Miscibility of chitosan/poly(ethylene oxide) blends and effect of doping alkali and alkali earth metal ions on chitosan/PEO interaction

被引：56

作者：

Rakkapao, Natthida ^{[1
]}

Vao-soongnern, Visit ^{[1
]}

Masubuchi, Yuichi ^{[2
]}

Watanabe, Hiroshi ^{[2
]}

机构：

[1] Suranaree Univ Technol, LCAPS, Sch Chem, Inst Sci, Nakhon Ratchasima 30000, Thailand

[2] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

来源：

POLYMER | 2011年 / 52卷 / 12期

关键词：

Chitosan; Poly(ethylene oxide) (PEO); Blend; MOLECULAR-DYNAMICS; FORCE-FIELD; POLYMER; CRYSTALLIZATION; CONDUCTIVITY; COMPASS; FTIR; SIMULATIONS; TEMPERATURE; COMPLEXES;

D O I：

10.1016/j.polymer.2011.03.044

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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.

引用

页码：2618 / 2627

页数：10

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