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• W4387335925 abstract "Abstract Recently developed covalent functionalization of chemically exfoliated MoS 2 (typically in alkyl lithium) allows the formation of chalcogenide‐carbon bonds by reacting with organohalides and aryl diazonium salts. We herein develop a novel method for the covalent functionalization of MoS 2 to yield dodecylated MoS 2 via reductive activation in a strongly reducing sodium‐naphthalene solution and using alkyl sulfide as an electrophile. Dodecylated MoS 2 /polystyrene (PS) composites fabricated by solution casting method. Dodecyl chains are grafted successfully onto MoS 2 nanosheets, which gives rise to the exfoliation level of few‐layer thickness and matched compatibility with the host polymeric matrix. The inclusion of dodecylated MoS 2 at a concentration of 1.0 wt% yields a substantial improvement in both Young's modulus and tensile strength, with a 106.7% increase and a 67% enhancement, respectively, as compared to the performance of pure PS. The enhanced mechanical characteristics can be credited to the uniform dispersion of dodecylated MoS 2 within the PS matrix and enhanced interfacial interaction between the PS material and the filler. The composites demonstrate a significant increase in their glass transition temperature ( T g ). Notably, the dodecylated MoS 2 /PS (1.0 wt%) composite exhibits a 59.8% elevation in storage modulus when compared to pure PS. The coke yield of dodecylated MoS 2 /PS (1.0 wt%) reaches 2.7%, much larger than the value (only 0.2%) for pure PS. The novel functionalization might expedite the applications of molybdenum disulfide in diverse fields. Highlights A novel method for the covalent functionalization of MoS 2 . Dodecylated MoS 2 /PS composites were fabricated via solution casting method. Ultrathin structure of MoS 2 nanosheets was obtained after functionalization. Composites improvement in Young's modulus and tensile strength compared to PS. The composites show significant enhancements in T g ." @default.
• W4387335925 created "2023-10-05" @default.
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• W4387335925 date "2023-10-03" @default.
• W4387335925 modified "2023-10-15" @default.
• W4387335925 title "Covalent functionalization of activated MoS₂ via using alkyl sulfide and their utilization in polymeric composites with mechanical and thermal property enhancements" @default.
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• W4387335925 doi "https://doi.org/10.1002/pc.27746" @default.
• W4387335925 hasPublicationYear "2023" @default.
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