Examination of water uptake performance and mechanical properties of PLA/flax fiber biocomposites with the coupling agent

  • Ali Avci Hakkari University, Department of Mechanical Engineering, Hakkari, Türkiye
  • Aysegul Akdogan Eker Yildiz Technical University, Department of Mechanical Engineering, Istanbul, Türkiye
  • Mustafa Bakkal Istanbul Technical University, Department of Mechanical Engineering, Istanbul, Türkiye
  • Mehmet Safa Bodur Yeditepe University, Department of Materials Science and Nanotechnology Engineering, Istanbul, Türkiye

Abstract

The paper reports, the effect of water sorption on the microstructural and flexural properties of the flax fiber/ polylactic acid (PLA) biocomposites compared to the composites with maleic anhydride (MAH) as coupling agents and alkali treatment. In the current study, five different biocomposites which are 15 % wt. flax/PLA, 25 % wt. flax/PLA as control group and15 % wt. flax/PLA, 25 % wt. flax /PLA, and 35% wt. flax / PLA with 5 % wt. MAH was produced. Ten different soaking times were studied to understand the water absorption behavior of the biocomposites. To investigate mechanical properties of the biocomposites impact test was applied on the dry and 750 h, 1850 h water sorption composites. A three-point bending test was performed on the dry and 1850 h water sorption biocomposites to determine flexural properties. Short flax fiber-reinforced PLA matrix biocomposites were compounded using extrusion and manufactured by injection molding. Flax fiber surface was treated using sodium hydroxy solution to advance the interface interaction between fiber-matrix and surface performance of the fiber and matrix. According to the results, alkali treatment improved the water gain resistance of the composites since its enhancement of the interfacial bonding. Alkali-treated composites with maleic anhydride showed the better impact and flexural strength than composites without alkali-treated after 1850 h water sorption.

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Keywords: Biocomposites, Water Uptake, Flexural Performance
Examination of water uptake performance and mechanical properties of PLA/flax fiber biocomposites with the coupling agent
Submitted
2022-01-22
Published
2022-04-01
How to Cite
Avci, A., Akdogan Eker, A., Bakkal, M., & Bodur, M. S. (2022). Examination of water uptake performance and mechanical properties of PLA/flax fiber biocomposites with the coupling agent. Synthesis and Sintering, 2(2), 55-61. https://doi.org/10.53063/synsint.2022.22102
Section
Articles