RT Journal Article
T1 Improved Reactivity of Cellulose via Its Crystallinity Reduction by Nondissolving Pretreatment with an Ionic Liquid
A1 Pena, Carlos A.
A1 Soto Campos, Ana María
A1 King, Alistair W. T.
A1 Rodríguez Martínez, Héctor
K1 Cellulose
K1 Tetrabutylphosphonium
K1 Crystallinity Index
K1 Enzymatic Hydrolysis
K1 Degree of Polymerization
AB The improvement of the reactivity of cellulose by means of an efficient pretreatment method is critical for the optimal valorization of this biorenewable polymer within a biorefinery context. In this work, a nondissolving procedure for the pretreatment of cellulose, based on the direct solid–liquid contact of cellulose with an ionic liquid, namely tetrabutylphosphonium acetate, or with its mixtures with water or dimethyl sulfoxide, was found to lead to an effective reduction of the cellulose crystallinity. Due to the nondissolving nature of the method, the cellulose thus pretreated can be simply recovered by filtration from the pretreatment fluid. The use of the molecular cosolvents, as compared to the use of the neat ionic liquid, results in a less viscous pretreatment fluid and also in a larger reduction of the cellulose crystallinity. An improvement in the reactivity of the pretreated cellulose was evidenced via the determination of the kinetics of an enzymatic hydrolysis. A relationship between this reaction kinetics and the degree of crystallinity of the cellulose was inferred: the lower the crystallinity, the faster the hydrolysis. The thermal stability and degree of polymerization of the pretreated cellulose samples were comparable or essentially unaltered with respect to the untreated cellulose.
PB ACS Publications
YR 2019
FD 2019-04
LK https://hdl.handle.net/10347/44201
UL https://hdl.handle.net/10347/44201
LA eng
NO Pena, C., Soto, A., King, A., & Rodríguez, H. (2019). Improved reactivity of cellulose via its crystallinity reduction by non-dissolving pretreatment with an ionic liquid. ACS Sustainable Chemistry & Engineering, 7, 9164–9171. https://doi.org/10.1021/acssuschemeng.8b06357
NO This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Sustainable Chemistry & Engineering, copyright © 2019 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acssuschemeng.8b06357
NO The authors will be forever indebted to the figure of Kenneth R. Seddon, whose friendship and support was decisive in the development of ionic liquid research efforts at the University of Santiago de Compostela. The authors are grateful to Xunta de Galicia for support through project ED431B 2017/023 and the Galician Network of Ionic Liquids (ED431D 2017/06) and the CRETUS Strategic Partnership (ED431E 2018/01), cofunded by the European Regional Development Fund. The authors thank Dr. Thelmo A. Lu-Chau for advice and discussion on experimental issues. The use of RIAIDT-USC analytical facilities is also acknowledged.
DS Minerva
RD 4 may 2026