Resumen

ALVARADO, Enrique Delgado et al. Improvement in the dispersion of TiO₂ particles inside Chitosan-Methyl cellulose films by the use of silane coupling agent. J. Mex. Chem. Soc [online]. 2019, vol.63, n.2, pp.154-168.  Epub 20-Abr-2020. ISSN 1870-249X.  https://doi.org/10.29356/jmcs.v63i2.741.

This work is focused on obtaining composite films based on biopolymer of chitosan and on TiO2 superficially modified through a silanization method, using (3-aminopropyl)-trimethoxysilane (APTMS). This method helped solve specific problems of titanium dioxide, such as the formation of agglomerates, since modified films have a better dispersion. The inclusion of particles in the biopolymer films helped to improve color properties, obtaining luminescence results up to 20% higher than the unmodified particles, which indicates a better dispersion of particles. In addition, there were improvements in the electrostatic repulsion, studied as Z potential, with values of 10 mV for TiO2 and 27 mV for S-TiO2. Finally, better results were obtained in the mechanical properties of the silanized particles, with an improvement of around 28% in low percentages, rising the percentage by increasing S-TiO2.

Palabras llave : Silanization; Chitosan; Biopolymers; Films; Materials.

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