Miscibility of chitosan/poly(ethylene oxide) blends and effect of doping alkali and alkali earth metal ions on chitosan/PEO interaction
Miscibility of chitosan/poly(ethylene oxide) blends and effect of doping alkali and alkali earth metal ions on chitosan/PEO interaction
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DOI：
10.1016/j.polymer.2011.03.044
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发表时间：
2011-05-26
期刊：
影响因子：
4.6
通讯作者：
Watanabe, Hiroshi
中科院分区：
文献类型：
--
作者：
Rakkapao, Natthida;Vao-soongnern, Visit;Watanabe, Hiroshi
研究了壳聚糖（CS）与聚氧化乙烯（PEO）共混体系的相容性以及K+和Ca ~（2+）掺杂对CS/PEO相互作用的影响。CS和PEO似乎是可混溶的，DSC分析表明Flory-Huggins相互作用参数chi（AB）为-0.21。在CS/PEO共混物基体中掺入K+和Ca ~（2+）增强了CS和PEO之间的协同作用，Ca ~（2+）的增强作用大于K+。Ca ~（2+）和K ~+之间的差异可能反映了Ca ~（2+）与CS的氨基、羟基以及PEO的醚基之间的多价相互作用较强，形成稳定的CS/Ca ~（2+）/PEO复合物，而K ~+的相互作用较弱。WAXD和FTIR结果。分子动力学模拟清楚地表明CS/PEO共混物基体中K+和Ca 2+的相互作用与动态行为之间的相关性。(C)2011爱思唯尔有限公司保留所有权利。
The miscibility of Chitosan (CS) and poly(ethylene oxide) (PEO) in their blends and the effect of K+ and Ca2+ doping on the CS/PEO interaction have been investigated in this work. CS and PEO appeared to be miscible and the DSC analysis suggested the Flory-Huggins interaction parameter chi(AB) to be -0.21. Doping of K+ and Ca2+ into the CS/PEO blend matrix enhanced the cooperative interaction between CS and PEO and this enhancement was larger for Ca2+ than for K+. The difference between Ca2+ and K+ possibly reflects a stronger multi-valence interaction of Ca2+ with the amino and hydroxyl groups of CS as well as the ether groups of PEO to form a stable CS/Ca2+/PEO complex and a less significant interaction of K+, as suggested by DSC. WAXD and FTIR results. MD simulations clearly indicated the correlation between the dynamic behavior and the interaction of K+ and Ca2+ in the CS/PEO blend matrix. (C) 2011 Elsevier Ltd. All rights reserved.