Epoxy/Nano-SiO₂ Anticorrosion Coatings Synthesized by Different Molar Ratio of Tetraethyl orthosilicate (TEOS) and Tetramethyl orthosilicate (TMOS)

摘要

Epoxyano-SiO 2 composite coatings were carried out by using epoxy with different TEOS/TMOSmolar ratio. Nano-silica particles, which were synthesized by different molar ratio of tetraethylorthosilicate (TEOS) and tetramethyl orthosilicate (TMOS), manifested different characteristics inparticle size and modifier graft coverage. The structure was analyzed by FT-IR, XRD and SEM. Theparticle size of the silica was correspondingly reduced and the surface coverage of the APTES decreasedwith the TMOS content reduced. Thus, the particle size and surface coverage of the APTES play animportant role in corrosion resistant of epoxyano-SiO 2 composite coatings. The results showed thatthe composite coating had the best anticorrosion effect when the molar ratio of TEOS / TMOS was 1: 1.