Fabrication and Characterization of Bacterial Cellulose-Chitosan Magnetic Nanocomposites

In this work, we report the preparation of magnetic bacterial cellulose (bc)-chitosan nanocomposite hydrogel as a novel biocompatible biomaterial. bacterial cellulose is a natural multifunctional polymer which has unique properties including biocompatibility, high purity, porosity, tensile strength, and high-water absorption. chitosan has antibacterial, biocompatibility, biodegradability and self-healing properties, so it is one of the most widely used polymers in medicine and industry. fe3o4 nanoparticles have been incorporated into hydrogel to induce magnetic properties. bc hydrogel has been prepared in the form of powder and film and used separately for the preparation of nanocomposites. physicochemical properties of nanocomposites such as morphology, mechanical properties, and water absorption were investigated. briefly, chitosan was dissolved in 0.5% acetic acid solution and then bc and 0.005 g fe3o4 were added to this solution and placed under a magnetic stirrer overnight. the resulting hydrogel separated by a magnet and freeze-dried. scanning electron microscopy showed successful coating of chitosan in the cellulose matrix. ftir results indicated successful coat of chitosan and fe3o4. the swelling rate of nanocomposites prepared with bacterial cellulose film was higher than nanocomposites made of bc powder. the tensile strength of wet film was higher than the other samples. consequently, it was suggested that due to biocompatibility, self-healing, antibacterial, high thermal and mechanical performance, this magnetic nanocomposite can be used as a green coating for wood products, petrochemical engineering and to stabilize the fabric dyes and produce magnetic, conductive and antibacterial fabrics and used to remove harmful dyes from wastewater.

Fabrication and characterization of bacterial cellulose-chitosan magnetic nanocomposites

In this work, we report the preparation of magnetic bacterial cellulose (BC)-chitosan nanocomposite hydrogel as a novel biocompatible biomaterial. Bacterial cellulose is a natural multifunctional polymer which has unique properties including biocompatibility, high purity, porosity, tensile strength, and high-water absorption. Chitosan has antibacterial, biocompatibility, biodegradability and self-healing properties, so it is one of the most widely used polymers in medicine and industry. Fe3O4 nanoparticles have been incorporated into hydrogel to induce magnetic properties. BC hydrogel has been prepared in the form of powder and film and used separately for the preparation of nanocomposites. Physicochemical properties of nanocomposites such as morphology, mechanical properties, and water absorption were investigated. Briefly, chitosan was dissolved in 0.5% acetic acid solution and then BC and 0.005 g Fe3O4 were added to this solution and placed under a magnetic stirrer overnight. The resulting hydrogel separated by a magnet and freeze-dried. Scanning electron microscopy showed successful coating of chitosan in the cellulose matrix. FTIR results indicated successful coat of chitosan and Fe3O4. The swelling rate of nanocomposites prepared with bacterial cellulose film was higher than nanocomposites made of BC powder. The tensile strength of wet film was higher than the other samples. Consequently, it was suggested that due to biocompatibility, self-healing, antibacterial, high thermal and mechanical performance, this magnetic nanocomposite can be used as a green coating for wood products, petrochemical engineering and to stabilize the fabric dyes and produce magnetic, conductive and antibacterial fabrics and used to remove harmful dyes from wastewater.