Plasma Treated TiO₂ Nanoparticles for Dispersion Enhancement

【摘要】 <正> TiO₂ nanoparticles were treated in a fluidized reactor by introducing Hexamethyld-isiloxane（HMDSO）plasma monomer.The organic HMDSO-polymer vapor was condensed on thenanoparticles and lowered their surface energy.This plasma treatment was harmless to the crystallattice of the TiO₂ nanoparticles.The treated nanoparticles were mixed in glycol solutions andpolymerized into TiO₂-polyester composites for studying the effect of plasma deposition on disper-sion.It was found that the dispersion of the TiO₂ nanoparticles in both glycol and the polyestermatrix was significantly improved due to lower surface energy and HMDSO plasma treatment,as from ultraviolet absorbency measurements and scanning electron microscopy observation.Thetheory of colloid stability successfully explained the dispersion enhancement of TiO₂ nanoparticlesin glycol.更多还原

【Abstract】 TiO₂ nanoparticles were treated in a fluidized reactor by introducing Hexamethyld- isiloxane（HMDSO）plasma monomer.The organic HMDSO-polymer vapor was condensed on the nanoparticles and lowered their surface energy.This plasma treatment was harmless to the crystal lattice of the TiO₂ nanoparticles.The treated nanoparticles were mixed in glycol solutions and polymerized into TiO₂-polyester composites for studying the effect of plasma deposition on disper- sion.It was found that the dispersion of the TiO₂ nanoparticles in both glycol and the polyester matrix was significantly improved due to lower surface energy and HMDSO plasma treatment, as from ultraviolet absorbency measurements and scanning electron microscopy observation.The theory of colloid stability successfully explained the dispersion enhancement of TiO₂ nanoparticles in glycol.更多还原