State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China; College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China.
State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China; College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China.
J Colloid Interface Sci. 2021 Jun 15;592:87-94. doi: 10.1016/j.jcis.2021.02.043. Epub 2021 Feb 16.
The occurrence of membrane fouling has resulted in limited wastewater treatment applications. The development of superhydrophilic-underwater superoleophobic materials has received significant attention owing to their good anti-fouling properties. However, to fabricate such materials need costly regents and tedious steps. Thus, developing a one-step process to prepare a low-cost material for oil/water separation is still desired. In this study, bio-inspired from an arachnid, inorganic carbon nanotube stainless steel meshes (CNT@SSMs) having superhydrophilic-underwater superoleophobic and excellent anti-fouling properties and a unique fiber structure were fabricated via a one-step thermal chemical vapor deposition method. The CNT@SSMs had a small pore size enabling a high water flux of 10,639 L mh and the separation of oily wastewater, including various emulsions, at a high rejection ratio of >98.89%. As a result of its excellent chemical stability under high temperatures, a broad pH range, and saline environments, the CNT@SSM has the potential to be used in extreme conditions. In summary, these CNT@SSMs are easy to fabricate and are low-cost as a result of inexpensive reagents involved. Moreover, these novel superwetting membranes are promising candidates for treatment of hazardous oily wastewater.
膜污染的发生限制了废水处理的应用。由于具有良好的抗污染性能，超亲水-水下超疏油材料的开发受到了广泛关注。然而，制造这种材料需要昂贵的试剂和繁琐的步骤。因此，开发一种一步法来制备低成本的油水分离材料仍然是人们所期望的。在这项研究中，受节肢动物的启发，通过一步热化学气相沉积法制备了具有超亲水-水下超疏油和优异抗污染性能以及独特纤维结构的无机碳纳米管不锈钢网（CNT@SSMs）。CNT@SSMs 的孔径较小，水通量高达 10639 L mh，可高效分离各种乳液在内的含油废水，分离率>98.89%。由于 CNT@SSM 在高温、宽 pH 值和盐环境下具有优异的化学稳定性，因此有望在极端条件下使用。总之，这些 CNT@SSMs 易于制造，且由于使用了廉价的试剂，成本低廉。此外，这些新型超润湿膜是处理危险含油废水的有前途的候选材料。
