Effect of Alkali Pretreatment on Selective Oxidation of Cotton Fiber by Sodium Periodate

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外文摘要：The contrast of the structure and properties of cotton fiber with or without alkali pretreatment oxidised selectively by sodium periodate was carried out。 The results showed that the cellulose crystals were gradually transformed from cellulose Ⅰ to cellulose Ⅱ as alkali treatment concentration range from 5wt% to 25wt%， and alkali pretreatment led to decrystallinity， which can improve the reactivity of cotton fiber with sodium periodate and increase in aldehyde content。 In the same oxidation process， the increasing of alkali concentration enhanced the degradation of the crystalline region of the oxidized samples。 However， proper alkali pretreatment can reduce the degradation of modified cotton fiber resulted from increasing oxidant concentration up to 32g/l， which possibly dues to formation of more hemiacetal structure and improving intermolecular hydrogen bonding in oxidant reaction after sodium hydroxide treatment， leading to enhancement the ordered structure。 Meanwhile， the breaking elongation of oxidized samples rapidly improved when increasing the alkali concentration above 10% at the same oxidation condition while the breaking strengthen of oxidized samples changed a little with increasing alkali concentration。

外文关键词：

cotton fiberalkali pretreatmentselective oxidationstructureproperties

作者：

YingLi、Wim Vanhaverbeke

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作者单位：

WANG Hao@School of Material Engineering, Soochow University, Suzhou 215021, P. R China--LIN Hong@School of Material Engineering, Soochow University, Suzhou 215021, P. R China--CHEN Yuyue@School of Material Engineering, Soochow University, Suzhou 215021, P. R China--

会议名称：

International Conference on Advanced Fibers and Polymer Materials;ICAFPM 2007

会议地点：

Shanghai(CN);Shanghai(CN)

会议母体文献：

Proceedings of 2007 International Conference on Advanced Fibers and Polymer Materials

页码：

764-767

出版时间：

2007