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Facile Synthesis of Formaldehyde-Free Bio-Based Thermoset Resins for Fabrication of Highly Efficient Foams

Bio-based biodegradable foams were formulated from a crosslinkable network structure combining starch, furfuryl alcohol, glyoxal, and condensed tannin in the presence of p-toluenesulfonic acid (pTSA) and azodicarbonamide (AC) as a foaming agent. More importantly, the reinforcement of gelatinized sta...

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Autores principales: Li, Xuehui, Liu, Bowen, Zheng, Lulu, Essawy, Hisham, Liu, Zhiyan, Liu, Can, Zhou, Xiaojian, Zhang, Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9737291/
https://www.ncbi.nlm.nih.gov/pubmed/36501538
http://dx.doi.org/10.3390/polym14235140
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author Li, Xuehui
Liu, Bowen
Zheng, Lulu
Essawy, Hisham
Liu, Zhiyan
Liu, Can
Zhou, Xiaojian
Zhang, Jun
author_facet Li, Xuehui
Liu, Bowen
Zheng, Lulu
Essawy, Hisham
Liu, Zhiyan
Liu, Can
Zhou, Xiaojian
Zhang, Jun
author_sort Li, Xuehui
collection PubMed
description Bio-based biodegradable foams were formulated from a crosslinkable network structure combining starch, furfuryl alcohol, glyoxal, and condensed tannin in the presence of p-toluenesulfonic acid (pTSA) and azodicarbonamide (AC) as a foaming agent. More importantly, the reinforcement of gelatinized starch–furanic foam using tannin, originating from forestry, resulted in an excellent compressive strength and lower pulverization ratio. Moreover, the addition of tannin guaranteed a low thermal conductivity and moderate flame retardancy. Fourier transform infrared (FTIR) spectroscopy approved the successful polycondensation of these condensing agents under the employed acidic conditions. Moreover, the catalytic effect of pTSA on the foaming agent induced liberation of gases, which are necessary for foam formation during crosslinking. Scanning electron microscopy (SEM) showed foam formation comprising closed cells with uniform cell distribution and appropriate apparent density. Meanwhile, the novel foam exhibited biodegradation under the action of Penicillium sp., as identified by the damage of cell walls of this foam over a period of 30 days.
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spelling pubmed-97372912022-12-11 Facile Synthesis of Formaldehyde-Free Bio-Based Thermoset Resins for Fabrication of Highly Efficient Foams Li, Xuehui Liu, Bowen Zheng, Lulu Essawy, Hisham Liu, Zhiyan Liu, Can Zhou, Xiaojian Zhang, Jun Polymers (Basel) Article Bio-based biodegradable foams were formulated from a crosslinkable network structure combining starch, furfuryl alcohol, glyoxal, and condensed tannin in the presence of p-toluenesulfonic acid (pTSA) and azodicarbonamide (AC) as a foaming agent. More importantly, the reinforcement of gelatinized starch–furanic foam using tannin, originating from forestry, resulted in an excellent compressive strength and lower pulverization ratio. Moreover, the addition of tannin guaranteed a low thermal conductivity and moderate flame retardancy. Fourier transform infrared (FTIR) spectroscopy approved the successful polycondensation of these condensing agents under the employed acidic conditions. Moreover, the catalytic effect of pTSA on the foaming agent induced liberation of gases, which are necessary for foam formation during crosslinking. Scanning electron microscopy (SEM) showed foam formation comprising closed cells with uniform cell distribution and appropriate apparent density. Meanwhile, the novel foam exhibited biodegradation under the action of Penicillium sp., as identified by the damage of cell walls of this foam over a period of 30 days. MDPI 2022-11-25 /pmc/articles/PMC9737291/ /pubmed/36501538 http://dx.doi.org/10.3390/polym14235140 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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/).
spellingShingle Article
Li, Xuehui
Liu, Bowen
Zheng, Lulu
Essawy, Hisham
Liu, Zhiyan
Liu, Can
Zhou, Xiaojian
Zhang, Jun
Facile Synthesis of Formaldehyde-Free Bio-Based Thermoset Resins for Fabrication of Highly Efficient Foams
title Facile Synthesis of Formaldehyde-Free Bio-Based Thermoset Resins for Fabrication of Highly Efficient Foams
title_full Facile Synthesis of Formaldehyde-Free Bio-Based Thermoset Resins for Fabrication of Highly Efficient Foams
title_fullStr Facile Synthesis of Formaldehyde-Free Bio-Based Thermoset Resins for Fabrication of Highly Efficient Foams
title_full_unstemmed Facile Synthesis of Formaldehyde-Free Bio-Based Thermoset Resins for Fabrication of Highly Efficient Foams
title_short Facile Synthesis of Formaldehyde-Free Bio-Based Thermoset Resins for Fabrication of Highly Efficient Foams
title_sort facile synthesis of formaldehyde-free bio-based thermoset resins for fabrication of highly efficient foams
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9737291/
https://www.ncbi.nlm.nih.gov/pubmed/36501538
http://dx.doi.org/10.3390/polym14235140
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