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Nanoscale Observation of Microfibril Swelling and Dissolution in Ionic Liquids
Xu, Junli1; Zhang, Baocai2; Lu, Xingmei1,3; Zhou, Yihua2; Fang, Jinyun4; Li, Yao1; Zhang, Suojiang1,3

Ionic liquids (ILs) are widely used for biomass pretreatment because of their excellent dissolving capacity. The efficient and economical use of ILs in pretreatment greatly depends on revealing the underlying mechanism of biomass dissolution. Here, we observed that cellulose microfibrils of rice straw swelled in ILs using atomic force microscopy, and the swelling resulted in a decrease in cellulose crystallinity as determined by time-course X-ray diffraction analysis. The swelling of the IL-induced cellulose microfibrils greatly promoted the saccharification efficiency of rice straw. Compared with conventional acid or alkali solutions, strong hydrogen bond interactions between ILs of the appropriate size and polysaccharides resulted in cellulose microfibrils swelling in ILs, which was demonstrated by nuclear magnetic resonance and molecular simulation. Therefore, microfibril swelling is the key step in cellulose dissolution with ILs; effective swelling could accelerate cellulose dissolution and biomass pretreatment. Thus, those results are helpful in understanding the mechanism of lignocellulose dissolution in ILs and developing new ILs for biomass pretreatment.

KeywordIonic Liquids Biomass Swelling Cellulose Microfibrils
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Indexed BySCI
WOS KeywordBiomass Recalcitrance ; Enzymatic Digestibility ; Lignocellulosic Biomass ; Molecular Simulation ; Cellulose Fiber ; Hydrogen-bonds ; Corn Stover ; Force-field ; Pretreatment ; Hydrolysis
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Engineering
WOS SubjectChemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(21606240 ; 21210006 ; 21336002 ; 21476234)
WOS IDWOS:000419536800096
Citation statistics
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc,Key Lab Gr, 1 North 2nd St, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Plant Genom, 1 West Beichen Rd, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Sch Chem & Chem Engn, 19A Yuquan Rd, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Tech Inst Phys & Chem, 29 Zhongguancun East Rd, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Xu, Junli,Zhang, Baocai,Lu, Xingmei,et al. Nanoscale Observation of Microfibril Swelling and Dissolution in Ionic Liquids[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2018,6(1):909-917.
APA Xu, Junli.,Zhang, Baocai.,Lu, Xingmei.,Zhou, Yihua.,Fang, Jinyun.,...&Zhang, Suojiang.(2018).Nanoscale Observation of Microfibril Swelling and Dissolution in Ionic Liquids.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,6(1),909-917.
MLA Xu, Junli,et al."Nanoscale Observation of Microfibril Swelling and Dissolution in Ionic Liquids".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 6.1(2018):909-917.
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