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Ibtissem Moussa,Ramzi Khiari,Ali Moussa,Mohamed Naceur Belgacem,Mohamed Farouk Mhenni 한국섬유공학회 2019 Fibers and polymers Vol.20 No.5
This paper describes the use of agricultural wastes for the preparation of carboxymethylcellulose (CMC) with ahigh degree of substitution using two methods: the classic and a microwave-assisted method. A series of CMC samples withdegrees of substitution from 0.43 to 2.83 were prepared from cellulose extracted from almond shells, almond stems, and figstems by a one-step carboxymethylation reaction. The highest degree of substitution was 2.83, which corresponded to CMCfrom fig stems when butanol was used as a solvent. This CMC was easily dissolved in water and thus would provide manyopportunities for diverse applications. The obtained CMCs were characterized using different tools. Different CMC filmswere prepared using the casting method and were characterized by the determination of their mechanical properties. Theobtained results can be considered promising; they demonstrate the potential of using cellulose derivatives for the productionof transparent and strong films.
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Marwa Souissi,Ramzi Khiari,Mounir Zaag,Nizar Meksi,Hatem Dhaouadi 한국섬유공학회 2022 Fibers and polymers Vol.23 No.10
Bicomponent polyesters filaments are increasingly used in the textile fields due to their technical and highperformances (mechanical, physical, and chemical properties) comparing to conventional polyethylene terephthalate andElasthaneTM thermoplastic polyether polyurethane used in denim fabrics. The purpose of this work is to evaluate the stabilityof the mechanical and physical properties of bicomponent filaments before and after dyeing with three disperse dyes havingdifferent molecular weights (low, medium, and high). Bicomponent filaments composed of two filaments extruded side byside with two unequal proportions 60 % polyethylene terephthalate (PET) and 40 % polytrimethylene terephthalate (PTT) areused in this study. A full factorial experimental design was established to analyze the dyeing parameters effect (temperatureand pH value of dye bath) and optimize the color strength (K/S) while maintaining the stability of the mechanical andphysical properties of bicomponent filaments. After dyeing, these properties were evaluated and their stability was provedusing several analysis techniques such as SEM, DSC, and XRD.
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