Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Poly(lactic acid)/Wood Flour/Montmorillonite Nanocomposites (I) : Tensile and Morphological Properties

  • Kim, Jin-Sung (Department of Material Science and Engineering, Korea University) ;
  • Lee, Sun-Young (Division of Environmental Material Engineering Department of Forest Products Korea Forest Research Institute) ;
  • Doh, Geum-Hyun (Division of Environmental Material Engineering Department of Forest Products Korea Forest Research Institute) ;
  • Kang, In-Aeh (Division of Environmental Material Engineering Department of Forest Products Korea Forest Research Institute) ;
  • Yoon, Ho-Gyu (Department of Material Science and Engineering, Korea University)
  • Received : 2009.04.30
  • Accepted : 2009.07.03
  • Published : 2009.09.25
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Abstract

This study investigates the tensile and morphological properties of nanocomposites prepared from poly(lactic acid) (PLA), wood flour (WF) and montmorillonite (MMT) by melt compounding with a twin screw extruder. In order to enhance the mechanical properties of PLA/WF composites, maleic anhydride grafted PLA (MAPLA) is synthesized as a compatibilizer. MAPLA prepared in the laboratory is characterized using FT-IR (Fourier transformed infrared spectroscopy). From the results of X-ray diffraction (XRD) and transmission electron microscopy (TEM) analysis for nanocomposites, we confirmed that silicate layers of MMT are intercalated and partially exfoliated. When 2 wt% MAPLA is added, the tensile strength and modulus of PLA/WF/MAPLA composites were higher than those of the PLA/WF composite. The addition of MMT increases the tensile modulus of PLA/WF/MAPLA composites but decreases the tensile strength.

Keywords

References

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