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Guesmi A.,Higher Institute of Technological Studies of Ksar Hellal | Ladhari N.,Higher Institute of Technological Studies of Ksar Hellal | Hamadi N.B.,Laboratory of Synthesis Heterocyclic and Natural Substances | Sakli F.,Higher Institute of Technological Studies of Ksar Hellal
Industrial Crops and Products | Year: 2012

Mature red fruits of Opuntia ficus-indica contain two soluble pigment, betanin and indicaxanthin. The optimal conditions for dye extraction were to mix 50g of juice from cactus pears with 100mL of acidified water as solvent for dye extraction. Two main dyes were purified from the pigment extract by chromatography and identified by UV-vis, HPLC and LC-MS techniques as indicaxanthin (15mg per 100g) and betanin (280mg per 100g). The effect of dye bath pH, salt concentration, dyeing time and temperature was studied. The optimal conditions for dyeing modified acrylic fabrics with betanin dye were carried out at 50°C for 45min at pH 5. Un-mordanted samples have good properties of water and washing fastness. Mordant CoSO 4 was found to give good light fastness (rating 5). © 2011 Elsevier B.V.


Guesmi A.,Higher Institute of Technological Studies of Ksar Hellal | Ben hamadi N.,Laboratory of Synthesis Heterocyclic and Natural Substances | Ladhari N.,Higher Institute of Technological Studies of Ksar Hellal | Sakli F.,Higher Institute of Technological Studies of Ksar Hellal
Industrial Crops and Products | Year: 2013

The dyeing of modified acrylic fabrics using indicaxanthin as a natural dye isolated from fruits of Opuntia ficus-indica has been studied in both conventional and ultrasonic techniques. Factors affecting the dyeing properties such as pH values, salt concentration, temperature, duration of dyeing bath, and ultrasonic power were studied. The optimal conditions for dyeing with indicaxanthin dye were carried out at 80 °C for 30. min at pH 3. Sonicator dyeing showed marked improvement in dye uptake. The results of fastness properties of the dyed fabrics were fair to good. Dyeing kinetics using conventional and ultrasonic conditions was compared. Color strength values obtained were found to be higher with ultrasonic than with conventional heating. Dyeing kinetics of modified acrylic fiber with indicaxanthin dye using conventional and ultrasonic conditions were compared. The values of dyeing rate constant, half-time of dyeing and standard affinity and ultrasonic efficiency have been calculated and discussed. © 2012 Elsevier B.V.


Moussa A.,University of Monastir | Marzoug I.B.,University of Monastir | Marzoug I.B.,Higher Institute of Technological Studies of Ksar Hellal | Bouchereb H.,University of Monastir | And 2 more authors.
Journal of Industrial Textiles | Year: 2015

This work reports waterproof breathable coated double-sided knitting consisting of cotton and polyester fibres. Two kinds of fabrics (F1 and F2) were tested in this study. They were treated with water-repellent chemicals finishing carried out on the polyester side. The main goal of this paper is to study the application and behaviour of double-sided knitting and the finishing with new chemical product to improve comfort. Optimisation of waterproof breathable property of samples was investigated using factorial experimental design. The combined effects of parameters which can affect treatment on water repellency, air permeability and porosity were then studied and the optimum conditions were determined. Waterproof breathable double-sided knitting was able to be generated. These fabrics are supposed to be used as the shoes lining. © 2015, © The Author(s) 2015.


Guesmi A.,Higher Institute of Technological Studies of Ksar Hellal | Hamadi N.B.,Laboratory of Synthesis Heterocyclic and Natural Substances | Ladhari N.,Higher Institute of Technological Studies of Ksar Hellal | Sakli F.,Higher Institute of Technological Studies of Ksar Hellal
Industrial Crops and Products | Year: 2012

This research work involves the dyeing of wool with indicaxanthin, a natural dye extracted from fruits of Opuntia ficus-indica. The optimal conditions for dye extraction were to mix 50g of Juice from cactus pears with 100mL of 80% aqueous ethanol as solvent for dye extraction. Liquid chromatography was applied for the separation. Two main dyes were obtained, which were identified as indicaxanthin (75mg per 50g) and betanin (5mg per 50g). The effect of dye bath pH, salt concentration, dyeing time and temperature were studied. The optimal conditions for wool dyeing with indicaxanthin dye were carried out at 70°C for 90min with the pre-treatment of various metal salts as mordant. The colour yields of the dye on the wool were found to be highly dependent of the pH, optimum results being obtained at pH 4. The K/S of wool increased in the order of the dyeing using KAl (SO 4) 2>MnSO 4>CoSO 4>FeSO 4>none>ZnSO 4>CuSO 4. Un-mordanted samples have good properties of water and washing fastness. Mordants KAl (SO 4) 2 and CoSO 4 were found to give good light fastness (rating 5). © 2011 Elsevier B.V.

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