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%。
Lauryl alcohol/wood plastic composite phase change material was prepared by mixed polypropylene with wood flour that possessed the function of phase change through vacuum,atmospheric pressure and ultrasonic immersion making lauryl alcohol be adsorbed into the wood flour porous cavity.The effects of different immersion process on comprehensive performance of materials were studied through the mechanics performance test,differential scanning calorimetry (DSC) and cycle performance test.The results showed that the mount of lauryl alcohol absorbed into wood flour through ultrasonic immersion was increased by 9.6% than atmospheric pressure immersion,increased by 2.2% than vacuum immersion.The ultrasonic immersion benefited to improve the mechanical properties of composite.Phase-transition enthalpy of the material which was prepared by vacuum and ultrasonic immersion were increased 6.21J/g.The cycle test showed that the loss rate of phase-transition enthalpy of material which was dipped by atmospheric pressure immersion reached 69.17%,ultrasonic and vacuum immersion reached 11.93% and 14.97% respectively.
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基金资助
教育部新世纪人才支持计划(NCET-13-0710);国家自然科学基金(31570572)
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