Self-healing, recoverable epoxy elastomers and their composites with desirable thermal conductivities by incorporating BN fillers via in-situ polymerization
Self-healing, recoverable epoxy elastomers and their composites with desirable thermal conductivities by incorporating BN fillers via in-situ polymerization
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DOI：
10.1016/j.compscitech.2018.05.038
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发表时间：
2018-08-18
影响因子：
9.1
通讯作者：
Gu, Junwei
中科院分区：
文献类型：
--
作者：
Yang, Xutong;Guo, Yongqiang;Gu, Junwei
首先通过硫醇-环氧化物亲核开环反应制备了硫醇-环氧弹性体，然后通过原位聚合将微米级氮化硼(MBN)填料引入到该体系中，最后通过热压法制备了高导热、自愈和可回收的MBN/硫醇-环氧弹性体复合材料。结果表明，硫醇-环氧化物反应高效、稳定。采用60wt%MBN填充剂制得的MBN/硫醇-环氧弹性体复合材料具有最佳的导热系数(波长为1.058 W/mK)、良好的自愈效果和效率(自愈后的拉伸强度可保持在原始复合材料的85%以上)、良好的恢复性能(后成型后的拉伸强度可保持原始复合材料的70%以上)和良好的热稳定性(耐热指数T-HRI为149.9℃)。RNBN/硫醇-环氧弹性体复合材料的拉姆达值的提高有利于促进依赖热响应的自愈体系的发展。
Thiol-epoxy elastomers were firstly prepared by thiol-epoxide nucleophilic ring-opening reaction, and the micron boron nitride (mBN) fillers were then introduced into the above system via in-situ polymerization, finally to prepare the highly thermally conductive, self-healing and recoverable mBN/thiol-epoxy elastomer composites by hot-pressing method. Results revealed that the thiol-epoxide reaction was highly efficient and stable. The obtained mBN/thiol-epoxy elastomer composite with 60 wt% mBN fillers presented the optimal thermal conductivity (lambda of 1.058 W/mK), excellent self-healing effect & efficiency which is achieved via transesterification reaction (Tensile strength after self-healing could maintain at more than 85% compared to that of original composites), wonderful recoverable performance (Tensile strength after post forming could maintain over 70% compared to that of original composites) and good thermal stability (Theat-resistance index, T-HRI of 149.9 degrees C). And the improvement in lambda value of the rnBN/thiol-epoxy elastomer composites was beneficial to the promotion of the self-healing systems relying on thermal response.