Synthesis, characterization and performance of nanosized Bi_(0.1)Sn_(0.9)O2-WPU organic-inorganic hybrid coatings

摘要

A series of organic-inorganic hybrid coatings consisting of organic waterborne polyurethane (WPU) and inorganic nanosized bismuth-doped tin dioxide were successfully synthesized by the in situ polymerization approach. Bi_(0.1)Sn_(0.9)O2 nano-powders were prepared via a new route of sol-gel combustion hybrid method using acetylene black as the fuel. The formed nano-powders were characterized by transmission electron microscopy and X-ray diffraction (XRD). Bi_(0.1)Sn_(0.9)O2-WPU was then fabri-catedwith isophorone diisocyanate, 2,2-bis(hydroxymethyl) propionic acid and nano-Bi_(0.1)Sn_(0.9)O2-poly(e-caprolactone) (PCL) as the starting materials. Organic-inorganic hybrid coatings are, always achieved with adjustable contents of Bi_(0.1)Sn_(0.9)O2. The hybrid coatings with Bi_(0.1)Sn_(0.9)O2 loading on the glass substrate exhibited good heat insulation efficiency. The tensile strength and breaking extensibility of nanocomposite film containing 1.0% of the nano-Bi_(0.1)Sn_(0.9)O2 were measured as 9.35 MPa and 248%, respectively. The transmittance of visible light was above 80%. The heat insulation of glass coated with nano-Bi_(0.1)Sn_(0.9)O2-WPU hybrid was over 60 °C in contrast to the commercial blank glass.