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Achieving higher performances without an external curing agent in natural magnolol-based epoxy resin
- Source :
- Chinese Chemical Letters. 33:2195-2199
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- Bio-based epoxy thermoset prepared from renewable biomass raw materials can alleviate fossil energy crisis and reduce environmental pollution, which satisfies the needs of sustainable social development. In this study, a bio-based epoxy thermoset precursor (MGOL-EP) was synthesized from a naturally occurring magnolol through a facile and efficient one-step process. And the fully bio-based epoxy thermoset (MGOL-EP-SC) was obtained by self-curing without adding any other hardener. MGOL-EP-SC revealed an extremely high glass-transition temperature (Tg) of 265 °C and char yield of 53.2% (in N2), which were at the highest level among the fully bio-based epoxy thermosets reported so far. In addition, when the MGOL-EP was cured with 4,4′-methylenedianiline (DDM), Tg of the MGOL-EP/DDM was decreased by 61 °C and the other comprehensive performance had also been decreased, which was due to a reduction in biphenyl structure content and cross-linking density by adding the external curing agents. Moreover, the MGOL-EP-SC presented certain killing rate (48.4%) to Staphylococcus aureus. These findings provide a new design strategy for engineering high-performance and functional epoxy thermoset with high biomass content.
Details
- ISSN :
- 10018417
- Volume :
- 33
- Database :
- OpenAIRE
- Journal :
- Chinese Chemical Letters
- Accession number :
- edsair.doi...........fe13dd71c9d3731ef58b024dfe80ffbd