| Autor: |
Bianchini Silva M; Graduate Program in Metallurgical Engineering (PPGEM), EEIMVR, Fluminense Federal University, Avenida dos Trabalhadores, 420, Volta Redonda 27225-125, RJ, Brazil.; Graduate Program in Chemistry, Institute of Chemistry (IQ), University of Campinas, Rua Josué de Castro, s/n, Cidade Universitária, Campinas 13083-970, SP, Brazil., Costa UO; Graduate Program in Metallurgical Engineering (PPGEM), EEIMVR, Fluminense Federal University, Avenida dos Trabalhadores, 420, Volta Redonda 27225-125, RJ, Brazil., Mattoso LHC; Embrapa Instrumentation, National Laboratory of Nanotechnology for Agribusiness/LNNA, Rua 15 de Novembro, 1452, Centro, São Carlos 13560-970, SP, Brazil., Monteiro SN; Department of Engineering and Materials Science, Military Institute of Engineering (IME), Rio de Janeiro 22290-270, RJ, Brazil., de Souza ML; Department of Chemistry, University of Victoria, Victoria, BC V8P 5C2, Canada., Vitorazi L; Graduate Program in Metallurgical Engineering (PPGEM), EEIMVR, Fluminense Federal University, Avenida dos Trabalhadores, 420, Volta Redonda 27225-125, RJ, Brazil. |
| Abstrakt: |
Hybrid nanocomposites combining biopolymer fibers incorporated with nanoparticles (NPs) have received increasing attention due to their remarkable characteristics. Inorganic NPs are typically chosen for their properties, such as magnetism and thermal or electrical conductivity, for example. Meanwhile, the biopolymer fiber component is a backbone, and could act as a support structure for the NPs. This shift towards biopolymers over traditional synthetic polymers is motivated by their sustainability, compatibility with biological systems, non-toxic nature, and natural decomposition. This study employed the solution blow spinning (SBS) method to obtain a nanocomposite comprising poly(vinyl pyrrolidone), PVA, and gelatin biodegradable polymer fibers incorporated with magnetic iron oxide nanoparticles coated with poly(acrylic acid), PAA 2k , coded as γ-Fe 2 O 3 -NPs-PAA 2k . The fiber production process entailed a preliminary investigation to determine suitable solvents, polymer concentrations, and spinning parameters. γ-Fe 2 O 3 -NPs were synthesized via chemical co-precipitation as maghemite and coated with PAA 2k through the precipitation-redispersion protocol in order to prepare γ-Fe 2 O 3 -NPs-PAA 2k . Biopolymeric fibers containing coated NPs with sub-micrometer diameters were obtained, with NP concentrations ranging from 1.0 to 1.7% wt. The synthesized NPs underwent characterization via dynamic light scattering, zeta potential analysis, and infrared spectroscopy, while the biopolymer fibers were characterized through scanning electron microscopy, infrared spectroscopy, and thermogravimetric analysis. Overall, this study demonstrates the successful implementation of SBS for producing biopolymeric fibers incorporating iron oxide NPs, where the amalgamation of materials demonstrated superior thermal behavior to the plain polymers. The thorough characterization of the NPs and fibers provided valuable insights into their properties, paving the way for their potential applications in various fields such as biomedical engineering, environmental remediation, and functional materials. |
