纳米石墨粉改善定形相变复合纤维膜的储热和放热速率
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2017年闽江学院大学生创新创业训练计划省级项目(201710395027);国家自然科学基金青年科学基金资助项目(51706092);福建省自然科学基金青年创新项目(2018J05091);福建省高校杰出青年科研人才培育计划


Nano-Graphite Powder Improved Thermal Energy Storage and Release Rates of Form-Stable Phase Change Composite Fibrous Membranes
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    摘要:

    采用静电纺丝法制备了负载不同含量纳米石墨粉(NG)的聚丙烯腈(PAN)基复合纤维膜作为支撑材料,以癸酸-月桂酸-肉豆蔻酸(CA-LA-MA)三元低共熔物为固-液相变材料,通过物理吸附法制备CA-LA-MA/PAN/NG 定形相变复合纤维膜。分别采用傅里叶变换红外光谱仪、扫描电子显微镜、差示扫描量热仪和传热测试装置对定形相变复合纤维膜的化学性能、形貌结构、储热性能、热能储存和释放速率进行深入分析。研究结果表明,CA-LA-MA 三元低共熔物成功地被吸附到PAN基复合纤维膜中。制备的定形相变复合纤维膜的相变融化温度约为19 ℃,相变焓值约为114~131kJ/kg。由于添加了具有高导热系数的NG使定形相变复合纤维膜的热能储存和释放效率明显提高了43%和42%。

    Abstract:

    Electrospun polyacrylonitrile-based (PAN-based) composite fibrous membranes with different amount of nano-graphite powder (NG) were fabricated as supporting materials. The capric-lauric-myristic acid (CA-LA-MA) was selected as solid-liquid phase change materials. And then the CA-LA-MA/PAN/NG form-stable phase change composite fibrous membranes were prepared by physical adsorption method. Chemical property, morphological structure, thermal energy storage property, thermal energy storage and release rates of form-stable phase change composite fibrous membranes were systematically studied by FT-IR, SEM, differential scanning calorimetry (DSC) and thermal performance tester, respectively. Research results indicate that CA-LA-MA ternary eutectic is successfully adsorbed into the porous network structure of PAN-based composite fibrous membranes. Phase change melting temperature and enthalpies of form-stable phase change composite fibrous membranes are about 19 ℃ and 114~131 kJ/kg, respectively. And their thermal energy storage and release rates are obviously improved by about 43% and 42% due to addition of the NG with the high conductivity.

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邹雨航,柯惠珍,肖港归,路 宽,许芷薇.纳米石墨粉改善定形相变复合纤维膜的储热和放热速率[J].高分子材料科学与工程,2018,34(12):59-63.

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  • 在线发布日期: 2019-01-07
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