Abstract: The application of plasma in textiles desizing is paid more attention by more and more researchers, but little has been reported about the effect of treatment parameters of plasma on the properties of blended size film. Therefore, in this paper, He/O2 atmospheric pressure plasma jet (APPJ) is used to treat the blended size film of starch phosphate and poly (vinyl alcohol) (PVA). By changing the parameters (such as treatment time, O2 flux and treatment distance) to study the surface properties change of blended size film. The results show that with the increase in treatment time and O2 flux, the weight loss ratio of the film increased. And with the decrease in treatment distance, the weight loss ratio decreased. The weight loss is caused by plasma etching, which showing some size agents can be removed by plasma etching. The results of AFM and SEM analysis show that with the increase in treatment time, the surface of film is rougher. The results of XPS analysis indicate that oxygen-based functional groups increased for the plasma treated films.

Key words: atmospheric pressure blasma jet, starch phosphate, poly (vinyl alcohol) , etching