Li Ruiqi, Zhang Guoli, Wang Jingfeng, Li Junqing, Zhang Chunhong, Wang Pengli
Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education , Harbin Engineering University , Harbin 150001 , China.
Langmuir. 2020 Jan 28;36(3):760-768. doi: 10.1021/acs.langmuir.9b03093. Epub 2020 Jan 14.
Intelligent materials with controlled wettability have caused widespread concern in various sewage applications. In this study, a smart pH-responsive polyaniline (PANI) coating has been synthesized in one step in aqueous media and coated on materials in common use, such as polyester mesh, cotton fabric, and sponge. The PANI coatings can switch their superwettability response to ambient pH and be used in continuous separation of oil-water-oil systems which are frequently found in actual oil leakage accidents. Moreover, bidirectional emulsion separation (water-in-oil and oil-in-water) can be realized on such a coating material. The coated sponge can be used as an oil adsorbent for invertible capture and release by changing pH. Based on excellent antifouling and recyclability, as well as the prominent chemical/mechanical stability, PANI coatings can be applied in actual oily wastewater treatment systems. It is anticipated that the coating materials will show promise in many applications because of the cost-effective and environmentally friendly aqueous media preparation procedure.
具有可控润湿性的智能材料在各种污水应用中引起了广泛关注。在本研究中，一种智能pH响应型聚苯胺（PANI）涂层已在水介质中一步合成，并涂覆在常用材料上，如聚酯网、棉织物和海绵。PANI涂层可以根据环境pH值切换其超润湿性响应，并用于连续分离实际漏油事故中常见的油-水-油体系。此外，在这种涂层材料上可以实现双向乳液分离（油包水和水包油）。涂覆的海绵可以用作油吸附剂，通过改变pH值进行可逆的捕获和释放。基于优异的抗污性和可回收性，以及突出的化学/机械稳定性，PANI涂层可应用于实际含油废水处理系统。由于采用了具有成本效益且环保的水介质制备工艺，预计这种涂层材料在许多应用中都将展现出前景。
