Kinetic analysis of microwave-enhanced cellulose dissolution in ionic solvents

Pablo B. Sánchez; Shuntaro Tsubaki; Agílio A.H. Pádua; Yuji Wada

doi:10.1039/c9cp06239d

Kinetic analysis of microwave-enhanced cellulose dissolution in ionic solvents

Pablo B. Sánchez, Shuntaro Tsubaki, Agílio A.H. Pádua, Yuji Wada

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Cellulose dissolution in mixtures of the ionic liquid 1-ethyl-3-methylimidazolium acetate with dimethylsulfoxide, [C₂C₁Im][OAc] + DMSO, have been kinetically compared using conventional heating and microwave heating in a single-mode cavity with a semiconductor generator. Microwaves led to enhancements in the dissolution rate between 21 and 57% under different conditions of temperature and concentration of ionic liquid. Rate enhancement by microwaves prominently occurred at temperatures above 60 °C. Based on an Arrhenius plot and wide-band dielectric measurements we advance the hypothesis that the faster dissolution is caused by ionic motion induced by microwaves in the timescale of formation and breaking of hydrogen bonds between cellulose chains and acetate anions.

Original language	English
Pages (from-to)	1003-1010
Number of pages	8
Journal	Physical Chemistry Chemical Physics
Volume	22
Issue number	3
DOIs	https://doi.org/10.1039/c9cp06239d
Publication status	Published - 2020
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1039/c9cp06239d

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title = "Kinetic analysis of microwave-enhanced cellulose dissolution in ionic solvents",

abstract = "Cellulose dissolution in mixtures of the ionic liquid 1-ethyl-3-methylimidazolium acetate with dimethylsulfoxide, [C2C1Im][OAc] + DMSO, have been kinetically compared using conventional heating and microwave heating in a single-mode cavity with a semiconductor generator. Microwaves led to enhancements in the dissolution rate between 21 and 57% under different conditions of temperature and concentration of ionic liquid. Rate enhancement by microwaves prominently occurred at temperatures above 60 °C. Based on an Arrhenius plot and wide-band dielectric measurements we advance the hypothesis that the faster dissolution is caused by ionic motion induced by microwaves in the timescale of formation and breaking of hydrogen bonds between cellulose chains and acetate anions.",

author = "S{\'a}nchez, {Pablo B.} and Shuntaro Tsubaki and P{\'a}dua, {Ag{\'i}lio A.H.} and Yuji Wada",

note = "Funding Information: This work was supported in part by JSPS International Research Fellow (School of Materials and Chemical Technology, Tokyo Institute of Technology), JSPS Grant-in-Aid for Scientific Research (S) 17H06156; JSPS Grant-in-Aid for Young Scientists (A) 17H05049 and Xunta de Galicia (ED481B-2018/060). Publisher Copyright: {\textcopyright} 2020 the Owner Societies.",

year = "2020",

doi = "10.1039/c9cp06239d",

language = "English",

volume = "22",

pages = "1003--1010",

journal = "Physical Chemistry Chemical Physics",

issn = "1463-9076",

publisher = "Royal Society of Chemistry",

number = "3",

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TY - JOUR

T1 - Kinetic analysis of microwave-enhanced cellulose dissolution in ionic solvents

AU - Sánchez, Pablo B.

AU - Tsubaki, Shuntaro

AU - Pádua, Agílio A.H.

AU - Wada, Yuji

N1 - Funding Information: This work was supported in part by JSPS International Research Fellow (School of Materials and Chemical Technology, Tokyo Institute of Technology), JSPS Grant-in-Aid for Scientific Research (S) 17H06156; JSPS Grant-in-Aid for Young Scientists (A) 17H05049 and Xunta de Galicia (ED481B-2018/060). Publisher Copyright: © 2020 the Owner Societies.

PY - 2020

Y1 - 2020

N2 - Cellulose dissolution in mixtures of the ionic liquid 1-ethyl-3-methylimidazolium acetate with dimethylsulfoxide, [C2C1Im][OAc] + DMSO, have been kinetically compared using conventional heating and microwave heating in a single-mode cavity with a semiconductor generator. Microwaves led to enhancements in the dissolution rate between 21 and 57% under different conditions of temperature and concentration of ionic liquid. Rate enhancement by microwaves prominently occurred at temperatures above 60 °C. Based on an Arrhenius plot and wide-band dielectric measurements we advance the hypothesis that the faster dissolution is caused by ionic motion induced by microwaves in the timescale of formation and breaking of hydrogen bonds between cellulose chains and acetate anions.

AB - Cellulose dissolution in mixtures of the ionic liquid 1-ethyl-3-methylimidazolium acetate with dimethylsulfoxide, [C2C1Im][OAc] + DMSO, have been kinetically compared using conventional heating and microwave heating in a single-mode cavity with a semiconductor generator. Microwaves led to enhancements in the dissolution rate between 21 and 57% under different conditions of temperature and concentration of ionic liquid. Rate enhancement by microwaves prominently occurred at temperatures above 60 °C. Based on an Arrhenius plot and wide-band dielectric measurements we advance the hypothesis that the faster dissolution is caused by ionic motion induced by microwaves in the timescale of formation and breaking of hydrogen bonds between cellulose chains and acetate anions.

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DO - 10.1039/c9cp06239d

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EP - 1010

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 3

ER -

Kinetic analysis of microwave-enhanced cellulose dissolution in ionic solvents

Abstract

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