Patent ID: 9144824
Filing Date: 2015-09-29
Classification: B05D,Y10T

Abstract:
1. A method of modifying a substrate surface by plasma-induced graft polymerization, comprising: treating an inorganic substrate with (a) an atmospheric pressure (AP) plasma and (b) an ethylenically unsaturated monomer or monomer solution, further comprising cleaning the inorganic substrate and conditioning the inorganic substrate for a desired length of time prior to treating the inorganic substrate with the AP plasma, wherein conditioning the inorganic substrate results in formation of a layer of adsorbed water on the inorganic substrate, wherein treating the inorganic substrate with the AP plasma comprises flowing the AP plasma towards the inorganic substrate, on which there is the layer of adsorbed water, to form active sites on the inorganic substrate, wherein flowing the AP plasma is carried out using a plasma jet, and wherein treating the inorganic substrate with the ethylenically unsaturated monomer or monomer solution forms polymer chains covalently and terminally bound to the inorganic substrate, and a spacing of the polymer chains on the inorganic substrate is in the range of 5 nm to 50 nm.