[논문]Improvement in mechanical and thermal properties of polypropylene nanocomposites using an extremely small amount of alkyl chain-grafted hexagonal boron nitride nanosheets

Kong, Saerom; Seo, Huiran; Shin, Huiseob; Baik, Ji-Hoon; Oh, Jinwoo; Kim, Young-O.; Lee, Jong-Chan

doi:10.1016/j.polymer.2019.121714

[해외논문] Improvement in mechanical and thermal properties of polypropylene nanocomposites using an extremely small amount of alkyl chain-grafted hexagonal boron nitride nanosheets

Polymer, v.180, 2019년, pp.121714 -

Kong, Saerom (School of Chemical and Biological Engineering, Seoul National University) , Seo, Huiran (School of Chemical and Biological Engineering, Seoul National University) , Shin, Huiseob (School of Chemical and Biological Engineering, Seoul National University) , Baik, Ji-Hoon (School of Chemical and Biological Engineering, Seoul National University) , Oh, Jinwoo (Photo-Electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST)) , Kim, Young-O. (Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST)) , Lee, Jong-Chan (School of Chemical and Biological Engineering, Seoul National University)

Abstract ▼ AI-Helper

Abstract In this study, hexagonal boron nitride nanosheets grafted with aliphatic groups (Alkyl-BN) were synthesized by a sonication-assisted alcoholysis reaction using hexagonal boron nitride (hBN) with 1-dodecanol, and a series of polypropylene (PP) nanocomposites were prepared by mixing PP with different amount of Alkyl-BN. The PP/Alkyl-BN nanocomposite containing a very small amount of Alkyl-BN showed much improved mechanical properties than those of neat PP and PP/hBN nanocomposites. For instance, Young's modulus value of PP/Alkyl-BN nanocomposite containing 0.5 wt% of Alkyl-BN is larger than that of neat PP by 17.5% while that of PP/hBN nanocomposite containing 0.5 wt% of hBN is larger by only 1.2%. The tensile strength value of PP/Alkyl-BN was found to be larger than that of the neat PP by 7.4% due to the enhanced interfacial interaction between Alkyl-BN and PP chains. Furthermore, the PP/Alkyl-BN nanocomposites exhibited enhanced thermal conductivity and stability than the neat PP and PP/hBN nanocomposite. This research clearly shows that the improved thermal and mechanical properties of polymer nanocomposites can be achieved with a very low filler content by the enhancement of the interfacial interaction between the filler materials and the polymer matrix. Highlights Only very small amount, such as 0.1–1.0 wt% of hexagonal boron nitride (hBN)-based filler was used to prepare the polypropylene (PP) composite for the first time. hBN grafted with aliphatic chains (Alkyl-BN) was successfully synthesized by a simple one-step process. PP/ Alkyl-BN nanocomposites showed improved mechanical and thermal properties than those of PP and PP/hBN nanocomposites. Graphical abstract [DISPLAY OMISSION]

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[해외논문] Improvement in mechanical and thermal properties of polypropylene nanocomposites using an extremely small amount of alkyl chain-grafted hexagonal boron nitride nanosheets

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[해외논문] Improvement in mechanical and thermal properties of polypropylene nanocomposites using an extremely small amount of alkyl chain-grafted hexagonal boron nitride nanosheets

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