阳离子型含氟聚丙烯酸酯无皂乳液的合成 及其性能研究

Synthesis and Properties of Cationic Fluorinated Polyacrylate Emulsion-free Emulsion

摘要:

以可逆加成-断裂链转移(RAFT)聚合合成的聚甲基丙烯酸N,N-二甲氨基乙酯-b-丙烯酸六氟丁酯（PDMAEMA-b-PHFBA）为稳定剂，通过无皂乳液聚合技术合成了阳离子型含氟聚丙烯酸酯无皂乳液。采用红外光谱(FT-IR)、核磁共振氢谱(1H-NMR)、透射电子显微镜(TEM)、动态光散射(DLS)对乳胶粒子和聚合物的结构进行了表征。结果表明，当PDMAEMA-b-PHFBA用量为2.4%时，乳液的稳定性好，转化率高，乳胶粒具有明显的核壳结构，且粒径分布窄。将阳离子型含氟聚丙烯酸酯无皂乳液用于皮革涂饰后，皮革表面的防水防油性得到明显提高，随着丙烯酸六氟丁酯用量的增加，涂饰后的皮革对水和二碘甲烷的接触角逐渐增加，当丙烯酸六氟丁酯用量为10%时，涂饰后的皮革对水的接触角为125?，对二碘甲烷的接触角为81.5?。

Abstract:

Cationic fluorinated polyacrylate emulsion-free emulsion was synthesized using poly(2-(dimethylamino)ethyl methacrylate)-b-poly(hexafluorobutyl acrylate) (PDMAEMA-b -PHFBA) synthesized by reversible addition fragamentation chain transfer（RAFT）polymerization as a stabilizer via emulsion-free emulsion polymerization. The latex particle and polymer were characterized by means of Fourier-transform infrared spectroscopy(FTIR), 1H nuclear magnetic resonance spectroscopy (1H-NMR), transition electron microscopy(TEM )and dynamic light scattering (DLS). The results showed that when the dosage of PDMAEMA-b-PHFBA was 2.4%，the emulsion displayed the good stability and high monomer conversion, and the latex particle with a core-shell structure and narrow particle size distributiond was obtained. The leather finished by cationic fluorinated emulsion-free emulsion showed good water-proof and oil-proof properties. The water and diiodomethane contact angle of finished leather increased with increase of the amount of hexafluorobutyl acrylate. When the dosage of hexafluorobutyl acrylate was 10%, the water contact angle was up to 125?and the diiodomethane contact angle was up to 81.5?