Abstract:
:Deep eutectic solvents (DESs) are a potentially high-value lignin extraction methodology. DESs prepared from choline chloride (ChCl) and three hydrogen-bond donors (HBD)-lactic acid (Lac), glycerol, and urea-were evaluated for isolation of willow (Salix matsudana cv. Zhuliu) lignin. DESs types, mole ratio of ChCl to HBD, extraction temperature, and time on the fractionated DES-lignin yield demonstrated that the optimal DES-lignin yield (91.8 wt % based on the initial lignin in willow) with high purity of 94.5% can be reached at a ChCl-to-Lac molar ratio of 1:10, extraction temperature of 120 °C, and time of 12 h. Fourier transform infrared spectroscopy (FT-IR) , 13C-NMR, and 31P-NMR showed that willow lignin extracted by ChCl-Lac was mainly composed of syringyl and guaiacyl units. Serendipitously, a majority of the glucan in willow was preserved after ChCl-Lac treatment.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Li T,Lyu G,Liu Y,Lou R,Lucia LA,Yang G,Chen J,Saeed HAMdoi
10.3390/ijms18112266subject
Has Abstractpub_date
2017-10-28 00:00:00issue
11issn
1422-0067pii
ijms18112266journal_volume
18pub_type
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