Microencapsulated n-alkane with p(n-butyl methacrylate-co-methacrylic acid) shell as phase change materials for thermal energy storage
Microencapsulated n-alkane with p(n-butyl methacrylate-co-methacrylic acid) shell as phase change materials for thermal energy storage
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DOI：
10.1016/j.solener.2013.01.022
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发表时间：
2013-05
期刊：
影响因子：
6.7
通讯作者：
Xiaolin Qiu;G. Song;Chu Xiaodong;Xuezhu Li;G. Tang
中科院分区：
文献类型：
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作者：
Xiaolin Qiu;G. Song;Chu Xiaodong;Xuezhu Li;G. Tang
研究了以正构烷烃为相变储能材料的甲基丙烯酸正丁酯-甲基丙烯酸共聚物（P（BMA-co-MAA））微胶囊的制备与表征。用扫描电子显微镜（SEM）研究了纳米粒子的表面形貌、粒径大小及分布。采用傅里叶变换红外光谱（FTIR）对P（BMA-co-MAA）/正构烷烃微胶囊的化学性质进行了表征。采用差示扫描量热法（DSC）、热重分析法（TGA）和红外热像法研究了微胶囊化正构烷烃的热性能、热可靠性、热稳定性和调温性能。含正十八烷或石蜡的微胶囊具有较高的熔融和凝固相变速率（分别为130.3J/g和123.9J/g）。与相变材料相比，P（BMA-co-MAA）/正构烷烃微胶囊的失重温度显著提高。P（BMA-co-MAA）/正构烷烃微胶囊的相变速率在热循环后变化不大。热像分析表明，P（BMA-co-MAA）/正十八烷微胶囊复合石膏板具有调温性能。结果表明，所制备的微胶囊在建筑材料等方面具有良好的蓄热潜力。
This study deals with fabrication and characterization of p(n-butyl methacrylate-co-methacrylic acid) shell (P(BMA-co-MAA)) microcapsules containing n-alkane as phase change materials (PCMs) for thermal energy storage. The surface morphologies, particle sizes and distributions were studied by scanning electron microscopy (SEM). The chemical characterization of P(BMA-co-MAA)/n-alkane microcapsules was determined by Fourier transformed infrared (FTIR) spectroscopy. The thermal properties, thermal reliabilities, thermal stabilities and temperature-regulated property of the microencapsulated n-alkane were investigated by differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA) and infrared thermography. The microcapsules containing n-octadecane or a paraffin wax show high phase change enthalpies of melting (130.3J/g or 123.9J/g) and freezing (125.8J/g or 118.4J/g). The weight loss temperatures of the P(BMA-co-MAA)/n-alkane microcapsules were significantly increased compared with the raw phase change materials (PCMs). The phase change enthalpies of the P(BMA-co-MAA)/n-alkane microcapsules varied little after thermal cycles. Thermal images showed that the gypsum board with incorporated P(BMA-co-MAA)/n-octadecane microcapsules possessed temperature-regulated property. As a result, the as-prepared microcapsules show the good potentials for thermal energy storage, such as building materials.