ứng dụng Nanosilica biến tính Phenyl Trietoxysilan làm chất phụ gia cho lớp phủ bảo vệ chống ăn mòn

• Tác giả: Anh Sơn Nguyễn, Thùy Dương Nguyễn, Thị Xuân Hằng Tô, Anh Trúc Trịnh
• Ngôn ngữ: vie
• Ký hiệu phân loại: 667.9 Coatings and coating
• Thông tin xuất bản: Hóa học, 2015
• Mô tả vật lý: 95-100
• Bộ sưu tập: Metadata
• ID: 554643

Tóm tắt

Nanosilica was prepared by hydrolysis of tetraethyl orthosilicate (TEOS) at low pH and then treated with phenyl triethoxysilane (PTES). Nanosilica and PTES treated nanosilica were characterized by Field Emission Scanning Electron Microscope (FESEM), infrared spectroscopy (IR) and thermal gravimetric analysis (TGA). The obtained results showed that the size of nanosilica and treated nanosilica is about 20 nm and PTES treated nanosilica more homogeneous and separated. The TGA analysis results showed that the organic matter on the surface nanosilica is about 8 wt. percent. Epoxy coatings and epoxy coatings containing 3 wt percent of nanosilica and 3 wt percent of PTES treated nanosilica were prepared and applied on carbon steel. Protective property of coatings was evaluated by electrochemical impedance spectroscopy (EIS). The results showed that the presence of PTES treated nanosilica significantly improved barrier property and corrosion protection of epoxy coating.