We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Characterization of Lignin Extracted from Willow by Deep Eutectic Solvent Treatments.
- Authors
Lyu, Gaojin; Li, Tengfei; Ji, Xingxiang; Yang, Guihua; Liu, Yu; Lucia, Lucian A.; Chen, Jiachuan
- Abstract
Purity, morphology, and structural characterization of synthesized deep eutectic solvent (DES)-lignins (D6h, D9h, D12h, D18h, D24h) extracted from willow (Salix matsudana cv. Zhuliu) after treatment with a 1:10 molar ratio of choline chloride and lactic acid at 120 °C for 6, 9, 12, 18, and 24 h were carried out. The purity of DES-lignin was ~95.4%. The proportion of hydrogen (H) in DES-lignin samples increased from 4.22% to 6.90% with lignin extraction time. The DES-lignin samples had low number/weight average molecular weights (1348.1/1806.7 to 920.2/1042.5 g/mol, from D6h to D24h) and low particle sizes (702–400 nm). Atomic force microscopy (AFM) analysis demonstrated that DES-lignin nanoparticles had smooth surfaces and diameters of 200–420 nm. Syringyl (S) units were dominant, and total phenolic hydroxyl content and total hydroxyl content reached their highest values of 2.05 and 3.42 mmol·g−1 in D12h and D6h, respectively. β-Aryl ether (β-O-4) linkages were eliminated during DES treatment.
- Subjects
LIGNINS; EUTECTICS; SOLVENTS; MOLECULAR structure; SALICACEAE; CHOLINE chloride
- Publication
Polymers (20734360), 2018, Vol 10, Issue 8, p869
- ISSN
2073-4360
- Publication type
Academic Journal
- DOI
10.3390/polym10080869