两性瓜尔胶水溶液浓度对其动态黏弹和触变性能的影响  

Effects of Concentrations of Aqueous Amphoteric Guar Solutions on Their Dynamic Viscoelastic and Thixotropic Properties

作　　者：汪丽[1] 张黎明[1] 

机构地区：[1]中山大学化学与化学工程学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2006年第3期43-45,共3页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(3047047620273086);广东省科技厅科学基金资助项目(0391842004B33101003)

摘　　要：采用ARES先进流变扩展系统,考察了两性瓜尔胶溶液浓度对其动态黏弹及触变性能的影响。随两性瓜尔胶溶液浓度的提高,体系的储能模量(G′)、损耗模量(G″)及动态复数黏度(η*)随之增大,而有关动态损耗角(tanδ)则随之减少;相比之下,体系的弹性响应随浓度增强程度强于黏性响应。基于ARES瞬态操作模式,考察了不同浓度两性瓜尔胶溶液的触变性能,发现随浓度增加体系的触变性能增强。Effects of concentrations of aqueous amphoteric guar solutions on their dynamic viscoelastic and thixotropic properties were investigated by using an advanced rheometric expansion system （ARES）. With the increase of concentration of aqueous amphoteric guar solutions, their storage modulus, loss modulus and dynamic complex viscosity increased, while the dynamic loss tangent decreased. In contrast, the increase of the elastic response was stronger than that of the viscous response when the solution concentration increased. Based on the instantaneous measurements of ARES, the thixotropic property was investigated for aqueous amphoteric guar solutions with various concentrations. It was found that the thixotropic property was enhanced by increasing the solution concentration.

关 键 词：两性瓜尔胶衍生物 溶液流变性 黏弹性能 触变性能 

分 类 号：O636.1[理学—高分子化学]