for air gap membrane distillation

Mohammed Safa, Waisi Basma

Ecological Chemistry and Engineering. S

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2026

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Vol. 33, nr 1

63--79

EN

Air Gap Membrane Distillation (AGMD) is an emerging and promising technology in separation processes, but its industrial adoption is limited by relatively low permeate flux. Conventional AGMD systems typically utilise thin film-cast polymeric membranes. However, electrospun nanofibrous membranes have become more popular since they possess a highly interconnected porous structure, which is able to increase mass transfer performance and availability. In this study, recycled acrylic (RA) waste powder was used to prepare a precursor solution to fabricate two types of membranes: thin film-cast membranes and electrospun nonwoven nanofibrous membranes to be evaluated in the AGMD process for water desalination application. The fabricated RA-based membranes underwent characterisation by scanning electronic microscopy (SEM), mechanical properties, water contact angle (WCA), and Fourier transform infrared spectroscopy (FTIR). Based on the results obtained, the nanofiber membrane exhibited a higher contact angle, porosity, and elasticity than the thin film cast membrane. RA-based membranes were tested in the AGMD system at different feed temperatures (45 °C, 55 °C, and 65 °C). The electrospun nanofibrous membrane performed better than the thin-film cast membrane in both permeate flux and salt rejection. The temperature of the feed increased correspondingly with the flux of permeate as well as the salt rejection. The cast membrane of thin film attained a flux of permeate of 1.48 kg/(m2‧h) with 99.98 % salt rejection. Conversely, the electrospun nanofibrous membrane had better performance with a significantly higher permeate flux rate of 7.69 kg/(m2‧h) and an almost ideal salt rejection of 99.99 %.

2

Elektroprzędzone nanowłókna polimerowe – otrzymywanie i możliwości zastosowania

Zdubek Anna, Maliszewska Irena, Kołodziej Natalia, Czapka Tomasz

Chemik

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2025

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Nr 1

53--62

PL

Wodne roztwory alkoholu poliwinylowego (PAV) (6–12%) o masach cząsteczkowych 40, 130 i 205 kDa poddano przędzeniu w celu określenia wpływu takich parametrów procesu jak masa cząsteczkowa polimeru, stężenie roztworu polimeru, napięcie elektroprzędzenia i szybkość przepływu polimeru na grubość i jakość otrzymanego nanowłókna oraz na efektywność (ciągłość) procesu przędzenia. Badaniom poddano także 10-proc. roztwory PAV zawierające 0,1, 0,2 lub 03% AgNO3 w celu otrzymania włókniny o potencjalnym działaniu bakteriobójczym wobec trzech różnych szczepów bakteryjnych: Bacillus subtilis, Staphylococcus aureus oraz Acinetobacter baumannie. Najbardziej efektywne hamowanie rozwoju bakterii przez otrzymane materiały zaobserwowano w przypadku S. aureus i A. baumannii, które są znanymi patogenami z grupy „ESCAPE”, czyli takimi, które nie poddają się klasycznej antybiotykoterapii.

EN

Aq. solns. of polyvinyl alc. (PAV) (6–12%) with mol. weights of 40, 130 and 205 kDa were electrospun to det. the effect of such process parameters as polymer mol. weight, polymer soln. concn., electrospinning voltage and polymer flow rate on the thickness and qual. of the obtained nanofibre and on the efficiency (continuity) of the electrospinning process. 10% PAV solns. contg. 0.1, 0.2 or 0.3% AgNO3 were also tested to obtain a nonwoven fabric with potential bactericidal activity against three different bacterial strains: Bacillus subtilis, Staphylococcus aureus and Acinetobacter baumannie. The most effective inhibition of bacterial growth by the obtained materials was obsd. in the case of S. aureus and A. baumannii, which are known pathogens from the “ESCAPE” group, i.e. those that are not subject to classical antibiotic therapy.

3

Electrospun openwork structures for applications in environmental engineering

Borowczak Maciej, Sobczyk Karolina, Leluk Karol

Polimery

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2024

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Vol. 69, nr 6

350--356

EN

The article presents the possibilities of producing fibrous structures using electrospinning from polymer solutions based on PBS and a binary solvent system. The main component of the system was chloroform. Dimethyl sulfoxide (DMSO) or N,N-dimethylformamide (DMF) was used as an additional solvent to increase the boiling point of the system. The influence of process parameters on the structure of the obtained fibers was described. The results were compared with those obtained using the extrusion blow molding method. The developed fibers will be used in air filtration processes.

PL

W artykule przedstawiono możliwości wytwarzania struktur włóknistych techniką elektroprzędzenia z roztworów polimerowych na bazie PBS i binarnego układu rozpuszczalników. Głównym składnikiem układu był chloroform. Sulfotlenek dimetylu (DMSO) lub N,N-dimetyloformamid (DMF) stosowano jako dodatkowy rozpuszczalnik w celu zwiększenia temperatury wrzenia układu. Opisano wpływ parametrów procesu na strukturę otrzymanych włókien. Wyniki porównano z wynikami uzyskanymi metodą wytłaczania z rozdmuchiwaniem. Opracowane włókna znajdą zastosowanie w procesach filtracji powietrza.

4

Biocompatibility of electrospun PVA-based nanocomposite with chemical vapor deposition-derived graphene monolayer

Sasmazel Hilal Turkoglu, Alazzawi Marwa, Sadhu Verra, Gozutok Melike

Polimery

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2024

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Vol. 69, nr 11-12

657--667

EN

The biocompatibility of electrospun PVA with monolayer graphene obtained by chemical vapor deposition (PVA/CVD-grown MLG) nanocomposite was investigated. The properties of PVA/ CVD-grown MLG nanocomposite were compared with those of electrospun PVA mat. Raman analysis confirmed the presence of graphene monolayer on PVA. Although no significant changes in tensile properties were observed, the electrical conductivity increased from 0.1 (PVA mat) to 0.4 μS/cm (PVA/ CVD-grown MLG). Thermal stability was also increased, as evidenced by the higher onset temperature and temperature of maximum decomposition rate determined by TGA. The contact angle decreased slightly, which resulted in higher PBS absorption and degradation of the nanocomposite. Water vapor transmission rate (WVTR) decreased from 40 (PVA mat) to 37 g/m2 h (PVA/CVD-grown MLG). Cell culture studies showed better cell viability, population, and growth in the case of PVA/CVD-grown MLG nanocomposite due to improved physical, chemical and mechanical properties.

PL

Zbadano biokompatybilność nanokompozytu elektroprzędzonego PVA i monowarstwowego grafenu otrzymanego metodą chemicznego osadzania z fazy gazowej. Właściwości nanokompozytu porównano z właściwościami elektroprzedzonej maty PVA. Analiza Ramana potwierdziła obecność monowarstwy grafenu na PVA. Pomimo, że nie stwierdzono istotnych zmian właściwości mechanicznych przy rozciąganiu, to przewodnictwo elektryczne wzrosło z 0,1 (mata PVA) do 0,4 μS/cm (nanokompozyt). Zwiększyła się również stabilność termiczna, o czym świadczy wyższa temperatura początku rozkładu i maksymalnej szybkości rozkładu oznaczona metodą TGA. Nieznacznie zmniejszył się kąt zwilżania, co skutkowało większą absorpcją PBS i degradacją nanokompozytu. WVTR zmniejszył się z 40 (mata PVA) do 37 g/m2•h (nanokompozyt). Ponadto ze względu na lepsze właściwości fizyczne, chemiczne i mechaniczne nanokompozytu uzyskano większą żywotność, populację i wzrost komórek.

5

Electrospun carbon nanofibers (CNFs) modified with needle-like SiC nanostructures

Pazdyk-Słaby Weronika, Długoń Elżbieta, Zientara Dariusz, Fraczek-Szczypta Aneta

Chemical and Process Engineering : New Frontiers

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2024

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Vol. 45, nr 3

art. no. e74

EN

Electrospun carbon nanofibers (CNFs) are an excellent material which can possess a wide range of properties through controlling the parameters of the electrospinning process, as well as through thermal treatment. At the same time, CNFs are an excellent substrate for carrying out modifications, both volumetric, at the stage of precursor preparation, and surface modifications. Different methods of introducing various silicon carbide (SiC) precursors into the spinning solution enables the formation of needleshaped SiC nanostructures on the CNF surface. This work presents an attempt to obtain nanofibrous carbon materials modified in volume and on the surface with SiC precursors, along with their characteristics. The most promising method of creating needle-like SiC nanostructures on the surface of CNFs is the use of volume modification with polysiloxane and silanization of the surface of the CNFs in a organosilicon sol solution.

6

Study of morphology and optical properties of novel Se-doped SnO2 1D nanostructures prepared by electrospinning

Smok W.

Archives of Materials Science and Engineering

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2024

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Vol. 129, nr 2

60--66

EN

Purpose: The paper aimed to manufacture novel SnO2:Se4+ nanostructures using a two-step electrospinning method followed by calcination at 500°C and to investigate its morphology, structure, chemical composition and optical properties. Design/methodology/approach: Nanostructures prepared by electrospinning and calcination were analysed for morphology and structure using scanning and transmission electron microscopy. The chemical and phase composition of the obtained nanomaterials was analysed using X-ray diffraction and the following spectroscopic methods: X-ray photoelectron spectroscopy and energy-dispersive X-ray spectroscopy. The UV-Vis spectrophotometer allowed us to analyse the range of electromagnetic radiation absorbed by the nanowires SnO2:Se4+ and determine their optical band gap. Findings: The electrospinning method followed by calcination successfully produced impurity-free, homogeneous, polycrystalline one-dimensional SnO2 nanostructures doped with Se4+ with an average diameter of 140 nm. Analysis of the optical properties of the manufactured nanostructures showed that their maximum absorption is in the middle and near-ultraviolet. The fabricated SnO2:Se4+ nanowires were characterized by a much lower optical band gap than undoped nanowires, increasing their application potential. Research limitations/implications: The work is a basis for further research on the effect of doping SnO2 nanostructures with nonmetal ions, in which, in the future, special attention should be paid to the influence of the manufacturing process parameters on the structure, morphology and optical and electrical properties of nanostructures. Practical implications: The favourable optical properties of spun SnO2:Se4+ nanowires give them great application potential in photocatalysis and the construction of modern photovoltaic cells and optoelectronic devices. Originality/value: In the given work, for the first time, a method of manufacturing Se4+-doped SnO2 nanowires using the electrospinning method followed by calcination was presented, and their morphology, structure, and optical properties were characterized. The presented study may provide valuable knowledge for the further development of semiconductor nanomaterials, which play a key role in developing fields such as gas sensing, communication, and renewable energy.

7

Electrospun niobium oxide 1D nanostructures and their applications in textile industry wastewater treatment

Zaborowska Marta, Smok Weronika, Tański Tomasz

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2023

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Vol. 71, nr 2

art. no. e144941

EN

Textile industry emits daily huge amounts of sewage rich in non-biodegradable organic compounds, especially in textile dyes. Such contaminants are highly soluble in water, which makes their removal difficult. Other studies suggest their carcinogenicity, toxicity and mutagenicity. A promising chemical treatment of textile wastewater is the photodegradation of dye molecules in the process of photocatalysis in the presence of a photocatalyst. One-dimensional nanostructures exhibit a high surface-to-volume ratio and a quantum confinement effect, making them ideal candidates for nanophotocatalyst material. Nb2O5 is, among other metal oxides with a wide band gap, gaining popularity in optical applications, and electrospun niobium oxide nanostructures, despite their ease and low cost, can increase the chemical removal of textile dyes from wastewater. Facile synthesis of electrospun one-dimensional niobium oxide nanofibers is presented. The nanophotocatalysts morphology, structure, chemical bonds and optical properties were examined. Based on photodegradation of aqueous solutions (ph=6) of methylene blue and rhodamine B, the photocatalytic activity was established. The photocatalytic efficiency after 180 minutes of ultraviolet irradiation in the presence of Nb2O5 nanofibers was as follows: 84.9% and 31.8% for methylene blue and rhodamine B decolorization, respectively.

8

Fabrication and Characterization of Fibrous Polycaprolactone Blended with Natural Green Tea Extracts Using Dual Solvent Systems

Mohd Rashid Ainatul Aqilah Binti, Jaganathan Saravana Kumar, Mohd Khudzari Ahmad Zahran, Ismail Ahmad Fauzi

Autex Research Journal

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2022

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Vol. 22, no. 4

404--410

EN

Nanofibrous dressings serve as an impeccable candidate in the management of wounds. Nanofibrous composites composed of polycaprolactone (PCL) and green tea using dual solvent systems at different ratios were fabricated through electrospinning. Pure PCL electrospun fibers along with composites were characterized by using scanning electron microscopy (SEM), wettability, water uptake analysis, and Fourier transform infrared spectroscopy (FTIR). SEM indicated that fibrous morphology and the diameter of PCL/green tea were smaller for chloroform/ dimethylformamide (DMF) (601 nm) and acetone/DMF (896 nm) than the pure PCL (673 nm and 1,104 nm for chloroform/DMF and acetone/DMF, respectively). Wettability of the fabricated composites was increased, and pure PCL fibers were slightly more hydrophobic (100°) than PCL/green tea (94°). Water uptake of the composites was enhanced compared with PCL significantly in acetone/DMF. The PCL/green tea nanofibrous wound dressing with enhanced physicochemical properties serves as an indispensable candidate for wound healing applications.

9

Influence of molecular weight on dielectric properties and piezoelectric constant of poly(vinylidene fluoride) membranes obtained by electrospinning

Zahari Aminatul Sobirah, Mazwir Muhammad Hafiz, Misnon Izan Izwan

Polimery

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2021

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T. 66, nr 10

532--537

EN

A significant influence of the molecular weight on the dielectric properties and piezoelectric constant of poly(vinylidene fluoride) (PVDF) membranes obtained by electrospinning was demonstrated. Electrochemical impedance spectroscopy and d33 meter were used to evaluate dielectric properties and piezoelectric constant respectively. The presence of the β-phase was determined by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The membranes with the lowest molecular weight (180,000 g/mol) possessed the best dielectric properties. They also had the highest piezoelectric constant (21 pC/N) and dielectric constant (2.9 at 50 Hz) as well as the highest β-phase content (80.25%).

PL

Wykazano istotny wpływ masy cząsteczkowej na właściwości dielektryczne i stałą piezoelektryczną membran poli(fluorku winylidenu) (PVDF) otrzymanych metodą elektroprzędzenia. Do oceny stałej piezoelektrycznej i właściwości dielektrycznych stosowano, odpowiednio, miernik d33 i spektroskopię impedancyjną. Obecność fazy β określono za pomocą spektroskopii w podczerwieni z transformacją Fouriera (FTIR) i dyfrakcji rentgenowskiej (XRD). Membrany o najmniejszej masie cząsteczkowej (180 000 g/mol) charakteryzowały się najlepszymi właściwościami dielektrycznymi. Miały również największą stałą piezoelektryczną (21 pC/N) i stałą dielektryczną (2,9 przy 50 Hz) oraz największą zawartość fazy β (80,25%).

10

Preparation and Characterisation of Vitamin-Loaded Electrospun Nanofibres as Promising Transdermal Patches

Parın Fatma Nur, Yıldırım Kenan

Fibres & Textiles in Eastern Europe

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2021

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Vol. 29, no. 1 (145)

17--25

EN

In this study, bioactive fibres were produced using polyvinyl alcohol (PVA), gelatin, polyvinyl pyrrolidone (PVP) as a polymer matrix, and different amounts of folic acid (FA) as a vitamin using the electrospinning technique. Loading of the folic acid in the polymers was determined by Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy (ATR-FTIR); morphologies and average diameters were analysed by Scanning Electron Microscopy (SEM), and Thermal Gravimetric Analysis (TGA) was applied to determine thermal behaviours. The FTIR spectra and TGA thermograms showed the successful incorporation of folic acid into the fibres. SEM images showed that various smooth and heterogenous electrospun fibres were produced with average diameters ranging from 125 to 980 nm. An in-vitro study was carried out using dissolved FA in an artificial sweat solution (acidic media, pH 5.44), and UV-Vis analysis of electrospun fibres was made. The in vitro release study showed that the FA loaded nanofibres had initial vitamin burst release behaviour. The maximum vitamin release percentage of the PVA/FA, gelatin/FA, and PVP/FA fibres was obtained as 86.88%, 80.2%, and 76.66%, respectively. From these results, we can state that FA-loaded fibres can be potential candidates for transdermal patches and topical applications.

PL

Wyprodukowano elektroprzędzione bioaktywne włókna, do których wytworzenia użyto polialkoholu winylowego (PVA), żelatyny, poliwinylopirolidonu (PVP) jako matrycy polimerowej oraz różnych ilości kwasu foliowego (FA) jako witaminy. Obecność kwasu foliowegow w polimerach określono metodą spektroskopii w podczerwieni z osłabionym całkowitym odbiciem i transformacją Fouriera (ATR-FTIR); morfologię i średnie średnice analizowano za pomocą skaningowej mikroskopii elektronowej (SEM), a do określenia zachowań termicznych zastosowano analizę termograwimetryczną (TGA). Widma FTIR i termogramy TGA wykazały udane włączenie kwasu foliowego do włókien. Obrazy SEM pokazały, że wytworzono gładkie i heterogeniczne włókna elektroprzędzone o średnich średnicach w zakresie od 125 do 980 nm. Przeprowadzono badanie in vitro z użyciem rozpuszczonego FA w roztworze sztucznego potu (środowisko kwaśne, pH 5,44) oraz wykonano analizę UV-Vis włókien elektroprzędzonych. Badanie uwalniania in vitro wykazało, że nanowłókna obciążone FA wykazywały początkowo gwałtowne uwalnianie witamin. Maksymalny procent uwalniania witamin z włókien PVA/FA, żelatyna/FA i PVP/FA wyniósł odpowiednio 86,88%, 80,2% i 76,66%. Na podstawie tych wyników stwierdzono, że włókna obciążone FA mogą być potencjalnymi kandydatami do stosowania plastrów przezskórnych i zastosowań miejscowych.

11

Improving the Water-Repellent and Antifungal Properties of Electrospun Cellulose Acetate Materials by Decoration with ZnO Nanoparticles

Nachev Nasko, Spasova Mariya, Manolova Nevena, Rashkov Iliya, Naydenov Mladen

Fibres & Textiles in Eastern Europe

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2021

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Vol. 29, no. 3 (147)

40--45

EN

Suitable conditions for the preparation of nano- and microstructured materials from cellulose acetate and cellulose acetate/ZnO from solutions/suspensions in aceton/water by electrospinning/electrospraying were found. The materials obtained were characterised by scanning electron microscopy (SEM), X-ray diffraction analysis (XRD) and contact angle measurements. The antifungal activity of the materials obtained against Phaeomoniella chlamydospora, which is one of the main species causing diseases in grapevines, was studied as well. It was found that electrospinning of CA solutions with a concentration of 10 wt% reproducibly resulted in the preparation of defect-free fibres with a mean fibre diameter of ~780 nm. The incorporation of ZnO nanoparticles resulted in the fabrication of hybrid materials with superhydrophobic properties (contact angle 152°). The materials decorated with ZnO possessed antifungal activity against P. chlamydospora. Thus, the fibrous materials of cellulose acetate decorated with ZnO particles obtained can be suitable candidates to find potential application in agriculture for plant protection.

PL

W pracy wskazano odpowiednie warunki do otrzymywania materiałów nano- i mikrostrukturalnych z octanu celulozy i octanu celulozy/ZnO z roztworów/zawiesin w acetonie/wodzie metodą elektroprzędzenia/elektrorozpylania. Uzyskane materiały scharakteryzowano za pomocą skaningowej mikroskopii elektronowej (SEM), dokonano analizy dyfrakcji rentgenowskiej (XRD) oraz pomiarów kąta zwilżania. Zbadano również działanie przeciwgrzybiczne uzyskanych materiałów przeciwko Phaeomoniella chlamydospora, który jest jednym z głównych gatunków wywołujących choroby winorośli. Stwierdzono, że podczas elektroprzędzenia z roztworów CA o stężeniu 10% wag. w sposób powtarzalny otrzymywano włókna wolne od defektów o średniej średnicy ~ 780 nm. Wprowadzenie nanocząstek ZnO zaowocowało wytworzeniem materiałów hybrydowych o właściwościach superhydrofobowych (kąt zwilżania 152°). Materiały z dodatkiem ZnO wykazywały działanie przeciwgrzybiczne przeciwko P. chlamydospora. Stwierdzono, że otrzymane materiały mogą być stosowane w rolnictwie do ochrony roślin.

12

Comparative Analysis of Electrospinning Methods for Producing Fibres and Materials with a Predicted Structure and Complex of Properties

Filatov Ivan, Bokova Elena, Smulskaya Maria, Kapustin Ivan, Pawlowa Maria, Kovalenko Grigory

Fibres & Textiles in Eastern Europe

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2021

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Vol. 29, no. 4 (148)

69--74

EN

Various industrial methods of electrospinning are considered. Experimental data of the results of electrospinning from solutions of chlorinated polyvinyl chloride, polyamide-6/66 and fluoroplastic F-42, obtained by various methods are presented.

PL

Rozważaniom poddano różne przemysłowe metody elektroprzędzenia. Przedstawiono dane doświadczalne wyników elektroprzędzenia z roztworów chlorowanego polichlorku winylu, poliamidu-6/66 i fluoroplastu F-42.

13

Characterization of morphology and optical properties of SnO₂ nanowires prepared by electrospinning

Tański Tomasz, Smok Weronika, Matysiak Wiktor

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2021

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Vol. 69, nr 5

art. no. e137507

EN

The growing interest in one-dimensional tin oxide-based nanomaterials boosts research on both high-quality nanomaterials as well as production methods. This is due to the fact that they present unique electrical and optical properties that enable their application in various (opto)electronic devices. Thus, the aim of the paper was to produce ceramic SnO₂ nanowires using electrospinning with the calcination method, and to investigate the influence of the calcination temperature on the morphology, structure and optical properties of the obtained material. A scanning electron microscope (SEM) and Fourier-transform infrared spectroscopy (FTIR) were used to examine the morphology and chemical structure of obtained nanomaterials. The optical properties of manufactured one-dimensional nanostructures were investigated using UV-Vis spectroscopy. Moreover, based on the UV-Vis spectra, the energy band gap of the prepared nanowires was determined. The analysis of the morphology of the obtained nanowires showed that both the concentration of the precursor in the spinning solution and the calcination temperature have a significant impact on the diameter of the nanowires and, consequently, on their optical properties.

14

The Removal of Reactive Red 141 From Wastewater: A Study of Dye Adsorption Capability of Water-Stable Electrospun Polyvinyl Alcohol Nanofibers

Akduman Çigdem, Morsümbül Seniha, Akçakoca Kumbasar Emriye Perrin

Autex Research Journal

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2021

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Vol. 21, no. 1

20--31

EN

The dye production and its use in textile and related industries resulted in discharge of dye to wastewater. Adsorption for color removal is known as equilibrium separation process, and the resultant decolorization is influenced by physicochemical factors such as adsorbent surface area. The nanofiber membranes prepared by the electrospinning method have controllable nanofiber diameter and pore size distribution (PSD) with a high surface area to volume or mass ratio. In this study, polyvinyl alcohol (PVA) nanofibrous membranes were prepared by the electrospinning method at different collection times such as 3, 5 and 10 h and heat fixated at 130, 150 and 170°C for 10 min, and then, the adsorption capability of PVA nanofiber membranes for Reactive Red 141 from aqueous solution was investigated. In order to make PVA nanofibers stable to water, the nanofibrous membranes were chemically cross-linked by a polycarboxylic acid (1,2,3,4 butanetetracarboxylic acid (BTCA)). PVA nanofibrous membranes were characterized by scanning electron microscopy, thermogravimetric analysis, swelling tests and pore size analysis. The results indicated that BTCA crosslinking improved the thermal and water stability of the nanofibrous structure but has no significant effect on the pore sizes of the membranes. Adsorption of Reactive Red 141 was studied by the batch technique, and it was observed that PVA nanofibers removed approximately >80% of the dye.

15

Fabrication of Multifunctional Nano Gelatin/Zinc Oxide Composite Fibers

Zare Hamed, Nayebzadeh Shahnaz, Davodiroknabadi Abolfazl, Hataminasab Sayyed Hasan

Autex Research Journal

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2021

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Vol. 21, no. 4

403--407

EN

According to health studies, reinforcing gelatin is necessary in order to obtain the multifunctional material. In this study, nano zinc oxide (ZnO; at concentrations of 0.5%, 1% and 1.5%) was doped with gelatin and the solution was electrospun under specific conditions to obtain multifunctional gelatin/ZnO nanofibers. The morphology of the nanofibers was studied by field emission scanning electron microscope (FESEM), and energy-dispersive X-ray spectrometry (EDX) analysis indicated the presence of nano Zn on the surface of gelatin fibers. On the contrary, elemental mapping analysis proved the distribution of nano material along the nano gelatin fibers. The results show that the produced nano gelatin/ZnO composite increases the ultraviolet (UV) blocking of fabric significantly. It is also observed that electrospun gelatin/ZnO nanofibers have excellent bactericidal property against both Bacillus cereus (Gram-positive) and Escherichia coli (Gram-negative) bacteria.

16

Electrostatic fabrication of polymer nanofibers

Czapka Tomasz, Kopaniarz Tomasz, Woś Angelika

Przegląd Elektrotechniczny

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2020

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R. 96, nr 2

174--177

EN

Fabrication process of nanofibers from the liquid polymer solution using electrospinning is described in the paper. In the experiments, polyvinylidene fluoride (PVDF) and dimethylformamide (DMF) were used as a polymeric material and a solvent, respectively. Additionally, the results of the measurements of diameters of obtained fibers, current-voltage characteristics of the process and calculation of resistivity of liquid polymer are presented.

PL

W pracy przedstawiono proces elektrostatycznego wytwarzania nanowłókien z roztworu ciekłego polimeru. W procesie elektroprzędzenia w roli polimeru i rozpuszczalnika użyto odpowiednio polifluorek winylidenu (PVDF) i dimetyloformamid (DMF). Dodatkowo badania obejmowały pomiary średnic otrzymanych włókien, charakterystyk prądowo-napięciowych procesu oraz wyznaczenie rezystywności ciekłego polimeru.

17

Elektroprzędzone nanowłókna polimerowe do zastosowań medycznych

Winkler Angelika, Maliszewska Irena, Czapka Tomasz

Polimery

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2020

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T. 65, nr 1

18--24

PL

Nanowłókna polimerowe wzbudzają obecnie ogromne zainteresowanie ze względu na ich potencjalne wykorzystanie w różnych procesach technologicznych, np. w produkcji tkanin lub wytwarzaniu membran. Włókna te wykazują wyjątkowe właściwości, takie jak: duży stosunek powierzchni do objętości oraz duża porowatość. Znanych jest kilka metod wytwarzania nanowłókien, jednak ze względu na prostotę, powtarzalność i niewielkie koszty, najpowszechniej stosowane jest przędzenie elektrostatyczne. Przedstawiono przegląd najnowszych osiągnięć w zakresie zastosowań nanowłókien polimerowych w medycynie, obejmujący zagadnienia materiałów opatrunkowych, uwalniania substancji aktywnych oraz inżynierii tkankowej.

EN

Polymer nanofibers are currently of great interest in terms of their potential use in various technological processes, e.g. in the manufacture of textiles or membranes. These fibers are characterized by extraordinary properties such as high surface to volume ratio and high porosity. There are several methods of manufacturing nanofibers, but for reasons of simplicity, repeatability and low cost, electrostatic spinning is the most common. The article presents a review of the latest developments in the application of polymer nanofibers in medicine, including such issues as bandage materials, release of active substances and tissue engineering.

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Effect of MoS2 Nanosheet Fillers on Poly(vinyl alcohol) Nanofibre Composites Obtained by the Electrospinning Method

Yuan Bin, Liu Jun, Qiu Lei, Hui Qian, Chang Meng-Jie, Li Ya-Qing

Fibres & Textiles in Eastern Europe

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2020

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Vol. 28, no. 3 (141)

62--67

EN

The graphene-like two dimensional (2D) inorganic materials have been been shown great interest for a variety of applications. In this work, polymer composite nanofibres containing molybdenum disulfide (MoS2) nanosheets were obtained by electrospinning. The MoS2 nanosheets were well dispersed inside the fibres, and the nanofibres maintained the fibre morphology well with the MoS2 nanosheets embedded. The incorporation of MoS2 nanosheets changes polymer nanofibre morphology from round to ribbon-like. Moreover, through thermogravimetric (TG) analysis and dynamic mechanical thermal analysis (DMTA) measurements, it was found that the MoS2 nanosheets as an additive material led to an increase in thermal stability and in the storage modulus. This work comprises an extensive approach to producing a novel 2D inorganic-organic composite structure, which should be applicable for membrane engineering with enhanced thermal and mechanical stability.

PL

Dwuwymiarowe nieorganiczne materiały podobne do grafenu wywołały liczne zainteresowanie w różnych zastosowaniach. W pracy otrzymano metodą elektroprzędzenia kompozytowe nanowłókna polimerowe zawierające disiarczek molibdenu (MoS2). Nanoskładniki MoS2 były dobrze rozproszone we włóknach, a ich morfologia była na zadowalającym poziomie. Włączenie nanoskładników MoS2 zmienia nanowłókna polimerowe z morfologii okrągłej na wstążkową. Co więcej, dzięki analizie termograwimetrycznej (TG) i pomiarom dynamicznej mechanicznej analizy termicznej (DMTA) stwierdzono, że dodatek MoS2 może zapewnić wzrost stabilności termicznej i zwiększyć moduł przechowywania. Praca prezentuje rozszerzone podejście do produkcji nowej dwuwymiarowo nieorganiczno-organicznej struktury kompozytowej, która może mieć zastosowanie w wytwarzaniu membran o podwyższonej stabilności termicznej i mechanicznej.

19

Study of the Properties and Cells Growth on Antibacterial Electrospun Polycaprolactone/Cefuroxime Scaffolds

Mijovic Budimir, Zdraveva Emilija, Bajsić Emi Govorčin, Slivac Igor, Dekaris Iva, Grgurić Tamara Holjevac, Ferri Tea Zubin

Autex Research Journal

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2020

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Vol. 20, no. 3

312--318

EN

Electrospun materials are good candidates for the design of tissue regeneration scaffolds as they can simulate the natural surroundings of tissue cells. The study proposes electrospun polycaprolactone (PCL)/cefuroxime (CFU) scaffolds for human cell culture and investigates the influence of the antibiotic content on scaffold morphology, thermal and mechanical properties. The increase in the CFU concentration resulted in the reduction of fiber diameter and number of deformations. It also influenced the reduction of scaffold thermal enthalpies and improved scaffold break strength. With regard to cell growth, the scaffolds showed precedence in greater colonization of the HeLa cells. Finally, these scaffolds showed compatibility with standard human cell lines, and thus they can be used for the repair of damaged tissues.

20

Performance of Electrospun Polyvinylidene Fluoride Nanofibrous Membrane in Air Filtration

Xiao Yuanxiang, Wen Enlong, Sakib Nazmus, Yue Zhonghua, Wang Yan, Cheng Si, Militky Jiri, Venkataraman Mohanapriya, Zhu Guocheng

Autex Research Journal

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2020

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Vol. 20, no. 4

552--559

EN

Polyvinylidene fluoride (PVDF) fibrous membranes with fiber diameter from nanoscale to microscale were prepared by electrospinning. The structural parameters of PVDF fibrous membrane in terms of fiber diameter, pore size and its distribution, porosity or packing density, thickness, and areal weight were tested. The relationship between solution concentration and structural parameters of fibrous membrane was analyzed. The filtration performance of PVDF fibrous membrane in terms of air permeability and filtration efficiency was evaluated. The results demonstrated that the higher solution concentration led to a larger fiber diameter and higher areal weight of fibrous membrane. However, no regular change was found in thickness, porosity, or pore size of fibrous membrane under different solution concentrations. The air permeability and filtration efficiency of fibrous membrane had positive correlations with pore size. The experimental results of filtration efficiency were compared with the predicted values from current theoretical models based on single fiber filtration efficiency. However, the predicted values did not have a good agreement with experimental results since the fiber diameter was in nanoscale and the ratio of particle size to fiber diameter was much larger than the value that the theoretical model requires.