|
|||||
|
|
Environmental resistance of flax/bio-based epoxy and flax/polyurethane composites manufactured by resin transfer moulding |
|
| Affiliation: | 1. Department of Mechanical Engineering, McGill University, 817 Sherbrooke Street West, Montréal, Québec H3A 0C3, Canada;2. Department of Bioresource Engineering, Macdonald Campus, McGill University, Ste-Anne-de-Bellevue, Québec H9X 3V9, Canada;1. KU Leuven – Department of Materials Engineering, Kasteelpark Arenberg 44 – bus 2450, 3001 Heverlee, Belgium;2. McGill University – Department of Mechanical Engineering, 817 Sherbrooke St. West, Montreal, Quebec H3A0C3, Canada;1. Department of Mechanical Engineering, KU Leuven, Belgium;2. Department of Metallurgy and Materials Engineering, KU Leuven, Belgium;1. Faculty of Applied Arts, University of Arts, Belgrade, Kralja Petra 4, 11000 Belgrade, Serbia;2. Department of Industrial Engineering, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy;3. InterDepartmental Center for Industrial Research in Advanced Mechanics and Materials, University of Bologna, Viale Terracini 2, 40133 Bologna, Italy |
| Abstract: | As biocomposites are highly sensitive to water absorption, the aim of this study was to compare the physical properties two biocomposites: (1) a flax/bio-based epoxy (Entropy SUPER SAP CLR/INS) and (2) a flax/polyurethane (HENKEL LOCTITE MAX 3). Both materials were reinforced with 14 layers of flax (TEXONIC twill 2 × 2) and manufactured using a resin transfer moulding process. Post-cured composite samples were aged at 90% RH and 30 °C for various periods of time up to 720 h. The results showed that both composites followed a Fickian diffusion behaviour. Water had a plasticizing effect on the composites and it changed their failure mode. This effect took longer to appear for the polyurethane composites. The chemical bonds between the hydroxyl groups of the fibres and the isocyanate lead to a stronger interface which improved the mechanical properties (short beam and compressive strengths) as compared to the flax/bio-epoxy composites. |
| Keywords: | A Biocomposite A Polymer-matrix composites B Fibre/matrix bond E Resin Transfer Moulding (RTM) |
| 本文献已被 ScienceDirect 等数据库收录！ | |