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The synthesis of biphenyl ether/vanillin-based flame retardants for enhancing both the flame retardant properties and mechanical performance of epoxy resin |
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| Authors: | Xin Huang Haopeng Cai Lihua Gao Yangwen Mao Wanyu Huang |
| Affiliation: | 1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, People's Republic of China
Contribution: ?Investigation (lead), Methodology (lead), Software (lead), Writing - original draft (lead), Writing - review & editing (lead);2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, People's Republic of China;3. Jiangshan Heavy Industries Research Institute Co., Ltd., China North Industries Group Corporation Limited, Xiangyang, People's Republic of China Contribution: Data curation (equal), Funding acquisition (lead), Project administration (equal), Writing - original draft (equal);4. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, People's Republic of China Contribution: Methodology (supporting), Writing - original draft (equal), Writing - review & editing (equal);5. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, People's Republic of China Contribution: ?Investigation (supporting), Writing - original draft (equal), Writing - review & editing (equal) |
| Abstract: | Imparting good flame retardancy and mechanical properties to epoxy resin (EP), while pursuing the sustainable and safe application of EP, we synthesized a novel reactive phosphorus/nitrogen flame retardant for biomass through nucleophilic addition reaction, which contains flexible ether bonds and rigid aromatic ring structure (DVD). Owing to the cooperative effect of aryl ether diamine, phosphorus phenanthrene, and biomass vanillin, the DVD exhibited excellent flame retardancy. EP/DVD-1 (0.4 wt% phosphorus content) achieved UL-94 V-0 rating, with an improvement in limiting oxygen index value from 26.5% (pure EP) to 32.5%. In the CCT, the modified DVD EP showed a 44.5% reduction in peak peak of heat release rate (PHRR) and a 38.0% reduction in total heat release compared to pure EPs. And flame retardant epoxy resin (FREP) still had good transparency after the addition of DVD, which indicated the nice compatibility between DVD andEP. What was noteworthiness was that at high levels of addition, the mechanical properties of modified EP for DVD was still improved compared to pure EP. These results demonstrate that DVD is an excellent and multifunctional bio-based flame retardant with broad application prospects in the field of EP material modification. |
| Keywords: | bio-based DOPO epoxy resin flame retardant mechanical properties |