Composites of glass/modified jute fabric and unsaturated polyester resin

Varma, I. K.; Krishnan, Sreejith; Krishnamoorthy, S.

doi:10.1016/0010-4361(89)90664-2

Cited by 101 publications

(37 citation statements)

References 6 publications

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“…Natural fibers have already established a track record as simple filler material in automobile parts. Natural fibers like sisal, hemp, kenaf, jute, coir, oil palm fiber have been proved to be good reinforcement in thermosets and thermoplastic matrices [1][2][3][4] . Previous studies have proved hemp fibers to be an effective reinforcement in polymer matrix [5] .…”

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical analysis and crystalline analysis of hemp fiber reinforced cellulose filled epoxy composite

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Dynamic mechanical analysis and crystalline analysis of hemp fiber reinforced cellulose filled epoxy composite

et al. 2017

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“…The potential advantage of using the coupling agent method is their natural attraction with both the natural fibers and the resin matrix during curing. 8,9 The effectiveness of these coupling agents in composites is known to be influenced by its physical state on the surface of fibers and fiber surface characteristics itself. 10 Undercured coupling agent layers may diffuse into the matrix resin to form an entangled network with resin, which lost a potential crosslinking site at the interface.…”

Section: Introductionmentioning

confidence: 99%

“…9,[13][14][15] In these, it was shown that proper treatment applied to the fibers could result in a compatible surface with the resin matrix that improves the quality of the polymer composites. Mercerization prior to silane treatment was another effective means of advocating better property retention of composites exposed to moisture.…”

Section: Introductionmentioning

confidence: 99%

Studies on adsorptive interaction between natural fiber and coupling agents

Singh

Verma

Gupta

1998

J. Appl. Polym. Sci.

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Efficacy evaluation of various coupling-agent-treated sisal fibers was made by contact angle measurements and Fourier transform infrared spectroscopy. It was found that high contact angle and reduced hydroxyl groups on titanate-treated fibers favor its better hydrophobicity over the other treatments. The presence of adsorbed layer of coupling agent on the fiber surface was ascertained by appearance, shifting, and decreased intensity of absorption bands. The lowest polar component of surfacefree energy for N-substituted methacrylamide-treated fiber indicates the formation of ordered layers of its organofunctionality at the surface. The reason for enhanced interaction between sisal fiber and N-substituted methacrylamide is suggested by the formation of hydrogen bond, besides extracting a surface-active proton from the fiber surface by alkoxy group to form a covalent bond. An optimum treating condition of fiber for effective adsorptive interaction has been reported. The deposition of compound in the form of an aggregate on the fiber surface was also observed under scanning electron microscopy.

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“…Desse modo, normalmente as interfaces fibra -matriz desenvolvidas são fracas, resultando em uma transferência de tensões não efetiva para as fibras. Inúmeros tratamentos físicos e químicos têm sido desenvolvidos para melhorar essa característica e, portanto, aumentar o desempenho dos compósitos fabricados com fibras naturais [14][15][16][17][18] . No caso da bucha, tratamentos alcalinos mostraram a possibilidade de melhorar a interface fibra-matriz, embora a melhora obtida não tenha sido significativa [12] .…”

Section: Introductionunclassified

Acetilação da fibra de bucha (Luffa cylindrica)

et al. 2005

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IntroduçãoO emprego de compósitos de matriz polimérica reforça-dos por fibras naturais lignocelulósicas vem tendo um crescente desenvolvimento nos últimos anos [1][2][3] . Os grandes atrativos desses materiais incluem o fato das fibras serem biodegradáveis, serem um recurso natural renovável, terem geralmente baixo custo e produzirem menor desgaste nos equipamentos de fabricação quando comparadas com as fibras sintéticas. Dentre as principais fibras vegetais mais estudadas e empregadas em nível mundial como reforço em compósitos de matriz polimérica, destacam-se o sisal e a juta [4,5] . Na Europa, estão sendo aplicados pesados investimentos para o emprego de fibras nativas como o linho e o cânhamo [3] . Entretanto, inúmeras outras fibras vegetais mostram potencialidade de aplicação como reforço em compósitos de matriz polimérica. As fibras de bananeira, por exemplo, são abundantes, tendo uma produção mundial estimada superior a 300.000 toneladas/ ano, além de serem baratas e terem boas propriedades mecâ-nicas [6,7] . Outras fibras que podem ser destacadas são as de coco, rami, piaçava e bucha [7][8][9][10][11][12] . A Luffa cylindrica, vulgarmente conhecida como bucha, é uma planta subtropical, abundante na China, Japão Resumo: Neste trabalho, foi analisado o efeito de um tratamento químico, ou seja, de acetilação de grupos, sobre a estrutura e a morfologia superficial de fibras de bucha (Luffa cylindrica) por meio de FTIR e microscopia eletrônica de varredura. Esse tratamento foi realizado tendo por objetivo aumentar a compatibilidade da bucha com as matrizes poliméricas usualmente empregadas em compósitos. Mostrou-se que o tratamento reduziu a polaridade das moléculas de celulose e removeu a camada superficial das fibras de bucha, expondo a sua estrutura fibrilar interna, com conseqüen-te aumento da área disponível para a adesão. Palavras-chave: Luffa cylíndrica, tratamento superficial, compósitos. Acetylation of Loofah Fiber (Luffa Cylindrica)Abstract: In this work the effect of a new chemical surface treatment on the structure and surface morphology of loofah fibers (Luffa cylindrica) was analyzed, using infrared spectroscopy and scanning electron microscopy. The chemical treatment is aimed at increasing loofah compatibility with the polymeric matrices commonly used in composites. It was shown that the treatment used caused a reduction on the polarity of cellulose molecules, and removed the outer surface layer of loofah fibers, exposing their internal fibrillar structure. As a consequence the treatment promoted an increase on the surface area available to adhesion. Keywords: Luffa cylindrica, surface treatment, composites.Autor para correspondência: José R. M. d'Almeida, Departamento de Ciência dos Materiais e Metalurgia, PUC-Rio, Rua Marquês de São Vicente 225, CEP: 22453-900, Rio de Janeiro, RJ. E-mail: dalmeida@dcmm.puc-rio.br e em outros países da Ásia, bem como em países da Amé-rica Central e do Sul. Sua fruta tem uma sistema vascular que, quando seca, forma uma manta tridimensional natural [11,13] . A ...

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Composites of glass/modified jute fabric and unsaturated polyester resin

Cited by 101 publications

References 6 publications

Dynamic mechanical analysis and crystalline analysis of hemp fiber reinforced cellulose filled epoxy composite

Dynamic mechanical analysis and crystalline analysis of hemp fiber reinforced cellulose filled epoxy composite

Studies on adsorptive interaction between natural fiber and coupling agents

Acetilação da fibra de bucha (Luffa cylindrica)

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