Ultrasound evaluation of the mechanical properties as an investigation tool for the wood-polymer composites including olive wood flour

Bouhamed, Nesrine; Souissi, Slim; Maréchal, Pierre; Amar, Mohamed Ben; Lenoir, Olivier; Léger, Romain; Bergeret, Anne

doi:10.1016/j.mechmat.2020.103445

Cited by 22 publications

(12 citation statements)

References 56 publications

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“…For determination of elastic constants (Young's modulus, Bulk Modulus, Poisson's ratio, Longitudinal Modulus, and Shear Modulus), acoustic impedance, ultrasonic micro‐hardness and grain size, and so forth the quantities should be measured in UT are only ultrasonic wave velocity values (longitudinal wave velocity and shear wave velocity), and attenuation coefficient 38 . UT has been widely carried out in the measurement of isotropic materials' physical properties (elastic constants, microstructural, diffuse discontinuity, and mechanical properties), 41,42,37,43 and the characterization of internal damages, defects, and discontinuities in materials 44–47 . For example, El‐Sabbagh, et al 44 investigated the effect of the natural fiber content on the ultrasound velocity in a composite material.…”

Section: Introductionmentioning

confidence: 99%

Preparation and ultrasonic characterization of modified epoxy resin/coconut shell powder biocomposites

Oral

Kocaman

Ahmetli

2021

J of Applied Polymer Sci

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A new bio‐based epoxy resin (BER) is produced by the esterification reaction between sebacic acid (SAc) as bio‐based acid and epichlorohydrin (ECH). The epoxy resin (ER) is modified with the BER. The biocomposites are prepared using untreated coconut shell powder (CSP), modified coconut shell powder (MCSP), and MER. The CSP and MCSP particles are mixed with MER in varied compositions (10–50 wt%) for preparation of the MER/CSP and MER/MCSP biocomposites. The influences of CSP and MCSP bio‐fillers amounts on the physical properties (density, elastic constants, acoustic impedance, ultrasonic micro‐hardness, and attenuation coefficient) of biocomposites are investigated using the ultrasonic pulse‐echo overlap method (PEOM). It was seen that the densities, both ultrasonic longitudinal and shear waves' velocity values of obtained biocomposites were higher than those of the MER. All elastic moduli of the MER/MCSP biocomposites have higher values than of the neat MER and MER/CSP biocomposites.

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Section: Introductionmentioning

confidence: 99%

Preparation and ultrasonic characterization of modified epoxy resin/coconut shell powder biocomposites

Oral

Kocaman

Ahmetli

2021

J of Applied Polymer Sci

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“…If the specimen is self-extinguished or incombustible in the horizontal burning test, then it is subjected to the vertical burning test. Class of the sample was determined by the sample dripping, its burning state, and combustion time [266,267]. From all the above discussions, it could be stated that the fire retardancy of WPCs was improved by the addition of materials promoting fire resistance.…”

Section: Fire Retardancy Behaviormentioning

confidence: 99%

A Critical Review on Wood-Based Polymer Composites: Processing, Properties, and Prospects

et al. 2022

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Waste recycling is one of the key aspects in current day studies to boost the country’s circular economy. Recycling wood from construction and demolished structures and combining it with plastics forms wood-polymer composites (WPC) which have a very wide scope of usage. Such recycled composites have very low environmental impact in terms of abiotic potential, global warming potential, and greenhouse potential. Processing of WPCs can be easily done with predetermined strength values that correspond to its end application. Yet, the usage of conventional polymer composite manufacturing techniques such as injection molding and extrusion has very limited scope. Many rheological characterization techniques are being followed to evaluate the influence of formulation and process parameters over the quality of final WPCs. It will be very much interesting to carry out a review on the material formulation of WPCs and additives used. Manufacturing of wood composites can also be made by using bio-based adhesives such as lignin, tannin, and so on. Nuances in complete replacement of synthetic adhesives as bio-based adhesives are also discussed by various researchers which can be done only by complete understanding of formulating factors of bio-based adhesives. Wood composites play a significant role in many non-structural and structural applications such as construction, floorings, windows, and door panels. The current review focuses on the processing of WPCs along with additives such as wood flour and various properties of WPCs such as mechanical, structural, and morphological properties. Applications of wood-based composites in various sectors such as automotive, marine, defense, and structural applications are also highlighted in this review.

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“…[22] One of the current research subjects concerns the experimental determinations and the theoretical calculations of elastic properties of composites, related with their morphology and their phase properties. [23,24] Nondestructive testing (NDT) by ultrasound can be used for the determination of different elastic properties (Young's modulus, bulk modulus, shear modulus, longitudinal modulus, acoustic impedance, Poisson's ratio, etc.). In the literature, some studies have focused on the ultrasonic characterization of epoxy matrix composites loaded with particulate reinforcements or powders such as biochar, [25] andesite waste, [26] polyethylene terephthalate carbon powder, [27] and olive stone flour.…”

Section: Introductionmentioning

confidence: 99%

Green epoxy resin/date stone flour biocomposites: Effect of filler chemical treatments on elastic properties

et al. 2021

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This work aims to study the effect of chemical treatments of date stone flour (DSF) as a filler on the elastic properties of biocomposites based on green epoxy resin (GER) used as a matrix. The main disadvantages of natural reinforcements in biocomposites are the poor compatibility between the reinforcement and the matrix as well as the relatively high moisture sorption. Different chemical treatments using soda (alkaline), benzoyl chloride, and potassium permanganate were applied to the DSF filler. Then, the filler was incorporated into the matrix at 30 wt % to obtain GER/DSF biocomposites. The elastic properties of the biocomposites, namely, longitudinal modulus, shear modulus, bulk modulus, Young's modulus of elasticity, acoustic impedance, Poisson's ratio, and ultrasonic microhardness, were determined using ultrasonic through-transmission method. In addition, the morphology was studied using microscopy analysis. The results obtained revealed a decrease of the elastic properties of the pretreated-filler biocomposite compared to the pure GER. On the other hand, the chemical treatment of the filler leads to an improvement of the elastic properties of GER/DSF biocomposites. The permanganate treatment is the most suitable for GER/DSF biocomposites. The morphology analysis through optical microscopy and scanning electron microscopy showed that chemical treatments enhance the interfacial adhesion between the DSF filler and the GER matrix.

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Ultrasound evaluation of the mechanical properties as an investigation tool for the wood-polymer composites including olive wood flour

Cited by 22 publications

References 56 publications

Preparation and ultrasonic characterization of modified epoxy resin/coconut shell powder biocomposites

Preparation and ultrasonic characterization of modified epoxy resin/coconut shell powder biocomposites

A Critical Review on Wood-Based Polymer Composites: Processing, Properties, and Prospects

Green epoxy resin/date stone flour biocomposites: Effect of filler chemical treatments on elastic properties

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