摘要
Abstract
[Objective] The reference for the industrial production of chitosan oligomer was provided through the experiment in its preparation of the natural chitosan, as raw material, degraded by hydrogen peroxide. [ Method] The factor affecting the chitosan-degrading such as its mass fraction, the mole rate of hydrogen peroxide to chitosan, the reaction temperature and time was optimized under the neutral condition. The molecular weight was measured with the method of gel permeation chromatograph and the structure was analyzed with IR spectrum analyzer. [Result] The idea hydrolyzation technology was established, under which condition of the mass fraction of chitosan: 12% , the reaction temperature: 60 ℃, the reaction time: 6 hours, the mole rate of hydrogen peroxide to chitosan: 4, the yield of chitosan oligomer was 73. 0%. The averaged molecular weight of it was 1 798. 1, the mean molecular weight was 2 986.6 and the dispersion degree of molecular weight was 1.66. Characterized by IR spectrum analysis, it was known that the structure of chitosan oligomer was same as the chitosan as raw material. [Conclusion] The technology was simple, practical, less consumption of raw material, non-pollution, which could be actively extended and used.关键词
壳聚糖/低聚壳聚糖/制备/工艺Key words
Chitosan/ Chitosan oligomer preparation/ Technology分类
农业科技
