Method for forming superhydrophilic oxide film on pure titanium surface

Abstract

The present disclosure relates to a method for forming a superhydrophilic oxide film on a pure titanium surface, and has the effect capable of realizing superhydrophilicity with a contact angle of 20° or less by optimizing time and voltage under anodization treatment conditions.

What is claimed is: 
     
         1 . A method for forming a superhydrophilic oxide film on a titanium surface, the method comprising the steps of: polishing the titanium (Ti) surface (step 1); and anodizing polished titanium (Ti) at 10 to 110 V for 1 to 30 minutes to form an oxide film on the titanium surface (step 2). 
     
     
         2 . The method of  claim 1 , wherein titanium is pure titanium of any one of Ti grades 1 to 4 having a Ti content of 99 wt. % or more. 
     
     
         3 . The method of  claim 1 , wherein the polishing in the step 1 is one or more of electrochemical polishing and chemical polishing. 
     
     
         4 . The method of  claim 1 , wherein the anodized electrolyte in the step 2 is a mixture of NH 4 F, water, and ethylene glycol. 
     
     
         5 . The method of  claim 1 , wherein the step 2 is anodizing polished titanium (Ti) at 90 to 110 V for 5 to 15 minutes. 
     
     
         6 . The method of  claim 5 , wherein the step 2 is anodizing polished titanium (Ti) at 95 to 105 V for 7 to 13 minutes. 
     
     
         7 . The method of  claim 6 , wherein the step 2 is anodizing polished titanium (Ti) at 99.5 to 102 V for 9.5 to 11 minutes. 
     
     
         8 . The method of  claim 7 , wherein the superhydrophilic oxide film has superhydrophilicity with a contact angle of 20° or less. 
     
     
         9 . Titanium on which a superhydrophilic oxide film prepared by the method of  claim 1  is formed. 
     
     
         10 . Titanium on which an oxide film having a surface roughness value of an average roughness of 15 or more and a root mean square roughness (RMS) of 20 or more prepared by the method of  claim 1  is formed. 
     
     
         11 . A medical device containing titanium manufactured by the method of  claim 1 . 
     
     
         12 . A biotransplantation material containing titanium manufactured by the method of  claim 1 . 
     
     
         13 . An aviation part containing titanium manufactured by the method of  claim 1 . 
     
     
         14 . An aerospace part containing titanium manufactured by the method of  claim 1 . 
     
     
         15 . A precision machine part containing titanium manufactured by the method of  claim 1 . 
     
     
         16 . A plant part containing titanium manufactured by the method of  claim 1 .