Page 93 - 《精细化工》2021年第5期

第 38 卷第 5 期 精 细 化 工 Vol.38, No.5
202 1 年 5 月 FINE CHEMICALS May 2021

功能材料
还原氧化石墨烯气凝胶/二十烷相变

材料的制备及性能

李 军 1,2,3 ，陈人杰 1,2,3 ，谢德龙 1,2,3 ，谢于辉 1,2,3* ，

朱远蹠 1,2,3* ，梅 毅 1,2,3
（1. 昆明理工大学 化学工程学院，云南 昆明 650500；2. 云南省磷化工节能与新材料重点实验室，云
南 昆明 650500；3. 云南省高校磷化工重点实验室，云南 昆明 650500）

摘要：以氧化石墨烯（GO）为原料，采用胶体团聚法制备了还原氧化石墨烯气凝胶，再通过自扩散获得了还原
氧化石墨烯气凝胶/二十烷（r-GO aerogel/eicosane）复合相变材料，研究了复合材料结构与性能的关系。采用热
重分析仪（TGA）和差示扫描量热仪（DSC）测试了二十烷和复合材料的热性能，确认了二十烷质量分数与复
合材料焓值的关系，探讨了相变循环次数对材料稳定性的影响。结果表明，复合材料的焓值与二十烷的质量分
数成正比；经过 50 次相变循环后，二十烷的理论质量分数为 95%的样品（PCM4）的储能性能仍然保持稳定。
热导性能分析表明，还原氧化石墨烯气凝胶可以改善二十烷的热导率。此外，通过太阳光模拟测试计算出复合
材料的光热转换效率为 55%。
关键词：气凝胶；复合相变材料；热性能；光热转换效率；功能材料
中图分类号：TB34 文献标识码：A 文章编号：1003-5214 (2021) 05-0947-07

Preparation and properties of reduced graphene oxide

aerogel/eicosane phase change materials

LI Jun 1,2,3 , CHEN Renjie 1,2,3 , XIE Delong 1,2,3 , XIE Yuhui 1,2,3* , ZHU Yuanzhi 1,2,3* , MEI Yi 1,2,3
（1. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan,
China; 2. Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New
Phosphorus Materials, Kunming 650500, Yunnan, China; 3. Higher Educational Key Laboratory for Phosphorus
Chemical Engineering of Yunnan Province, Kunming 650500, Yunnan, China）

Abstract: Reduced graphene oxide aerogel was prepared by colloidal agglomeration method from graphene
oxide (GO). Then, reduced graphene oxide aerogel/eicosane (r-GO aerogel/eicosane) composite phase
change materials were obtained through self-diffusion eicosane. The relationship between structure and
performance of composites was investigated. Thermal properties of eicosane and composites were tested by
TGA and DSC. The relationship between mass fraction of eicosane and enthalpy value of composites was
confirmed. The effect of phase change cycles on the stability of composites was explored. The results
showed that the enthalpy value of composites was directly proportional to the mass fraction of eicosane.
After 50 phase change cycles, the sample with 95% theoretical mass fraction of eicosane (PCM4) still
remained stable energy storage performance. The thermal conductivity analysis displayed that reduced
graphene oxide aerogel could improve the thermal conductivity of eicosane. In addition, the light-to-thermal
conversion efficiency of the composite was about 55% by sunlight simulation test.
Key words: aerogel; composite phase change materials; thermal properties; light-to-thermal conversion
efficiency; functional materials

收稿日期：2020-10-22; 定用日期：2020-12-25; DOI: 10.13550/j.jxhg.20200964
基金项目：国家自然科学基金（21663015，51603096）
作者简介：李 军（1993—），男，硕士生。联系人：谢于辉（1988—），男，副教授，E-mail：yuhuixie@kust.edu.cn；朱远蹠（1989—），
男，副教授，E-mail：yuanzhi_zhu@kust.edu.cn。