Bio-based Dynamically Crosslinked Networks/fe3o4 Nanoparticles Composites with Self-Healing Ability Driven by Multiple Stimuli for Non-Contact Welding
Industrial crops and products(2023)
摘要
Polymers with repairability driven by multiple stimuli and its functional composite materials are desired for practical applications. However, to date, study on dynamically crosslinked networks with multi-stimuli response or multichannel self-healing ability derived from green, renewable precursors has been rarely reported. Herein, bio-based dynamically crosslinked network based on Schiff base (dynamic imine bonds) and multiple hydrogen bonds were fabricated from soybean oil and vanillin. The reprocessing and self-healing properties could be customized by varying the ratio of methacrylation of the obtained fatty amide (MASO) UV-curable prepolymer and methacrylate functionalized vanillin (MAV). The introduction of Schiff base and hydrogen bonds endowed reprocessability for the material. Moreover, the resulting bio-based dynamically crosslinked network exhibited outstanding self-healing performance stimulated by heat, organic solvent, infrared radiation, and microwave. The bio-based composites with Fe3O4 nanoparticles were also investigated to realize non-contact welding of fracture. This study provided a promising strategy for the development of biomass resources and bio-based dynamically crosslinked network composites with good repairability.
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关键词
Bio-based dynamically crosslinked network,Self-healing,Fe3O4 nanoparticles,Multiple response,Non-contact welding
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