超亲水碱激发矿渣/铜网复合膜的低成本制备及其油水分离性能

LOW-COST PREPARATION OF SUPER-HYDROPHILIC ALKALI-ACTIVATED SLAG/COPPER MESH COMPOSITE MEMBRANE AND ITS OIL-WATER SEPARATION PERFORMANCE

超亲水膜在油水分离中受到了广泛关注,但仍受到成本高、制备过程复杂、稳定性弱的限制。以低成本、绿色环保的矿渣固体废弃物为原料,通过简单的“涂层-固化”工艺制备了超亲水的碱激发矿渣铜网复合膜,并考察了制备工艺条件对膜性能的影响。结果表明,最佳条件下制备的膜在重力条件下的水通量为126.97 L/(m^(2)·h),对十六烷等多种乳液的分离效率均超过99%,对十六烷乳液进行连续10次分离循环后效率保持在99.30%以上。超亲水性和水下疏油性使膜具有良好的自清洁性,并在恶劣条件下仍能保持较高的稳定性和分离效率。

Super-hydrophilic membranes have been widely concerned in oil-water separation,but they are still limited by high cost,complex preparation process and weak stability.In this study,a super-hydrophilic alkali-excited slag/copper mesh composite membrane was prepared by a simple“coating-curing”process using low cost,green slag solid waste as raw material,and the effects of the preparation process conditions on the membrane performance were investigated.The results showed that the water flux of the optimal membrane under gravity conditions was 126.97 L/(m^(2)·h),and the separation efficiency of cetane and other emulsions was more than 99%,and the efficiency of cetane emulsion was maintained above 99.30%after 10 consecutive treatments.The super hydrophilicity and hydrophobicity make the membranes have good self-cleaning,and can maintain high stability and separation efficiency even under harsh conditions.