Issue 10, 2020

Enhanced sieving of cellulosic microfiber membranes via tuning of interlayer spacing

Abstract

Functionally active membranes made of cellulosic microfibers (CMFs) have emerged as promising sorbents for the removal of nano-sized pollutants from water. The adsorption efficiency of these membranes has been increased through surface functionalization of pristine-CMFs using various chemistries. Still, until now, the produced materials consist of highly dense 2D networks that make the membranes inadequate as filters because of the very short interlayer spacing. Here, we report on novel tuned CMF functionalization procedures, namely carboxylation, phosphorylation, and methylation, that can overcome this problem by modulating the interlayer separation in the 2D membranes. To test our approach, fabricated nanolaminate membranes with grafted functional groups were subjected for the separation of metal ions, a dye and two drugs, and their separation efficiencies are being correlated with the degree of functionalization and tuned intercapillary spacing.

Graphical abstract: Enhanced sieving of cellulosic microfiber membranes via tuning of interlayer spacing

Supplementary files

Article information

Article type
Paper
Submitted
10 jun 2020
Accepted
12 aug 2020
First published
13 aug 2020

Environ. Sci.: Nano, 2020,7, 2941-2952

Enhanced sieving of cellulosic microfiber membranes via tuning of interlayer spacing

Z. Karim, S. Monti, G. Barcaro, A. Svedberg, M. A. Ansari and S. Afrin, Environ. Sci.: Nano, 2020, 7, 2941 DOI: 10.1039/D0EN00613K

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