Crosslinked Facilitated Transport Membranes Based on Carboxymethylated NFC and Amine-Based Fixed Carriers for Carbon Capture, Utilization, and Storage Applications

Abstract

Herein, we report the performances of crosslinked facilitated transport membranes based on carboxymethylated nanofibrils of cellulose (cmNFC) and polyvinylamine (PVAm) with the use of 3-(2-Aminoethylamino) propyltrimethoxysilane (AEAPTMS) as second fixed carrier for CO2 selectivity and permeability. The grafting of AEAPTMS on cmNFC was optimized by following the hydrolysis/condensation kinetics by 29Si Nuclear Magnetic Resonance (NMR) analyses and two different strategies of the process of membrane production were investigated. In optimized conditions, around 25% of the -COOH functions from cmNFC have crosslinked with PVAm. The crosslinked membranes were less sensitive to liquid water and the crystallinity of PVAm was tuned by the conditions of the membrane elaboration. In both processes, CO2 selectivity and permeability were enhanced especially at high water vapor concentration by the use of PVAm and AEAPTMS suggesting the existence of a facilitation effect due to amine-CO2 interaction, while the mechanical integrity of the swollen membranes remained intact.

Biogas upgrading with novel cellulose nano-crystals and polyvinyl amine nanocomposite membranes

“…The Crystalline Nano cellulose (CNC) has been used in this research due to its high affinity with water and reinforcing nature [13,[24][25][26][27]. Cellulose fibers have hierarchical microstructures and on acid hydrolysis give nanostructure of highly crystalline regions (CNC) and amorphous regions (CNF) [13,[28][29][30].…”

Effect of Mobile Carrier on the Performance of PVAm–Nanocellulose Facilitated Transport Membranes for CO2 Capture

“…In recent years, another approach has also been considered that uses nanofillers in order to give the membrane the needed strength and increase permselective efficiency. Graphene-and silica-based nanofillers [25][26][27] as well as carbon nanotubes [28][29][30] and metal-organic frameworks (MOFs) [31] were considered for this purpose along with, more recently, nanocellulose in forms of fibers or nanocrystals [19,[32][33][34][35][36][37][38].…”