Hybrid epoxy composites made from treated curauá fibres and organophilic clay
| Autor: | Antonio Claudio Kieling, Abderrezak Bezazi, Jamile Dehaini, Gilberto Garcia del Pino, Maria das Graças da Silva Valenzuela, Jose Luis Valin Rivera, Cláudia Cândida Silva, Haithem Boumediri, Túlio Hallak Panzera, Francisco Rolando Valenzuela Díaz |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
010407 polymers Materials science Mechanical Engineering Composite number 02 engineering and technology Epoxy Polymer 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry Mechanics of Materials visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Composite material 0210 nano-technology |
| Zdroj: | Journal of Composite Materials. 55:57-69 |
| ISSN: | 1530-793X 0021-9983 |
| DOI: | 10.1177/0021998320945785 |
| Popis: | This work evaluates an epoxy composite reinforced with curauá fibres and/or organophilic clay. Epoxy polymers reinforced with nano-clays are also assessed. Composites are manufactured by cold pressing using fibres in pristine and treated conditions. Three levels of the factors NaOH solution (2.5, 5 and 10%) and immersion time (2, 4 and 10 hours) are investigated. Nano-clays are incorporated at the levels of 2.5, 5 and 10 wt.%. The morphology and crystallinity of the treated fibres are evaluated by scanning electron microscopy and X-ray diffraction, respectively. Tensile, three-point bending and impact tests are performed to characterise the composites. Tensile strength, flexural strength and impact resistance are increased by 24%, 44% and 47%, respectively, when compared to untreated fibre composites. The highest tensile and flexural strengths are achieved by hybrid composites containing 5 wt.% of nano-clay and 20 wt.% of curauá fibres treated with 5% NaOH for 4 hours. In contrast, the highest tensile modulus is achieved when hybrid composites are made from untreated fibres and 10 wt.% of nanoparticles. The highest impact resistance is obtained by curauá composites, without particles, composed of fibres treated with 5% NaOH for 4 hours. The inclusion of nano-clay leads to reduced impact resistance values. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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