PMID- 29049985 OWN - NLM STAT- MEDLINE DCOM- 20180530 LR - 20181202 IS - 1873-2976 (Electronic) IS - 0960-8524 (Linking) VI - 249 DP - 2018 Feb TI - Insight into the structure-function relationships of deep eutectic solvents during rice straw pretreatment. PG - 261-267 LID - S0960-8524(17)31836-9 [pii] LID - 10.1016/j.biortech.2017.10.019 [doi] AB - Rice straw pretreatment mediated by choline chloride (ChCl) or lactic acid (Lac) sequences deep eutectic solvents (DESs) was investigated in this work. Hydrogen bond acceptors (HBAs) and hydrogen bond donors (HBDs) proved to be both important for DESs pretreatment efficiency. DESs containing lots of hydroxyl or amino groups with a high intermolecular hydrogen-bond (H-bond) strength exhibited weak biomass deconstruction abilities. The presence of strong electron-withdrawing groups in DESs was benefit for xylan removal, thus furnishing higher cellulose digestibility. The relationships between the properties of DESs, xylan removal and cellulose digestibility of pretreated biomass were established. It was found that xylan removal was negatively correlated with the pKa values of HBDs, and the enzymatic cellulose digestibility of the residues was linearly and positively related to xylan removal instead of delignification. These results provide a preliminary reference for rational design of novel DESs for biomass pretreatment. CI - Copyright (c) 2017 Elsevier Ltd. All rights reserved. FAU - Hou, Xue-Dan AU - Hou XD AD - School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: houxd@gdut.edu.cn. FAU - Li, Ao-Lin AU - Li AL AD - School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China. FAU - Lin, Kai-Peng AU - Lin KP AD - School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China. FAU - Wang, Yuan-Yuan AU - Wang YY AD - School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China. FAU - Kuang, Zhi-Yin AU - Kuang ZY AD - School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China. FAU - Cao, Shi-Lin AU - Cao SL AD - Department of Food Science, Foshan University, Foshan 528231, China. LA - eng PT - Journal Article DEP - 20171007 PL - England TA - Bioresour Technol JT - Bioresource technology JID - 9889523 RN - 0 (Solvents) RN - 9004-34-6 (Cellulose) SB - IM MH - Biomass MH - Cellulose MH - *Oryza MH - Solvents MH - Structure-Activity Relationship OTO - NOTNLM OT - Cellulose digestibility OT - Deep eutectic solvents OT - Rice straw pretreatment OT - Structure-function relationships OT - Xylan removal EDAT- 2017/10/20 06:00 MHDA- 2018/05/31 06:00 CRDT- 2017/10/20 06:00 PHST- 2017/08/16 00:00 [received] PHST- 2017/10/04 00:00 [revised] PHST- 2017/10/05 00:00 [accepted] PHST- 2017/10/20 06:00 [pubmed] PHST- 2018/05/31 06:00 [medline] PHST- 2017/10/20 06:00 [entrez] AID - S0960-8524(17)31836-9 [pii] AID - 10.1016/j.biortech.2017.10.019 [doi] PST - ppublish SO - Bioresour Technol. 2018 Feb;249:261-267. doi: 10.1016/j.biortech.2017.10.019. Epub 2017 Oct 7.