Abstract

Nano-TiO2 was modified using γ-(methylacryloyloxyl) propyltriethoxylsilane (KH-570). Then the nano-TiO2/organic fluorine polyacrylate emulsion was prepared by using dodecafluoroheptyl methacrylate (G04), modified nano-TiO2 , methyl methacrylate (MMA), ethyl acrylate (EA) as the main raw materials and potassium persulfate as the initiator. The structure of the emulsion was characterized by FTIR, TEM and UV, and the influence of nano-TiO2 and organic fluorine monomers on the application performance of leather was investigated. The results showed that the organic fluorine monomers and nano-TiO2 participated in the copolymerization with acrylate, the prepared emulsion had a core-shell structure, and KH570 improved the dispersion of nano-TiO2 . Compared with pure polyacrylate emulsion, the UV transmittance of the composite emulsion was obviously decreased. The contact angle of leather to water was about 131.16° after finishing with fluorine-containing polyacrylate emulsion, which showed good hydrophobicity. After adding the polyacrylate emulsion containing nano-TiO2 to finish the leather, the inhibition zone diameter of Escherichia coli was 5.1mm, showing good antibacterial properties. With the introduction of nano-TiO2 and organic fluorine, the applied properties of the finished leather were also effectively improved.