Preparation and Properties of Polyacrylonitrile Fiber/Binary of Fatty Acids Composites as Phase Change Materials
Preparation and Properties of Polyacrylonitrile Fiber/Binary of Fatty Acids Composites as Phase Change Materials
复制标题
DOI：
10.1080/15567036.2010.518217
复制
发表时间：
2013-04
期刊：
影响因子：
--
通讯作者：
Jing Guo;H. Xiang;Qian Qian Wang-Qian-;Dinghong Xu
中科院分区：
文献类型：
--
作者：
Jing Guo;H. Xiang;Qian Qian Wang-Qian-;Dinghong Xu
采用溶液共混法制备了一种新型形态稳定的聚丙烯腈纤维/二元脂肪酸复合相变材料。该材料以不同组分的硬脂酸和月桂酸二元体系为潜热蓄热材料，聚丙烯腈为支撑材料，N，N-二甲基甲酰胺为溶剂。采用差示扫描量热法对聚丙烯腈/脂肪酸二元复合材料的相变温度、潜热及热稳定性进行了表征。采用傅里叶变换红外光谱仪、偏光显微镜、扫描电镜和温度记录仪研究了聚丙烯腈/脂肪酸二元复合材料的结构、结晶形态、表面形貌和保温性能。傅里叶红外变换结果表明，聚丙烯腈与二元脂肪酸通过分子间作用力结合。差示扫描量热分析结果表明，聚丙烯腈/二元脂肪酸复合材料具有较高的潜热储容量，其相变温度约为25℃，潜热储容量大于135.8 J/g。偏光显微镜和扫描电镜照片显示硬脂酸和月桂酸在聚丙烯腈基质中均匀分布；聚丙烯腈/脂肪酸二元复合材料的冷却曲线表明，其保温时间约为17.7 min，循环多次后保温性能保持不变。通过浸泡时间和正交试验确定了最佳工艺条件。
A new kind of form-stable polyacrylonitrile fiber/binary of fatty acids composites as phase change materials was prepared by a solution blending process. In this material, the binary system between stearic acid and lauric acid with different components was served as latent heat storage material and polyacrylonitrile as the supporting material, N,N-dimethylformamide as solvent. Phase change temperature and latent heat and the thermal stability of the polyacrylonitrile/binary of fatty acids composites were characterized using differential scanning calorimetry. The structure, crystalline morphology, surface morphology, and thermal insulation properties of the polyacrylonitrile/binary of fatty acids composites were investigated using Fourier transformation infrared spectroscope, polarizing optical microscopy, scanning electron microscope, and temperature-recording instrument. The Fourier transformation infrared results showed that polyacrylonitrile and binary of fatty acids were combined by intermolecular forces. The differential scanning calorimetry results indicated that polyacrylonitrile/binary of fatty acids composites had high latent heat storage capacity of more than 135.8 J/g, the phase transition temperature was about 25°C. The photograph of polarizing optical microscopy and scanning electron microscope suggested that stearic acid and lauric acid were homogeneous distribution in the polyacrylonitrile matrix; Cooling curve of polyacrylonitrile/binary of fatty acids composites showed that its soaking time was continued for about 17.7 minutes, and the thermal insulation properties remain unchanged after more than once cycling. The best process condition was obtained by the soaking time and orthogonal experiment.