Melt Stable Functionalized Organosolv and Kraft Lignin Thermoplastic

Validerad;2020;Nivå 2;2020-11-05 (johcin)
A shift towards an economically viable biomass biorefinery concept requires the use of all biomass fractions (cellulose, hemicellulose, and lignin) for the production of high added-value products. As lignin is often underutilized, the establishment of lignin valorization routes is highly important. In-house produced organosolv as well as commercial Kraft lignin were used in this study. The aim of the current work was to make a comparative study of thermoplastic biomaterials from two different types of lignins. Native lignins were alkylate with two different alkyl iodides to produce ether-functionalized lignins. Successful etherification was verified by FT-IR spectroscopy, changes in the molecular weight of lignin, as well as 13C and 1H Nuclear Magnetic Resonance (NMR). The thermal stability of etherified lignin samples was considerably improved with the T2% of organosolv to increase from 143 °C to up to 213 °C and of Kraft lignin from 133 °C to up to 168 °C, and glass transition temperature was observed. The present study shows that etherification of both organosolv and Kraft lignin with alkyl halides can produce lignin thermoplastic biomaterials with low glass transition temperature. The length of the alkyl chain affects thermal stability as well as other thermal properties.

NATURVETENSKAP Kemi Fysikalisk kemi hsv//swe
NATURAL SCIENCES Chemical Sciences Physical Chemistry hsv//eng
TEKNIK OCH TEKNOLOGIER Industriell bioteknik Bioprocessteknik hsv//swe
ENGINEERING AND TECHNOLOGY Industrial Biotechnology Bioprocess Technology hsv//eng
lignin
organosolv
Kraft lignin
etherification
lignin functionalization
thermoplastics
Chemistry of Interfaces
Gränsytors kemi
Biokemisk processteknik
Biochemical Process Engineering

Matsakas, LeonidasLuleå tekniska universitet,Kemiteknik(Swepub:ltu)leomat (author)
Rova, UlrikaLuleå tekniska universitet,Kemiteknik(Swepub:ltu)ulrok (author)
Christakopoulos, PaulLuleå tekniska universitet,Kemiteknik(Swepub:ltu)pauchr (author)
Luleå tekniska universitetKemiteknik (creator_code:org_t)

By the author/editor: Bhattacharyya, S ...; Matsakas, Leonid ...; Rova, Ulrika; Christakopoulos, ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Physical Chemist ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Industrial Biote ...; and Bioprocess Techn ...

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