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首页> 外文期刊>Journal of Polymers and the Environment >Utilization of Cellulosic Wastes in Textile and Garment Industries: 2. Synthesis and Characterization of Cellulose Acetate from Knitted Rag
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Utilization of Cellulosic Wastes in Textile and Garment Industries: 2. Synthesis and Characterization of Cellulose Acetate from Knitted Rag

机译：在纺织和服装行业中纤维素废料的利用：2.针织碎布中醋酸纤维素的合成和表征

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摘要

Cellulose acetate (CA) was synthesized from knitted rag, a cellulosic waste of Textile and Garment industries, in the glacial acetic acid, and subsequently acetic anhydride (A_(c2)O) in presence of concentrated H_2SO_4 reaction medium. A low to high substitution products were obtained from single step up to seven steps acetylation of cellulose. In this way, it was possible to produce low cost and different grades or substituted acetylation derivatives of cellulose. The synthesized CA was characterized and investigation of its physical characteristics was done. Solubility, acetyl content, acetic acid content, degree of substitution, and molecular weight of CA increased gradually with the increase of the number of reaction steps attaining optimum value at the fourth step. The acetyl and acetic acid content of CA were increased from 39.95 % to 44.25 %, and from 55.73 % to 61.73 % respectively. Similarly, degree of substitution and molecular weight of CA were increased from 2.47 to 2.94, and from 74,249 to 121,437 respectively.
机译：醋酸纤维素（CA）是由针织抹布（一种纺织和制衣业的纤维素废料）在冰醋酸中合成的，然后在浓H_2SO_4反应介质存在下，由乙酸酐（A_（c2）O）合成的。从纤维素的单步至七步乙酰化可得到低至高取代的产物。以此方式，可以生产低成本和不同等级的纤维素或取代的乙酰化衍生物。表征了合成的CA，并对其物理特性进行了研究。 CA的溶解度，乙酰基含量，乙酸含量，取代度和分子量随第四步反应达到最佳值而增加。 CA的乙酰基和乙酸含量分别从39.95％增加到44.25％，并且从55.73％增加到61.73％。类似地，CA的取代度和分子量分别从2.47增加到2.94，并且从74,249增加到121,437。

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