The use of natural fillers as reinforcements for polymer plastics takes place in a variety of industrial applications. Henceforth, the use of theoretical models to predict the properties of such bio-composites is essential. In this work, we estimated the Young’s modulus of poly-lactic acid (PLA) bio-composites reinforced with argan nut shell (ANS) chemically treated particles (successive alkali treatment, bleaching and silane treatments) using five theoretical models and compared the predicted results with our prior experimental results. These models allowed us to study the assumed spherical form of the ANS particles and the adhesion/distribution of these particles in a PLA matrix. The results indicated that the ANS chemically treated particles could be considered as spherical particles having good adhesion with the PLA matrix. In addition, three other mathematical models were used to predict Young’s modulus of the ANS chemically treated particles. The results showed that the highest value of Young modulus among the three treatments was obtained for the ANS alkali-bleached particles. In addition, the silane treatment enhanced the adhesion between the ANS particles and the PLA matrix, but decreased the Young’s modulus value compared to the other two treatments.
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Laaziz et al. (2019) studied this question.
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