Recently, much attention has been paid to underwater superoleophobic surfaces for their great potential in the industry. However, the large-scale practical utilization of the current underwater superoleophobic coatings is mainly limited by their complex and expensive fabrication processes and poor physical and chemical durability. Consequently, we fabricated a bioinspired superhydrophilic and underwater superoleophobic poly(vinyl alcohol)/montmorillonite composite surface by a facile, green process. This composite surface demonstrated excellent anti-wax and self-cleaning properties. The outstanding mechanical and chemical stabilities of this surface allowed it to retain its underwater superoleophobicity after 50 cycles of sandpaper abrading or prolonged immersion in corrosive solutions. Additionally, stainless steel mesh coated with this composite surface could separate various oil/water mixtures, including emulsions, driven only by gravity with an ultrahigh separation efficiency (>99.2%). Furthermore, the coated mesh achieved an extremely high separation efficiency of 98.6% and a separation flux of 37 098.6 L m−2 h−1 following 30 separation cycles. This multifunctional composite surface holds tremendous promise for large-scale practical applications.
Guangyan Wang,Tianyi Zhao,Lie Chen,Kesong Liu,Ruochen Fang,Mingjie Liu
Porous polymers are of great interest in potential energy storage and environmental remediation applications. However, traditional fabrication methods are either time-consuming or energy-consuming and deteriorate the mechanical strength of polymer materials. In this study, polymerization-induced phase separation was used to realize the template-free fabrication of superflexible macroporous polymers. Since the solvent is also used as a porogen, this method can be widely used to synthesize several porous polymers by carefully choosing the solvent and monomer. Compared to nonstructured polymers, the prepared macroporous polymers exhibited enhanced mechanical strength, superflexibility, multicompressibility, and bending properties. Along with hydrophobicity/oleophilicity and macroporous structures, the as-prepared porous polymers demonstrated controllable oil absorbability and release; furthermore, after infusing with lubrication liquid, these materials can be used as antiwaxing materials. The elastic porous polymers prepared using this simple and universal method show great potential for various applications, including controlled drug release, antiwaxing, and lubrication.
危险品化学品经营许可证（带存储）