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- W4220983417 abstract "• A multifunctional small molecule (HCPA) has been prepared. • The presence of HCPA endowed PVA with a nanostructure within the continuous matrix. • 5 wt% of HCPA endows PVA with a self-extinguishing behavior. • 5 wt% of HCPA increases tensile strength of PVA by 47% and toughness by 370%. • The PVA/HCPA composites exhibit a water-trigged healing efficiency over 90%. The combination of high fire retardancy, high strength, and great toughness as well as good healability is essential for successful real-world applications of polymeric materials in the fields of packaging, electronics & electrics, and optical devices. To date, there have been few successes in achieving such performance portfolios in polymers due to their different and even mutually exclusive governing mechanisms. Inspired by the nanoconfinement effect that governs the unique mechanical properties of spider silk, we, herein, rationally design a multifunctional small molecule, HCPA, that can serve as a fire retardant and hydrogen-bond crosslinker for poly(vinyl alcohol) (PVA). Benefiting from the dual-phase fire-retardancy effect and the dynamic cross-linking effect, the addition of 5.0 wt% of HCPA enables PVA to achieve a desired self-extinguishment in combination with a high tensile strength of 133 MPa and a toughness of 112 MJ/m 3 . In addition, the as-prepared polymer material exhibits a high healing efficiency of over 90% (based on strength) if triggered by water. This proof-of-concept opens numerous opportunities for the creation of self-extinguishing, strong, tough, and self-healing polymers for many high-end applications in the above-mentioned industries." @default.
- W4220983417 created "2022-04-03" @default.
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- W4220983417 date "2022-07-01" @default.
- W4220983417 modified "2023-10-17" @default.
- W4220983417 title "Small multiamine molecule enabled fire-retardant polymeric materials with enhanced strength, toughness, and self-healing properties" @default.
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- W4220983417 doi "https://doi.org/10.1016/j.cej.2022.135645" @default.
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