基于壳聚糖/聚乙烯醇/二氧化钛修饰的硝酸纤维素复合膜研究  

Study on nitrocellulose composite membrane modified by chitosan/polyvinyl alcohol/titanium dioxide

作　　者：洪逸斌 李文祥 王红梅 李桂水 HONG Yi-bin;LI Wen-xiang;WANG Hong-mei;LI Gui-shui(Tianjin University of Science and Technology,Tianjin Key Labooratory of Integrated Design and On-Line Monitoring for Light Industry&Food Machinery and Equipment,Tianjin 300222,China)

机构地区：[1]天津科技大学机械工程学院天津市轻工与食品工程机械装备集成设计与在线监控重点实验室,天津300222

出　　处：《应用化工》2023年第2期366-371,共6页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(21276195)。

摘　　要：通过负压抽滤的方法将壳聚糖(CS)、聚乙烯醇(PVA)与二氧化钛(TiO_(2))的修饰液涂覆到纯硝酸纤维素膜的表面,制备硝酸纤维素复合膜,研究膜在微观结构、元素分布与组成、浸润性等方面的性能。结果表明,制备的新型膜具有超亲水/水下超疏油特性,过滤柴油乳液通量为5867.3 L/(m^(2)·h),除油率为99.4%,在强酸碱性、高盐度环境下的油水分离实验时,过滤通量无明显衰减,除油率可保持98.9%以上,具有优良的稳定性和耐腐蚀性。Based on the pure nitrocellulose membrane,a certain amount of chitosan,polyvinyl alcohol(PVA)and titanium dioxide(TiO_(2))modified solution was coated on the surface of the cellulose membrane by the method of negative pressure filtration,so as to complete a new method of oil-water separation membrane preparation.The microstructure,element distribution and composition and wettability of the new membrane were studied to determine the best process parameters for preparing the composite membrane.The results showed that the new membrane prepared for the super hydrophilic/super hydrophobic characteristics.The filtered oil lotion flux was 5867.3 L/(m^(2)·h)and the oil removal rate was 99.4%.The filtration flux in oil and water separation experiments under strong acid base and high salinity environment didn’t significantly decline,and the oil removal rate could be maintained over 98.9%,it has excellent stability and corrosion resistance.

关 键 词：壳聚糖 二氧化钛 聚乙烯醇 超亲水/水下超疏油 油水分离 

分 类 号：TQ02[化学工程] TQ