• Enhancement of Mechanical and Antimicrobial Properties of Thermoplastic Poly(lactic acid)/Quaternized Chitosan-Saponite Nanocomposites
  • Xi X, Zhen W, Bian S, Wang W
  • 기계적 및 항균특성이 강화된 열가소성 Poly(lactic acid)와 4기화된 Chitosan-Saponite 나노복합체에 관한 연구
Abstract
Water-soluble N-(2-hydroxyl) propyl-3-trimethyl ammonium chitosan chloride (HTCC) was prepared with 2, 3-epoxypropyl trimethyl ammonium chloride grafting to the amino groups of chitosan. Then, chitosan quaternary ammonium intercalated saponite (HTCC-saponite) was synthesized with HTCC and saponite by ultrasonication intercalation. Compared with chitosan, HTCC had a good antibacterial effect. Thermoplastic poly(lactic acid) (PLA)/HTCC-saponite nanocomposites were prepared with HTCC-saponite and PLA by melt intercalation. Fourier transform infrared (FTIR) and nuclear magnetic resonance (1H NMR) showed that HTCC was successfully synthesized by a modified method of two-step reaction. Moreover, X-ray diffraction (XRD) and scanning electron microscope (SEM) also showed that saponite was intercalated or nearly exfoliated by HTCC. It was shown the mechanical properties of PLA/HTCC-saponite nanocomposites attained the optimum when the content of HTCC-saponite was 1 phr. The studies of thermal stability, crystallization and rheological behavior of PLA/HTCC-saponite nanocomposites demonstrated that PLA/HTCC-saponite nanocomposites exhibited high performance compared with PLA.

Keywords: chitosan quaternary ammonium; melt intercalation; poly(lactic acid); saponite; nanocomposites

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    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
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This Article

  • 2015; 39(4): 601-610

    Published online Jul 25, 2015

  • 10.7317/pk.2015.39.4.601
  • Received on Dec 18, 2014
  • Accepted on Feb 18, 2015