Polímeros: Ciência e Tecnologia
https://revistapolimeros.org.br/article/doi/10.1590/0104-1428.20240129
Polímeros: Ciência e Tecnologia
Original Article

Production and physicochemical characterization of TEMPO-oxidized bacterial cellulose nanofibers from industrial wastea

Kely Silveira Bonfim; Daniella Lury Morgado; Renan da Silva Fernandes; Adhemar Watanuki Filho; Fauze Ahmad Aouada; Márcia Regina de Moura

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Abstract

This study demonstrates the sustainable production and physicochemical characterization of nanofibers from bacterial cellulose (BC) waste generated during the commercial production of wound dressing films, using TEMPO-mediated oxidation. The produced BC nanofibers (TO-BCNF) were evaluated in terms of yield (82.68%) and water content (98.84%), and characterized by Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), and Thermogravimetric Analysis (TGA). TEM revealed nanofibers with an average diameter of 116.07 ± 21.35 nm, while XRD confirmed the preservation of the semi-crystalline structure of BC, with a crystallinity index of 88.15%. TGA indicated thermal stability with degradation onset at 186 °C. The process also preserved the nanofibrillar morphology and the three-dimensional network of BC. This sustainable approach supports the circular bioeconomy by converting industrial waste into functional nanomaterials, offering potential for applications in wound dressings, films, hydrogels, and controlled release systems.

 

 

Keywords

bio-based nanomaterials, nanofibrillated cellulose, circular bioeconomy, oxidative functionalization, biopolymer composites

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