棉基Ti_(3)C_(2)T_(x)油水分离膜的制备及其性能

Preparation and performance of cotton based Ti_(3)C_(2)T_(x) oil-water separation membrane

为了开发工艺简单、可重复使用、油水分离效率高的棉基油水分离材料,以实现废旧棉织物的低能耗高附加值利用,通过超声波喷涂的方式将具有亲水性的柔性二维过渡金属碳/氮化物(MXene)纳米片施加于棉织物上,借助离子液体对棉纤维的溶胀作用以增加棉织物表面的粗糙度,进一步提高MXene在棉织物上的固载率,制备棉基MXene油水分离膜。借助扫描电镜和接触角测试仪等分析油水分离膜的表面形貌和润湿性能。对棉基MXene油水分离膜的油水分离效率、膜通量、耐酸碱性和可循环使用性进行了测试。结果表明:以棉织物为基体的MXene油水分离膜的分离效率最高,可达99.1%;10次重复实验后仍具有98.6%的分离效率;在pH值为1~13的范围内分离效率无明显变化,空气中水接触角为30°,保持了原棉织物80.1%的强力。

In order to develop cotton based oil-water separation materials with simple process,reusable and high oil-water separation efficiency,and to achieve utilization of waste cotton fabrics with low energy consumption and high added value,hydrophilic flexible MXene nano sheet was applied to cotton fabrics by ultrasonic spraying.With the swelling effect of ionic liquid on the cotton fiber,the surface roughness of cotton fabrics were increased,the fixed loading rate of MXene on cotton fabrics were further improved,and the oil-water separation membrane was prepared.The surface morphology and wettability of oil/water separation membrane were analyzed by scanning electron microscope and contact angle tester.The oil/water separation efficiency,flux,acid and alkali resistance and recyclability of oil/water separation membrane of MXene were tested to evaluate its performance stability in application.The results showed that the separation efficiency of MXene oil/water separation membrane based on cotton fabrics reached 99.1%and remained 98.6%after 10 repeated tests.The separation efficiency has no obvious change in the range of pH 1~13,the contact angle of water in the air is 30°,maintaining 80.1%of the strength of the original cotton fabric.