聚苯胺/二氧化钛改性膜的制备及其印染废水处理性能

Preparation of Polyaniline/Titanium Dioxide Modified Membranes and Their Performances in Dyeing Wastewater Treatment

采用原位氧化聚合法,以二氧化钛为填料、苯胺为单体、聚四氟乙烯膜为基底膜制成聚苯胺/二氧化钛/聚四氟乙烯改性膜;采用傅里叶红外光谱(FTIR)、扫描电子显微镜(SEM)、接触角测试等对改性膜的结构和形貌进行表征,并考察改性前后膜对甲基橙的处理效率。结果表明:聚苯胺和二氧化钛成功固载到基底膜表面,二氧化钛分散均匀且无明显的相分离,改性膜的亲水性提高,纯水通量增加到380 L/(m^(2)·h),对甲基橙的处理效率达到83%,且经过5次再生循环后,处理效率仍然大于70%。

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/(m^(2)·h);the treatment efficiencies of methyl orange were up to 83%;after five cycles of regeneration,the treatment efficiencies of methyl orange remained above 70%.