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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Souissi, Slim
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Publications (6/6 displayed)
- 2022Properties of wood polymer composites based on polypropylene/olive wood flour: effects of fiber treatment and compatibilizercitations
- 2021Physicochemical, Morphological and Thermal Characterization of Composites Based on Olive Wood Flourcitations
- 2020Moisture content in PP/OWF composite plates monitored using ultrasound
- 2020Acoustical surface characterization of PP/OWF composite plates
- 2018Effect of Injection Direction in Elaboration of Polypropylene Reinforced with Olive Wood Flour on Ultrasonic and Morphological Properties ; Effet de la direction d'injection lors de l'élaboration de polypropylène renforcé avec de la farine de bois d'olivier: propriétés ultrasonores et morphologiquescitations
- 2014Optimization of Squeeze Casting Parameters for 2017 A Wrought Al Alloy Using Taguchi Methodcitations
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document
Moisture content in PP/OWF composite plates monitored using ultrasound
Abstract
This work explores a wood-polymer composite (WPC) made of a polypropylene (PP) polymer combined with olive wood flour (OWF). The longitudinal wave propagation is proposed as an evaluation mean of the WPC viscoelastic properties. Depending on the OWF ratio content, varied from 0 to 30%, the flour dispersion is evaluated in a scanned zone in view to assess the assumption of homogeneity of such WPC plates. In addition, the moisture content can be indirectly highlighted, due to the immersion of the plate in water during its analysis using ultrasound. This effect was measured and evaluated as a function of the immersion time. For those ultrasound measurements, a transducer having a center frequency of 15 MHz and focusing at 54.7 mm in water was used. Indeed, scans were performed over a zone of 100×100 mm 2 and reflection echoes were recorded for each (x, y) position, with a 0.1 mm step. Then, the measurement of the amplitude of the specular echo, combined with the time of flight gives an estimate of the moisture content in the plate. The resulting evaluation of the moisture content is analyzed using a Fick diffusion law. The resolution of the resulting information is also discussed as a function of the transducer properties versus those of the WPC plate.