pH-response of chitosan, κ-carrageenan, carboxymethyl cellulose sodium salt complex hydrogels
pH-response of chitosan, κ-carrageenan, carboxymethyl cellulose sodium salt complex hydrogels
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DOI：
10.1016/j.polymer.2003.09.001
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发表时间：
2003-11
期刊：
影响因子：
4.6
通讯作者：
T. Mitsumata;Yuuki Suemitsu;Keiko Fujii;T. Fujii;T. Taniguchi;K. Koyama
中科院分区：
文献类型：
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作者：
T. Mitsumata;Yuuki Suemitsu;Keiko Fujii;T. Fujii;T. Taniguchi;K. Koyama
我们合成了由壳聚糖、κ-卡拉胶和羧甲基纤维素钠盐 (NaCMC) 组成的聚电解质复合水凝胶，并研究了凝胶的溶胀特性随卡拉胶/NaCMC 组成的变化。在较低组成的角叉菜胶中，获得了异质凝胶，表明这些聚电解质之间存在强静电相互作用。相反，在较高组成的角叉菜胶中，没有发生凝胶化。很明显，凝胶的均匀性很大程度上取决于角叉菜胶/NaCMC 组成。平衡时的溶胀程度与角叉菜胶组成成比例地降低。凝胶在 pH 11-12 范围内表现出最大程度的溶胀。最大溶胀度随着NaCMC组成的增加而不连续地降低，并且在NaCMC组成较高时与组成无关。在纯水和碱性溶液中的溶胀性能也受到每种聚电解质水溶液的盐浓度的影响。
We synthesized the polyelectrolyte complex hydrogel consisting of chitosan, κ-carrageenan, and carboxymethyl cellulose sodium salt (NaCMC) and investigated the swelling properties of the gel varying with carrageenan/NaCMC compositions. In a lower composition of carrageenan, heterogeneous gels were obtained indicating strong electrostatic interactions among these polyelectrolytes. Oppositely, in a higher composition of carrageenan, a gelation did not occur. It was cleared that a homogeneity of the gel strongly depended on the carrageenan/NaCMC composition. The degree of swelling at the equilibrium decreased proportional to the carrageenan composition. The gels showed a maximum degree of swelling in the range of pH 11–12. The maximum degree of swelling discontinuously decreased with increasing the NaCMC composition and was independent of the composition at a higher composition of NaCMC. Swelling properties in pure water and in alkaline solutions were also affected by salt concentrations of each polyelectrolyte aqueous solutions.