Abstract: The chemical structures of Miscanthus var. ‘Soranovskii’ lignin fractions released via extraction of lignin from the lignocellulosic feedstock using moderately heated acetone under atmospheric pressure, without acidic and alkaline catalysts, were studied. A blend of Miscanthus stems and leaves was pretreated with water under thermobaric conditions. The acetone organosolv process subsequently afforded a substance related to a lignin-like matter-acetone organosolv Miscanthus lignin (AOML). Non-destructive analytical techniques such as FTIR spectroscopy, gas chromatography-mass spectrometry, size-exclusion chromatography, and 2D NMR were used. The IR and NMR spectroscopies revealed the AOML structure to comprise all the three major types of phenylpropane units: guaiacyl (G), syringyl (S), and p-hydroxyphenyl (H). The resultant acetone-organosolv lignin exhibits good solubility in polar solvents, moderate solubility in aromatic chemicals, and is insoluble in non-polar solvents, exhibiting the physicochemical properties of a thermoplastic polymer with a softening point of 67.0°C (onset 33.0°C, endset 81.5°C).

Cite: Il’yasov S.G. , Cherkashin V.A. , Sakovich G.V. , Parkhomenko D.A.
Extraction products from var. ‘Soranovskii’
Chemical Papers. 2015. V.69. N11. P.1445-1453. DOI: 10.1515/chempap-2015-0158 WOS Scopus РИНЦ

Dates:

Submitted:	Mar 31, 2015
Accepted:	May 15, 2015

Identifiers:

Web of science	WOS:000360928200006
Scopus	2-s2.0-84941034693
Elibrary	24946642
OpenAlex	W2560435426

Altmetrics: