环氧氯丙烷交联黄原胶溶液的流变及抗温性能  

Rheological Properties and Temperature Resistance of Epichlorohydrin Crosslinked Xanthan Gum Aqueous Solutions

作　　者：杨婷婷[1] 李海平[1] 侯万国[1] 

机构地区：[1]山东大学胶体与界面化学教育部重点实验室,山东济南250100

出　　处：《高分子材料科学与工程》2015年第5期39-43,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21173135)

摘　　要：以环氧氯丙烷(EPC)为交联剂,在温和条件下"一锅法"制备了水溶性EPC交联黄原胶(XG),考察了交联度、Na Cl质量分数、p H和温度对EPC交联XG(c XG)溶液流变性的影响。结果表明,随交联度增大,c XG溶液黏度和动力学模量均明显增大,弹性增强;随Na Cl质量分数增大,溶液黏度和动力学模量均呈现先降低后增加趋势;p H在4~10范围内变化对体系流变性基本无影响;随温度升高,溶液黏度和动力学模量均降低,但与XG溶液相比,抗温性能明显提高。One-pot preparation of crosslinked xanthan gum( c XG) with epichlorohydrin was carried out under mild conditions. Effects of crosslinking degree,Na Cl concentration,p H and temperature on the rheological properties of c XG solutions were investigated. The results show that with increase of the crosslinking degree,both the viscosity and dynamic modulus of c XG solutions increase. As the Na Cl concentration increases,the viscosity and dynamic modulus of c XG solutions first decrease and then increase. p H within 4 ~ 10 almost doesn't influence the rheological properties of the solution. With increase of the temperature,the viscosity of c XG solutions decreases. The rheological properties of c XG solutions are similar with those of XG solutions,but the temperature resistance of c XG solutions is higher than that of XG solution.

关 键 词：黄原胶 环氧氯丙烷 交联 流变性 抗温性 

分 类 号：O631.2[理学—高分子化学]