Premium
Preparation and characterization of waterborne epoxy coatings containing conductive PANi /silica nanoparticles
Author(s) -
Duong Nguyen Thuy,
Thuy Thai Thu,
Tham Do Quang,
Mai Tran Thi,
Trang Nguyen Thi Thu,
Vu Pham Gia,
Son Nguyen Anh
Publication year - 2020
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.201900159
Subject(s) - polyaniline , materials science , epoxy , nanocomposite , composite material , dielectric , coating , nanoparticle , polymerization , scanning electron microscope , in situ polymerization , chemical engineering , polymer , nanotechnology , optoelectronics , engineering
This work reports on the mechanical and dielectric properties of waterborne epoxy coatings containing polyaniline/silica nanocomposites (PANi/SiO 2 ). The nanocomposites with different PANi/SiO 2 ratios were synthesized by in‐situ chemical oxidative polymerization method. The morphology and electric properties of PANi/SiO 2 were examined by field emission scanning electron microscopy (FESEM) and standard four‐probe electrode method. It was shown that the silica nanoparticles were grafted by PANi and it conducted a decrease of electrical conductivity of PANi/SiO 2 composites, compared to pure PANi. The epoxy coatings containing PANi/SiO 2 presented lower dielectric properties than that containing pure PANi. In contrast, the PANi/SiO 2 could maintain the breakdown voltage (from 16.6 to 19.1 kV/mm) and enhance impact resistance of conducting epoxy system up to 100 kg.cm. The results revealed that the PANi/SiO 2 nanocomposite can be used in electrical coating application with good dielectric strength and mechanical properties.