Improved Hydrophilic Property by Water Plasma
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Water plasma can be used to turn a hydrophobic surface to a hydrophilic surface. Water plasma contains free radicals of H2, O2, OH and H2O. The hydrogen can modify the surface with more C-H bond, whereas OH and H2O can increase the OH group, thus enhance the hydrogen bond and become a hydrophilic surface. The material can be treated as follows: Water vapor from a hot water vessel is passed to the plasma chamber continuously. The pressure of the chamber is maintained at 200 mt, and power density is 0.15 watts/cm2 . A TEFLON* strip (3/4" x 2.5" x 1/8") with well polished surface is laid inside the chamber. After a half hour's treatment, the TEFLON is taken out. * Trademark of E. I. du Pont de Nemours & Co.