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

Corradini, Elisângela; Rosa, Morsyleide de Freitas; Macedo, Bruno Pereira de; Paladin, Priscila D.; Mattoso, L. H. C.

doi:10.1590/s0100-29452009000300030

Cited by 50 publications

(39 citation statements)

References 16 publications

(13 reference statements)

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“…Cotton linter presented low levels of humidity, ash and lignin, whereas a high content of cellulose was reached. Based on these data and according to literature cotton linter can be assumed as a promising material to make the PCL compounds [16][17][18][19] . …”

Section: Mechanical Testsmentioning

confidence: 99%

“…Probably these properties are linked to a well dispersed cotton linter (fibrils) and cotton nanolinter (particles) within the PCL matrix (see SEM images in Figures 13 and 14). That was obtained due to appropriated processing conditions 16,[39][40] . Mechanical properties in flexion for PCL and its compounds with cotton linter and cotton nanolinter are showed in Figure 7.…”

Section: Mechanical Properties Evaluationmentioning

confidence: 99%

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Processing and Properties of PCL/Cotton Linter Compounds

et al. 2017

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Biodegradable compounds of poly(ε-caprolactone) (PCL)/ cotton linter were melting mixed with filling content ranging from 1% to 5% w/w. Cotton linter is an important byproduct of textile industry; in this work it was used in raw state and after acid hydrolysis. According to the results of torque rheometry no decaying of viscosity took place during compounding, evidencing absence of breaking down in molecular weight. The thermal stability increased by 20% as observed in HDT for PCL/cotton nanolinter compounds. Adding cotton linter to PCL didn't change its crystalline character as showed by XRD; however an increase in degree of crystallinity was observed by means of DSC. From mechanical tests in tension was observed an increase in ductility of PCL, and from mechanical tests in flexion an increase in elastic modulus upon addition of cotton linter, whereas impact strength presented lower values for PCL/cotton linter and PCL/cotton nanolinter compounds. SEM images showed that PCL presents plastic fracture and cotton linter has an interlacing fibril structure with high L/D ratio, which are in agreement with matrix/fibril morphology observed for PCL/cotton linter compounds. PCL/cotton linter compounds made in this work cost less than neat PCL matrix and presented improved properties making feasible its commercial use.

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Section: Mechanical Testsmentioning

confidence: 99%

Section: Mechanical Properties Evaluationmentioning

confidence: 99%

Processing and Properties of PCL/Cotton Linter Compounds

et al. 2017

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“…Segundo Corradini et al (2009), a fibra do coco verde por ser constituído de carboidratos como lignina e celulose, podem ser utilizadas na obtenção de açúcares fermentáveis (monossacarídeos) para a preparação de etanol lignocelulósico.…”

Section: Coco Descartado: Possibilidades De Reaproveitamentounclassified

Reaproveitamento Da Casca De Coco Verde

Silva

2014

REMOA

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ResumoA grande geração de resíduo proveniente do uso cotidiano de coco verde (Coccus nucifera L.), necessita de estratégias para evitar poluição visual e contaminações. Devido a seu peso e volume quando descartado, seja na forma oca (fechado, sem água) ou na forma de casca (aberta em bandas), diminui o tempo de vida dos aterros e lixões. Uma possibilidade seria o reaproveitamento da casca (mesocarpo fibroso) como produto artesanal, industrial ou insumo agrícola. Algumas classes de solos do Brasil necessitam de insumos como prática de manejo, e o uso da casca (fibra) é uma possibilidade. Embora o teor de lignina e celulose dificultem a degradabilidade dessa fibra no solo, ainda assim pode ser incorporada, consorciado com outros substratos, para fornecimento de nutrientes e melhora dos parâmetros físicos. O aproveitamento deste resíduo em projetos de agricultura familiar pode estimular a inclusão social, além de gerar trabalho e renda, principalmente nas cidades praianas.Palavras-chave: Fibra de coco. Resíduo. Sustentabilidade. AbstractThe great and daily generation of waste from use of coconut (Coccus nucifera L.), requires strategies to prevent visual pollution and contamination. Due to the weight and volume when discarded is in hollow form (closed, no water) or in the form of coconut shell (open in bands), decreases the lifetime of landfills and dumps. One possibility would be the reclamation of shell (mesocarp fiber) like a handmade and industrial products or agricultural input. Some classes of Brazilian soils need a way of management. Although the lignin and cellulose hinder the degradability of fiber in soil still is indicated for nutrient supply in associated with other substrates and can also be incorporated for lowlands improving its physical parameters. The use of this coconut residual in agriculture family projects can stimulate social inclusion, besides generating employment and income, especially in beach cities.

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“…Coconut fiber is obtained after the greencoconut shell is ground, and the powder is obtained after pressing and separation of the fibers. These wastes are rich in lignin and cellulose, with lignin content ranging from 37.2±0.8% to 43.9±0.7% and cellulose from 31.5±0.1% to 37.4±0.5% (Corradini et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Nutritional value of whole coconut, coconut powder, and coconut fiber treated with sodium hydroxide for sheep

et al. 2016

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The growing consumption of green coconut -fresh and industrialized -in Brazil generates a large volume of wastes and coproducts that justifies the search for alternatives for their use in animal feeding. The most limiting factor to the inclusion of these coproducts in ruminant diets is their high fiber content, which may restrict intake and performance. The present study determined the composition and in vitro dry matter degradability of whole coconut, coconut powder, and coconut fiber treated with sodium hydroxide (0%, 3%, and 6%) and the effect of including whole coconut hydrolyzed with 6% sodium hydroxide at different concentrations (25%, 30%, 35%, and 40%) in the diet on apparent digestibility of nutrients, performance, and feeding behavior of sheep. Alkalinization decreased the hemicellulose, NDF, and ADF contents of the evaluated coproducts. Whole coconut and coconut powder provided greater in vitro degradation of DM compared with coconut fiber, with highest values obtained with the inclusion of 6% sodium hydroxide. Inclusion of whole coconut in the diets did not affect the intakes of DM, CP, NDF, and ADF, but influenced weight gain, feed conversion, and apparent digestibility of DM and NDF. Regarding the feeding behavior of the animals, the inclusion of whole coconut in the diet only affected their rumination time. Whole coconut hydrolyzed with 6% NAOH can be included in diets for feedlot sheep at up to 35% without reducing intake or weight gain.Index terms: Cocos nucifera; NaOH; coproduct. RESUMOAvaliou-se a composição química e a degradação in vitro da matéria seca do coco integral, do pó de coco e da fibra de coco tratados com hidróxido de sódio (NaOH) e o efeito da inclusão do coco integral hidrolisado com 6% de NaOH sobre a digestibilidade aparente dos nutrientes, o desempenho e o comportamento ingestivo em ovinos -0%, 3% e 6% -e o efeito da inclusão do coco integral hidrolisado com 6% de hidróxido de sódio em diferentes concentrações na dieta -25%, 30%, 35% e 40% -sobre a digestibilidade aparente dos nutrientes, o desempenho e o comportamento ingestivo, em ovinos. A alcalinização diminuiu os teores de hemicelulose, FDN e FDA dos coprodutos avaliados. O coco integral e o pó de coco apresentaram maior degradação in vitro da MS em relação a fibra de coco, com maiores valores obtidos com a inclusão de 6% de hidróxido de sódio. A inclusão de coco integral nas dietas não afetou o consumo de MS, de PB, de FDN e de FDA, mas influenciou o ganho de peso, a conversão alimentar e a digestibilidade aparente da MS e da FDN. Quanto ao comportamento ingestivo dos animais, só houve efeito de inclusão do coco integral na dieta sobre o tempo de ruminação. O coco tratado com 6% de NaOH pode ser utilizado em até 35% na dieta de ovinos, pois não reduz o consumo e o ganho de peso desses animais.

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

Cited by 50 publications

References 16 publications

Processing and Properties of PCL/Cotton Linter Compounds

Processing and Properties of PCL/Cotton Linter Compounds

Reaproveitamento Da Casca De Coco Verde

Nutritional value of whole coconut, coconut powder, and coconut fiber treated with sodium hydroxide for sheep

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