PDMS-Coated Hypercrosslinked Porous Organic Polymers Modified via Double Postsynthetic Acidifications for Ammonia Capture

                             Dong Won Kang(통합과정)                                              Minjung Kang(통합과정)

A hypercrosslinked porous organic polymer was modified by post-oxidation and post-sulfonation to obtain a porous platform with high density of acidic groups. Such acidified material exhibits record high NH₃ adsorption capacity per surface area, fast adsorption rate, and recyclability at low desorption temperature. Noticeably, the coating of the polymer with PDMS represents a facile and efficient route to enable both significant improvement of low-pressure NH₃ capacity (~40-fold enhancement (0.04 to 1.41 mmol g^-1) with respect to non-modified polymer at 500 ppm) and hydrophobicity associated with the selective sorption of NH₃ over water vapor (hydrophilic for non-coated material). This material is easy to prepare, cost-effective, and scalable to mass production.

https://pubs.rsc.org/en/content/articlelanding/2018/sc/c8sc02640h#!divAbstract