【摘要】 应用静态热机械分析(TMA)、差示扫描量热(DSC)和傅立叶转换红外光谱(FT-IR)研究了聚乙二醇(PEG)与壳聚糖(Chitosan)形成复合物的相变行为及分子间的相互作用。结果表明,当复合物中壳聚糖含量高于15%时,复合物表现出固态相转变行为;PEG与Chitosan间存在较强的分子间氢键,束缚和限制了复合物中PEG熔融态的平动自由,致使复合物在高温态下表现出固体化行为。更多还原

【Abstract】 Polyethylene glycol (PEG)/Chitosan composite phase change material prepared from acetic acid were studied with thermal analysis and Fourier transform infrared spectroscopy (FT-IR). The results show that when the chitosan fraction in the composite is higher than 15%, it exhibits solid-solid phase change behavior. FT-IR investigation illustrates that there is strong interaction between PEG and chitosan based upon intermolecular hydrogen bonds, which restricts the freedom of the transitional motion of the PEG within the composite at its melting point and makes it exhibit solidification phase behavior.更多还原