Preparation and Oil-water Separation Performance of Superhydrophobic Porous Organic Polymers
A superhydrophobic porous organic polymer denominated as LNU-40 was synthesized via a Suzuki coupling reaction of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-N,N-bis[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]aniline,3,6-dibromocarbazole,tetrakis(triphenylphosphine)-palladium,and N,N-dimethyl-2-(piperazin-1-yl)benzamide oxalate.LNU-40 possesses a specific surface area of 32 m2/g and manifests thermal stability.Dissolution or decomposition does not occur when it is dispersed in commonly encountered organic solvents.LNU-40 is characterized by a low surface energy and a water contact angle of 152.4°,demonstrating excellent resistance to acidic and alkaline environments.This property enables the fabrication of a superhydrophobic surface with outstanding self-cleaning capabilities.The superhydrophobic flexible fabric prepared with LNU-40 achieves a separation efficiency of over 90%for organic solvents and exhibits an oil adsorption capacity ranging from 3 to 8 times of its own mass.The superior adsorption and separation performance make it suitable for the treatment of oily wastewater containing organic solvents in industries such as petrochemicals,food,and pharmaceuticals.