Synthesis of Hydroxypropyl Guar Gum by Phase Transfer Catalysis
HGG (Hydroxypropyl guar gum) was synthesized by phase transfer catalysis for the first time. The effects of alkalinity, phase transfer catalyst, etherification, pH value, temperature,reaction time and stirring speed were investigated. An optimal synthetic reaction technology was established, namely, dose of guar gum is 100 g, propylene oxide 40-50 g, HTAC (hexadecyl trimethyl ammonium chloride ) 1.3-1.7 g, pH value 10-10.5, temperature 45-50℃, and reaction time 3-4 hours. The result shows that the improved HGG has high viscosity. Its dissolution speed, content of insoluble residue, colloid light transparency and stability are apparently superior to guar flour.
作 者： Rong Chun XIONG Ming Zhu CHANG Jian Ming CHEN Nan ZHOU Gang WEI 作者单位： Beijing University of Chemical Technology, Beijing 100029 刊 名： 中国化学快报（英文版） ISTIC SCI 英文刊名： CHINESE CHEMICAL LETTERS 年，卷(期)： 2005 16(4) 分类号： 关键词： Guar gum hydroxypropyl guar gum chemical modification phase transfer catalysis