壳聚糖锰(Ⅱ)配位与氧化控制降解寡糖的分子量分布  

Formation of Mn(Ⅱ) with Chitosan and Molecular Weight Distribution of Oligosaccharides by Oxidating Degradation

作　　者：郝红元[1] 张岐[1] 葛庆凯[1] 

机构地区：[1]海南大学海南省精细化工重点实验室,海口570228

出　　处：《无机化学学报》2004年第9期1085-1088,共4页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20061001);国家高技术研究发展专项(No.2002AA629130);海南高校优秀中青年教师科研与教学奖励基金共同资助项目。

摘　　要：Complexes of chitosan with Mn(Ⅱ) were prepared by adding Mn(OAc)2·4H2O to Chitosan solution. IR, elemental analysis and TG analysis were used to character the complex. The results showed that there were coordinate bands formed. H2O2 was used to degrade chitosan-Mn(Ⅱ) complex, and the molecular distribution of degraded products were investigated after eliminating Mn(Ⅱ) ions using the cation exchange resin column. The result suggested that the Chitosan could be degraded rapidly, the degradation started from higher molecular weight range, the molecular weight distribution of oligosaccharides was much more narrower than that of degradated products from common methods such as hydrolysis, acidic and oxidizing methods. The index of molecular weight distribution was changed with the average degradability. When exceeding 10 oligosaccharides, the smaller of the DP, the smaller of the index.Complexes of chitosan with Mn(Ⅱ) were prepared by adding Mn(OAc)2·4H2O to Chitosan solution. IR, elemental analysis and TG analysis were used to character the complex. The results showed that there were coordinate bands formed. H2O2 was used to degrade chitosan-Mn(Ⅱ) complex, and the molecular distribution of degraded products were investigated after eliminating Mn(Ⅱ) ions using the cation exchange resin column. The result suggested that the Chitosan could be degraded rapidly, the degradation started from higher molecular weight range, the molecular weight distribution of oligosaccharides was much more narrower than that of degradated products from common methods such as hydrolysis, acidic and oxidizing methods. The index of molecular weight distribution was changed with the average degradability. When exceeding 10 oligosaccharides, the smaller of the DP, the smaller of the index.

关 键 词：壳聚糖 锰配合物 降解 寡糖 催化氧化 分子量分布 

分 类 号：O636.1[理学—高分子化学] O614.711[理学—化学]