ESTONIAN ACADEMY
PUBLISHERS
eesti teaduste
akadeemia kirjastus
PUBLISHED
SINCE 1952
 
Proceeding cover
proceedings
of the estonian academy of sciences
ISSN 1736-7530 (Electronic)
ISSN 1736-6046 (Print)
Impact Factor (2020): 1.045

Ionic liquids as solvents for making composite materials from cellulose; pp. 255–266

Full article in PDF format | doi: 10.3176/proc.2016.3.09

Authors
Fred Elhi, Tiina Aid, Mihkel Koel

Abstract

Some imidazolium-based ionic liquids (ILs) are able to dissolve microcrystalline cellulose to form 10 wt% solutions. This allows easy production of cellulose composite materials by mixing the respective solutions. The purpose of this work was to make an environmentally friendly novel material using cellulose as a binder to be an alternative for classical binders in electrically conductive materials. Eleven ILs were used to dissolve cellulose. The ILs included two ILs previously untested for this application. Monofilaments composed of three types of cellulose and carbon aerogels were prepared. Solutions of cellulose and carbon aerogels were made into electrically conducting materials. Regeneration of cellulose and composites from ILs was performed using water, ethanol, and acetone. From those antisolvents water proved to be the most effective. The solutions were made into films and fibre extrusions. The used ILs were successfully recovered and reused after regeneration of cellulose. This further strengthened the belief that dissolving cellulose with ionic liquids is a ‘green process’.


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