Multifunctional cotton fabrics with novel antibacterial coatings based on chitosan nanocapsules and polyacrylate

Author(s)

da Silva, Daniel J. ; Ferreira, Rafaela R. ; Ferreira, Greiciele da S. ; Barbosa, Rennan F. S. ; Marciano, Jessica S. ; Camani, Paulo H. ; Souza, Alana G. ; Rosa, Derval S.

• Document type: Journal article
• Source: Journal of Coatings Technology and Research; v. 20, n. 5, p. 15-pg., 2023-04-10.

Abstract

Chitosan is a cationic polysaccharide with intrinsic antimicrobial properties that can be used as an ecological alternative to develop functional materials to inhibit the proliferation of microorganisms. This work evaluates chitosan nanocapsules (CNs) as a self-disinfecting agent to provide bactericidal activity on cotton fabrics (CF), using polyacrylate to bind the CNs on the CF surface. The fabrics were characterized by Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), contact angle (CA), moisture retention, and antimicrobial tests against Escherichia coli and Bacillus subtilis. The FTIR results showed new peaks related to chitosan structure, indicating the adequate fixation of the CNs on the cotton fibers. SEM images corroborated the polyacrylate binder's efficient adhesion, connecting the CNs and the cotton fiber surface. The CF surface properties were considerably modified, while CN/polyacrylate coating promoted antibacterial activity against the B. subtilis (gram-positive bacteria) for the developed wipe, but they do not display bactericidal effects against E. coli (gram-negative bacteria). (AU)

• FAPESP's process: 21/08296-2 - Development of chitosan hydrogels containing modified cellulose nanostructures for metal removal and recovery from contaminated water
• Grantee: Rennan Felix da Silva Barbosa
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 21/14714-1 - Multi-user equipment approved in grant 2020/13703-3: Cromatógrafo de Íons Modular 940 Professional IC Vario
• Grantee: Derval dos Santos Rosa
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 22/01382-3 - Cellulose hydrogels containing modified clays for the removal and recovery of metal ions present in contaminated water
• Grantee: Rafaela Reis Ferreira
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 19/16301-6 - Starch aerogels containing modified nanocellullose for removal of heavy metals in wastewater from the industry sector
• Grantee: Paulo Henrique Camani
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 20/13703-3 - Environmentally friendly porous materials for the recovery and revaluation of metals reclaimed from contaminated water
• Grantee: Derval dos Santos Rosa
• Support Opportunities: Research Projects - Thematic Grants