| Autor: |
Acosta AP; Postgraduate Program in Mining, Metallurgical and Materials Engineering, Federal University of Rio Grande Do Sul, Porto Alegre 90040-060, RS, Brazil., Esteves B; Department of Wood Engineering, Polytechnic Institute of Viseu, Av. Cor. José Maria Vale de Andrade, 3504-510 Viseu, Portugal., Cruz JAD; Postgraduate Program in Mining, Metallurgical and Materials Engineering, Federal University of Rio Grande Do Sul, Porto Alegre 90040-060, RS, Brazil., Aramburu AB; Postgraduate Program in Mining, Metallurgical and Materials Engineering, Federal University of Rio Grande Do Sul, Porto Alegre 90040-060, RS, Brazil., Kairytė A; Laboratory of Thermal Insulating Materials and Acoustics, Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Linkmenų St. 28, 08217 Vilnius, Lithuania., Członka S; Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland., Ramos DO; Chemical Engineering, Federal University of Rio Grande Do Sul, Porto Alegre 90040-060, RS, Brazil., Goularte MP; Postgraduate Program in Materials Science and Engineering, Federal University of Pelotas, Pelotas 96010-150, RS, Brazil., Delucis RA; Postgraduate Program in Materials Science and Engineering, Federal University of Pelotas, Pelotas 96010-150, RS, Brazil., Gatto DA; Postgraduate Program in Materials Science and Engineering, Federal University of Pelotas, Pelotas 96010-150, RS, Brazil., Amico SC; Postgraduate Program in Mining, Metallurgical and Materials Engineering, Federal University of Rio Grande Do Sul, Porto Alegre 90040-060, RS, Brazil. |
| Abstrakt: |
Prepregs are commonly fabricated with non-renewable petroleum-based materials. To reduce the impact of the manufacturing of these materials and to produce more sustainable prepregs, this research aims to manufacture poly(furfuryl alcohol)/wood veneer prepregs and their posterior molding in laminate composites. For this purpose, the vacuum infusion process was used to impregnate the wood veneers, and compression molding was applied to manufacture three- and four-layer laminate composites. Scanning electronic microscopy was used to evaluate the impregnation. the laminate manufacturing and differential scanning calorimetry were used to predict the shelf-life of the prepregs, Fourier-transform infrared was used to evaluate the induced hydrolysis resistance, and thermogravimetric analysis was used to determine the thermal degradation of the laminates. Moreover, water uptake and flexural, compressive, and tensile properties were evaluated. The kinetic models were effective and showed a shelf life for the laminates of approximately 30 days in storage at -7 °C, which is an interesting result for laminates with lignocellulosic materials. FTIR proved the laminates' excellent resistance to hydrolysis. The water absorption, thermal stability, and mechanical properties did not differ as the amount of wood veneer increased, but these results were up to ~40% higher compared with unidirectional wood laminates found in the literature, which is probably linked to the excellent interface observed with SEM. |
