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Mechanical and thermal properties of hybrid nanocomposites prepared by in situ polymerization

Paszkiewicz S., Pawelec I., Szymczyk A., Rosłaniec Z.

Polimery

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2016

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T. 61, nr 3

172--180

EN

Poly(trimethylene terephthalate) (PTT) nanocomposites containing carbon nanoadditives which differ in shape (1D, 2D) and particle size were synthesized by in situ polymerization method. SEM and TEM images showed that expanded graphite (EG) and single-walled carbon nanotubes (SWCNTs) were well dispersed in PTT, suggesting that in situ polymerization is a highly efficient method for preparing nanocomposites. Synergistic effect between single-walled carbon nanotubes and expanded graphite on improving mechanical and thermal properties of the prepared nanocomposites has been observed.

PL

Metodą polimeryzacji in situ zsyntetyzowano nanokompozyty na bazie poli(tereftalanu trimetylenu) (PTT) zawierające nanododatki węglowe [jednościenne nanorurki węglowe (SWCNTs) i grafit ekspandowany (EG)] różniące się kształtem (1D, 2D) i wielkością cząstek. Badania metodami SEM i TEM wykazały, że nanowarstwy grafitu i nanorurki są dobrze zdyspergowane w PTT, co sugeruje, że polimeryzacja in situ jest bardzo skuteczną metodą wytwarzania nanokompozytów. Zaobserwowano synergiczny wpływ nanorurek węglowych i ekspandowanego grafitu na poprawę właściwości mechanicznych i termicznych otrzymanych nanokompozytów.

2

Nanocomposites consisting of SWCNTs/DWCNTs decorated with Re nanoparticles

Dobrzańska-Danikiewicz A. D., Wolany W.

Archives of Materials Science and Engineering

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2015

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Vol. 74, nr 2

53--57

EN

Purpose: The main aim of this work is to present a method for manufacturing nanocomposite consisting of single and double-walled carbon nanotubes and rhenium nanoparticles. A decoration process was started with functionalization of CNTs, then placed CNTs in a medium containing rhenium precursors, inserted it in quartz vessel and finally heating wet material in the atmosphere of H2 and in the shield of inert gas Ar. Design/methodology/approach: The microscope examinations of single- and double walled carbon nanotubes decorated with Re were carried out with the TEM and STEM mode using an HAADF detector. An energy dispersive spectroscope (EDS) was employed to determine chemical composition of the material. Findings: This paper shows the fabrications of SWCNTs/DWCNTs–Re hybrid nanostructures. The researches has found that rhenium nanocrystals are located in the outer walls and in the core of the carbon nanotubes. Research limitations/implications: The development of CNTs decorated with metal nanoparticles has concerned intensive interest in the last decade because of their outstanding sensing properties. CNTs-based gas sensors are attractive because of their small size, low weight, low power consumption, ultra sensitivity (high and prompt response). Originality/value: Rhenium is a heavy metals, possesses very high melting and boiling point, good electrical and thermal properties, and is used in the developing industries such as space, electrical, petrochemicals, chemicals. Searching for new uses of Re, including as a component of nanocomposites composed of CNTs is purposeful and interesting.

3

Interactions of anionic polysaccharides with carbon nanotubes

Polaczek E., Stobiński L., Mazurkiewicz J., Tomasik P., Kołoczek H., Lin H.

Polimery

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2007

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T. 52, nr 1

34-38

EN

Agarose, i-, k-, and l-carrageenans, and xanthan gum in aqueous solutions interacted with single-walled carbon nanotubes (SWCNTs) as proven by their wetting in solution and by the microRaman spectroscopy, rheological studies, and differential scanning calorimetry. The investigations provided evidence that the effect of complexation of polysaccharides was independent of the possibility of the formation of helical complexes. Complexation involved, to a certain extent, interactions between hydrophobic surface of nanotubes and hydrophobic sides of the saccharide units of polysaccharides. However, clathration of nanotubes in the polysaccharide matrices was also essential. Formation of the clathrate cages involved intra- and intermolecular hydrogen bonds within polysaccharides.

PL

Agaroza, i-, k- i l- karageny oraz guma ksantanowa (wzór I) w roztworze wodnym oddziałują z jednościennymi nanorurkami węglowymi, co potwierdzono analizując widma Ramana oraz wyniki badań reologicznych i skaningowej kalorymetrii różnicowej (tabela 1 i 2). Badania dostarczyły dowodów na to, że efekt kompleksowania polisacharydów nie zależy od możliwości otaczania nanorurek helisami polisacharydowymi. Kompleksowanie polega w pewnej mierze na oddziaływaniach między hydrofobową stroną merów polisacharydów (rys. 2), a hydrofobową powierzchnią nanorurek. Jednakże istotne jest też klatratowanie nanorurek w matrycy polisacharydowej. Klatki tworzą się dzięki zarówno wewnątrz- jak i międzycząsteczkowym oddziaływaniom polisacharydów za pośrednictwem wiązań wodorowych.

4

Badanie biozgodności jednościennych nanorurek węglowych w warunkach in vitro i in vivo

Frączek A., Menaszek E., Czajkowska B., Bacakova L., Błażewicz M.

Engineering of Biomaterials

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2007

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Vol. 10, no. 69-72

8-11