水下超疏油不锈钢网的制备及其油水分离性能研究  

Preparation and Oil-water Separation Performance of Underwater Superoleophobic Stainless Steel Mesh

作　　者：武金龙[1,2,4] 付玉坤 李郝琪 施冬梅 范瑞娟 张永兰[1] 谭梦妍 王鹏 WU Jin-long;FU Yu-kun;LI Hao-qi;SHI Dong-mei;FAN Rui-juan;ZHANG Yong-lan;TAN Meng-yan;WANG Peng(School of Materials Science&Engineering,North Minzu University,Yinchuan 750021,China;Key Laboratory of Polymer Materials and Manufacturing Technology,North Minzu University,Yinchuan 750021,China;School of Biological Science&Engineering,North Minzu University,Yinchuan 750021,China;International Scientific&Technological Cooperation Base of Industrial Waste Recycling and Advanced Materials,Yinchuan 750021,China)

机构地区：[1]北方民族大学材料科学与工程学院,银川750021 [2]北方民族大学高分子材料及制造技术重点实验室,银川750021 [3]北方民族大学生物科学与工程学院,银川750021 [4]“工业废弃物循环利用及先进材料”国际科技合作基地,银川750021

出　　处：《表面技术》2023年第9期358-367,共10页Surface Technology

基　　金：宁夏自然科学基金(2019AAC03107);宁夏重点研发计划(2022BDE92037)。

摘　　要：目的利用简便工艺,得到具有抗菌和可循环性的油水混合物高效分离用水下超疏油不锈钢网(SSM)材料。方法将酸洗预处理后的不锈钢网依次浸入羧甲基纤维素、海泡石分散液和壳聚糖季铵盐溶液中改性处理,得到可高效分离油水混合物的水下超疏油不锈钢网。利用接触角测量仪、扫描电子显微镜和傅里叶变换红外光谱仪等设备对改性后不锈钢网的微观形貌结构、润湿性、稳定性、抑菌性以及油水分离效果进行了测试分析。结果改性后不锈钢网表面被成功地构筑了一层具有微/纳米级结构的绿色亲水涂层,在空气中水接触角可达到0°,水下对不同油的接触角都可达到150°以上(在经酸、碱、盐溶液腐蚀浸泡8 h及物理刮擦20次后依然如此);对于不同种类的油水混合物分离效率都可达到98%以上,经过20次循环分离及酸碱盐溶液腐蚀浸泡8 h后分离效率仍大于97%,且对于金黄色葡萄球菌具有良好的抗菌效果。结论通过浸涂与液相沉积方法简便环保地在不锈钢网表面构筑了具有抗菌性的水下超疏油涂层,对于多种油水混合物都表现出优异的分离性能,本研究为超亲水-水下超疏油分离材料低成本绿色简便制备提供了新的思路。Materials with superwetting surface coating based on metal mesh substrates have attracted a large number of research interests in recent years.Herein,an effective superhydrophilic/underwater superoleophobic modified stainless steel mesh(SSM)material was manufactured by a facile strategy.The underwater superoleophobic stainless steel mesh was prepared by simple process of dip coating and liquid phase deposition,which was modified by natural polymers and inorganic materials for efficient oil-water mixture separation and bacterial inhibition.The original stainless steel mesh cleaned with ethanol,acetone and deionized water was successively put into 2 mol/L hydrochloric acid solution for oxide layer removal treatment for 16 h,and then it was immersed in 0.5wt.%sodium carboxymethyl cellulose solution and 0.5wt.%sepiolite nanoparticles dispersion solution for 1 hour sequentially.Sepiolite nanoparticles were obtained from 200 mesh sepiolite powder after ball milling at 600 r/min for 6 hours.After drying at 60℃for 1 hour,the sample was immersed in 0.5wt.%chitosan quaternary ammonium salt solution for 1 hour to construct the superhydrophilic/underwater superoleophobic coating on the surface of stainless steel mesh.After drying at 60℃for 1 hour,the modified superhydrophilic/underwater superoleophobic stainless steel mesh was obtained.The water contact angle and underwater oil contact angle were measured by contact angle measuring instrument(JC2000D2).The chemical composition analysis was recorded on Fourier transform infrared spectroscopy(FTIR,WQF-520A)with KBr pellets.The micromorphology and the distribution of elements on the samples surface were measured by field emission scanning electron microscopes(SEM,Zeiss SIGMA500).The antibacterial property of the sample was tested by the bacteriostatic halo experiment.The oil-water separation performance of the sample was tested by the independently built separation device.After modification,a coating with micro/nano structure was successfully constructed on the surface of t

关 键 词：不锈钢网 超亲水 水下超疏油 油水分离 海泡石 羧甲基纤维素 壳聚糖季铵盐 

分 类 号：TB34[一般工业技术—材料科学与工程]