摘要
为了进一步拓宽相变材料的应用范围和使用价值，开发新型储能材料，采用“溶胶-凝胶”工艺制备出不同相变材料A质量分数的复合相变材料。运用DSC、TG、DTG、IR以及偏关显微镜等手段对复合材料的热性能及结构进行了测试和分析。结果表明，复合相变材料的相变焓及相变温度随相变材料A质量分数不断增加而增大，复合后材料的相变焓及相变温度均低于纯相变材料的相变焓及相变温度。红外显示二氧化硅和相变材料之间仅仅是嵌合关系。偏光照片显示复合材料表面有多孔结构，材料被嵌入二氧化硅网络结构中，从而改善了固．液材料相变过程泄漏问题，提高了材料稳定性。
In order to broaden the applying area of phase change material （PCM） and develop advanced thermal-storage material, in this paper, composite phase change materials were prepared with different phase change material mass ratio by the method of sol-gel technology. The structure and thermal property were characterized by DSC, TD, DTG, IR and polarized microscope. It was demonstrated by our research that the melting point and latent thermal of composites increased with the increasing of material A mass ratio and the melting point and latent thermal of composites are little lower than that of material A. IR shows material A was embedded in network of silicon dioxide simple. Polarized microscope shows there are many holes on surface of composites; material A was embedding in silicon dioxide network, which results in the improvement of steady performance. The liquid-leaking problem of solid-liquid PCM in phase changing process was carried out also.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A08期3164-3167,共4页
Journal of Functional Materials
基金
福建省重大科技基金资助项目（2004S56）
关键词
溶胶-凝胶法
复合
相变材料
储能
纳米二氧化硅
sol-gel technology： composite： phase change materials： thermal storage： nano-silicon dioxide
