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以十二醇为相变基元,通过真空浸渍、常压浸渍和超声浸渍等3种工艺使木粉的多孔腔体吸附十二醇,再与聚丙烯共混,制备出十二醇/木塑复合相变材料。通过力学性能测试、差示扫描量热和循环性能分析,研究了不同浸渍工艺对木粉吸附相变剂及复合相变材料综合性能的影响。结果表明:超声浸渍工艺负载十二醇的含量比常压的提高了9.6%,比真空的提高了2.2%。超声处理木粉有利于提高木塑复合相变材料的力学性能,超声浸渍处理后制备的材料相变焓比常压浸渍的提高了6.21J/g。循环测试结果表明,常压浸渍的材料相变焓损失率达到69.17%,而超声浸渍和真空浸渍分别为11.93%和14.97%。
With dodecanol as the phase change element, dodecyl alcohol / wood was prepared by three processes: vacuum impregnation, pressure impregnation and ultrasonic impregnation. Plastic composite phase change material. Through the mechanical properties test, differential scanning calorimetry and cycle performance analysis, the impact of different impregnation process on the comprehensive performance of wood powder adsorption phase change agent and composite phase change material was studied. The results showed that the content of dodecanol in the ultrasonic impregnation process was increased by 9.6% over the normal pressure and 2.2% higher than the vacuum. The ultrasonic treatment of wood flour is beneficial to improve the mechanical properties of WPC. The enthalpy of phase transition prepared by ultrasonic immersion treatment is 6.21 J / g higher than that of atmospheric pressure impregnation. The cyclic test results show that the enthalpy loss of phase transformation under atmospheric pressure is 69.17%, while the ultrasonic impregnation and vacuum impregnation are 11.93% and 14.97% respectively.