Seong, Jong Geun Lee, Won Hee Lee, Jongmyeong Lee, So Young Do, Yu Seong Bae, Joon Yong Moon, Sun Ju Park, Chi Hoon Jo, Hye Jin Kim, Ju Sung Lee, Kueir-Rarn Hung, Wei-Song Lai, Juin-Yih Ren, Yi Roos, Conrad J. Lively, Ryan P. Lee, Young Moo 2024-01-19T13:33:54Z 2024-01-19T13:33:54Z 2022-01-10 2021-10 https://pubs.kist.re.kr/handle/201004/116331 In membrane-based separation, molecular size differences relative to membrane pore sizes govern mass flux and separation efficiency. In applications requiring complex molecular differentiation, such as in natural gas processing, cascaded pore size distributions in membranes allow different permeate molecules to be separated without a reduction in throughput. Here, we report the decoration of microporous polymer membrane surfaces with molecular fluorine. Molecular fluorine penetrates through the microporous interface and reacts with rigid polymeric backbones, resulting in membrane micropores with multimodal pore size distributions. The fluorine acts as angstrom-scale apertures that can be controlled for molecular transport. We achieved a highly effective gas separation performance in several industrially relevant hollow-fibrous modular platform with stable responses over 1 year. English American Association for the Advancement of Science Microporous polymers with cascaded cavities for controlled transport of small gas molecules Article 10.1126/sciadv.abi9062 1 Science Advances, v.7, no.40 Science Advances 7 40 Y scie scopus 000703091100024 2-s2.0-85116343708 Multidisciplinary Sciences Science & Technology - Other Topics Article INITIO FORCE-FIELD SURFACE FLUORINATION COMPOSITE MEMBRANES SEPARATION PERMEATION SORPTION HELIUM SIEVE HOLLOW-FIBER MEMBRANES REARRANGED POLY(BENZOXAZOLE-CO-IMIDE) MEMBRANES