应用偶联剂改善聚合物基纳米复合材料的介电性能。
Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites.
作者信息
Li Haotian, Zhang Dong, Li Zechen, Li Leyi, Liu Jiachen, Li Yugui
机构信息
Taiyuan University of Science and Technology; Heavy Machinery Engineering Research Center of the Ministry of Education; Laboratory of Magnetic and Electric Functional Materials and Applications, The Key Laboratory of Shanxi Province;
Beijing Institute of Aerospace System Engineering.
出版信息
J Vis Exp. 2020 Sep 19(163). doi: 10.3791/60916.
In this work, an easy, low-cost, and widely applicable method was developed to improve the compatibility between the ceramic fillers and the polymer matrix by adding 3-aminopropyltriethoxysilane (KH550) as a coupling agent during the fabrication process of BaTiO3-P(VDF-CTFE) nanocomposites through solution casting. Results show that the use of KH550 can modify the surface of ceramic nanofillers; therefore, good wettability on the ceramic-polymer interface was achieved, and the enhanced energy storage performances were obtained by a suitable amount of the coupling agent. This method can be used to prepare flexible composites, which is highly desirable for the production of high-performance film capacitors. If an excessive amount of coupling agent is used in the process, the non-attached coupling agent can participate in complex reactions, which leads to a decrease in dielectric constant and an increase in dielectric loss.
在本工作中，开发了一种简便、低成本且广泛适用的方法，即在通过溶液浇铸制备BaTiO₃-P(VDF-CTFE)纳米复合材料的过程中，添加3-氨丙基三乙氧基硅烷（KH550）作为偶联剂，以改善陶瓷填料与聚合物基体之间的相容性。结果表明，KH550的使用可以修饰陶瓷纳米填料的表面；因此，在陶瓷-聚合物界面上实现了良好的润湿性，并且通过适量的偶联剂获得了增强的储能性能。该方法可用于制备柔性复合材料，这对于高性能薄膜电容器的生产非常理想。如果在该过程中使用过量的偶联剂，未附着的偶联剂会参与复杂反应，导致介电常数降低和介电损耗增加。
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