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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
A new kind of graft polymer chitosan-g-stearic acid with the characterization of solid-solid phase change was prepared.In the material,chitosan served as skeleton,and stearic acid with the characterization of solid-liquid phase change served as functional branch chains.The structure and phase change property of polymer were analyzed by FT-IR,DSC,SEM,XRD,POM and TG.The results showed that chitosan and stearic acid were combined by chemical bonds.During the transition,the polymer remained in the solid state.It had solid-solid phase transition property,and the polymer and stearic acid owned similar micro-morphologies.The endothermic and exothermic enthalpy of product were 21.33J/g(phase transition temperature of 60.5℃) and 14.03J/g(phase transition temperature of 47.11℃) respectively.The polymer exhibited the higher thermal stability,and the inflection point temperature was 233.11℃.
关键词
壳聚糖
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硬脂酸
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化学接枝
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固-固相变材料
Key words
chitosan
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stearic acid
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chemical grafting
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solid-solid phase change material
壳聚糖-g-硬脂酸固-固相变材料制备与表征[J].
化工新型材料, 2017, 45(9): 86-88 DOI:
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基金资助
辽宁省科技厅自然科学基金资助项目(2014026007)
