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Prof. Nawar KADI
Professor

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0 Knitting
0 Composite
0 nonwoven
0 textile engineering
0 Weaving Technology

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Journal article
Published: 01 July 2021 in Fibers
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The versatile bast fiber jute has environmental benefits compared to glass fibers. However, for jute to be used in a composite, the fiber properties need to be altered. This study aims to improve the mechanical properties of jute yarn to make it more suitable for technical applications as a composite. To alter its mechanical properties, jute yarn was immersed in water during microwave treatment. The time and power of the microwave settings differed between runs. Two states of the yarn were tested: fastened and un-fastened. Tensile testing was used at the yarn and fiber level, followed by Fourier-transform infrared spectroscopy (FTIR) and microscopy. The treatment result demonstrated the ability to increase the elongation of the jute yarn by 70%. The tenacity was also increased by 34% in the fastened state and 20% in the un-fastened state. FTIR showed that no change in the molecular structure occurred. The treatments resulted in a change of yarn thickness depending on the state of the yarn. The results indicate that microwave treatment can be used to make jute more suitable for technical applications depending on the microwave treatment parameters.

ACS Style

Felicia Syrén; Joel Peterson; Nawar Kadi. Effects of Microwave Treatment in Immersed Conditions on the Mechanical Properties of Jute Yarn. Fibers 2021, 9, 40 .

AMA Style

Felicia Syrén, Joel Peterson, Nawar Kadi. Effects of Microwave Treatment in Immersed Conditions on the Mechanical Properties of Jute Yarn. Fibers. 2021; 9 (7):40.

Chicago/Turabian Style

Felicia Syrén; Joel Peterson; Nawar Kadi. 2021. "Effects of Microwave Treatment in Immersed Conditions on the Mechanical Properties of Jute Yarn." Fibers 9, no. 7: 40.

Journal article
Published: 20 October 2020 in Sustainability
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Although there has been some research on how to use short fibers from mechanically recycled textiles, little is known about how to preserve the length of recycled fibers, and thus maintain their properties. The aim of this study is to investigate whether a pre-treatment with lubricant could mitigate fiber length reduction from tearing. This could facilitate the spinning of a 100% recycled yarn. Additionally, this study set out to develop a new test method to assess the effect of lubricant loading. Inter-fiber cohesion was measured in a tensile tester on carded fiber webs. We used polyethylene glycol (PEG) 4000 aqueous solution as a lubricant to treat fibers and woven fabrics of cotton, polyester (PES), and cotton/polyester. Measurements of fiber length and percentage of unopened material showed the harshness and efficiency of the tearing process. Treatment with PEG 4000 decreased inter-fiber cohesion, reduced fiber length loss, and facilitated a more efficient tearing process, especially for PES. The study showed that treating fabric with PEG enabled rotor spinning of 100% recycled fibers. The inter-fiber cohesion test method suggested appropriate lubricant loadings, which were shown to mitigate tearing harshness and facilitate fabric disintegration in recycling.

ACS Style

Katarina Lindström; Therese Sjöblom; Anders Persson; Nawar Kadi. Improving Mechanical Textile Recycling by Lubricant Pre-Treatment to Mitigate Length Loss of Fibers. Sustainability 2020, 12, 8706 .

AMA Style

Katarina Lindström, Therese Sjöblom, Anders Persson, Nawar Kadi. Improving Mechanical Textile Recycling by Lubricant Pre-Treatment to Mitigate Length Loss of Fibers. Sustainability. 2020; 12 (20):8706.

Chicago/Turabian Style

Katarina Lindström; Therese Sjöblom; Anders Persson; Nawar Kadi. 2020. "Improving Mechanical Textile Recycling by Lubricant Pre-Treatment to Mitigate Length Loss of Fibers." Sustainability 12, no. 20: 8706.

Journal article
Published: 01 March 2018 in Journal of Composites Science
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This paper investigates the processing parameters for the compression molding of hemp/PLA hybrid yarn biocomposites and their effect on the final mechanical properties. Finite element simulations are used to develop and assess the processing parameters, pressure, temperature, and time. These parameters are then evaluated experimentally by producing the composites by two different methods, to compare the results of experimentally determined processing conditions to parameters determined by the simulation analysis. The assessment of mechanical properties is done with several experimental tests, showing small improvements for the composites produced with the simulation method. The application of the simulation analysis results in considerably reduced processing times, from the initial 10 min to only three minutes, thereby vastly improving the processing method. While the employed methods are not yet able to produce composites with greatly improved mechanical properties, this study can be seen as a constructive approach, which has the ability to lead to further improvements.

ACS Style

Sarah Vogt; Behnaz Baghaei; Nawar Kadi; Mikael Skrifvars. Determination of Processing Parameters for Thermoplastic Biocomposites Based on Hybrid Yarns Using Finite Elements Simulation. Journal of Composites Science 2018, 2, 11 .

AMA Style

Sarah Vogt, Behnaz Baghaei, Nawar Kadi, Mikael Skrifvars. Determination of Processing Parameters for Thermoplastic Biocomposites Based on Hybrid Yarns Using Finite Elements Simulation. Journal of Composites Science. 2018; 2 (1):11.

Chicago/Turabian Style

Sarah Vogt; Behnaz Baghaei; Nawar Kadi; Mikael Skrifvars. 2018. "Determination of Processing Parameters for Thermoplastic Biocomposites Based on Hybrid Yarns Using Finite Elements Simulation." Journal of Composites Science 2, no. 1: 11.

Proceedings
Published: 01 January 2018 in Proceedings
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Friction which happens between plants and soil particles with the agricultural machine parts leads to substantial losses due to wear these parts. Nowadays, polymer matrix composites are playing a great role as a replacement of some critical fast-wearing steel due to their high properties, and this replacement leads to increase the machine reliability besides better corrosion resistance and lighter construction. Five types of composite materials were suggested to replace these steel parts. We chose ESD PA6 G, HD1000, PA6E, PA6G and PA66GF30 as test materials. And two kinds of testing methods were done to test these materials. First one is a pin-on-plate test with sliding abrasive clothes, the second one is a sand slurry test which uses standard abrasive particles. In the pin-on-plate abrasive wear system, we found that PA6G was the best choice of the used polymers because it had the lowest wear rate.

ACS Style

Hasan Muhandes; Gábor Kalácska; Nawar Kadi; Mikael Skrifvars. Pin-on-Plate Abrasive Wear Test for Several Composite Materials. Proceedings 2018, 2, 469 .

AMA Style

Hasan Muhandes, Gábor Kalácska, Nawar Kadi, Mikael Skrifvars. Pin-on-Plate Abrasive Wear Test for Several Composite Materials. Proceedings. 2018; 2 (8):469.

Chicago/Turabian Style

Hasan Muhandes; Gábor Kalácska; Nawar Kadi; Mikael Skrifvars. 2018. "Pin-on-Plate Abrasive Wear Test for Several Composite Materials." Proceedings 2, no. 8: 469.