Synthesis, characterization and performance of nanosized Bi0.1Sn0.9O2–WPU organic–inorganic hybrid coatings

Abstract

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. Bi0.1Sn0.9O2 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). Bi0.1Sn0.9O2–WPU was then fabricated with isophorone diisocyanate, 2,2-bis(hydroxymethyl) propionic acid and nano-Bi0.1Sn0.9O2-poly(e-caprolactone) (PCL) as the starting materials. Organic–inorganic hybrid coatings are always achieved with adjustable contents of Bi0.1Sn0.9O2. The hybrid coatings with Bi0.1Sn0.9O2 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-Bi0.1Sn0.9O2 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-Bi0.1Sn0.9O2–WPU hybrid was over 60 °C in contrast to the commercial blank glass.