PMID- 35519228
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220716
IS  - 2046-2069 (Electronic)
IS  - 2046-2069 (Linking)
VI  - 10
IP  - 67
DP  - 2020 Nov 9
TI  - Possible dissolution mechanism of alkali lignin in lactic acid-choline chloride 
      under mild conditions.
PG  - 40649-40657
LID - 10.1039/d0ra07808e [doi]
AB  - In this study, several representative deep eutectic solvents (DESs) were designed 
      to evaluate the solubility for alkali lignin (AL). It was found that DESs with 
      lactic acid (LA) as hydrogen bond donors (HBDs) had good solubility for AL, in 
      which lactic acid(LA) : choline chloride(ChCl) 10 : 1 showed excellent solubility 
      with more than 17 wt% under a relatively mild condition of 60  degrees C. The results of 
      gel permeation chromatography (GPC), FTIR and (1)H and HSQC NMR spectroscopies 
      revealed an important possible dissolution mechanism of AL in LA-ChCl, that is, 
      AL could be depolymerized under the action of LA when dissolved in LA-ChCl. Then, 
      a new connection would form between the phenolic groups on the lignin fragments 
      and ChCl, which is similar to that between ChCl and LA in DES, leading to an 
      increase in the molecule weight of lignin. The new connections could be easily 
      broken under the action of heat (150  degrees C) or microwave to the redispersion of 
      lignin fragments. The results would provide a theoretic base for the high-value 
      application of lignin in bioresources.
CI  - This journal is (c) The Royal Society of Chemistry.
FAU - Liu, Zhuang
AU  - Liu Z
AUID- ORCID: 0000-0002-9847-7135
AD  - State Key Laboratory of Pulp and Paper Engineering, South China University of 
      Technology Guangzhou 510640 P. R. China ceyhou@scut.edu.cn.
FAU - Hou, Yi
AU  - Hou Y
AD  - State Key Laboratory of Pulp and Paper Engineering, South China University of 
      Technology Guangzhou 510640 P. R. China ceyhou@scut.edu.cn.
FAU - Hu, Songqing
AU  - Hu S
AD  - School of Food Science and Engineering, South China University of Technology 
      Guangzhou 510640 P. R. China.
FAU - Li, Youming
AU  - Li Y
AD  - State Key Laboratory of Pulp and Paper Engineering, South China University of 
      Technology Guangzhou 510640 P. R. China ceyhou@scut.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20201109
PL  - England
TA  - RSC Adv
JT  - RSC advances
JID - 101581657
PMC - PMC9057700
COIS- There are no conflicts of interest to declare
EDAT- 2020/11/09 00:00
MHDA- 2020/11/09 00:01
PMCR- 2020/11/09
CRDT- 2022/05/06 06:03
PHST- 2020/09/11 00:00 [received]
PHST- 2020/10/21 00:00 [accepted]
PHST- 2022/05/06 06:03 [entrez]
PHST- 2020/11/09 00:00 [pubmed]
PHST- 2020/11/09 00:01 [medline]
PHST- 2020/11/09 00:00 [pmc-release]
AID - d0ra07808e [pii]
AID - 10.1039/d0ra07808e [doi]
PST - epublish
SO  - RSC Adv. 2020 Nov 9;10(67):40649-40657. doi: 10.1039/d0ra07808e. eCollection 2020 
      Nov 9.