Abstract: Microemulsion of TiO2 nanocrystalline in vesicle was prepared using butyl titanate as raw materials.TiO2 nanocrystalline was gotted in vesicles micro-reactor formed by self-assembled of hexadecyl trimethyl ammonium bromide and sodium dodecyl benzene sulfonic acid.UPC/TVM composite leather finishing agent was gotted mixing TiO2 nanocrystalline vesicle microemulsion(TVM) and aqueous polyurethane (UPC).The dispersion, film forming and coating properties of finishing agent was studied when TiO2 vacuoles microemulsion with different ratio of polyurethane using TEM, melvin methods of grain size analysis and ultraviolet diffuse.The results show that the TiO2 vesicle microemulsion with polyurethane and hot wax slurry form uniform microemulsion with the particle size of about 80 nm.The tensile strength, elongation at break, water-absorbing quality, antibacterial ability and ultraviolet resistant of UPC/TVM3 membrane with TiO2 vesicle microemulsion were significantly increased comparing with UPC membrane.The applied experimental results of UPC/TVM composite leather finishing agent show that the water resistance of the coating and folding performance had been improved significantly.

Key words: Microemulsion of TiO2 nanocrystalline in vesicle was prepared using butyl titanate as raw materials.TiO2 nanocrystalline was gotted in vesicles micro-reactor formed by self-assembled of hexadecyl trimethyl ammonium bromide and sodium dodecyl benzene sulfonic acid.UPC/TVM composite leather finishing agent was gotted mixing TiO2 nanocrystalline vesicle microemulsion(TVM) and aqueous polyurethane (UPC).The dispersion, film forming and coating properties of finishing agent was studied when TiO2 vacuoles microemulsion with different ratio of polyurethane using TEM, melvin methods of grain size analysis and ultraviolet diffuse.The results show that the TiO2 vesicle microemulsion with polyurethane and hot wax slurry form uniform microemulsion with the particle size of about 80 nm.The tensile strength, elongation at break, water-absorbing quality, antibacterial ability and ultraviolet resistant of UPC/TVM3 membrane with TiO2 vesicle microemulsion were significantly increased comparing with UPC membrane.The applied experimental results of UPC/TVM composite leather finishing agent show that the water resistance of the coating and folding performance had been improved significantly.