Al-Shatty Wafaa, Lord Alex M, Alexander Shirin, Barron Andrew R
Energy Safety Research Institute (ESRI), College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea, SA1 8EN Wales, U.K.
Centre for Nanohealth (CNH), College of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP Wales, U.K.
ACS Omega. 2017 Jun 6;2(6):2507-2514. doi: 10.1021/acsomega.7b00279. eCollection 2017 Jun 30.
The formation of materials with tunable wettability is important for applications ranging from antifouling to waterproofing surfaces. We report the use of various low-cost and nonhazardous hydrocarbon materials to tune the surface properties of aluminum oxide nanoparticles (NPs) from superhydrophilic to superhydrophobic through covalent functionalization. The hydrocarbon surfaces are compared with a fluorinated surface for wettability and surface energy properties. The role of NPs' hydrophobicity on their dynamic interfacial behavior at the oil-water interface and their ability to form stable emulsions is also explored. The spray-coated NPs provide textured surfaces (regardless of functionality), with water contact angles (θ) of 10-150° based on their surface functionality. The superhydrophobic NPs are able to reduce the interfacial tension of various oil-water interfaces by behaving as surfactants.
形成具有可调润湿性的材料对于从防污到防水表面等各种应用都很重要。我们报告了使用各种低成本且无害的碳氢化合物材料，通过共价功能化将氧化铝纳米颗粒（NPs）的表面性质从超亲水性调节为超疏水性。将碳氢化合物表面与氟化表面的润湿性和表面能性质进行了比较。还探讨了纳米颗粒的疏水性对其在油水界面的动态界面行为及其形成稳定乳液能力的作用。基于其表面功能，喷雾涂覆的纳米颗粒提供了具有纹理的表面（无论功能如何），水接触角（θ）为10 - 150°。超疏水纳米颗粒能够通过充当表面活性剂来降低各种油水界面的界面张力。
