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Design and preparation of shape-stabilized composite phase change material with high thermal reliability via encapsulating polyethylene glycol into flower-like TiO2 nanostructure for thermal energy storage
Deng, Yong1; Li, Jinhong1; Nian, Hongen2; Li, Yali1; Yin, Xiaoping1
2017-03-05
发表期刊APPLIED THERMAL ENGINEERING
卷号114页码:328-336
文章类型Article
摘要Flower-like TiO2 nanostructure (FLN-TiO2) with specific surface area of 117.61 m(2)/g, pore diameter of 3.75 nm, and spherical diameter of about 1-2 mu m was synthesized by a simple hydrothermal method. The obtained FLN-TiO2 was employed to encapsulate polyethylene glycol (PEG) as phase change material to overcome liquid leakage during phase transition and enhance the thermal reliability of the PEG/FLN-TiO2 shape-stabilized composite phase change material (ss-CPCM) after a large number of thermal cycles. SEM analysis results showed that abundant PEG was well enwrapped and dispersed inside the pores and surfaces of FLN-TiO2 due to the effect of capillary force and surface tension. The maximum encapsulation capacity of PEG with good shape stability was 50.2 wt.%. Excellent chemical compatibility between PEG and FLN-TiO2 was confirmed by FT-IR results. DSC results indicated that the phase change temperature of the PEG/FLN-TiO2 ss-CPCM in melting and solidification process was respectively 53.6 degrees C and 20.1 degrees C and corresponding latent heats were 93.68 J/g and 91.07 J/g, respectively. The weak physical interaction between the PEG and surface of FLN-TiO2 led to the lower phase change temperatures of PEG/FLN-TiO2 ss-CPCM. Different heating and cooling rates were responsible for the shift of melting/solidification temperature of PEG and PEG/FLN-TiO2 ss-CPCM. Thermal cycling test results showed that the PEG/FLN-TiO2 ss-CPCM exhibited excellent thermal reliability within at least 200 melting/solidifying cycles and demonstrated that the FLN-TiO2 benefited the thermal reliability enhancement. (C) 2016 Elsevier Ltd. All rights reserved.
关键词Polyethylene Glycol Flower-like Tio2 Nanostructure Shape-stabilized Composite Phase Change Material Thermal Reliability Enhancement
WOS标题词Science & Technology ; Physical Sciences ; Technology
关键词[WOS]MESOPOROUS SILICA ; N-OCTADECANE ; CARBON ; CONDUCTIVITY ; PERFORMANCE ; FABRICATION ; ENHANCEMENT ; VERMICULITE ; SIMULATION ; BEHAVIOR
收录类别SCI
语种英语
WOS研究方向Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
WOS类目Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
WOS记录号WOS:000395725400031
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6206
专题青海盐湖研究所知识仓储
盐湖资源与化学实验室
作者单位1.China Univ Geosci, Beijing Key Lab Mat Utilizat Nonmet Minerals & So, Natl Lab Mineral Mat, Sch Mat Sci & Technol, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lake, Xining 810008, Peoples R China
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Deng, Yong,Li, Jinhong,Nian, Hongen,et al. Design and preparation of shape-stabilized composite phase change material with high thermal reliability via encapsulating polyethylene glycol into flower-like TiO2 nanostructure for thermal energy storage[J]. APPLIED THERMAL ENGINEERING,2017,114:328-336.
APA Deng, Yong,Li, Jinhong,Nian, Hongen,Li, Yali,&Yin, Xiaoping.(2017).Design and preparation of shape-stabilized composite phase change material with high thermal reliability via encapsulating polyethylene glycol into flower-like TiO2 nanostructure for thermal energy storage.APPLIED THERMAL ENGINEERING,114,328-336.
MLA Deng, Yong,et al."Design and preparation of shape-stabilized composite phase change material with high thermal reliability via encapsulating polyethylene glycol into flower-like TiO2 nanostructure for thermal energy storage".APPLIED THERMAL ENGINEERING 114(2017):328-336.
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