Preparation of Polyaniline/Titanium Dioxide Modified Membranes and Their Performances in Dyeing Wastewater Treatment
In-situ oxidative polymerization was adopted to prepare polyaniline/titanium dioxide modified membranes with titanium dioxide as the filler,aniline as the monomer,and polytetrafluoroethylene membrane as the base.The modified membranes were characterized with FTIR,SEM,and contact angle goniometry.Treatment efficiencies of the membranes for methyl orange before and after modification were compared.The findings were as follows:the polyaniline and the titanium dioxide were successfully deposited on the surface of PTFE membrane;the dispersibility of titanium dioxide was promoted and no significant phase separation was observed;the hydrophilicity of modified membrane was improved and its water flow was of 380 L/(m2·h);the treatment efficiencies of methyl orange were up to 83%;after five cycles of regeneration,the treatment ef-ficiencies of methyl orange remained above 70%.
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