Mechanical properties of flax fiber‐reinforced composites at different relative humidities: Experimental, geometric, and displacement potential function approaches

2020 ◽  
Vol 41 (12) ◽  
pp. 4963-4973 ◽  
Author(s):  
Abdul Moudood ◽  
Anisur Rahman ◽  
Nayeem Md Lutful Huq ◽  
Andreas Öchsner ◽  
Md Mainul Islam ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Potential Function ◽  
Flax Fiber ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Displacement Potential

scholarly journals An Innovative Treatment Based on Sodium Citrate for Improving the Mechanical Performances of Flax Fiber Reinforced Composites

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 559
Author(s):  
Vincenzo Fiore ◽  
Dionisio Badagliacco ◽  
Carmelo Sanfilippo ◽  
Riccardo Miranda ◽  
Antonino Valenza
Keyword(s):  
Mechanical Properties ◽  
Sodium Citrate ◽  
Flax Fiber ◽  
Fiber Reinforced Composites ◽  
Alkaline Solutions ◽  
Infrared Analysis ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Flax Fibers ◽  
Mechanical Performances

The goal of this paper is to evaluate the effectiveness of a cost-effective and eco-friendly treatment based on the use of sodium citrate (Na3C6H5O7) on the mechanical properties of flax fiber reinforced composites. To this scope, flax fibers were soaked in mildly alkaline solutions of the sodium salt at different weight concentration (i.e., 5%, 10% and 20%) for 120 h at 25 °C. The modifications on fibers surface induced by the proposed treatment were evaluated through Fourier transform infrared analysis (FTIR), whereas scanning electron microscope (SEM) and helium pycnometer were used to obtain useful information about composites morphology. The effect of the concentration of the treating solution on the mechanical response of composites was determined through quasi-static tensile and flexural tests, Charpy impact tests and dynamical mechanical thermal (DMTA) tests. The results revealed that composites reinforced with flax fibers treated in 10% solution exhibit the best mechanical performances as well as the lowest void contents. SEM analysis supported these findings showing that, by treating fibers in solutions with concentration up to 10%, composites having better morphology can be manufactured, in comparison to untreated ones. Conversely, higher Na3C6H5O7 concentrations negatively affect both the morphology and the mechanical properties of composites.

scholarly journals Effectiveness of Sodium Acetate Treatment on the Mechanical Properties and Morphology of Natural Fiber-Reinforced Composites

2021 ◽  
Vol 6 (1) ◽  
pp. 5
Author(s):  
Dionisio Badagliacco ◽  
Vincenzo Fiore ◽  
Carmelo Sanfilippo ◽  
Antonino Valenza
Keyword(s):  
Mechanical Properties ◽  
Sodium Acetate ◽  
Mechanical Performance ◽  
Flax Fiber ◽  
Fiber Reinforced Composites ◽  
Sodium Acetate Solution ◽  
Acetate Solution ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Flax Fibers

This paper aims to investigate the ability of an eco-friendly and cheap treatment based on sodium acetate solutions to improve the mechanical properties of flax fiber-reinforced composites. Flax fibers were treated for 5 days (i.e., 120 h) at 25 °C with mildly alkaline solutions at 5%, 10% and 20% weight content of the sodium salt. Quasi-static tensile and flexural tests, Charpy impact tests and dynamical mechanical thermal (DMTA) tests were carried out to evaluate the mechanical properties of the resulting composites. Fourier transform infrared analysis (FTIR) was used to evaluate the chemical modification on the fibers surface due to the proposed treatment, whereas scanning electron microscope (SEM) and helium pycnometry were used to get useful information about the morphology of composites. It was found that the treatment with 5% solution of sodium acetate leads to the best mechanical performance and morphology of flax fiber-reinforced composites. SEM analysis confirmed these findings highlighting that composites reinforced with flax fibers treated in 5% sodium acetate solution show an improved morphology compared to the untreated ones. On the contrary, detrimental effects on the morphology as well as on the mechanical performance of composites were achieved by increasing the salt concentration of the treating solution.

Improved mechanical properties of carbon nanotubes-coated flax fiber reinforced composites

2014 ◽  
Vol 50 (3) ◽  
pp. 1117-1128 ◽  
Author(s):  
Yan Li ◽  
Chaozhong Chen ◽  
Jie Xu ◽  
Zhongsen Zhang ◽  
Bingyan Yuan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Flax Fiber ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced
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