Construction and Properties Research for Porous Surface of Amphiphilic Styrene Copolymer

Abstract

The block copolymer PS-b-PMMA was prepared by atom transfer radical polymerization (ATRP). Amphiphilic copolymer could be formed by hydrolysis of the block copolymer at acidic conditions. The products were characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance spectro-scopy and gel permeation chromatography. The results illustrated the successful preparation of amphiphilic copolymer. The porous membranes were prepared by the breath figure method and characterized their surface morphology. The results showed that there was a regular and uniform porous morphology on the surface of the amphiphilic copolymer film. When the concentration of the polymer solution was 25 mg/mL, the pore size of the PS-b-PMAA copolymer membrane was about 1 nm. After immersing the polymer film in silicone oil for a period of time, the water contact angle reached 108.7°. The microbial adhesion test was used to study the adhesion of microporous membrane surface to microorganisms. The results showed that the surface of the oil film could effectively improve the antibacterial property of the polymer surface.