壳聚糖半稀溶液性质的研究  

STUDY ON PROPERTIES OF SUBCONCENTRATED SOLUTION OF CHITOSAN

作　　者：傅晓琴[1,2] 刘海敏[1,2] 

机构地区：[1]华南理工大学材料科学与工程学院 [2]华南理工大学学报编辑部

出　　处：《华南理工大学学报（自然科学版）》1999年第5期115-120,共6页Journal of South China University of Technology(Natural Science Edition)

摘　　要：研究了壳聚糖乙酸半稀溶液的性质．结果表明，壳聚糖乙酸半稀溶液的零切粘度η０随乙酸含量的增加、壳聚糖含量的减少、温度的升高、放置时间的延长而减小．流动活化能ΔＥη和结构粘度指数Δη随壳聚糖含量的增加、乙酸含量的减少而增大．在溶液中添加ＮａＣｌ将使溶液粘度增大，添加脲将使溶液粘度减小．溶液的稳定性随放置时间的延长而降低。The properties of subconcentrated solution of chitosan are studied by using acetic acid aqueous solution as solvent. The results show that the zero shear viscosity η 0 of the solution decreases with the increase of acetic acid content and temperature, the decrease of chitosan content and the prolonging of the storage time, that flow activation energy (Δ E η) and structural viscosity index (Δη) increase with the increase of chitosan content and the decrease of acetic acid content,that the addition of NaCl to the solution leads to the increase of viscosity, but the addition of urea leads to the contrary, and that the stability of the solution decreases with the prolonging of the storage time, but was not influenced clearly by adding NaCl or urea.

关 键 词：壳聚糖 粘度 流动活化能 溶液性质 半稀溶液性质 

分 类 号：O636.1[理学—高分子化学] O645.16[理学—化学]