Thermosetting semi-interpenetrating phase change materials with heat-triggered network self-dissociation

被引：14
作者：
Fu, Xiaowei [1 ]
Yuan, Anqian [1 ]
Lei, Yuan [1 ]
Wei, Zhengkai [1 ]
Xu, Hualiang [1 ]
Lei, Jingxin [1 ]
机构：
[1] Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China
来源：
SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2021年 / 225卷
关键词：
Phase change materials; Thermal energy storage; Self-dissociation; Polymer network; Transesterification; POLYURETHANE; POLYESTERS;
D O I：
10.1016/j.solmat.2021.111031
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Thermosetting semi-interpenetrating phase change materials (SIPCMs) containing anchored and free polyethylene glycol (PEG) were synthesized via high efficiency esterification reaction without by-products of low molecular weight, enabling heat-triggered bulk network self-dissociation (NSD) towards linear/branched polymers from polymer networks. The NSD resulted from the catalyst-involved transesterification reaction between free PEG and network chains with readily tunable heat-triggered conditions. The SIPCMs with latent heat up to 130 J/g had high thermal reliability and stability during phase change (similar to 50 degrees C) and could encounter with NSD above triggered temperature (150-180 degrees C). The NSD technique will enable the sustainability, recycling and degradability of thermosets, providing an alternative to molecular design of smart polymer networks.
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