期刊
COMPOSITES PART B-ENGINEERING
卷 179, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2019.107545
关键词
Polyethylene glycol; Phase change materials; Double-network structure; Thermal properties
资金
- National Natural Science Foundation of China [51503173]
- National Engineering Technology Center for Insulation Materials, Southwest University of Science and Technology [16kfjc09]
- Longshan academic talent research supporting program of SWUST [17LZX636, 18LZX629]
- Graphene Engineering Technology Research Center of Sichuan [2018SCGCZX05]
Polyethylene glycol (PEG) as a phase change material (PCM) is limited in practical applications due to the three major drawbacks of low thermal conductivity, poor thermal stability, and easy leakage. In this study, a new shape-stabilized PPVA/GA/PEG PCM based on Phosphorylated polyvinyl alcohol (PPVA) and graphene aerogels (GA) as a double-network support material was obtained using a one-step method, and the three major obstacles of PEG as a PCM were well resolved in this composite material. 15%-PPVA/GA/PEG composite PCMs still exhibit high energy storage capacity while having high thermal stability and high shape-stabilized property. 15%-PPVA/GA/PEG composite PCMs (0.610 W m(-1) K-1), with only 1.60 wt% GA, showed an enhanced thermal conductivity than that of PEG (0.493 W m(-1) K-1), and it still exhibited an acceptable latent heat of fusion of 119.6 J g(-1). Furthermore, the peak heat release rate of 15%-PPVA/GA/PEG composite PCMs decreased by 19.2% compared with PEG. The above experimental results indicate that the prepared PPVA/GA/PEG composite PCMs have application prospects in thermal energy storage field.
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