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Preparation and Thermal Properties of Shape‐stabilized Paraffin/ NPGDMA / BN Composite for Phase Change Energy Storage
Author(s) -
Li Xuefeng,
Chen Lingying,
Han Weifang,
Ge Chunhua,
Guan Hongyu,
Zhang Rui,
Zhang Xiangdong
Publication year - 2020
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.202000191
Subject(s) - composite number , thermal stability , chemistry , thermal conductivity , boron nitride , thermal energy storage , liquid paraffin , composite material , chemical engineering , leakage (economics) , phase change material , fourier transform infrared spectroscopy , materials science , phase change , organic chemistry , thermodynamics , macroeconomics , economics , physics , engineering
Summary of main observation and conclusion Paraffin, as an excellent phase change material (PCM), is limited by the leakage problem and low thermal conductivity. In this research, a novel paraffin/neopentyl glycol dimethacrylate/boron nitride (paraffin/NPGDMA/BN) composite PCM was successfully prepared via a physical mixing process. NPGDMA in paraffin/NPGDMA/BN composite PCM was cured by UV light under the action of photo initiator, which can improve the shape stability to avoid the leakage of paraffin in the process of phase change. By comparing the leakage rate, latent heat, and thermal conductivity, the optimal mass ratio of paraffin and NPGDMA was selected to be 7 : 3. It was showed that the presence of 5 wt% BN led to increasing in thermal conductivity by up to 59%. The microstructure of the composite PCMs was characterized by SEM, FTIR, and XRD. The composite PCMs can be processed into a variety of shapes by using molds. The paraffin/NPGDMA/BN composite PCM exhibited a significantly improved shape stability and large phase change enthalpy of 123.0 J/g. The leakage rate of paraffin/NPGDMA/BN was much improved after being soaked with petroleum ether.