不锈钢网负载Al-beta分子筛涂层的制备及其在油水分离中的应用  

Fabrication of stainless steel mesh supported zeolite Al-beta coatings for oil/water separation

作　　者：尚茜子 张宝泉[1] 李雲 SHANG Xizi;ZHANG Baoquan;LI Yun(State Key Laboratory of Chemical Engineering,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China)

机构地区：[1]化学工程联合国家重点实验室天津大学化工学院

出　　处：《化工学报》2019年第10期3994-4001,共8页CIESC Journal

基　　金：国家自然科学基金项目(21136008)

摘　　要：使用二次生长法在不锈钢网表面制备了Al-beta分子筛涂层,并通过扫描电镜、X射线衍射和接触角检测对其进行了表征。Al-beta分子筛晶粒以球形呈现在不锈钢网表面,并相互交联而构成微纳双级粗糙结构,Albeta涂层表现出超亲水和水中超疏油性质。将不锈钢网负载Al-beta分子筛涂层用于分离一系列油水混合物,并考察了其耐久性和稳定性。实验结果表明,不锈钢网负载Al-beta分子筛涂层在重复使用100次后其正己烷/水分离效率仍保持在97.1%以上,酸、碱和超声等处理对其形貌和油水分离效率几乎没有影响,具备优异的耐久性、自清洁性和稳定性,在实际油水分离过程中有很大应用潜力。The zeolite Al-beta coating was fabricated on the stainless steel mesh by secondary growth method. Scanning electron microscopy (SEM),X-ray diffraction (XRD) and contact angle (CA) measurements were used to characterize the zeolite Al-beta coatings.The cross-linked zeolite Al-beta crystals with spherical morphology on the stainless steel mesh constituted a micro/nanoscale hierarchical structure.The as-synthesized stainless steel mesh supported zeolite Al-beta coatings exhibited superhydrophilic and underwater superoleophobic characteristics.The stainless steel mesh supported zeolite Al-beta coating was applied to the separation of various oil/water mixtures.It could maintain the high separation efficiency above 97.1% after 100 separation cycles.The stability of zeolite Al-beta coatings was checked by using corrosive and ultrasonic treatments.The treated stainless steel mesh supported zeolite Al-beta coatings exhibited almost the same surface morphologies and separation efficiencies as the untreated sample.In addition,the zeolite Al-beta coating displayed a strong attachment to the stainless steel mesh surface.Self-cleaning stainless steel mesh supported zeolite Al-beta coatings with superior durability and stability would show great application potentials in actual oil/water separation processes.

关 键 词：膜 表面 不锈钢网 Al-beta沸石 超亲水 水中超疏油 油水分离 稳定性 

分 类 号：TQ028.8[化学工程]