Super-assembled highly compressible and flexible cellulose aerogels for methylene blue removal from water

The TOCN/PVA/M-K10 aerogel fabricated through super-assembly shows excellent mechanical property and methylene blue adsorption performance. [Display omitted] Physical adsorption is a common method to solve the contamination of methylene blue in dyeing wastewater. As a kind of adsorption material, ce...

Full description

Saved in:
Bibliographic Details
Published in:Chinese chemical letters 2021-06, Vol.32 (6), p.2091-2096
Main Authors: Luo, Mingfu, Wang, Meng, Pang, Huaipeng, Zhang, Runhao, Huang, Jing, Liang, Kang, Chen, Pu, Sun, Peipei, Kong, Biao
Format: Article
Language:English
Subjects:
Adsorption
Aerogel
Cellulose nanofiber
Compressible
Methylene blue
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The TOCN/PVA/M-K10 aerogel fabricated through super-assembly shows excellent mechanical property and methylene blue adsorption performance. [Display omitted] Physical adsorption is a common method to solve the contamination of methylene blue in dyeing wastewater. As a kind of adsorption material, cellulose aerogels with high porosity and surface areas have great potential application in methylene blue removal. However, the week hydrogen bonding between cellulose nanofibers making the cellulose aerogels with the poor mechanical properties and can be easily destroyed during adsorption. Hence, the preparation of cellulose aerogels with high mechanical strength is still a great challenge. Here, we report a robust super-assembly strategy to fabricate cellulose aerogels by combining cellulose nanofibers with PVA and M-K10. The resulting cellulose aerogels not only has a robust chemically cross-linked network, but also has strong H-bonds, which greatly enhance the mechanical properties. The resulting cellulose aerogels possess a low density of 19.32 mg/cm3. Furthermore, the cellulose aerogel shows 93% shape recovery under 60% strain (9.5 kPa under 60% strain) after 100 cycles, showing excellent mechanical property. The adsorption capacity of cellulose aerogel to methylene blue solution of 20 mg/L is 2.28 mg/g and the adsorption kinetics and adsorption isotherms have also been studied. Pseudo-second-order kinetic model and Freundlich isotherm model are more acceptable for indicating the adsorption process of methylene blue on the cellulose aerogel. Thus, this compressible and durable cellulose aerogel is a very prospective material for dyeing wastewater cleanup.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2021.03.024