“…Among the various modifying routes and techniques, soap-free emulsion polymerization because of its environmental friendliness and high efficiency, has been widely accepted as one of the modifying routes [9][10][11][12][13]. In our previous researches, a novel and facial soap-free emulsion polymerization method was developed by using caprolactam modified casein as emulsifying component and stabilizer since it's proved having good emulsifying ability for acrylate monomers thus can improve the stability of as-prepared latex particles.…”