Regulating the Pore Polarity of Superhydrophobic Porous Organic Polymers to Enhance Their Adsorption Performance for Polar Solvents

The high toxicity and strong corrosiveness of polar organics pose a serious threat to ecosystem and human health. However， the non-polar pore environment of traditional porous organic polymers can not effectively separate polar organics in complex oil-water system， and its core limitation is the lack of specific interaction between the non-polar framework and polar solutes. In order to solve this problem， the CO group was introduced into the pores of aromatic porous organic polymers through Sonogashira-Hadihara coupling reaction， and the superhydrophobic porous organic polymer material LNU-28 with polar pores （water contact angle of 154.1（°）） was constructed. The results show that the superhydrophobic material coated with LNU-28 on polyester fabric can selectively recognize and separate polar organic compounds through hydrogen bond and dipole dipole interaction （intermolecular force）. The adsorption capacity of acetic acid （mass fraction 4.2%） is 21.3% higher than that of benzene （mass fraction 3.2%）， and it maintains structural integrity and functional stability under extreme conditions such as high temperature （100 ℃） andacid/base （pH 1~13）. The material not only has the oil-water separation efficiency greater than 90% and self-cleaning characteristics， but its polar framework realizes the accurate identification of polar pollutants through the selective adsorption mechanism， which is due to the synergistic effect of its multi-level micro nano structure and low surface energy components. This study provides a material solution with both separation efficiency and environmental tolerance for the efficient treatment of polar organics in complex oil-water system. By reasonably designing polar pores in the super hydrophobic framework， it provides a new idea for the development of new environmental functional materials.