Preparation and Characterization of Bacterial Cellulose/TiO₂ Hydrogel Nanocomposite

Abstract:

Bacterial cellulose (BC) is a biopolymer with interesting properties, such as biocompatibility, high tensile strength, high absorption capacity, water retention and high crystallinity. Nanoparticles of titanium dioxide (TiO₂) are extremely important in electrical applications, photocatalysis, sensors and biomedical areas. Multifunctional materials, based on bacterial cellulose, with differentiated properties can be designed from the BC/TiO₂ nanocomposite by ex situ method of sol-gel immersion. It was manufactured as a nanocomposite consisting of BC/TiO₂ hydrogel. Characterizations were carried out by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and fourier transform infrared spectroscopy (FTIR). The morphological analysis of nanocomposite revealed the existence of molecular interaction and adhesion between TiO₂ nanoparticles and cellulosic nanofibers matrix, where the presence of Ti peaks in EDS spectra was discovered, proving the successful incorporation of nanoparticles. The FTIR showed modification on the functional groups, suggesting interaction between the components. The manufacturing of a BC/TiO₂ nanocomposite by method of sol-gel immersion has a great potential for future applications.

• Periodical: Journal of Nano Research (Volume 43)
• Pages: 73-80
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.43.73
• Online since: September 2016
• Authors: Ricardo Brandes, Letícia de Souza, Vanessa Vargas, Eliana Oliveira, Alexandre Mikowski, Claudimir Carminatti, Hazim Al-Qureshi, Derce Recouvreux*
• Keywords: Bacterial Cellulose, Nanocomposite, Sol-Gel Method, Titanium Dioxide

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