Imperial College London
Alternate

Paul Fennell

Faculty of Engineering, Department of Chemical Engineering

Professor of Clean Energy
 
 
 
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Contact

 

+44 (0)20 7594 6637p.fennell

 
 
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Location

 

228aBone BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Chambon:2020:10.1021/acssuschemeng.9b06939,
author = {Chambon, CL and Fitriyanti, V and Verdía, P and Yang, SM and Hérou, S and Titirici, M-M and Brandt-Talbot, A and Fennell, PS and Hallett, JP},
doi = {10.1021/acssuschemeng.9b06939},
journal = {ACS Sustainable Chemistry & Engineering},
pages = {3751--3761},
title = {Fractionation by sequential antisolvent precipitation of grass, softwood, and hardwood lignins isolated using low-cost ionic liquids and water},
url = {http://dx.doi.org/10.1021/acssuschemeng.9b06939},
volume = {8},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In this study, fractionation by sequential antisolvent precipitation was applied to ionoSolv lignins for the first time. Pretreatment with the aqueous low-cost protic ionic liquid N,N-dimethylbutylammonium hydrogen sulfate ([DMBA][HSO4], 80 wt % in water) was applied to Miscanthus (herbaceous), willow (hardwood), and pine (softwood) to extract lignin. Then, lignin was sequentially precipitated by the addition of water as an antisolvent. Fractionation appeared to be controlled by the molecular weight of lignin polymers. Fractions isolated with minimal water volumes were shown to have high molecular weight, polydispersity, thermal stability, and Tg (178 °C). Later precipitates were more monodisperse and had high phenolic and total hydroxyl content and lower thermal stability and Tg (136 °C). Addition of 1 g of water per gram of dry IL was able to precipitate up to 90 wt % of lignin. Fractional precipitation represents a novel lignin isolation technique that can be performed as part of the lignin recovery procedure enabling a high degree of control of lignin properties. The effect of the fractionation on lignin structural, chemical, and thermal properties was thoroughly examined by two-dimensional heteronuclear single quantum coherence nuclear magnetic resonance, gel permeation chromatography, thermogravimetric analysis, and differential scanning calorimetry and compared to the unfractionated lignin precipitate obtained by addition of an excess of water.
AU  - Chambon,CL
AU  - Fitriyanti,V
AU  - Verdía,P
AU  - Yang,SM
AU  - Hérou,S
AU  - Titirici,M-M
AU  - Brandt-Talbot,A
AU  - Fennell,PS
AU  - Hallett,JP
DO  - 10.1021/acssuschemeng.9b06939
EP  - 3761
PY  - 2020///
SN  - 2168-0485
SP  - 3751
TI  - Fractionation by sequential antisolvent precipitation of grass, softwood, and hardwood lignins isolated using low-cost ionic liquids and water
T2  - ACS Sustainable Chemistry & Engineering
UR  - http://dx.doi.org/10.1021/acssuschemeng.9b06939
UR  - https://pubs.acs.org/doi/10.1021/acssuschemeng.9b06939
UR  - http://hdl.handle.net/10044/1/77273
VL  - 8
ER  -
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