物理化学学报 >> 2002, Vol. 18 >> Issue (06): 554-557.doi: 10.3866/PKU.WHXB20020617

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壳聚糖-盐酸溶液中温度敏感的相分离行为

吴迪;蔡伟民   

  1. 哈尔滨工业大学环境科学与工程系，哈尔滨　150001
  • 收稿日期:2001-10-22 修回日期:2001-12-31 发布日期:2002-06-15
  • 通讯作者: 吴迪 E-mail:wu_di10@yahoo.com

The Precipitation of Temperature-sensitive in Chitosan-HCl Solution

Wu Di;Cai Wei-Min   

  1. Environment Science and Engineering Department, Harbin Institute of Technology, Harbin　150001
  • Received:2001-10-22 Revised:2001-12-31 Published:2002-06-15
  • Contact: Wu Di E-mail:wu_di10@yahoo.com

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摘要： 研究了壳聚糖盐酸溶液温度敏感的相分离行为.通过对壳聚糖-盐酸溶液浊度变化的考察以确定相分离温度.测定不同盐酸浓度、壳聚糖浓度以及不同脱乙酰度的条件下的相分离温度，并用DLVO理论(Deijaguin-Landau and Verwey-Overbeck Theory)进行了解释. FTIR、X-ray以及SEM分别描绘了壳聚糖经相分离过程后官能团、结晶状态、颗粒形态的特点.

关键词: 壳聚糖, 盐酸, 相分离

Abstract: In this paper, we demonstrate the temperature-sensitive precipitation of chitosan in chitosan-HCl solution. The precipitation and precipitation temperature were determined by the change of turbidity of the solution. The precipitation was governed by the degree of deacylation of chitosan, the concentration of chitosan and that of HCl, these effects could be interpreted by the DLVO theory. After precipitation, amidogen of chitosan was combined with HCl, which was proved by FTIR and changed to be amorphous, which was proved by the X-ray diffraction .The SEM of precipitation showed the novel form of chitosan.

Key words: Chitosan, Hydrochloric acid, Precipitation