Abstract:A series of cationic acrylate latex were prepared with n-butyl acrylate (BA), methyl methacrylate (MMA), acrylamide (AM), methacryloyloxyethyl-trimethyl ammonium chloride (DMC) as monomer and the influences of stirring speed, monomers ratio, amount of emulsifier and initiator on the latex polymerization were studied. Results show that, when the stirring speed is 400 r/min, m(BA)∶m(MMA)=30∶70, the mass fractions of OP-10 and AIBI are 4.5% and 1% of the monomer respectively, the obtained emulsion system is stable and the films formed from the emulsion are excellent. Besides, the properties of cationic acrylate films on microalgae cultivation were investigated. Results show that films remain intact in microalgae culture medium after 10 d of culture, and the strength and toughness of film also keep well. The microalgae could grow rapidly attached to the surface of film and the microalgae biomass is positively correlated with the film surface parameters, such as the roughness and amount of charge. The above results provide a new idea and method for finding and preparing the films using in microalgae cultivation, it would be helpful in the design of novel copolymer for a potential adherence material to cultivating microalgae.