次亚磷酸钠对BTCA与棉纤维分步反应的催化机理  

Catalytic mechanism study about step-by-step reactions of sodium hypophosphite on BTCA and cotton cellulose

作　　者：纪柏林 孙刚 阎克路[1,3] 

机构地区：[1]东华大学化学化工与生物工程学院,上海201620 [2]加州大学戴维斯分校,加利福尼亚州95616 [3]东华大学国家染整工程技术研究中心,上海201620

出　　处：《染整技术》2017年第6期21-25,共5页Textile Dyeing and Finishing Journal

基　　金：国家科技支撑计划资助项目(2012BAE11G00)

摘　　要：设计新的试验条件,深入研究了棉织物丁烷四羧酸(BTCA)免烫整理的交联机理和次亚磷酸钠(SHP)的催化机理。通过FTIR、热重分析和Gaussian计算等手段进行分析,结果表明,Na+通过减弱BTCA分子间氢键作用使其成酐温度降低,而SHP阴离子通过移除反应中间体的质子促进了酸酐和纤维素的成酯反应;BTCA与纤维素的反应是一个分步成酐成酯的过程。By designing new experiment conditions, the crosslinking reactions mechanism of cotton wrinkle-free fin- ishing with butanetetracarboxylic acid （BTCA） was detailed investigated, as well as the catalytic mechanism of sodium hypophosphite （SHP）. FTIR, thermogravimetric analysis and Gaussian calculation were employed for the analyses. The re- suits indicated that Na＋ decreased the temperature of anhydride formation by weakening the intermolecular hydrogen bonds between BTCA molecules, and SHP anions promoted the esterification between anhydrides and cellulose by removing the protons of reaction intermediates. Besides, BTCA reacted with cellulose by a step-by-step process.

关 键 词：免烫 交联 成酐 分步反应 

分 类 号：TS195.2[轻工技术与工程—纺织化学与染整工程]