CAJ | 학술논문

以高密度聚乙烯(HDPE)作为包覆材料，石蜡作为相变材料，膨胀石墨或鳞片石墨作为导热增强剂，通过熔融共混和热压制备了不同石蜡用量的定形相变储能材料。通过实验分析了所制定形复合储能材料的相变温度、相变潜热、热导率等性能。石蜡经过高密度聚乙烯包覆之后，相变焓值下降30％左右(石蜡含量65％(质量分数))。膨胀石墨和鳞片石墨的加入均能提高复合材料的热导率。膨胀石墨含量为10％(质量分数)时，样品的热导率与无导热增强剂样品相比较提高率为594％，而相同质量分数的鳞片石墨热导率提高率仅为83％。由此可见膨胀石墨对复合材料热导率的贡献远远大于同等质量分数下鳞片石墨的贡献。
이고밀도취을희(HDPE)작위포복재료，석사작위상변재료，팽창석묵혹린편석묵작위도열증강제，통과용융공혼화열압제비료불동석사용량적정형상변저능재료。통과실험분석료소제정형복합저능재료적상변온도、상변잠열、열도솔등성능。석사경과고밀도취을희포복지후，상변함치하강30％좌우(석사함량65％(질량분수))。팽창석묵화린편석묵적가입균능제고복합재료적열도솔。팽창석묵함량위10％(질량분수)시，양품적열도솔여무도열증강제양품상비교제고솔위594％，이상동질량분수적린편석묵열도솔제고솔부위83％。유차가견팽창석묵대복합재료열도솔적공헌원원대우동등질량분수하린편석묵적공헌。
Form-stable phase change composites were prepared by melt blending and hot-compaction of paraffin, expanded graphite (EG)or flake graphite (FG)and high density polyethylene (HDPE).In the composites,par-affin served as a latent heat storage material,EG or FG as a heat transfer promoting agent and HDPE as a ma-trix.Phase transition temperatures,latent heat values and thermal conductivity values of the composites were measured.In order to prevent the leakage of melting paraffin in the composites,the minimum weight percent for HDPE was 35%.The latent heat of the composites increased with increasing mass ratio of the paraffin in the composites.EG and FG could improve thermal conductivity of the composites significantly.When the addition of EG was in the ratio of 10wt%,thermal conductivity of the PCM was up to 2.50 W/(m·K),more than 6 times of that without any additives,which was much better than that by addition of FG.