Ionic cross-linking of cellulose nanofibers: an approach to enhance mechanical stability for dynamic adsorption

Environmental Science and Pollution Research International
Muhammad MuqeetIck-Soo Kim

Abstract

Herein, we attempt to improve the mechanical stability of anionic functionalized cellulose nanofibers (a-CNF) having 1.25 mmol of carboxymethyl groups per gram of cellulose nanofibers (CNF). The a-CNF and cross-linked a-CNF (za-CNF) then used for water desalination in the continuous mode using a tubular adsorption column. It is worth mentioning that the za-CNF possess 40% degree of cross-linking provided better mechanical stability as the tensile strength improved from 3.2 to 5.2 MPa over a-CNF. The IR spectroscopy was used to confirm the success of chemical modifications. Upon ionic cross-linking, the BET surface area reduced from 13.53 to 7.54 m2·g-1 corresponds to a-CNF and za-CNF, respectively. Moreover, this research was extended to determine the dynamic adsorption capacities for a-CNF and za-CNF, which were found to be 21 and 10 mg·g-1 respectively at a flow rate of 5-mL·min-1 explained by Thomas model.

References

Mar 2, 2011·ACS Applied Materials & Interfaces·Katia RodríguezPaul Gatenholm
Aug 11, 2015·Carbohydrate Polymers·Mayakrishnan GopiramanIck Soo Kim
Jun 5, 2016·Carbohydrate Polymers·Mayakrishnan GopiramanKim Ick Soo
Jan 24, 2017·Nature Materials·William J Koros, Chen Zhang
Apr 4, 2017·Advanced Materials·Mingwei ZhuLiangbing Hu
Mar 1, 2018·Carbohydrate Polymers·Hossein YousefiAbolghasem Khazaeian
Oct 16, 2018·Carbohydrate Polymers·Jatin SethiJuho Antti Sirviö

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