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Preparation and characterization of polylactide/montmorillonite nanocomposites

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Abstract

The montmorillonite, a form of layered silicate, was successfully intercalated into polylactide (PLA) matrix through solvent-casting technique. In addition, PLA/MMT nanocomposite films were produced, in which homogenous distribution of the silicate lamellae plays a key role in the mechanical properties of the films. A small amount(5wt%) of OMMT intercalated into the PLA matrix resulted in their flexibility enhancement, from 3.68%(pure PLA film) to 352.65%. The results of wide-angle X-ray diffraction (WAXD) patterns confirmed that the silicate interlayer distance increased from 3.044 nm (for OMMT) to 3.56nm (for 5wt%, maximum) with increasing OMMT contents, but decreased to 3.319 nm when OMMT content was over 8wt%. FT-IR also verified the molecular-level associations between PLA chains and OMMT lamellae by vibration variances of hydrogen bonding. DSC thermograms demonstrated that thermal stabilities of the nanocomposite films enhanced, due to the silicate lamellae dispersed into PLA matrix.

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Authors and Affiliations

  1. School of Chemical Engineering, Wuhan University of Technology, Wuhan, 430070, China

    Xuanjun Wu  (吴选军) & Yanxiong Wang

  2. School of Natural Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, China

    Jizu Yuan & Yongfu Yu

  3. Changsha Research Institute of Mining and Metallurgy, Changsha, 410012, China

    Yongfu Yu

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  1. Xuanjun Wu  (吴选军)
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  2. Jizu Yuan
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  3. Yongfu Yu
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  4. Yanxiong Wang
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Correspondence to Xuanjun Wu  (吴选军).

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Wu, X., Yuan, J., Yu, Y. et al. Preparation and characterization of polylactide/montmorillonite nanocomposites. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 24, 562–565 (2009). https://doi.org/10.1007/s11595-009-4562-2

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  • DOI: https://doi.org/10.1007/s11595-009-4562-2

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