个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:中科院金属所
学位:博士
所在单位:化工学院
学科:无机化学
办公地点:大连理工大学化学楼401
联系方式:13940825088
电子邮箱:cgmeng@dlut.edu.cn
Phase change in modified hierarchically porous monolith: An extra energy increase
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论文类型:期刊论文
发表时间:2014-07-15
发表刊物:MICROPOROUS AND MESOPOROUS MATERIALS
收录刊物:SCIE、EI、Scopus
卷号:193
页面范围:69-76
ISSN号:1387-1811
关键字:Monolith; Hierarchically porous; Phase change; Confined space; Surface modification
摘要:Composite phase change material (PCM) was prepared by loading pure PCM in the hierarchically porous silica (HPS) matrix. Via the modification by organic silanes, the surface property of the hybrid silica material was effectively controlled. The functional surface groups were not only helpful to reach high loading capacity for PCM (up to 3.5 times of HPS's weight), but beneficial to enhance the energy storage capacity in confinement. An extra energy increase (about 10% of the total enthalpy value) could be revealed during the phase change process due to the strong van der Waals interaction between modified surface and PCM. The latent heat values of composite PCM (including HPS) could be 163.0 J g(-1). The PCM in modified HPS showed high thermal storage capability (about 99.34% to pure PCM). It was important to study the influence of modified surface on energy storage in confined space. The discussion would be useful to advance high-performance PCM composites. (C) 2014 Elsevier Inc. All rights reserved.