Fiber-Supported Biocidal Porous Organic Polymer with High-Density N-Halamine Structures for Chlorine Rechargeable Water Disinfection

Disinfecting pathogenic microorganisms in water streamsefficientlyand massively is still a big challenge in point-of-use situations.Nowadays, available technologies are still suffering from irreversibleconsumption of disinfectants, production of carcinogenic byproducts,and high filtration resistance. Herein, we designed a chlorine rechargeablefiber-supported biocidal porous organic polymer (i.e., FPOP) accordingto a surface-activated in situ condensation methodology on cottonfibers. The presence of secondary amines in the FPOP enables it tobe chlorinated to form N-halamine structures aftertreating it with a diluted chlorine bleach solution, allowing theFPOP to perform a potentially rapid and robust biocidal activity.The chlorinated FPOP, which possessed the combination of interfibermacropores and intrinsic meso/micropores from the porous organic polymer,showed a high specific surface area, large and rechargeable activechlorine content (& SIM;7000 ppm), long-term stability, efficientbiocidal activity (>99.9999% bacteria reduction within 1 min ofcontact),and desirable filtration flux (>2000 L/m(2) h). The successfulfabrication of FPOP indicated the promise of applying it as a filtrationmaterial for point-of-use water disinfection with superior killingcapacity, high filtration flux, and low cost.