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PreprintCC BY-NC-NDChemRxiv

Cuban Bentonite/Polymer Nanocomposites: A Sustainable Alternative for Food Packaging

  • C. Leal1,2
  • D. Hernández1,2
  • M. Muñoz-Arias3,4
  • E. Altshuler5,4
  • A. Rivera1,2
5 affiliations
  1. 1Zeolites Engineering Laboratory
  2. 2Institute of Materials Science and Technology (IMRE), University of Havana
  3. 3Faculty of Chemistry
  4. 4University of Havana
  5. 5Complex Systems, Physics Faculty
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Abstract

The environmental impact of conventional polymers has driven the search for sustainable food packaging alternatives. Clay incorporation into polymers matrices has shown to enhance optical, mechanical, and barrier properties. This study evaluates Cuban natural bentonite as a reinforcing phase in hydroxypropyl methylcellulose (HPMC), carboxymethylcellulose (CMC), polyvinyl alcohol (PVA), and polyvinylpyrrolidone (PVP), plus their mixtures (PVA/PVP and PVA/CMC). Films were cast and characterized by XRD, ATR-FTIR, SEM, and water resistance tests; opacity was measured by UV-Vis spectroscopy accounting for thickness. Results indicate that polymer dispersion depends on temperature (CMC fastest). Bent/HPMC films stood out for their superior opacity and water resistance, while Bent/PVA/PVP and Bent/PVA/CMC showed predominantly exfoliated structures, favorable for food packaging applications.

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Cite

BibTeXRIS
BibTeX
@misc{leal2026cuban,
  title = {{Cuban Bentonite/Polymer Nanocomposites: A Sustainable Alternative for Food Packaging}},
  author = {C. Leal and D. Hernández and M. Muñoz-Arias and E. Altshuler and A. Rivera},
  howpublished = {ChemRxiv},
  year = {2026},
  month = sep,
  doi = {10.26434/chemrxiv.15009158/v1},
  url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009158/v1},
  note = {CC BY-NC-ND},
}
RIS
TY  - UNPB
TI  - Cuban Bentonite/Polymer Nanocomposites: A Sustainable Alternative for Food Packaging
AU  - C. Leal
AU  - D. Hernández
AU  - M. Muñoz-Arias
AU  - E. Altshuler
AU  - A. Rivera
PY  - 2026
DA  - 2026/09/21
PB  - ChemRxiv
DO  - 10.26434/chemrxiv.15009158/v1
UR  - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009158/v1
AB  - The environmental impact of conventional polymers has driven the search for sustainable food packaging alternatives. Clay incorporation into polymers matrices has shown to enhance optical, mechanical, and barrier properties. This study evaluates Cuban natural bentonite as a reinforcing phase in hydroxypropyl methylcellulose (HPMC), carboxymethylcellulose (CMC), polyvinyl alcohol (PVA), and polyvinylpyrrolidone (PVP), plus their mixtures (PVA/PVP and PVA/CMC). Films were cast and characterized by XRD, ATR-FTIR, SEM, and water resistance tests; opacity was measured by UV-Vis spectroscopy accounting for thickness. Results indicate that polymer dispersion depends on temperature (CMC fastest). Bent/HPMC films stood out for their superior opacity and water resistance, while Bent/PVA/PVP and Bent/PVA/CMC showed predominantly exfoliated structures, favorable for food packaging applications.
ER  -