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Melt processing of ethylene–vinyl acetate/banana starch/Cloisite 20A organoclay nanocomposite films: structural, thermal and composting behavior

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Abstract

This work shows the preparation of ethylene vinyl acetate copolymer/banana starch/Cloisite 20A organoclay (EVA/starch/C20A) nanocomposites by melt processing. Wide angle X-ray diffraction (WAXD), field emission scanning electron microscopy (FE-SEM), differential scanning calorimetry and thermogravimetric analysis were used to characterize the obtained nanocomposites. Mechanical properties were also determined. In addition, the performance of the nanocomposite films under composting was preliminarily studied; it was conducted using the soil burial test method. Despite knowing that the starch is difficult to process by extrusion, nanocomposite films with high homogeneity were obtained. In this case, C20A organoclay acts as an effective surfactant to make the starch natural polymer compatible with the EVA synthetic polymer. The good compatibility between EVA, starch and C20A clay was also deduced by the formation of intercalated and intercalated-exfoliated structures determined by WAXD and FE-SEM. Physical evidence of the damage in EVA/starch/C20A nanocomposite films after the composting test was observed. It is worth noting that despite the absence of starch, the EVA/C20A nanocomposite film, used as a control, also showed surface damage. This behavior is related to the organic modifier linked to clay C20A, which contains molecules derived from fatty acids that can be used as a food source for microorganisms.

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Acknowledgements

This work was financially supported by the PRODEP-SEP of Mexico through grant DSA/103.5/15/11097. The authors also thank R. Cedillo-García and B. Huerta-Martínez for their support in experimental measurements.

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Authors and Affiliations

  1. División de Estudios de Posgrado, Universidad del Papaloapan, Circuito Central No. 200, Col. Parque Industrial, 38301, Tuxtepec, Oaxaca, Mexico

    Miguel A. García-Muñoz

  2. Instituto de Química Aplicada, Universidad del Papaloapan, Circuito Central No. 200, Col. Parque Industrial, 38301, Tuxtepec, Oaxaca, Mexico

    Mario Valera-Zaragoza & Erick A. Juarez-Arellano

  3. Instituto de Biotecnología, Universidad del Papaloapan, Circuito Central No. 200, Col. Parque Industrial, 38301, Tuxtepec, Oaxaca, Mexico

    Alejandro Aparicio-Saguilán, Miguel A. Peña-Rico & Andrés Aguirre-Cruz

  4. Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna 140, Saltillo, Coahuila, 25294, Mexico

    Eduardo Ramírez-Vargas & Saúl Sánchez-Valdes

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  1. Miguel A. García-Muñoz
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  2. Mario Valera-Zaragoza
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  8. Saúl Sánchez-Valdes
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Correspondence to Mario Valera-Zaragoza.

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García-Muñoz, M.A., Valera-Zaragoza, M., Aparicio-Saguilán, A. et al. Melt processing of ethylene–vinyl acetate/banana starch/Cloisite 20A organoclay nanocomposite films: structural, thermal and composting behavior. Iran Polym J 29, 723–733 (2020). https://doi.org/10.1007/s13726-020-00835-3

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  • DOI: https://doi.org/10.1007/s13726-020-00835-3

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