双原位合成超低填充硼酸钙/聚对苯二甲酸乙二醇酯纳米复合材料及其介电储能研究  

Dual in situ Synthesis of Ultra-low Filled Calcium Borate/Poly(ethylene terephthalate)Nanocomposites for Excellent Capacitive Properities

作　　者：罗非艳 李岩潼 何利 张迦宇 李佳乐 孙囡 张全平[1] Fei-yan Luo;Yan-tong Li;Li He;Jia-yu Zhang;Jia-le Li;Nan Sun;Quan-ping Zhang(State Key Laboratory of Environmentally-Friendly Energy Materials,School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010)

机构地区：[1]西南科技大学、环境友好能源材料国家重点实验室、材料与化学学院,绵阳621010

出　　处：《高分子学报》2024年第9期1207-1215,共9页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号22309151);四川省自然科学基金(基金号2022NSFSC0311);国家国防科技工业局乏燃料后处理科研专项资助项目.

摘　　要：引入超低含量纳米粒子至聚合物基体能够同时改善介电常数和击穿强度,从而显著提升聚合物薄膜电容储能密度,有助于器件小型化.目前溶液共混策略中的有机溶剂回收及环境安全等诸多因素限制了超低填充聚合物纳米复合材料规模化制备及应用.本文工作提出双原位合成策略:聚对苯二甲酸乙二醇酯(PET)聚合与硼酸钙纳米粒子生长同步,无需任何溶剂实现0.2 wt%硼酸钙纳米粒子均匀分散于PET基体,且界面良好相容.聚酯纳米复合材料介电常数为4.91,最大储能密度为10.69 J/cm^(3),是纯PET 1.94倍.这种双原位合成策略能潜在扩展其他聚酯纳米复合体系,且能批量化制备,为探索聚酯纳米复合材料电能存储和其他应用提供理论依据.Incorporating ultra-low loading of nanoparticles into polymer matrices can simultaneously improve the dielectric constant and breakdown strength,thereby significantly increasing the capacitance energy storage density of polymer nanocomposites and miniaturing electronics and devices.However,there are still a series of tough issues to be dealt with,such as the use of organic solvents in the current solution blending,which face enormous challenges in scalable preparation and application of the polymer nanocomposites.Here,a dual in situ synthesis strategy is proposed,namely the polymerization of poly(ethylene terephthalate)(PET)synchronizes with the growth of calcium borate nanoparticles.In particular,0.2 wt%calcium borate nanoparticles are uniformly dispersed in the PET matrix without any solvent, and rich compatibility of the interfaces occurs. The dielectric constant reaches 4.91 and the maximum energy storage density is up to 10.69 J/cm^(3), which is 1.94 times that of neat PET. The unique dual in situ synthesis strategy tends to be extended to the scalable fabrication of polyester nanocomposites filled with a variety of borates, which paves a way for exploring electrical energy storage and other applications of polyester nanocomposites.

关 键 词：双原位 超低填充 介电性能 储能密度 

分 类 号：TB332[一般工业技术—材料科学与工程]