Scanning electron microscopy study of chemically modified coir fibers

Rout, J.; Tripathy, S. S.; Nayak, Sanjay K.; Misra, Manjusri; Mohanty, Amar K.

doi:10.1002/1097-4628(20010214)79:7<1169::aid-app30>3.0.co;2-q

Cited by 128 publications

(67 citation statements)

References 15 publications

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“…Each unit cell of fibers was composed of small particles of cellulose surrounded and cemented together with lignin and hemicellulose. Similar observation was made in the case of some other ligno-cellulose fibers also (Rout et al 2001;Mwaikambo and Ansell 2002;Ouajaj et al 2004). Alkali treatment tends the fibers to react with the cementing material hemicellulose, and to increase the effective surface available for wetting by the resin when used in green composites.…”

Section: Resultssupporting

confidence: 74%

Structural characterization of coconut tree leaf sheath fiber reinforcement

Reddy

Maheswari

et al. 2010

Journal of Forestry Research

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The coconut palm tree leaf sheath fibers were analyzed by FTIR spectral analysis, Chemical, X-ray and thermo gravimetric methods to assess their suitability as reinforcements in the preparation of green composites. The morphology of the untreated and alkali treated fibers was studied by scanning electron microscopic method. The FTIR and chemical analyses indicated lowering of hemi-cellulose content by alkali treatment of the fibers. The X-ray diffraction revealed an increase in crystallinity of the fibers on alkali treatment. The thermal stability of the fibers was found to increase slightly by alkali treatment. The tensile properties of these fibers increased on alkali treatment. The mechanical and other physical properties indicated that these fibers were suitable as reinforcements for making the green composites.

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Section: Resultssupporting

confidence: 74%

Structural characterization of coconut tree leaf sheath fiber reinforcement

Reddy

Maheswari

et al. 2010

Journal of Forestry Research

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“…However, as noted by previous workers 15,16 , the slight intensity decrease of the band around 1514cm -1 suggests that some lignin can be removed by treatment with alkali. Vibrations in the region between 3000 and 2850cm -1 associated with C-H stretching of lignin, hemicellulose and cellulose decrease slightly upon alkalization 17 .…”

Section: Fig 1: Ftir Spetra Of Untreated Ubf and Alkali-treated Tsupporting

confidence: 57%

Short communication: Alkaline surface modification of banana stem fibres

Okieimen

Bakare²

2007

Nigerian Journal of Chemical Research

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“…na literatura, são encontrados vários estudos que foram conduzidos visando à incorporação de fibras de coco em novos materiais compósitos. Ressalta-se, entretanto, a grande predominância dos estudos voltados para uso de fibras de coco maduro (Rout et al, 2001a;Rout et al, 2001b;Silva et al, 2006;Rozman et al, 2000).…”

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Composição química, propriedades mecânicas e térmicas da fibra de frutos de cultivares de coco verde

et al. 2009

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RESUMO-o consumo da água de coco verde, in natura ou industrializada, vem gerando um grande problema ambiental, devido ao destino final da casca dos frutos. Aproximadamente 85% do peso bruto do coco verde é constituído pelas cascas, que são acumuladas em lixões ou às margens de estradas. Como a minimização da geração desse resíduo implicaria a redução da atividade produtiva associada, o seu aproveitamento tornase uma necessidade. Neste sentido, este estudo teve como objetivo investigar as características da fibra de coco verde de diversos cultivares em função do ponto de colheita dos frutos, na composição química, nas propriedades mecânicas e térmicas, como forma de contribuir para avaliar seu potencial de aplicação na elaboração de novos materiais. Os resultados mostraram que a variação da composição química em função da cultivar de coco verde foi na faixa de 37,2 ± 0,8% a 43,9±0,7% e de 31,5±0,1% a 37,4±0,5% para os teores de lignina e celulose, respectivamente. A composição química não variou significativamente em função do ponto de maturação para a fibra da cultivar Anão-Verde-de-Jiqui (AVeJ). A fibra de cultivares de coco verde e AVeJ em diferentes pontos de maturação apresentaram propriedades térmicas e mecânicas semelhantes, as quais são próximas das propriedades das fibras de coco maduro, demonstrando, portanto, um potencial equivalente para serem utilizadas como reforço em matrizes poliméricas. Termos para indexação:Cocos nucifera, caracterização de frutos, ponto de maturação, fibras de coco verde. CHEMICAL COMPOSITION, THERMAL AND MECHANICAL PROPERTIES FOR CULTIVARS OF IMMATURE COCONUT FIBERSABSTRACT -The consumption of water of green coconut in natura or industrialized has generated a large amount of residues that are disposed in landfills or in roadside. The husks residues correspond to around 85% of the weight of the fruit and present slow decomposition process. This environmental problem requires alternative solutions. In order to assessing to potential of the immature (green) coconut fibers to be used as reinforcement material in polymer matrices, the chemical composition, thermal and mechanical characteristics of the coconut fibers originated from 5 immature coconut cultivars of the Nana variety at 4 different ages were studied. According to the results obtained, the change of the chemical composition with the cultivar was from 37.2 ± 0.8% to 43.9±0.7% and from 7.4±0.5% to 31.5±0.1% for lignin and cellulose contents, respectively. The age did not significantly influence the chemical composition of 'Anão Verde de Jequi' (AVeJ) cultivar. All the cultivars and AVeJ, in different ages showed approximately the same thermal and mechanical behaviors, which were similar to the mature coconut fiber properties. This study shows that the immature cultivars studied offer potential to be used as reinforcement in composites similarly to mature coconut fiber.

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Scanning electron microscopy study of chemically modified coir fibers

Cited by 128 publications

References 15 publications

Structural characterization of coconut tree leaf sheath fiber reinforcement

Structural characterization of coconut tree leaf sheath fiber reinforcement

Short communication: Alkaline surface modification of banana stem fibres

Composição química, propriedades mecânicas e térmicas da fibra de frutos de cultivares de coco verde

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