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Abstract

Engineering

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Published: September 19th, 2020

DOI:

10.3791/60916

1Taiyuan University of Science and Technology, 2Heavy Machinery Engineering Research Center of the Ministry of Education, 3Laboratory of Magnetic and Electric Functional Materials and Applications, The Key Laboratory of Shanxi Province, 4Beijing Institute of Aerospace System Engineering, 5Department of Electrical and Information Engineering, Sichuan College of Architectural Technology

Abstract

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.

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Keywords Polymer Nanocomposites

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