Structural control of cellulose nanofibrous composite membrane with metal organic framework (ZIF-8) for highly selective removal of cationic dye

Younghan Song; Jin Young Seo; Hyungsup Kim; Kyung-Youl Beak

doi:10.1016/j.carbpol.2019.115018

Structural control of cellulose nanofibrous composite membrane with metal organic framework (ZIF-8) for highly selective removal of cationic dye

Carbohydr Polym. 2019 Oct 15:222:115018. doi: 10.1016/j.carbpol.2019.115018. Epub 2019 Jun 22.

Authors

Younghan Song¹, Jin Young Seo², Hyungsup Kim³, Kyung-Youl Beak⁴

Affiliations

¹ Department of Organic and Nano System Engineering, Konkuk University, Seoul, 05029, Republic of Korea; Materials Architecting Research Center, Korea Institute of Science Technology, Seoul 02792, Republic of Korea.
² Materials Architecting Research Center, Korea Institute of Science Technology, Seoul 02792, Republic of Korea; Department of Chemical and Biological Engineering, Korea University, 5-1 Anam-dong, Seongbuk-gu, Seoul 136-713, Republic of Korea.
³ Department of Organic and Nano System Engineering, Konkuk University, Seoul, 05029, Republic of Korea. Electronic address: iconclast@konkuk.ac.kr.
⁴ Materials Architecting Research Center, Korea Institute of Science Technology, Seoul 02792, Republic of Korea; Division of Nano & Information Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea; Center for Convergent Chemical Process, Korea Research Institute of Chemical Technology, 141, Gajeong-Ro, Yuseong-Gu, Daejeon 34113, Republic of Korea. Electronic address: baek@kist.re.kr.

PMID: 31320094
DOI: 10.1016/j.carbpol.2019.115018

Abstract

Highly durable cellulose nanofibrous composite membranes were prepared by in-situ growing of zeolitic imidazolate frameworks (ZIF-8) as spacers in the presence of TEMPO oxidized cellulose nanofibers (TOCN) as their anchoring points. The obtained composite membranes showed three-dimensionally networked nanofibers with ZIF-8 to generate porous structures, which gave high durability without critical compaction of the membrane under pressure (1∼3 bar). The 20 μm thick ZIF-8/TOCN membrane showed most superior water flux (84 Lm^-2 h^-1 bar^-1) without critical flux drop for 24 h operation. Interestingly, the composite membrane exhibited highly selective removal of cationic dyes in the presence of anionic dyes due to strong interaction through negatively charged TOCN networks. The experimental results in the study reveal a novel strategy for durable cellulose nanofibrous membrane via introduction of metal organic frameworks for highly selective filtration.

Keywords: Cellulose nanofiber; Durability; Membrane; Selective dye removal; ZIF-8.