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Study on the regularity of cellulose degradation in ionic liquids
CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China. Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou 450000, China.
CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China. Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou 450000, China.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0003-1394-7925
CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
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2020 (English)In: Journal of Molecular Liquids, ISSN 0167-7322, E-ISSN 1873-3166, Vol. 308, article id 113153Article in journal (Refereed) Published
Abstract [en]

Ionic liquids (ILs) show the superiority in dissolving and spinning of cellulose. In this work, wood pulp and microcrystalline cellulose were dissolved respectively in two ILs, 1-allyl-3-methylimidazolium chloride ([Amim]Cl) and 1-ethyl-3-methylimidazolium diethyl phosphate ([Emim]DEP), to investigate the regularity of cellulose degradation in ILs. A novel method for determining degree of polymerization of cellulose employed ILs was proposed and its accuracy was compared with the traditional method. The results indicated that cellulose depolymerized seriously with the increase of time and temperature in [Amim]Cl than in [Emim]DEP. In addition, after cellulose dissolving for 72 h, none of the reducing sugar remained in the recycled [Emim]DEP, however, more than 2% reducing sugar can be measured in the recycled [Amim]Cl. These results are consistent with FT-IR investigation, i.e., [Amim]Cl shows greater dissolution capability for cellulose than [Emim]DEP. Therefore, [Emim]DEP shows great prospects in the continuous industrial spinning process under the determined temperature of 90–100 °C.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 308, article id 113153
Keywords [en]
Degradation, Ionic liquids, Regenerated cellulose fibers, Degree of polymerization, Reducing sugar
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-78583DOI: 10.1016/j.molliq.2020.113153ISI: 000538630500048Scopus ID: 2-s2.0-85083366338OAI: oai:DiVA.org:ltu-78583DiVA, id: diva2:1424883
Note

Validerad;2020;Nivå 2;2020-07-01 (johcin)

Available from: 2020-04-20 Created: 2020-04-20 Last updated: 2020-07-01Bibliographically approved

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Liu, Yanrong

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