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dc.contributor.authorGosz, Kamila
dc.contributor.authorTercjak Sliwinska, Agnieszka
dc.contributor.authorOlszewski, Adam
dc.contributor.authorHaponiuk, Józef
dc.contributor.authorPiszczyk, Łukasz
dc.date.accessioned2021-06-22T08:24:29Z
dc.date.available2021-06-22T08:24:29Z
dc.date.issued2021-06-07
dc.identifier.citationMaterials 14(11) : (2021) // Article ID 3138es_ES
dc.identifier.issn1996-1944
dc.identifier.urihttp://hdl.handle.net/10810/51972
dc.description.abstractThe utilization of forestry waste resources in the production of polyurethane resins is a promising green alternative to the use of unsustainable resources. Liquefaction of wood-based biomass gives polyols with properties depending on the reagents used. In this article, the liquefaction of forestry wastes, including sawdust, in solvents such as glycerol and polyethylene glycol was investigated. The liquefaction process was carried out at temperatures of 120, 150, and 170 °C. The resulting bio-polyols were analyzed for process efficiency, hydroxyl number, water content, viscosity, and structural features using the Fourier transform infrared spectroscopy (FTIR). The optimum liquefaction temperature was 150 °C and the time of 6 h. Comprehensive analysis of polyol properties shows high biomass conversion and hydroxyl number in the range of 238–815 mg KOH/g. This may indicate that bio-polyols may be used as a potential substitute for petrochemical polyols. During polyurethane synthesis, materials with more than 80 wt% of bio-polyol were obtained. The materials were obtained by a one-step method by hot-pressing for 15 min at 100 °C and a pressure of 5 MPa with an NCO:OH ratio of 1:1 and 1.2:1. Dynamical-mechanical analysis (DMA) showed a high modulus of elasticity in the range of 62–839 MPa which depends on the reaction conditions.es_ES
dc.description.sponsorshipThe authors would like to thank the National Science Centre of Poland (No. 2018/02/X/ST5/02784) for financial support.es_ES
dc.language.isoenges_ES
dc.publisherMDPIes_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/
dc.subjectliquefactiones_ES
dc.subjectliquefied woodes_ES
dc.subjectbio-polyolses_ES
dc.subjectpolyurethane resines_ES
dc.titleBio-Based Polyurethane Networks Derived from Liquefied Sawdustes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.date.updated2021-06-10T13:48:01Z
dc.rights.holder2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).es_ES
dc.relation.publisherversionhttps://www.mdpi.com/1996-1944/14/11/3138/htmes_ES
dc.identifier.doi10.3390/ma14113138
dc.departamentoesIngeniería química y del medio ambiente
dc.departamentoeuIngeniaritza kimikoa eta ingurumenaren ingeniaritza


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2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Except where otherwise noted, this item's license is described as 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).