期刊
CHEMOSPHERE
卷 311, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2022.137047
关键词
Flame retardancy; Interfacial engineering; Mechanical reinforcement; Eco-friendly; Epoxy resin
In this study, copper organophosphate nanosheets were grown on the surface of graphene oxide to improve the flame retardancy and mechanical properties of epoxy resins. The incorporation of functionalized nanosheets significantly improved the impact strength of the nanocomposites. The nanosheets also inhibited smoke and heat release, making the epoxy matrix more fire-safe.
With the high integration of electronic products in our daily life, high-performance epoxy resins (EP) with excellent flame retardancy, smoke suppression, and mechanical strength are highly desired for applications. In this study, copper organophosphate nanosheets were evenly grown on the surface of graphene oxide (GO) via a self-assembly process based on coordination bonding and electrostatic interactions. The resultant nanohybrid endowed EP with satisfactory flame retardant effect and improved mechanical properties. Incorporating functionalized nanosheets of merely 1 wt% loading, the impact strength of the EP nanocomposites improved by 147% when compared to 1% EP-GO. Additionally, the nanosheets inhibited the smoke and heat release of EP, and the limiting oxygen value of EP-EGOPC reached similar to 29%. The mechanism analysis verified that the existence of organophosphate and copper-containing components associated with the physical barrier of GO promoted the hybrid aromatization of the char layer, thereby improving the fire safety of epoxy matrix. This research offers a new interfacial method for designing functional nanosheets with good interface compatibility and high flame-retardant efficiency in polymers.
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