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- W4309261903 abstract "Abstract To improve flame retardancy of wood, a novel high-water-retention and self-healing polyvinyl alcohol/phytic acid/MXene hydrogel (M-hydrogel) coating was developed through facile one-pot heating and freeze-thaw cycle methods, and then painted on wood surface. The coating exhibit excellent self-healing property and significantly enhanced water-retention property (water content ≥90 wt%), due to the increased hydrogen bonds within the coating system with the presence of MXene nanosheets. Compared to pristine wood, the flame retardancy of coated wood is greatly improved, such as passed V0 rating in UL-94 test, increasing time to ignition (TTI, from 32 s to 69 s), and decreased heat release rate (HRR) and total release rate (THR) by 41.6% and 36.14%. The cooling effect and large thermal capacity of high-water-retention hydrogel, and physical barrier effects for flammable gas products, heat and oxygen by MXene nanosheets and the compact char layer formed during combustion play key roles in the flame retardancy enhancements of the wood. High thermal stability of MXene nanosheets is another beneficial factor. The detailed flame-retardant and self-healing mechanisms were proposed." @default.
- W4309261903 created "2022-11-25" @default.
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- W4309261903 date "2022-11-17" @default.
- W4309261903 modified "2023-10-18" @default.
- W4309261903 title "Facile fabrication of a novel self-healing and flame- retardant Hydrogel/MXene coating for wood" @default.
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- W4309261903 doi "https://doi.org/10.21203/rs.3.rs-2234506/v1" @default.
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