Preparation of low adhesion antibacterial coating based on electrophoretic deposition
Vinyl silicone oil(Vi-PDMS)modified polyacrylate was prepared from methyl methacrylate(MMA),butyl acrylate(BA),dimethylaminoethyl methacrylate(DMAEMA),hydroxypropyl methacrylate(HPMA),and Vi-PDMS,and then blended with hexamethylene diisocyanate trimer(HDIT)curing agent.The mixture,after crosslinking and curing under electrophoretic deposition by which cationic resin drove the functional monomers to move selectively to the cathode surface for reaction with hydroxyl groups and deposition,nanosilver antibacterial agent was further loaded to obtain a coating with both low adhesion and bactericidal functions.The dual functional coating was then characterized and analyzed by FTIR,1HNMR,SEM,and the water contanct angle and sliding angle of the coating were tested by optical contact angle meter,followed by evaluation on its antibacterial adhesion and bactericidal performance.The results showed that the coating exhibited low adhesion and bactericidal functions with excellent oil,dirt,bacteria and pig blood adhesion resistance.The anti-bacterial adhesion rate of the coating against E.coli and S.aureus exceeded 99.9%.Even after exposure to extreme conditions such as strong acid,strong alkali,and 3000 cycles of friction,the coating surface still maintained excellent anti-liquid adhesion effect.