2018 Volume 64 Issue 5 Pages 127-131
Two types of atmospheric pressure plasma jet (APPJ) treatment were used to prepare the polyester fabric with asymmetric wettability, and then the wettability stability of the prepared fabric was examined. We investigated to make an asymmetric fabric by two methods using the APPJ treatments, and adopted the following method: After both sides of a polyester fabric were treated by the APPJ-coating, one side was subsequently treated by the APPJ-oxidation. The water contact angles on both sides of the prepared fabric were measured to be 150° and 20°. The hydrophobic and hydrophilic stability of both sides was excellent for 7 days. From surface analyses, the granular surface morphology of deposited SiO2 films was observed on the APPJ-coated side of the polyester fabric, which caused water repellency. Silanol groups were produced after the subsequent APPJ-oxidation, which contributed to hydrophilicity. It was confirmed by the horizontal water spreading that the polyester fabric with an asymmetric wettability was successfully prepared.
