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本文研究了脱乙酰甲壳质(CTS)的甲酸、乙酸以及甲、乙酸的异丙醇、乙醇、丙酮溶剂体系的溶液粘度及稳定性,并从溶液的稠度指数K和流动行为指数n来考察其增稠能力和溶液性质。实验表明,含有异丙醇和乙醇溶液的粘度,比不含有机溶剂的溶液的粘度高,而含有丙酮的则较低。有机溶剂的加入,对溶液的稳定性没有明显的影响,CTS甲酸系统的溶液比乙酸系统的溶液具有较好的稳定性。分子量为5.6×10~5CTS的增稠能力不及部分水解聚丙烯酰胺,但优于卡拉胶。CTS溶液属假塑性流体,其K值随溶液存放时间延长而下降,但n值上升,并接近于1。实验发现,抗氧剂维生素C不仅不能增加CTS溶液的稳定性,且对CTS有明显的促进降解作用。
In this paper, the solution viscosity and stability of formic acid and acetic acid of deacetylchitosan (CTS) and isopropanol, ethanol and acetone solvent system of acetic acid and acetic acid were investigated. The consistency and stability index of solvent solution were also investigated. Thickening ability and solution properties. Experiments have shown that the viscosity of solutions containing isopropanol and ethanol is higher than that of solutions without organic solvents and lower with acetone. The addition of organic solvent has no significant effect on the stability of the solution. The solution of CTS formic acid system has better stability than the acetic acid solution. The molecular weight of 5.6 × 10 ~ 5CTS thickening capacity is less than partial hydrolysis of polyacrylamide, but better than carrageenan. The CTS solution is a pseudoplastic fluid and its K value decreases as the solution storage time increases, but the n value rises and approaches 1. The experiment found that antioxidant vitamin C not only can not increase the stability of CTS solution, and CTS has a significant role in promoting degradation.