The role of epoxy matrix occlusions within BaTiO3 nanoparticles on the dielectric properties of functionalized BaTiO3/epoxy nanocomposites
The role of epoxy matrix occlusions within BaTiO3 nanoparticles on the dielectric properties of functionalized BaTiO3/epoxy nanocomposites
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DOI：
10.1016/j.compositesa.2016.08.018
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发表时间：
2016-11
影响因子：
8.7
通讯作者：
Thi Tuyet Mai Phan;N. Chu;Van Boi Luu;H. N. Xuân;I. Martin;Pascal Carrière
中科院分区：
文献类型：
--
作者：
Thi Tuyet Mai Phan;N. Chu;Van Boi Luu;H. N. Xuân;I. Martin;Pascal Carrière
本文详细研究了不同的实验参数如频率、陶瓷含量和温度对钛酸钡(BaTiO_3)纳米复合材料介电性能的影响。在超声和搅拌作用下分散硅烷化的BaTiO_3纳米粉末，得到了不同形貌的环氧胺基纳米复合材料。含胺基团的纳米硅烷官能化有效地改善了纳米BaTiO_3与环氧基的相容性。纳米BaTiO_3负载后，复合材料的储能模数、玻璃化转变温度、拉伸和弯曲性能以及介电性能都得到了很大的提高，达到了10%左右，且在基体中分散良好。纳米BaTiO310%以上，扫描电子显微镜和热分析表明，纳米粒子发生了团聚。对纳米复合材料的流变性能和力学性能进行了评价，并对复合材料的基质封闭行为进行了研究。根据闭塞聚合物的特殊行为，讨论了其介电性能，特别是介电损耗。
In this work, the effects of controlled nanoparticles aggregations of barium titanate (BaTiO3) on the dielectric properties of epoxy nanocomposites are investigated in detail with respect to different experimental parameters like frequency, ceramic content and temperature. Dispersing silanized BaTiO3nanopowder under ultrasonic and stir, nanocomposites of epoxy-amine matrix with different morphologies are obtained. The nanoparticles silane functionalization containing amine end groups effectively improve the compatibility of the nano-BaTiO3and the epoxy matrix. Storage modulus, glass transition temperature, tensile and flexural properties of nanocomposites and dielectric properties are increased until 10% by weight of nano-BaTiO3loading, well dispersed in the matrix. Above 10 wt.% of nano-BaTiO3, scanning electronic microscopy and thermal analysis showed that agglomeration of nanoparticles occurs. Rheological and mechanical nanocomposites properties were evaluated and matrix occlusion behaviors were identified. In light of the specific behavior of the occluded polymer, the dielectric properties, especially dielectric loss are discussed.