Effect of combined gamma-irradiation and alkali treatment on cotton–cellulose

Takács, Erzsébet; Wojnárovits, László; Földváry, Cs; Hargittai, P.; Borsa, Judit; Sajó, István E.

doi:10.1016/s0969-806x(99)00409-0

Cited by 107 publications

(57 citation statements)

References 2 publications

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“…In addition, its easy bio-degradability (Flaque et al, 2000;Takacs et al, 2000) is an added attraction for the environmentally conscious society. However, it suffers from drawbacks like inflammability, poor crease retention and is prone to bacterial and fungal attack.…”

Section: Introductionmentioning

confidence: 99%

Radiation-induced grafting of vinylbenzyltrimethylammonium chloride (VBT) onto cotton fabric and study of its anti-bacterial activities

Kumar

Bhardwaj

Rawat

et al. 2005

Radiation Physics and Chemistry

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Section: Introductionmentioning

confidence: 99%

Radiation-induced grafting of vinylbenzyltrimethylammonium chloride (VBT) onto cotton fabric and study of its anti-bacterial activities

Kumar

Bhardwaj

Rawat

et al. 2005

Radiation Physics and Chemistry

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“…Posterior al tratamiento, cuando la celulosa se lava con agua, esta recristaliza en una forma antiparalela para formar la celulosa tipo II [26]. Estos resultados de Botysiak y Doczekalska son concordantes con la reducción del 13% en la cristalinidad de la cascarilla de arroz encontrados en este trabajo; sin embargo, en el caso de la cascarilla no es probable que se haya presentado este cambio de estructura de la celulosa debido a que no se evidencia en el patrón de difracción de rayos X los picos característicos de celulosa tipo II correspondiente al plano 2θ = 12,1º y 22º [27]. Esto se explica debido a que se ha observado que la transición polimórfica de la celulosa se presenta con tratamientos de NaOH a concentraciones superiores al 11% [26][27] lo que hace que los resultados de Botysiak y Doczekalska sean atípicos.…”

Section: Discussionunclassified

Evaluación de pretratamientos químicos sobre materiales lignocelulósicos

Jaramillo

Vélez

Díaz

2017

Ingeniare. Rev. chil. ing.

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RESUMENLa eficiencia de la producción de etanol a partir de materiales lignocelulósicos depende en alto grado de la remoción de lignina, la que limita la hidrólisis de la celulosa y la posterior fermentación. En este trabajo se determinó el efecto de diferentes pretratamientos químicos sobre la composición química y cristalinidad en los materiales lignocelulósicos, aserrín de madera, bagazo de caña y cascarilla de arroz. Los pretratamientos evaluados se llevaron a cabo aplicando ácido sulfúrico o hidróxido de sodio o la combinación de ambos sobre el material. Con la aplicación del pretratamiento combinado genera las mayores remociones de lignina. Para bagazo de caña se obtuvo una remoción de lignina del 80,6%, mientras que para aserrín y cascarilla de arroz la remoción fue del 46,7%. Sin embargo, se observó una pérdida apreciable de celulosa, del 30,7% para el bagazo y 15,58% para la cascarilla. El análisis por difractometría de rayos X, reveló un incremento de la cristalinidad para el aserrín y el bagazo de caña.Palabras clave: Remoción de lignina, bagazo de caña, cascarilla de arroz, aserrín, difractometría de rayos X. ABSTRACT The efficiency in ethanol production

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“…In an investigation about the effects of chemical treatment (with alkali) and gamma radiation on cotton fibers, structural modification of cellulose component was evidenced by a decrease in the degree of polymerization and an increase in carbonyl content [16]. In an other investigation, irradiated cellulose fibers (by using gamma rays) showed degradation from 6 to 12% up to an applied dose of 31.6 kGy; moreover, crystallinity decrease for dosages higher than 300 kGy and finally diminution of 1% in the crystallinity at dosages up to 1 MGy are observed.…”

Section: Recycling and Reuse Of Textile Wastementioning

confidence: 99%

Waste and Recycled Textiles as Reinforcements of Building Materials

Pichardo¹,

Martínez-Barrera²,

López³

et al. 2018

Natural and Artificial Fiber-Reinforced Composites as Renewable Sources

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Currently, the use of composite materials in the construction areas has had a great impact on the society; mainly, those related with sustainability and environment aspects. Daily proposals aimed at overcoming the properties of traditional materials that arise, which include emergent materials either from waste or recycled products. One of them is related to the textile materials, which include fibers such as wool, hemp, linen, and cotton. In the past decade, special attention has been focused on the used clothes, which represent a source of raw materials environmentally responsible and economically profitable. Textile materials are discarded daily around the world, representing approximately 1.5% of the generated waste. Blue jeans are the most used clothing in the world, and they are elaborated by one of the most commonly used natural textile fiberscotton. Textile materials have been reused in different applications, for example, in the production of poor-quality wires, crushed to manufacture noise and temperature insulation materials, and as fillers or reinforcements of concrete. In this chapter, different topics are described that include: (a) environmental impact of textile waste-a result of massive consumption of clothing, (b) recycling and reuse of textile waste, and (c) waste and recycled textile materials used as building materials.

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Effect of combined gamma-irradiation and alkali treatment on cotton–cellulose

Cited by 107 publications

References 2 publications

Radiation-induced grafting of vinylbenzyltrimethylammonium chloride (VBT) onto cotton fabric and study of its anti-bacterial activities

Radiation-induced grafting of vinylbenzyltrimethylammonium chloride (VBT) onto cotton fabric and study of its anti-bacterial activities

Evaluación de pretratamientos químicos sobre materiales lignocelulósicos

Waste and Recycled Textiles as Reinforcements of Building Materials

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