Preparation and characterization of waterborne epoxy coatings containing conductive PANi/silica nanoparticles. Issue 2 (24th April 2020)

• Record Type: Journal Article
• Authors: Duong, Nguyen Thuy; Thuy, Thai Thu; Tham, Do Quang; Mai, Tran Thi; Trang, Nguyen Thi Thu; Vu, Pham Gia; Son, Nguyen Anh
• Is Part Of: Vietnam journal of chemistry. Volume 58:Issue 2(2020)
• Page Start: 206
• Page End: 211
• Publication Date: 2020-04-24
• Subjects: Polyaniline -- silica nanoparticles -- waterborne epoxy -- impact strength -- dielectric properties; Chemistry -- Periodicals; 540
• DOI: 10.1002/vjch.201900159
• Languages: English
• ISSNs: 0866-7144

Abstract

Abstract: This work reports on the mechanical and dielectric properties of waterborne epoxy coatings containing polyaniline/silica nanocomposites (PANi/SiO2 ). The nanocomposites with different PANi/SiO2 ratios were synthesized by in‐situ chemical oxidative polymerization method. The morphology and electric properties of PANi/SiO2 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/SiO2 composites, compared to pure PANi. The epoxy coatings containing PANi/SiO2 presented lower dielectric properties than that containing pure PANi. In contrast, the PANi/SiO2 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/SiO2 nanocomposite can be used in electrical coating application with good dielectric strength and mechanical properties.