PLASMA POLYMERIZATION ENHANCEMENT OF SURFACE OF METAL FOR USE IN REFRIGERATING AND AIR CONDITIONING

摘要

PURPOSE: Provided is a plasma polymerization for forming a polymer with hydrophilicity or hydrophobicity on a surface of a material by using a DC discharge plasma or an RF discharge plasma. CONSTITUTION: A method for surface processing by plasma polymerization of a surface of a metal, for enhancing its usefulness in a refrigerating and air-conditioning apparatus by using a DC discharge plasma, comprises the steps of: (a) positioning an anode electrode which is substantially of a metal to be surface-modified and a cathode electrode in a chamber; (b) maintaining a pressure in the chamber at a predetermined vacuum level; (c) blowing a reaction gas comprising an unsaturated aliphatic hydrocarbon monomer gas at a predetermined pressure and a non-polymerizable gas at a predetermined pressure into the chamber, the non-polymerizable gas being 50-90% of the entire reaction gas; and (d) applying a voltage to the electrodes in order to obtain a DC discharge, whereby to obtain a plasma consisting of positive and negative ions and radicals generated from the unsaturated aliphatic hydrocarbon monomer gas and the non-polymerizable gas, and then forming a polymer with hydrophilicity on the surface of the anode electrode by plasma deposition.