壳聚糖-g-硬脂酸固-固相变材料制备与表征

发布时间：2018-04-20 06:11

  本文选题：壳聚糖 + 硬脂酸　； 参考：《化工新型材料》2017年09期

【摘要】：采用化学接枝的方法将具有固-液相变性能的硬脂酸接枝到壳聚糖高分子链上,制得一种具有固-固相变性能的新型高分子相变材料:壳聚糖-g-硬脂酸固-固相变材料,并采用傅里叶变换红外光谱(FT-IR)、差示扫描量热仪(DSC)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、偏光热台显微镜(POM)和热失重分析仪(TG)等对接枝产物进行了表征。结果表明,硬脂酸通过化学键连接在壳聚糖分子链上;壳聚糖-g-硬脂酸固-固相变材料呈现出可逆的固-固相转变特性,且具有与硬脂酸相似的结晶结构,吸热焓值为21.33J/g(相变温度为60.5℃),放热焓值为14.03J/g(相变温度为47.11℃),具有良好的热稳定性,热失重拐点温度为233.11℃。
[Abstract]:The stearic acid with solid-liquid phase change property was grafted onto chitosan polymer chain by chemical grafting method, and a new polymer phase change material: chitosan -gstearic acid solid-solid phase change material was prepared. The grafted products were characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimeter (DSC), scanning electron microscope (SEM), scanning electron microscope (SEM), polarizing thermostat microscope (POM) and thermogravimetric analyzer (TG). The results show that stearic acid is connected to chitosan chain by chemical bond, and chitosan-g-stearic acid solid-solid phase transition material exhibits reversible solid-solid-solid-state transition characteristics and has a crystalline structure similar to that of stearic acid, and the structure of stearic acid is similar to that of stearic acid. The endothermic enthalpy is 21.33 J / g (the transition temperature is 60.5 鈩，

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