Contact
    Start Publications Preparation and study of hydrophobic silica@ZSM-5 ...
    ←  Publication Finder
    Attension

    Preparation and study of hydrophobic silica@ZSM-5 nanocomposites for multi-functional coating

    Year: 2022

    Journal: Microporous Mesoporous Mat., Volume 344, OCT

    Authors: Hu, Zhen-Wen; Wang, Lei; Zhao, Zheng-Bai; Ma, Yong; Lin, Ding-Duo; Liu, Ji-Dong; Du, Xiang-Yun; Li, Wei-Li

    Organizations: National Natural Science Foundation of China (NSFC); [51673088]

    Keywords: Composite; Molecular sieve; Hydrophobicity; Dielectric properties; Anti -corrosion

    In this study, the easy moisture absorption of molecular sieves was addressed by a two-step surface hydrophobic modification process. First, the hydrolysis-condensation of tetraethoxysilane (TEOS) was performed on the pre-treated ZSM-5 zeolite powders to fabricate silica encapsulated ZSM-5 (SiO2@ZSM-5) molecular sieves. Second, hydrogen-containing silicone oil (HCSO) was grafted on the surface of SiO2@ZSM-5 molecular sieves to prepare hydrogen-containing silicone oil modified silica@ZSM-5 (HCSO-m-SiO2@ZSM-5) nanocomposites. After modi-fication, the BET specific surface area of HCSO-m-SiO2@ZSM-5 nanocomposite was reduced from 275 to 69 m2 g- 1 from 4.6 to 2.6 nm. Then, the HCSO-m-SiO2@ZSM-5 nanocomposites were used as fillers to endow epoxy resin (EPR) coatings with hydrophobicity. The water contact angle of as-prepared HCSO-m-SiO2@ZSM-5/EPR com-posite coatings reached up to 148 degrees at 30 wt% filler content. Electrochemical analysis shows that the corrosion potential (Ecorr) of composite coatings was positively shifted from-1.060 to-0.433 V and the corrosion current (Icorr) was reduced from 9.0791 x 10- 5 to 2.4433 x 10-6 A/cm2 with the increase of filler content from 0 to 30 wt%, demonstrating their enhanced anti-corrosion property. Furthermore, the dielectric, light-shielding and mechanical properties were investigated. The results indicate that the composite coatings perform multifunctions of good hydrophobicity, dielectric performance, anti-corrosion, light-shielding efficiency and mechanical prop-erties, which may have great potential in electronics applications. , the pore volume was decreased from 0.27 to 0.05 cm3 g-1, and the average pore diameter was decreased
    View publication