| .甲壳胺和卡拉胶在溶液中的反应及其复合物性质[J].中国海洋药物,1994,13(1):19-23. |
| 甲壳胺和卡拉胶在溶液中的反应及其复合物性质 |
| STUDY ON THE REACTION OF CHITOSAN WITH CARRAGEENAN IN SOLUTION AND THE CHARACTERISTCS OF THE COMPLEX |
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| DOI： |
| 中文关键词: 甲壳胺 卡拉胶 高聚物 |
| English Keywords:Chitosan,carrageenan,polyelectrolyte complexs (PEC) |
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| 中文摘要: |
| 甲壳胺与卡拉胶在溶液中反应生成不溶于水的沉淀。红外光谱分析及相反离子含量测定证明,甲壳胺和卡拉胶分子间的联结是通过甲壳胺分子中的—NH_3~+与卡拉胶分子中的—SO_3~-通过静电相互作用来实现的。形成的聚电解质复合物N/S摩尔比在较宽的范围内依赖于反应混合溶液组成比,pH值及甲壳胺的脱乙酰度。不同条件下形成的复合物具有不同的形戊结构,当甲壳胺分子与卡拉胶分子上的电荷密度接近时,扫描电镜观察到复合物呈现纤维状结构。复合物不溶于二甲亚砚,CH_3COCH_3/KBr/H_2O(20:20:60wt)三元溶剂,在加热时溶于浓甲酸和稀盐酸,且随甲壳胺脱乙酰度增加复合物的溶解性下降。此外,复合物具有一定的抗凝血性。 |
| English Summary: |
| Solutions of chitosan and carrageenan were co-reacted under various experimental conditions to form water-insoluble precipitates. DR. spectroscopic studies and the counter -ions analyses revealed that the combination of the polyions proceeded through the electrostatic interaction between the - NH+3 of chitosan and the - SO3 of carrageenan, and the mole retios of N/S in the poly-electrolyte complexes (PEC) thus prepared have large scope depending on pH, the degree of deacetyla-tion (DD) of chitosan as well as the mixin ratio of the complexing components. The observation of the PEC by scanning electron microscopy showed that there exist fibrous structures in some PEC depending on such reactive conditions as pH, DD of chitosan related with the charge densities of chitosan chains. The solubility of PEC, which is greatly affected by the DD of chitosans, and the blood compatibility have also been studied. |
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