Controllable synthesis of cellulose/methylene bisacrylamide aerogels for enhanced adsorption performance

Abstract

Cellulose‐based aerogels have been regarded as potential adsorbent materials because of their unique structural features and chemical stability. Herein, we prepared the composite aerogels containing cellulose and N,N′‐methylene bisacrylamide (MBA) using N‐methylmorpholine‐N‐oxide (NMMO) as a green solvent via a freeze‐drying process. Owing to the strong chemical interaction between CC bonds of MBA and the functional groups of cellulose, as‐obtained cellulose/MBA aerogels present favorable MBA‐induced thermal/mechanical stable three‐dimensional network structure, in which the abundant macroporous structure, low density and high porosity lead to a significantly enhanced adsorption capacity (260.31 mg∙g−1) toward congo red dye in aqueous solution compared with the pure cellulose aerogels. Moreover, the effect of the cellulose concentration and cross‐linking degree on the morphology and adsorption properties for cellulose/MBA aerogels was systematically investigated. This present work provides a low‐cost and environmental‐friendly synthesis method for designing the functionalization of cellulose‐based aerogel, which may be achieved the advanced performance in wastewater treatment.

Lightweight hydrophobic cellulose foam material with low density and high porosity applications in Cu (II) adsorption

“…The subsequent process of freeze‐drying to expel these water molecules in situ serves to augment pore size effectively. In this context, MBA is identified as a prime contender, boasting not only the hydrophilic group NH 2 but also two highly reactive CC groups 26–29 . Prior research has affirmed the capacity of these groups to orchestrate a three‐dimensional network with the polar OH group inherent in cellulose, earmarking MBA as a potent agent for hydrogel synthesis.…”

Facile preparation of agaraldehyde chitosan‐based composite beads as effectual adsorbent especially towards amido black

“…Many works have been reported on biomass/biopolymer‐based adsorbents using sodium alginate, carrageenan, chitosan (CHI), chitin, and cellulose; also amino based adsorbent has been employed as adsorbent in recent time 15 . Some of these biopolymers are used for the preparation of bio‐adsorbent due to presence of ionic groups like hydroxyl, carboxylic acid, aldehyde, amine, and sulfonic acid, which can easily adsorb dye molecules 14,16–19 . Among the above‐mentioned biopolymers, CHI has great interest to use as a bio‐adsorbent due to cationic, non‐toxic, biocompatible, and biodegradable polysaccharide and presence of a primary amine group 20 .…”

“…15 Some of these biopolymers are used for the preparation of bio-adsorbent due to presence of ionic groups like hydroxyl, carboxylic acid, aldehyde, amine, and sulfonic acid, which can easily adsorb dye molecules. 14,[16][17][18][19] Among the above-mentioned biopolymers, CHI has great interest to use as a bio-adsorbent due to cationic, non-toxic, biocompatible, and biodegradable polysaccharide and presence of a primary amine group. 20 It provides a strong electrostatic interaction with other anionic biopolymer/organic moiety and can be easily modified to form beads, flakes, and gels for removal of dyes molecules.…”