武金龙,付玉坤,李郝琪,施冬梅,范瑞娟,张永兰,谭梦妍,王鹏.水下超疏油不锈钢网的制备及其油水分离性能研究[J].表面技术,2023,52(9):358-367.
WU Jin-long,FU Yu-kun,LI Hao-qi,SHI Dong-mei,FAN Rui-juan,ZHANG Yong-lan,TAN Meng-yan,WANG Peng.Preparation and Oil-water Separation Performance of Underwater Superoleophobic Stainless Steel Mesh[J].Surface Technology,2023,52(9):358-367 |
| 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 |
| 投稿时间：2022-07-13 修订日期：2022-12-13 |
| DOI：10.16490/j.cnki.issn.1001-3660.2023.09.032 |
| 中文关键词: 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 |
| 英文关键词:stainless steel mesh superhydrophilic underwater superoleophobic oil-water separation sepiolite carboxymethyl cellulose chitosan quaternary ammonium salt |
| 基金项目:宁夏自然科学基金(2019AAC03107);宁夏重点研发计划(2022BDE92037) |
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| Author | Institution |
| WU Jin-long | School of Materials Science & Engineering, Yinchuan 750021, China ;Key Laboratory of Polymer Materials and Manufacturing Technology,Yinchuan 750021, China ;International Scientific & Technological Cooperation Base of Industrial Waste Recycling and Advanced Materials, Yinchuan 750021, China |
| FU Yu-kun | School of Materials Science & Engineering, Yinchuan 750021, China ;Key Laboratory of Polymer Materials and Manufacturing Technology,Yinchuan 750021, China |
| LI Hao-qi | School of Materials Science & Engineering, Yinchuan 750021, China ;Key Laboratory of Polymer Materials and Manufacturing Technology,Yinchuan 750021, China |
| SHI Dong-mei | School of Materials Science & Engineering, Yinchuan 750021, China |
| FAN Rui-juan | School of Biological Science & Engineering, North Minzu University, Yinchuan 750021, China |
| ZHANG Yong-lan | School of Materials Science & Engineering, Yinchuan 750021, China |
| TAN Meng-yan | School of Materials Science & Engineering, Yinchuan 750021, China |
| WANG Peng | School of Materials Science & Engineering, Yinchuan 750021, China ;Key Laboratory of Polymer Materials and Manufacturing Technology,Yinchuan 750021, China |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 the stainless steel mesh. It could be seen from the SEM images that the coating was a micro/nano structure formed by a large number of regular and orderly shape spindle shaped particles with diameters of tens to hundreds of nanometers. As carboxymethyl cellulose and chitosan quaternary ammonium salt had different charges respectively, they were combined through charge action. The two molecular chains contained a large number of —COOH and —NR groups, which could coordinate with Fe3+, Mg2+, Ca2+ and other metal ions contained on the surface of stainless steel mesh and sepiolite nanoparticles. A combination of multiple actions led to the formation of these spindle shaped nanoparticles with regular and orderly shape and superhydrophilic/underwater superoleophobic coating. Thus, the micro/nano rough structure was formed and the surface roughness of the stainless steel mesh was greatly increased. The contact angle of water in air on the modified stainless steel mesh nearly reached 0°. Meanwhile, the contact angles of different kinds of oil (Toluene, Diesel oil, Kerosene, Petroleum ether, Hexane, Gasoline) underwater on the modified stainless steel mesh were more than 150°, even though after immersion in acid, alkali and salt corrosive solutions for 8 h and scratching for 20 times. The separation efficiency was more than 98% for different oil-water mixtures, and could be still greater than 97% after 20 cycles of separation and immersion in acid, alkali and salt solution corrosion immersion for 8 h. After 48 h culture with bacteria, it was found that the superhydrophilic/underwater superoleophobic modified stainless steel mesh had a good inhibitory effect on the growth of Staphylococcus aureus. This was beneficial to the separation material in preventing bacterial contamination and might help to reduce the number of bacteria in the separated water. Therefore, a novel superhydrophilic/underwater superoleophobic separation membrane material based on the stainless steel mesh with green and simple fabrication process for efficiently separating various oil-water mixtures is provided. |
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