Preparation and Performance of Fluorinated Acrylate Copolymer Emulsion

Objective To identify the best formula of fluorinated acrylate copolymer emulsion, and investigate the performance parameters such as hydro-oleophobic and thermodynamic properties. Methods A series of fluorinated acrylate copolymer latex with core–shell structure were synthesized by semi-continuous seeded emulsion polymerization method using methyl methacrylate(MMA), butyl acrylate(BA)and acrylic acid(AA)as the raw material, PFOA as the fluorinated acrylate monomer, ammonium persulfate(APS) as the initiator, sodium dodecyl sulfate(SDS) and polyoxyethylene octyl phenyl ether(OP-10)as the complex emulsifier and taking water as the dispersion medium. The hydro-oleophobic and thermodynamic properties as well as the surface chemical components were characterized by contact angle goniometer(CA), fourier transform infrared(FTIR) spectroscopy, differential scanning calorimetry(DSC),thermogravimetry analysis(TG) and atomic force microscopy(AFM), respectively. Results The results showed that when the dosage of emulsifier was 3%, the initiator content was 0.6%, and the mass fraction offluorinated monomer was9%, the monomer conversion was the highest and the gel rate was the lowest, while the water contact angle and hexadecane contact angle reached 104° and 71°, respectively. Conclusion The emulsion shows good performance including hydro-oleophobic and thermodynamic properties, and is therefore suitable as inner wall coating of the ink tank and other products.