Poly(lactic acid)/halloysite nanotubes nanocomposites: Structure, thermal, and mechanical properties as a function of halloysite treatment

Authors

  • Kalappa Prashantha,

    1. Ecole des Mines de Douai, Department of Polymers and Composites Technology and Mechanical Engineering, 941 rue Charles Bourseul, CS 10838, F-59508 Douai Cedex France
    2. Université Lille Nord de France, F-59000, Lille, France
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  • Benoît Lecouvet,

    1. Institute of Condensed Matter and Nanosciences (IMCN), Université Catholique de Louvain, Place Pasteur 1, B-1348 Louvain-la-Neuve, Belgium
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  • Michel Sclavons,

    1. Institute of Condensed Matter and Nanosciences (IMCN), Université Catholique de Louvain, Place Pasteur 1, B-1348 Louvain-la-Neuve, Belgium
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  • Marie France Lacrampe,

    Corresponding author
    1. Ecole des Mines de Douai, Department of Polymers and Composites Technology and Mechanical Engineering, 941 rue Charles Bourseul, CS 10838, F-59508 Douai Cedex France
    2. Université Lille Nord de France, F-59000, Lille, France
    • Ecole des Mines de Douai, Department of Polymers and Composites Technology and Mechanical Engineering, 941 rue Charles Bourseul, CS 10838, F-59508 Douai Cedex France
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  • Patricia Krawczak

    1. Ecole des Mines de Douai, Department of Polymers and Composites Technology and Mechanical Engineering, 941 rue Charles Bourseul, CS 10838, F-59508 Douai Cedex France
    2. Université Lille Nord de France, F-59000, Lille, France
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Abstract

Poly(lactic acid) (PLA)/halloysite nanotubes (HNT) nanocomposites were prepared by melt extrusion using a masterbatch dilution process. Effect of addition of both unmodified halloysites (HNT) and quaternary ammonium salt treated halloysites (m-HNT) was investigated at different nanofiller contents. A homogeneous distribution/dispersion of halloysites in the PLA matrix is obtained for both unmodified and modified nanotubes within the studied composition range. The nucleating effect of halloysites, resulting in a limited increase of degree of crystallinity, is more pronounced in the case of m-HNT. Besides, the rigidity, tensile, flexural, and impact resistances of PLA significantly increase on addition of halloysites, the property improvement being higher for m-HNT than for HNT. Interestingly, there is no significant embrittlement (almost constant elongation at break). Based on micromechanical models, this superior reinforcement efficiency of m-HNT was ascribed to the better interfacial compatibility induced by the modification of the nanotube surface. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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