Green and Facile Synthesis of Bio-Based, Flame-Retardant, Latent Imidazole Curing Agent for Single-Component Epoxy Resin
Article
Article Title | Green and Facile Synthesis of Bio-Based, Flame-Retardant, Latent Imidazole Curing Agent for Single-Component Epoxy Resin |
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ERA Journal ID | 211585 |
Article Category | Article |
Authors | Wang, Jingsheng, Huo, Siqi, Wang, Jun, Yang, Shuang, Chen, Kaiwen, Li, Chang, Fang, De, Fang, Zhengping, Song, Pingan and Wang, Hao |
Journal Title | ACS Applied Polymer Materials |
Journal Citation | 4 (5), pp. 3564-3574 |
Number of Pages | 11 |
Year | 13 May 2022 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 2637-6105 |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsapm.2c00138 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acsapm.2c00138 |
Abstract | Developing bio-based flame retardants according to a green and simple strategy has drawn extensive attention recently. Hence, a biomass-derived, flame-retardant, latent curing agent (IMPA) was synthesized via the neutralization between imidazole and phytic acid in water at room temperature and was applied for single-component epoxy resin (EP). The results indicate that the shelf life of the resultant EP (EP/IMPA) increases from <1 day of the control single-component EP to 10 days at room temperature. Meanwhile, EP/IMPA features a fast curing rate at modest temperature (80–150 °C), and its gel time at 100 °C is only 14 min. Notably, EP/IMPA achieves superior flame retardancy with a limiting oxygen index of 34.7% and UL-94 V-0 rating. The peak heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) of EP/IMPA are reduced by 43.0%, 31.9%, and 31.5% compared with the control sample. The enhanced fire safety is ascribed to the flame-retardant function of IMPA in both gaseous and condensed phases. Hence, this work provides a green and feasible method to create bio-based, flame-retardant, latent curing agents for one-component epoxy systems. |
Keywords | epoxy resin; bio-based latent curing agent; curing behaviors; storage stability; flame retardancy; smoke suppression |
ANZSRC Field of Research 2020 | 401609. Polymers and plastics |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Wuhan University of Technology, China |
School of Engineering | |
Imperial College London, United Kingdom | |
NingboTech University, China | |
Zhejiang University, China | |
Centre for Future Materials | |
School of Agriculture and Environmental Science |
https://research.usq.edu.au/item/yy86w/green-and-facile-synthesis-of-bio-based-flame-retardant-latent-imidazole-curing-agent-for-single-component-epoxy-resin
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