Effect of Chemical treatment on Flexure Properties of Natural Fiber-reinforced Polyester Composite

By M. Rokbi, H. Osmani, Abdellatif Imad, N. Benseddiq. 2011

328 citations recorded by the source corpus.

Abstract This paper focuses on the study of the effect of chemical treatments of fibers by alkalization on the flexural properties of polyester matrix composite reinforced with natural fibers. The used reinforcement consists of Alfa fiber, extracted from the plant Stippa tenacissima from Hodna Region (Algeria). Alfa fibers are subjected to alkali treatments with NaOH at 1, 5 and 10% for a period of 0, 24, and 48 h to 28 °C. The composites reinforced with layers of Alfa random costituente a rate of 40% by weight. Influence of alkaline treatments on the flexural properties is studied to determine the optimum conditions of alkaline treatment. The experimental results show that the bending behavior of composites made from alkali treated fibers are better compared to the untreated fiber composite, For a fiber processing Alfa 10% NaOH in 24 h, the flexural strength and flexural modulus improved by 23 MPa to 57 MPa and from 1.16 to 3.04 GPa. However, the flexural properties of composites decreased after alkali treatment with 5% NaOH for 48 h. This is mainly due to the reduction of lignin that binds the cellulose fibrils together.

Subfields: Mechanical Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/9e2e4ce85335af2d4b6d61c52e79b1d3c27c063b

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In Mechanical Engineering

In Polymers and Plastics

Citations in the corpus

Developments in Chemical Treatments, Manufacturing Techniques and Potential Applications of Natural-Fibers-Based Biodegradable Composites (2021, background): “Cellulose content characterizes the strength and firmness of fiber [43], owing to the number of hydrogen bonds and different linkages that exist in the cellulose [44,45].”
Plant-Based Natural Fibre Reinforced Composites: A Review on Fabrication, Properties and Applications (2020, methodology): “To this end, the fibres are subjected to various chemical treatments [112,113], such as alkali treatment [114–117], silane treatment [118–123], esterification [124–127], acid treatment [128] or hybridization with different fibres [129–136], before reacting with the matrix materials.”
Effects of alkali treatment and elevated temperature on the mechanical properties of bamboo fibre–polyester composites (2015, background): “[25] concluded that the alkali treatment has a significant effect on the flexural properties of composites due to the increased interface between matrix and fibre after treatment.”