Synthesis and surface properties of amphiphilic copolymer consisting of hydrophobic perfluorocarbon and hydrophilic zwitterionic blocks

[摘要] Amphiphilic copolymers are receiving increasing attention due to their special features in solubility and self-assembling. Random and block copolymers containing superhydrophobic 2-perfluomoctylethyl acrylate (FA-C-8) and superhydrophilic 3-[dimethyl (2'-methacryloyloxyethyl) ammonio] propanesulfonate (MAPS) segments were designed and synthesized in this work, namely PFA-C-8-b-PMAPS and P(FA-C-8-ran-MAPS). Synthesized polymers were characterized by H-1 nuclear magnetic resonance and differential scanning calorimetry (DSC) measurements, proving the achievement of copolymers without residual PFA-C-8. The molecular aggregation structure of FA-C-8 in PFA-C-8-b PMAPS and P(FA-C-8-ran-MAPS) was revealed by DSC and wide-angle X-ray diffraction measurements. On one hand, the PFA-C-8 segments in P(FA-C-8-b-MAPS) formed hexagonal packing with lamellar structures. On the other hand, although the lamellar structure is not observed in P(FA-C-8-ran-MAPS) samples, the hexagonal packing of FA-C-8 exhibited higher thermal stability than that of those in the PFA-C-8 sample. Moreover, the polymeric film of P(FA-C-8-ran-MAPS) exhibited strong oleophobicity under both air and water conditions.

[发布日期] 2021-09-16