Surface modification of BaTiO3 inclusions in polydicyclopentadiene nanocomposites for energy storage
Surface modification of BaTiO3 inclusions in polydicyclopentadiene nanocomposites for energy storage
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DOI：
10.1002/app.40290
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发表时间：
2014-06
影响因子：
3
通讯作者：
Sean P. Culver;C. Beier;J. Rafson;R. Brutchey
中科院分区：
文献类型：
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作者：
Sean P. Culver;C. Beier;J. Rafson;R. Brutchey
提出了一种新的纳米复合体系，它具有高击穿强度、改善介电常数、低介电损耗和高热稳定性。采用无溶剂原位聚合技术，在第二代GRUBS催化剂引发开环歧化聚合前，将5%BaTiO_3(BT)纳米晶分散在双环戊二烯(DCPD)中，制备了自支撑纳米复合膜。复合材料的相对介电常数由纯聚(DCPD)薄膜的1.7提高到最大值2.4，介电损耗正切降至0.7%以下。BT纳米晶的表面改性缓解了所得到的纳米复合材料的击穿强度的降低，因此相对于整齐的聚合物薄膜，仅观察到击穿强度降低了13%。©2013威利期刊公司J.应用。波兰姆。SCI。2014年，131,40290。
A new nanocomposite system displaying high breakdown strength, improved permittivity, low dielectric loss, and high thermal stability is presented. Free-standing nanocomposite films were prepared via a solvent-free in-situ polymerization technique whereby 5 vol % BaTiO3 (BT) nanocrystals with tailored surface chemistry were dispersed in dicyclopentadiene (DCPD) prior to initiation of ring opening metathesis polymerization by a second generation Grubbs catalyst. The relative permittivity was enhanced from 1.7 in the neat poly(DCPD) film to a maximum of 2.4 in the composite, while the dielectric loss tangent was minimized below 0.7%. Surface modification of the BT nanocrystals mitigated reduction in breakdown strength of the resulting nanocomposites such that only a 13% reduction in breakdown strength was observed relative to the neat polymer films. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40290.