• 关键词：氧化石墨烯  PVDF中空纤维膜表面改性  界面聚合  制备工艺条件优化  抗污染性能

• 基金项目：国家自然科学基金（No.51108094，51378129）；广东省自然科学基金（No.2015A030313494， 2017A030313321）；广东省高教厅-普通高校特色创新类项目（No.2016KTSCX035）

• 李冬梅
• 广东工业大学土木与交通工程学院, 广州 510006

• 江鹏
• 1. 广东工业大学土木与交通工程学院, 广州 510006;2. 上海市政设计研究总院佛山斯美设计院有限公司, 佛山 528200

• 叶挺进
• 佛山市水业集团有限公司, 佛山 528500

• 梁金玲
• 广东工业大学土木与交通工程学院, 广州 510006

• 李绍秀
• 广东工业大学土木与交通工程学院, 广州 510006

• 蒋树贤
• 广东工业大学土木与交通工程学院, 广州 510006

• 摘要：以氧化石墨烯（GO）与纳米二氧化钛（TiO₂）为改性剂，采用界面聚合法与抽滤吸附结合，对聚偏氟乙烯中空纤维超滤膜（简称原膜）进行表面改性，得到新型纳米改性膜（简称GO-TiO₂改性膜）.研究改性膜的制备工艺条件及其对腐殖酸（HA）的吸附截留性能与抗污染特性.结果表明：①最佳制备工艺条件为：钛酸丁酯 2 mL、GO 1 mg、间苯二胺 1%（质量分数）、间苯二胺浸泡时间8 min、均苯三甲酰氯 0.2%（质量分数）、均苯三甲酰氯浸泡时间10 min；②亲水性提高显著，亲水性表面为GO-聚酰胺-TiO₂复合结构，改性膜接触角由80.6°±1.8°下降到38.6°±1.2°；③抗污染性能提高明显.改性膜通量总衰减率由改性前的51.2%下降到35.6%，过滤周期约为原膜的2.5倍；反冲洗后膜通量恢复率由69%提高到96%.

• Abstract：The graphene oxide (GO) and nano-titanium dioxide (TiO₂) -coated membrane (for short GO-TiO₂ modified membrane) were prepared with polyvinylidene fluoride hollow fiber ultrafiltration membrane (for short PVDF membrane) as the raw material, GO and TiO₂ as the modifiers, by using the interface polymerization method combined with the pumping adsorption as the modification technology. The preparation conditions of the GO-TiO₂ modified membrane were investigated. The adsorption properties and interception behaviors of GO-TiO₂ modified membrane to humic acid (HA) and its antifouling characteristics were explored. The results show that:① The optimal preparation conditions were:butyl titanate 2 mL, GO 1mg, m-phenylenediamine 1%, the soak time in the m-phenylenediamine solution 8 mins, trimesoyl chloride 0.2%, the soak time in the trimesoyl chloride solution 10 min; ② The hydrophilicity of the PVDF membrane improved significantly. There is a special GO-polyamide-TiO₂ composite structure, which is hydrophilic, on the surface of the GO-TiO₂ modified membrane. The contact angle of the modified membrane decreased from 80.6°±1.8° to 38.6°±1.2°; ③ The antifouling properties were enhanced dramatically. The total flux decay rate of the GO-TiO₂ modified membrane decreased from the original 51.2% to 35.6%, and the filtration cycle is proximately 2.5 times that of the original PVDF membrane; The membrane flux recovery rate increased from 69% to 96% after backwashing.

• Key words：graphene oxide (GO)  surface modification of PVDF hollow fiber membranes  interfacial polymerization  the optimization of preparation conditions  antifouling performance

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