Polyethylene/graphite nanocomposites obtained by <i>in situ</i> polymerization

Fim, Fabiana de Carvalho; Guterres, Jonathan M.; Basso, Nara Regina de Souza; Galland, Griselda B.

doi:10.1002/pola.23822

Cited by 126 publications

(64 citation statements)

References 22 publications

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“…It can be observed that melt and crystallization temperature showed no significant change regardless of the nanoparticle and the preparation process. This behavior was also observed by different authors [14,[21][22][23]. The preparation methods interfere in the crystallinity index of neat HDPE (P00S and P00M).…”

Section: Resultssupporting

confidence: 54%

“…Jiang and Drzal [16] report an increase in the crystallinity degree for nanocomposites obtained by melt intercalation, and they pointed out that the nanoparticles act as a nucleation site, reducing the onset crystallization temperature. Fim et al [23] observed no significant change in the crystallinity degree in the nanocomposites with 1.2 wt% and 2.8 wt% of graphenes prepared by in situ polymerization. This behavior of crystallinity index can be related to the dispersion of the nanoparticules.…”

Section: Resultsmentioning

confidence: 99%

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Influence of mixing methods on the properties of high density polyethylene nanocomposites with different carbon nanoparticles

et al. 2017

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In this paper, nanocomposites with multiwalled carbon nanotubes (MWCNT) or graphene nanosheets were prepared using a high density polyethylene (HDPE) matrix. Two different processes were employed: a solution method and a melt mixing method. The crystallinity index of the HDPE showed similar levels in nanocomposites after the addition of carbon nanotubes. It can be seen that the preparation process modified the degree of crystallinity of the HDPE matrix with graphene nanosheets. Nanocomposites prepared by the solution method showed a decrease in the crystallinity index. The addition of carbon nanotubes led to an increase of Young´s Modulus with an increase in the MWCNT quantity, regardless of the preparation process used, with a 22.8 % increase for composites with 0.5 wt% of CNTs. The nanocomposites with graphene nanosheets exhibited a different behavior with each mixing method. Nanocomposites prepared by the solution method showed a higher Young´s Modulus than those prepared by melt mixing. Results of transmission electronic microscopy and field emission scanning electronic microscopy indicated homogeneous dispersion for carbon nanotubes in melt mixing. Graphene nanocomposites showed some agglomerates, with smaller platelets in the nanocomposites prepared by solution mixing compared to that prepared by the melt mixing.

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Section: Resultssupporting

confidence: 54%

Section: Resultsmentioning

confidence: 99%

Influence of mixing methods on the properties of high density polyethylene nanocomposites with different carbon nanoparticles

et al. 2017

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“…In situ polymerization is the most common and highly efficient method for preparing GO-based composites. Polyethylene- [108], polypropylene- [109], poly(methyl methacrylate)- [110], polypyrrole- [111,112], polyaniline- [113], polyurea- [114] and copolymer- [115] matrix GO nanocomposites are successfully prepared by using in situ polymerization.…”

Section: Go-based Nanocompositesmentioning

confidence: 99%

The Preparation of Graphene Oxide and Its Derivatives and Their Application in Bio-Tribological Systems

et al. 2014

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Graphene oxide (GO) can be readily modified for particular applications due to the existence of abundant oxygen-containing functional groups. Graphene oxide-based materials (GOBMs), which are biocompatible and hydrophilic, have wide potential applications in biomedical engineering and biotechnology. In this review, the preparation and characterization of GO and its derivatives are discussed at first. Subsequently, the biocompatibility and tribological behavior of GOBMs are reviewed. Finally, the applications of GOBMs as lubricants in bio-tribological systems are discussed in detail.

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“…A adição de monômero olefínico leva à síntese de cadeias poliméricas exclusivamente localizadas nos arredores da superfície do NTC que, com o aumento de massas moleculares, precipita-se sobre os nanotubos, cobrindo-os e levando a uma eficiente desaglomeração [1,17,22] . Nos últimos anos nosso grupo de pesquisa vem trabalhando na obtenção de nanolâminas de grafeno (NG) (empilhamento de poucos grafenos) através de esfoliação química e térmica da grafite e na preparação de nanocompósitos de polietileno (PE) [25,26] e de polipropileno (PP) [27][28][29] utilizando a técnica de polimerização in situ. Nosso primeiro trabalho nesta área [25] , foi citado em uma recente revisão [30] como sendo o primeiro utilizando esta técnica para obter nanocompósitos de PE/NG.…”

Section: -Comparação Entre Nanocompósitos De Polietileno/nanotubos Deunclassified

Comparação entre Nanocompósitos de Polietileno/Nanotubos de Carbono e Polietileno/Nanolâminas de Grafeno Obtidos por Polimerização In Situ

Fim¹,

Radaelli²,

Azambuja³

et al. 2014

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Resumo: Nanocompósitos de polietileno/nanotubos de carbono foram sintetizados através da polimerização in situ para serem comparados com nanocompósitos de polietileno/nanolâminas de grafeno, obtidos nas mesmas condições. Os nanocompósitos de polietileno/NTC foram obtidos com boas atividades catalíticas e foram caracterizados por DSC e MET. Os nanocompósitos com NG apresentaram melhor estabilidade térmica que os de NTC, porem não houve diferenças significativas nas propriedades dinâmico-mecânicas. No estudo da condutividade elétrica os nanocompósitos PE/NTC atingiram condutividades de materiais semicondutores com menor teor de nanocarga que os de PE/NG. Palavras-chave: Nanolâminas de grafeno, nanotubos de carbono, polietileno, nanocompósitos. Comparison between Polyethylene/Carbon Nanotubes and Polyethylene/Graphene Nanosheets Nanocomposites Obtained by In Situ Polymerization Abstract: Polyethylene/carbon nanotubes, PE/NTC, nanocomposites were synthesized by in situ polymerization for comparison with polyethylene/graphene nanosheets, PE/NG, nanocomposites obtained in the same conditions. The nanocomposites of polyethylene/NTC were obtained with good catalytic activities and were characterized by DSC and TEM. The nanocomposites with NG showed better thermal stability than with NTC, however, no significant differences in dynamic mechanical properties were found. In the electrical conductivity study, PE/NTC nanocomposites reached conductivities of semiconductor materials at lower content of filler than PE/NG nanocomposites.

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Polyethylene/graphite nanocomposites obtained by in situ polymerization

Cited by 126 publications

References 22 publications

Influence of mixing methods on the properties of high density polyethylene nanocomposites with different carbon nanoparticles

Influence of mixing methods on the properties of high density polyethylene nanocomposites with different carbon nanoparticles

The Preparation of Graphene Oxide and Its Derivatives and Their Application in Bio-Tribological Systems

Comparação entre Nanocompósitos de Polietileno/Nanotubos de Carbono e Polietileno/Nanolâminas de Grafeno Obtidos por Polimerização In Situ

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