Influence of gamma and ultraviolet radiation on the mechanical behavior of a hybrid polyester composite reinforced with curaua mat and aramid fabric
| Autor: | Suzane de Sant’ Ana Oliveira, Sergio Neves Monteiro, Helio C. Vital, Karollyne Gomes de Castro Monsores, Anderson Oliveira da Silva, Ricardo Pondé Weber |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Materials science Scanning electron microscope 02 engineering and technology medicine.disease_cause 01 natural sciences Ionizing radiation Biomaterials Flexural strength 0103 physical sciences medicine Irradiation Composite material lcsh:Mining engineering. Metallurgy 010302 applied physics chemistry.chemical_classification Delamination Metals and Alloys Polymer 021001 nanoscience & nanotechnology Surfaces Coatings and Films Aramid chemistry Ceramics and Composites 0210 nano-technology Ultraviolet |
| Zdroj: | Journal of Materials Research and Technology, Vol 9, Iss 1, Pp 394-403 (2020) |
| ISSN: | 2238-7854 |
| Popis: | Functionalization of composite materials by ionizing radiation is considered an environmentally friendly technology to improve the compatibility of natural fibers with a polymer matrix. However, depending on the dose, it might also cause degradation. In particular, the effect of ionizing radiation on hybrid polymer composites reinforced with both naturals and synthetics fibers still needs more attention. In the present work, for the first time, the mechanical behavior of a hybrid polyester composite reinforced with 33 wt% of curaua fibers mat and 7 wt% of aramid fabric subjected to ultraviolet (UV) and gamma ionizing radiation, was investigated. Ultraviolet exposure for 300 and 600 h and gamma radiation doses of 150 and 300 kGy were applied before 3 points bending tests. The results disclose an increase in flexural strength and modulus with increasing UV when compared to other irradiated conditions. Macroscopic observation and scanning electron microscopy analysis of fractured irradiated specimens revealed delamination as the main failure mechanism. Keywords: Flexural properties, Ionizing radiation, Hybrid composite, Curaua mat, Aramid fabric |
| Databáze: | OpenAIRE |
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