摘要
以月桂酸-肉豆蔻酸(LA-MA)低共熔酸为芯材,膨胀石墨(EG)为担载材料,利用熔融吸附法制备LA-MA/EG复合相变材料。采用有机无机复合硅溶胶对其包封定形,得到LA-MA/EG封装复合相变材料用来改善相变过程中液态脂肪酸的渗漏问题,并通过SEM、FT-IR和DSC对该封装复合相变材料的结构和性能进行表征。结果表明:LA-MA/EG封装复合相变材料的潜热和相变温度为119.5 J/g和31.2℃;封装材料并未引起新生成物的出现,且可明显抑制脂肪酸的渗漏现象;加速热循环后的封装复合相变材料仍可保持良好的储能性质。
The eutectic acid of lauric acid （LA） and myristic acid （MA） was prepared as the core material, expanded graphite （EG） was as the substrate material. Then the LA-MA/EG composite phase change materials were prepared by absorbing LA-MA into the porous network of expanded graphite. The organic and inorganic composite sol was used to enclosure and form for getting encapsulation composite PCMs to improve leak problem of liquid fatty acid in phase change process. The structure and performance of the encapsulation composite PCMs were carried out the characterization by SEM, FT-IR and DSC. The results show that the latent heat and phase change temperature of LA-MA encapsulation composite PCMs are 31.2 ℃ and 119.5 J/g, respectively; encapsulation materials haven＇t led to new material and can restrain leak phenomenon of fatty acid; the encapsulation composite PCMs still can maintain good performance of energy storage after accelerated thermal cycles.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2016年第10期2627-2632,共6页
Acta Energiae Solaris Sinica
基金
"十二五"国家科技支撑计划(2014BAL03B04)
关键词
脂肪酸
膨胀石墨
渗漏
封装复合相变材料
热性能
fatty acid
expanded graphite
leakage
encapsulation composite PCMs
thermal property
