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PROCESS FOR APPLYING A SOLUTION TO A POLYMERIC MESH MATERIAL; HYDROPHYLIC COATING AND TITANIUM DIOXIDE TRANSLUCID; AND PROCESS TO APPLY A HYDROPHILIC COATING TO THE SURFACE OF A SUBSTRATE
PROCESS FOR APPLYING A SOLUTION TO A POLYMERIC MESH MATERIAL; HYDROPHYLIC COATING AND TITANIUM DIOXIDE TRANSLUCID; AND PROCESS TO APPLY A HYDROPHILIC COATING TO THE SURFACE OF A SUBSTRATE
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机译：将溶液应用于聚合物网状材料的过程;亲水涂层和二氧化钛过氧化物;底物表面涂亲水涂层的方法和步骤
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摘要
A process for treating the surfaces of a polymeric mesh material for use as a separator in an electrochemical cell between an anode and a membrane to obtain a hydrophilic coating comprises (a) removing surface contaminants from the mesh material; (b) contacting the polymeric mesh material with an aqueous acidic titanium halide solution made by mixing together water, a surfactant, titanium halide and an acid collected from HCl, HBr, HF to form an intermediate acidic titanium halide solution and then adding an alkali metal hydroxide to this solution until the pH is about 3.0 to about 4.0; (c) drying the titanium halide solution onto the surface of the polymeric mesh material to form a coating thereon; and (d) converting the coating to a titanium dioxide layer by contacting the coating with an oxidizing agent such as sodium hypochlorite, calcium hypochlorite, hydrogen peroxide and chlorine dioxide. A hydrophilic coating is obtained without the traditional addition of a surfactant to the electrolyte or coating the separator's polymeric surfaces with a surfactant.
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