十八醇/DMDBS凝胶态相变材料的制备与性能研究

被引:12
作者
陶乃敏 [1 ]
田妥 [1 ]
宋健 [1 ]
冯荣秀 [1 ]
徐恒启 [2 ]
机构
[1] 天津大学化工学院
[2] 沈阳工业大学石油化工学院
关键词
相变材料; 凝胶因子; 二(3,4-二甲基苄叉)山梨醇; 十八醇; 膨胀石墨;
D O I
暂无
中图分类号
TB34 [功能材料];
学科分类号
080906 [电磁信息功能材料与结构];
摘要
研究了凝胶因子在醇类复合相变材料中的应用,以十八醇为储能材料,以二(3,4-二甲基苄叉)山梨醇(DMDBS)为凝胶因子制备了一种新的凝胶态复合相变材料,得到的复合相变材料具有较高的储能密度,相变材料的含量可达到94.2%。所制备的复合相变材料不易发生泄漏,DMDBS添加量为3%时,复合相变材料的凝胶解缔温度为177.4~189.8℃,远高于十八醇的熔点。DSC结果表明,复合相变材料的熔融焓变和凝固焓变分别为184.4和180.9J/g。经过100次热循环实验后,复合相变材料的相变温度没有明显变化,焓变值略有降低。通过SEM观察了复合相变材料和干凝胶的表面形态。通过添加膨胀石墨(EG)提高了复合PCM的导热性,使升温和降温时间分别缩短了54.75%和56.36%。
引用
收藏
页码:1943 / 1947
页数:5
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