Effects of surface properties of colloidal silica particles on redispersibility and properties of acrylic-based polyurethane/silica composites.
Nanosilica particles with different surface properties were designed and prepared using colloidal silica particles and four different qualitative silane coupling agents (SCA), namely methyltriethoxysilane (MTES), octyltriethoxysilane (OTES), vinyltriethoxysilane (VTES) and methacryloxypropyltrimethoxysilane (MATMS), and further applied in acrylic resins and corresponding polyurethane coats by in situ polymerization. It was found that different qualitative SCA molecules had very different impacts on the redispersibility of nanosilica particles, the adsorbed acrylic polyol molecules, the viscosities of acrylic polyol/silica hybrid resins, and the properties of acrylic-based polyurethane/silica composites.
Chen
Guodong
G
Department of Materials Science, Advanced Coatings Research Center of China Educational Ministry, Fudan University, Shanghai 200433, People's Republic of China.
Zhou
Shuxue
S
Gu
Guangxin
G
Yang
Haihua
H
Wu
Limin
L