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An in-depth study of molecular and supramolecular structures of bamboo cellulose upon heat treatment.
Carbohydrate Polymers ( IF 10.7 ) Pub Date : 2020-05-11 , DOI: 10.1016/j.carbpol.2020.116412
Qiuqin Lin 1 , Yuxiang Huang 1 , Wenji Yu 1
Affiliation  

In this study, two methods including a common method using high concentration of alkali solution and a mild extraction method at ambient conditions were used to extract cellulose from bamboo. The results showed that two methods affected the initial state of the cellulose. Celluloses obtained by the former was a hybrid of cellulose I and II while the latter was pure cellulose I. However, their heat treatment results indicated that the heat treatment (≤200 °C) would not change the aggregation structure of bamboo cellulose, but it will cause the change of intramolecular and intermolecular hydrogen bonds, and the break of glycosidic bonds in the amorphous region and part of the crystalline region of cellulose. Accordingly, the crystallinity of bamboo cellulose will decrease slightly after heat treatment. Finally, the macroscopic morphology change of bamboo cellulose caused by heat treatment was the thermal expansion in the width direction instead of distort.



中文翻译:

热处理后竹纤维素分子和超分子结构的深入研究。

在这项研究中,使用了两种方法,包括使用高浓度碱溶液的普通方法和在环境条件下的温和提取方法,以从竹子中提取纤维素。结果表明,两种方法影响纤维素的初始状态。前者获得的纤维素是纤维素I和II的杂种,后者则是纯纤维素I。但是,他们的热处理结果表明,热处理(≤200°C)不会改变竹纤维素的聚集结构,但是会导致分子内和分子间氢键的变化,以及纤维素无定形区域和部分结晶区域中糖苷键的断裂。因此,竹纤维素的结晶度在热处理后会稍微降低。最后,

更新日期:2020-05-11
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