Biopolyols obtained via microwave-assisted liquefaction of lignin: structure, rheological, physical and thermal properties - Publikacja - MOST Wiedzy

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Biopolyols obtained via microwave-assisted liquefaction of lignin: structure, rheological, physical and thermal properties

Abstrakt

The present study examined the application of polyols obtained via microwave-assisted liquefaction of lignin in the production of rigid polyurethane foam. Lignin was liquefed in crude glycerol and 1,4-butanediol at diferent temperatures (130–170 °C), without a catalyst and using various biomass concentrations (15 and 30 wt%). The physicochemical properties, process yield, and FTIR-based identifcation of the obtained polyols were investigated. Under optimal conditions, i.e., a 5-min microwave heating time and a reaction temperature of 150 °C, a polyol characterized by a suitable hydroxyl number of 670 mg KOH/g was obtained with a 93% process yield. Liquefed biopolyol was directly used for the production of rigid polyurethane foams with the addition of polymeric diphenylmethane diisocyanate at the [NCO/OH] ratio of 2:1. Mechanical properties of the obtained foams gradually improved with increasing content of biopolyol. The 5% weight loss temperature (T5) for bio-based foams was higher, respectively 6 and 13 °C compared to the petrochemical foam. Replacement of petrochemical polyether with biopolyols showed the ability to obtain rigid polyurethane foams from lignin and crude glycerol.

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Accepted albo Published Version
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1007/s00226-018-0991-4
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Creative Commons: CC-BY otwiera się w nowej karcie

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
WOOD SCIENCE AND TECHNOLOGY nr 52, strony 599 - 617,
ISSN: 0043-7719
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Gosz K., Kosmela P., Hejna A., Gajowiec G., Piszczyk Ł.: Biopolyols obtained via microwave-assisted liquefaction of lignin: structure, rheological, physical and thermal properties// WOOD SCIENCE AND TECHNOLOGY. -Vol. 52, iss. 3 (2018), s.599-617
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1007/s00226-018-0991-4
Weryfikacja:
Politechnika Gdańska

wyświetlono 177 razy

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