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8 results on '"Yosr Ben Mlik"'

1. Study the Effect of Chemical and Enzymatic Extraction Methods on the Kenaf Fibers Properties

Author

Yosr Ben Mlik, Mounir Jaoudi, Fouad Khoffi, Msahli Slah, and Bernard Durand

Subjects
kenaf extraction, fiber morphology, sem, ftir, x-ray, mechanical properties, Science, Textile bleaching, dyeing, printing, etc., TP890-933
Abstract

In this paper, two extraction methods for kenaf fiber, The chemical process and the enzymatic one, were performed. These processes were used to extract fibers from the kenaf stem and the chemical, mechanical and morphologic properties of the extracted fibers were investigated. We notice that the fiber diameter decrease when increasing the concentration of the enzyme and the time treatment (101,35 µm for Enz1 and 91,37 µm for Enz4) the same result is obtained for the chemical extraction when increasing the duration, temperature or NaOH concentration. Also the fiber crystallinity index is improved due to the elimination of the noncellulosic materials from the fiber. The results obtained show that we have an increase in this index for all treated fiber however it is more important for the chemical extraction (crude fiber 57.39%, chemical-treated fiber 71.93% and 66.70% for the enzyme-treated fiber). This increase explains also the increase of fiber tenacity and the decrease of strain and we found through the tensile test that kenaf fiber has a pure elastic behavior for all treated fiber. So, the properties of extracted fibers compared to the crude fibers prove that the enzymatic extraction preserves more the fiber structure than the chemical extraction.

Published
2022
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3. Study the Effect of Chemical and Enzymatic Extraction Methods on the Kenaf Fibers Properties

Author

Bernard Durand, Msahli Slah, Fouad Khoffi, Mounir Jaoudi, and Yosr Ben Mlik

Subjects
Materials science, biology, Materials Science (miscellaneous), 02 engineering and technology, 010501 environmental sciences, 021001 nanoscience & nanotechnology, biology.organism_classification, 01 natural sciences, Kenaf, Chemical engineering, Extraction methods, Fiber, 0210 nano-technology, 0105 earth and related environmental sciences
Abstract

In this paper, two extraction methods for kenaf fiber, The chemical process and the enzymatic one, were performed. These processes were used to extract fibers from the kenaf stem and the chemical, ...

Published
2020

5. Characterization and Investigation of Tensile Properties of Kenaf Fiber Reinforced Polyester Composite Material.

Author

Yosr, Ben Mlik, Mounir, Jaouadi, Foued, Khoffi, Slah, Msahli, and Durand, Bernard

Subjects
*FIBROUS composites, *COMPOSITE materials, *KENAF, *FIBER-matrix interfaces
Abstract

Effect of fiber treatment on the strain We can conclude from figures presented previously that all composite tensile properties are improved when increasing the fiber weight ratio and also after the chemical treatment of the fibers used for. Fiber weight ratio of composites HT

Fiber weight ratio (%)
-NWNTFFNTFNWTFFTF
1Pure polyester composite
27.247.747.407.74
39.259.6210.189.40
411.2511.0611.1010.84
ht The fiber weight was varied when making composites and after that the fiber weight ratio is calculated according to formula 1. But increasing the fiber weight ratio this strain loss is compensated, and there is a slight improvement in strain as compared to the composite made with pure polyester matrix especially in composites made from treated fibers. [Extracted from the article]

Published
2022
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7. Kenaf fibre-reinforced polyester composites: flexural characterization and statistical analysis

Author

Bernard Durand, Sana Rezig, Msahli Slah, Yosr Ben Mlik, Foued Khoffi, and Mounir Jaouadi

Subjects
Materials science, Polymers and Plastics, biology, Flexural modulus, Materials Science (miscellaneous), Composite number, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, biology.organism_classification, 01 natural sciences, Industrial and Manufacturing Engineering, Kenaf, 0104 chemical sciences, Characterization (materials science), Polyester, Flexural strength, Statistical analysis, Composite material, 0210 nano-technology, General Agricultural and Biological Sciences, Reinforcement
Abstract

This paper deals with the effect of the chemical treatment, fibre ratio and fibre reinforcement structure on the flexural properties of kenaf-polyester composites. Composites were made from an unsaturated polyester matrix reinforced with an alkali-treated and virgin kenaf fibres in a loose fibres and nonwovens. Results reveal that alkali treatment improves the flexural properties of composites expect elongation. The same result was obtained when using a nonwoven structure us reinforcement. The best flexural properties were observed for 11.1% fibre weight ratio with the nonwoven structure reinforce composite. The flexural strength and the flexural modulus were 69.5 MPa and 7.11 GPa, respectively, for this composite while it was 42.24 MPa and 3.61, respectively, for polyester samples (no fibre reinforcement). A statistical study was carried out in order to study the effect of the alkali treatment, reinforcement structure and the reinforcement weight ration on the composite properties. This study pro...

Published
2017

8. New lab-scale device for nonwoven production: optimization of setting parameters

Author

Msahli Slah, Mohamed Jmali, Mounir Jaouadi, and Yosr Ben Mlik

Subjects
010407 polymers, Materials science, Textile, Polymers and Plastics, biology, business.industry, Materials Science (miscellaneous), Fiber orientation, Lab scale, Production optimization, 02 engineering and technology, 021001 nanoscience & nanotechnology, biology.organism_classification, 01 natural sciences, Industrial and Manufacturing Engineering, Kenaf, 0104 chemical sciences, Polyester, Contour line, Air permeability specific surface, Composite material, 0210 nano-technology, General Agricultural and Biological Sciences, business
Abstract

This paper studies the effectiveness of lab scale ‘air laid machine’ designed in the Laboratory of Textile Engineering in ISET of Ksar Hellal, Tunisia for production of nonwoven. Three different types of fibers were used: cotton, kenaf, and polyester. The uniformity of the nonwovens made in terms of thickness, weight per unit area (g/m²), air permeability, and mechanical properties were determined through their coefficient of variation. The method used to evaluate the effectiveness is the overload contour plot. This study demonstrated that ‘Airlaid machine’ is compatible with different types of fibers especially at high values of frequency and pressure.

Published
2016

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