Rheological Properties of Konjac Glucomannan/SiO_2/Organic-Borate Gels

作     者：吴力立 张超灿 

作者机构：Department of Polymer Materials and EngineeringSchool of Material Sciences and EngineeringWuhan University of Technology 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2009年第24卷第4期

页      面：575-580页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：Funded by Chinese Natural Science Foundation Committee(No.50673080) 

主　　题：konjac glucomannan Si02 organic borate rheological properties 

摘      要：A series of thermoreversible konjac glucomannan gels crosslinked by organic borate were prepared. Required amount of hydrophilic SiO2 was added into the konjac glucomannan solutions before the crosslinking reaction, The gel network was formed through the crosslinking reaction between borate ions dissociated from organic borate and the cis-diol hydroxyl groups on the mannose units of polysaccharide chains. The rheological properties of the complex gels were studied by dynamic viscoelastic measurement. The gelation kinetics of the complex gels was studied and the critical getation points of the gels were exactly determined by the Winter-Chambon criterion. The effects of temperature and composite ratio on the shear storage modulus （G＇）, the loss modulus （G＂） and the sol-gel transition points were investigated.