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Characteristic of fish collagen films cross-linked with glutaraldehyde

Kulka-Kamińska Karolina, Brudzyńska Patrycja, Sionkowska Alina, Lewandowska Katarzyna, Piwowarski Łukasz

Engineering of Biomaterials

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2023

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vol. 26, no. 168

25--32

EN

Collagen is a valuable biopolymer in many fields, especially in biomedical sciences. Thanks to its biodegradability and high biocompatibility, it is a desirable material for applications that require contact with the human body. There are many sources of collagen, of which marine-origin collagen has become an important one in recent times. Pure collagen has poor stability and is sensitive to the effects of heat and other external factors. The cross-linking process can improve the properties of collagen materials. Many different methods of cross-linking can be distinguished, including chemical ones. In this study, we were concerned to obtain collagen films modified with glutaraldehyde (GTA). The influence of this additive on the chemical, mechanical, swelling, and hydrophilic properties of the biopolymeric matrix was evaluated. Two different concentrations of collagen were used, as well as three different concentrations of GTA. Results of the analysis showed that the properties of the obtained films were affected by the addition of even a small amount of cross-linker. Spectroscopic measurements indicated minor changes that reflect interactions between GTA and the collagen matrix. Mechanical tests showed changes for modified samples in values of tensile strength, breaking force, and elongation at break. The hydrophilicity decreased slightly for films with GTA. The durability of the modified samples in the swelling test increased. Differences between 1% and 2% collagen films with additives were also observed. The GTA-obtained fish collagen films can be promising materials for biomedical applications.

2

Materials based on chitosan enriched with zinc nanoparticles for potential applications on the skin

Kulka Karolina, Szmejkowska Andżelika, Sionkowska Alina, Wypij Magdalena, Golińska Patrycja

Engineering of Biomaterials

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2022

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vol. 25, no. 167

24--31

EN

Chitosan as a nontoxic, biodegradable, and biocompatible biopolymer with film-forming properties can also be modified to improve its parameters. Modification of polymer films by the addition of nanoparticles is an increasingly common solution due to the higher efficiency of products at the nanoscale compared to the macroscale. In this work, thin chitosan films enriched with biogenic zinc oxide nanoparticles (ZnONPs) from Fusarium solani IOR 825 were obtained by the solvent evaporation method. The influence of nanoadditive on the physicochemical, mechanical, and antimicrobial properties of the polymeric matrix was evaluated. Two different concentrations of ZnONPs were added to the chitosan solution. Spectrometric measurements, mechanical tests, microscopic imaging, and microbiological tests were performed for nanoparticlesmodified and control samples. Analysis revealed that ZnONPs influence the properties of chitosan films. FTIR spectroscopy showed changes that are the result of interactions between polymer matrix and the additive. Modified samples were characterized by increased values of Young’s modulus and tensile strength. SEM analysis combined with energy-dispersive X-ray spectrometry confirmed the presence of zinc in the modified films. The addition of nanoparticles slightly affected the surface morphology of the tested samples, and an increase in roughness was observed. Microbiological tests showed the biostatic activity of the films containing ZnONPs. The obtained films based on chitosan with the addition of ZnONPs can be considered easy-to-obtain biomaterials with potential use as cosmetic and biomedical products.

3

New materials based on hyaluronic acid and egg albumin mixture

Gadomska Magdalena, Musiał Katarzyna, Sionkowska Alina

Engineering of Biomaterials

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2021

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Vol. 24, no. 160

15--21

EN

In this work, new materials based on the mixture of hyaluronic acid and albumin from chicken eggs have been studied. Tests were carried out to determine the molecular weight of the tested hyaluronic acids. The properties of hyaluronic acid were investigated and significant differences were found in the mechanical properties of the tested compound, depending on its molecular weight. It was found that egg albumin can be combined with hyaluronic acid and thin films can be obtained. Spectrometric tests were performed both for pure compounds and for mixtures of hyaluronic acid with chicken egg albumin. IR spectroscopy showed that interactions between hyaluronic acid and egg albumin are mainly by hydrogen bonds, as the shifts in the main bands in IR spectra were observed. The addition of egg albumin to hyaluronic acid leads to the decrease of its mechanical properties. The deterioration of the mechanical properties of polymer films from HA-albumin mixtures may be due to interactions between compounds which were shown in the IR spectra. The thin films based on hyaluronic acid and egg albumin blend can be used as adhesive materials in biomedicine and cosmetics. Both biopolymers are biocompatible and biodegradable so we can expect a biocompatible and biodegradable material for potential application as adhesives.

4

Conducting polymer films for biodegradable metallic cardiovascular stents

Cysewska K., Jasiński P.

Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne

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2018

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T. 23

67--72

EN

In recent years, there is increasing interest to create biodegradable metallic cardiovascular stents instead of using their permanent form. The most interesting materials for this purpose are iron and its alloys. However, in order to use it in clinical application, their degradation rate and biological performance need to be optimized. One promising solution is coating the metal with conducting polymer films. In this work, short overview of the use of the biodegradable iron and iron modified with polypyrrole as materials for cardiovascular stents is presented.

PL

Zastosowanie biodegradowalnych, metalicznych stentów naczyniowych staje się alternatywą dla obecnie używanych ich stałych form. Długotrwała obecność metalowego stentu w tętnicy może prowadzić do powikłań, takich jak zakrzepica czy restenoza w stencie. Odrębnym problemem może być pęknięcie stentu. Dlatego też, prowadzone są badania nad ich biodegradowalnymi formami. W tym celu stosowane są aktywne metale takie, jak na przykład żelazo, których biodegradowalność oparta jest na procesie korozji. Jednak, użycie tych materiałów do zastosowań klinicznych wymaga optymalizacji ich szybkości degradacji. Obiecującym rozwiązaniem jest powlekanie powierzchni takich metali warstwami z polimerów przewodzących. W pracy przedstawiono krótki przegląd wykorzystania biodegradowalnego żelaza oraz żelaza modyfikowanego powłokami z polipirolu, jako materiałów dla stentów sercowo-naczyniowych.

5

Starzenie biodegradowalnej folii ze skrobi termoplastycznej pod wpływem promieniowania UV

Muszyński S., Kwaśniewska A., Oniszczuk T., Szymanek M., Tomczyk A., Leus A., Gładyszewska B.

Przemysł Chemiczny

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2017

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T. 96, nr 4

891--893

PL

Metodą ekstruzji wytworzono folie polimerowe ze skrobi i glicerolu z dodatkiem poli(alkoholu winylowego), po czym eksponowano je na działanie promieniowania UV-C przez okres do 14 dni. Oceniono wpływ fotooksydacji UV na zwilżalność powierzchni, przepuszczalność pary wodnej oraz barwę folii. Stwierdzono, że czas ekspozycji wpływał istotnie na wszystkie analizowane parametry. Z kolei wzrastające stężenie poli(alkoholu winylowego) w mieszance zwiększało hydrofilowość oraz przepuszczalność pary wodnej.

EN

Starch films were produced after addn. of poly(vinyl alcohol) by extrusion, exposed to UV irradn. and studied for wettability and water vapor permeability. An increase in hydrophilicity and permeability after exposition was obsd.

6

Wielowarstwowe filmy polimerowe otrzymywane metodą LbL - warstwa po warstwie (ang. layer-bylayer) : rozwój i zastosowanie

Wójcik A.J.

Wiadomości Chemiczne

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2014

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[Z] 68, 9-10

897--918

EN

The production of varied materials with nanoscale precision requires both suitable components and a right method. In the past two decades, layer-by-layer (LbL) assembly has been proven to be a convenient and versatile technique for fabrication of functional films. The LbL method enables obtaining systems composed of a few or even hundreds layers of beforehand chosen substances, which are characterized by a thickness ranging from nano- to micrometers. The building blocks of LbL assembly include, but are not limited to, synthetic polymers, polymeric microgels, biomacromolecules, (nano)particles, dendritic molecules, and complexes of these species [1]. This method involves simple alternative adsorption of oppositely charged polyelectrolytes on supporting materials [2]. The LbL assembly can be driven by multiple weak interactions, including electrostatic interactions, hydrogen-bonds, halogen-bonds, coordination bonds, charge-transfer interactions, biospecific interactions (e.g., sugar–lectin interactions), cation–dipole interactions, and the combined interaction of the above forces, etc. The multilayered composite films fabricated by means of the LbL technique have generated much interest among researchers worldwide due to the simplicity of the whole process by which they are produced and their numerous applications such as antireflection coatings, superhydrophobic surfaces, electrochromic devices, biosensors, cell adhesion or resistance coatings, drug delivery systems, proton exchange membranes, solar-energy conversion devices, and separation membranes [3]. In this review the evolution of the LbL method and the applications of the multilayered polymer films were discussed.

7

Nanostruktury węglowe i błony lub powłoki polimerowe z ich udziałem. Cz. I. Charakterystyka ogólna, funkcjonalizacja oraz metody badań kompozycji z nanorurkami lub grafenami

Kugler S., Spychaj T.

Polimery

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2013

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T. 58, nr 2

93-99

PL

Artykuł stanowi przegląd literaturowy. Cz. I obejmuje charakterystykę nanostruktur węglowych oraz sposoby ich funkcjonalizacji w celu wykorzystania w charakterze napełniaczy w matrycach polimerowych. Opisano również metody badań kompozycji i nanokompozytów zawierających struktury węglowe.

EN

In this study, we present a literature review on the polymer films and coatings with carbon nanoparticles. The first part of the article describes the characteristics of carbon nanostructures and methods used for their functionalization (noncovalent and covalent) with the aim of using them as fillers in polymeric matrices. The methods used to examine the compositions and nanocomposites with carbon nanostructures are also discussed.

8

Nanostruktury węglowe i błony lub powłoki polimerowe z ich udziałem

Kugler S., Spychaj T.

Polimery

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2013

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T. 58, nr 3

177-180

PL

W cz. II. artykułu przedstawiono najnowsze osiągnięcia w dziedzinie otrzymywania błon i powłok polimerowych z nanostrukturami węglowymi, użytymi w roli zarówno napełniaczy, jak i odrębnych błon z materiału węglowego.

EN

In the second part of the article, the latest developments in the field of preparation of polymer films and coatings with carbon nanostructures, used both as fillers and separate layers of carbon material, have been presented.

9

The local order and mobility in polymer films generated by orientation drawing

Maximov A. V., Shevchenko S. S., Maximova O. G.

International Journal of Applied Mechanics and Engineering

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2003

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Vol. 8, no spec.

339-345

EN

Statistical and local relaxation properties of two-dimensional finite polymer systems (domains) are considered. The domains consist of a large number of semirigid chains with the finite contour length at free, half-free and fixed boundary conditions for chain ends. The intermolecular orientation short-order in the thick domains is similar to the order in infinite two-dimensional systems. The correlations of orientation between sufficiently distant elements of different chains decay by the exponential law, but the effective constant of interchain interactions in the domain is proportional to the molecular weight of the chain. At the given intra- and interchain interactions an elongtation of the chains leads to a local ordering of chains in the domain (at free boundary conditions) or, on the contrary, to the decreasing of the parameter of short-range orientation order (at fixed and half-free boundary conditions). Independently of type of boundary conditions the parameter of large-range orientation order tends to zero with increasing of the chain contour length. Dynamical equations and relaxation spectrums for times of local motions are obtained. Times of local mobility of chains were calculated from the time correlation functions of local relaxation in depending on the bending rigidity of chains, the parameter of interchain interactions and the contour length of chains. At the given intra-and interchain interactions an elongtation of chains forming the domain may lead to a slowing-down of local mobility of chains in the domain. The comparison with experimental date obtained by dielectric relaxation and polarized luminescence methods on investigation of local mobility in the dilute melts of comb-shaped polymers has been carried out.