filtrated emulsion with 0.45 μm nylon membrane. These nanoparticles were believed to adhere onto the surface of cotton/nylon fibers by electrostatic and physical interactions. The Chitosan nanoparticles in the emulsion cumulated onto the surface of cotton/nylon aggregated together during drying and finally formed a rough film, promising a huge surface area that could be useful in the dyeing process. Chitosan has the same backbone with cellulose except for its acetamide group instead of a hydroxyl group. The PH of the emulsion of the anoparticles is more favorable for the carboxyl groups to confer negative charge, which attracted more positive charged chitosan nanoparticles to form a thicker film. More spaces were included in the structure as revealed in the SEM images (Figure 3).