The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Padma S Vankar - One of the best experts on this subject based on the ideXlab platform.
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chemical characterisation of extract derived from daphne papyraceae and Sonicator dyeing of cotton silk and wool with the extract
Pigment & Resin Technology, 2009Co-Authors: Padma S Vankar, Rakhi Shanker, Shalini Dixit, Debajit Mahanta, S TiwariAbstract:Purpose – The purpose of this paper is to evaluate the efficiency of ultrasonication on new natural dye obtained from leaves and stem extracts of Daphne papyraceae using metal mordant for good cotton, silk and wool dyeing prospects. It also proposes to effect the characterisation of the colorant.Design/methodology/approach – For effective natural dyeing with leaves and stem extracts of D. papyraceae, both conventional and sonication methods for cotton, silk and wool dyeing were carried out using metal mordants. The purpose of using sonication was for betterment of dye uptake, improved dye adherence and good wash and light fastnesses. Results show marked improvement by the chosen dyeing method. Simultaneously, chemical characterisation of the colorant was carried out by first column chromatographic separation of the crude extract, followed by spectral analysis of the isolated products.Findings – The superiority of Sonicator dyeing over conventional dyeing in terms of enhanced resource productivity and, as ...
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dyeing cotton silk and wool yarn with extract of garcinia mangostana pericarp
Journal of textile and apparel technology and management, 2009Co-Authors: Padma S VankarAbstract:Aqueous extract of pericarp of Garcinia was prepared by Sonicator for quick extraction of the colorant and has been used for dyeing cotton, silk and wool yarn. 1-2 % of premordanting with metal salts of Al, Sn, Fe, Cr and Cu was done. Fe, cu and Cr are best suited mordants for garcinia. The hue color ranged from camel brown to dark chocolate brown. The color strength K/S has been found to be very good in dyed samples. The fastness properties have also been evaluated and were found to be well above the acceptable limits.
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Sonicator dyeing of cotton wool and silk with the leaves extract
Journal of textile and apparel technology and management, 2009Co-Authors: Padma S VankarAbstract:Malus sikkimensis. (Local name- Chap shaw sheng) belongs to family Rosaceae is being primarily used for preparing tea by Monpas tribes of Arunachal Pradesh. In the present study Sonicator dyeing with Malus extract has been demonstrated. Pretreatment with 1-2 % metal mordant and using 5 % of plant extract (owf) was found to be optimum and showed very good hue colors for cotton, wool and silk dyed fabrics. We have demonstrated that the use of sonication in conjunction with metal mordanting has a synergistic effect on better dye uptake, dye adherence and eventually on good fastness properties of the dyed swatches of cotton, silk and wool.
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Sonicator dyeing of cotton fabric and chemical characterization of the colorant from melastoma malabathricum
Pigment & Resin Technology, 2009Co-Authors: Padma S Vankar, V Tiwari, L W Singh, L PotsangbamAbstract:Purpose – The purpose of this paper is to evaluate the dyeing potentials of Melastoma malabathricum whose fruit pulp showed high dye contents. It is an abundantly available shrub in the north eastern forests of India.Design/methodology/approach – Dye extraction was carried out by conventional heating and Sonicator. The dyebility of the aqueous extract of melastoma was evaluated for dyeing cotton fabric by two methods – sonication and conventional heating. The purpose of using sonication was for betterment of dye uptake, improved dye adherence and good wash and light fastnesses.Findings – The test results showed that choosing this dyeing method produced improved results. The superiority of Sonicator dyeing over conventional dyeing in terms of enhanced resource productivity and as a result, reduced wastes, makes it the established best available technique in the natural dyeing industry. Use of Sonicator shows marked enhancement for cotton dyed fabric. Typical bath liquor to fabric ratio for conventional dye...
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Sonicator dyeing of cotton with the leaves extract acer pectinatum wallich
Pigment & Resin Technology, 2008Co-Authors: Padma S Vankar, Rakhi Shanker, Shalini Dixit, Debajit Mahanta, S.c. TiwariAbstract:Purpose – The purpose of this paper is to evaluate the efficiency of ultrasonication on new natural dye obtained from leaves extract of Acer pectinatum Wallich using metal mordant for good cotton dyeing prospects.Design/methodology/approach – For effective natural dyeing with leaves extract of Acer pectinatum Wallich, both conventional and sonication methods of dyeing were carried out using metal mordants. The purpose of using sonication was for improvement of dye uptake, improved dye adherence and good wash and light fastnesses. Results show marked improvement by the chosen dyeing method.Findings – The superiority of Sonicator dyeing over conventional dyeing in terms of enhanced resource productivity and, as a result, reduced wastes establishes it as the best available technique in the natural dyeing industry. Use of Sonicator shows marked enhancement for cotton dyed fabric. Typical bath liquor to fabric ratio for conventional dyeing varies from 20:1 to 15:1 and for Sonicator dyeing from only 12:1 to 10:...
S.c. Tiwari - One of the best experts on this subject based on the ideXlab platform.
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Sonicator dyeing of cotton with the leaves extract acer pectinatum wallich
Pigment & Resin Technology, 2008Co-Authors: Padma S Vankar, Rakhi Shanker, Shalini Dixit, Debajit Mahanta, S.c. TiwariAbstract:Purpose – The purpose of this paper is to evaluate the efficiency of ultrasonication on new natural dye obtained from leaves extract of Acer pectinatum Wallich using metal mordant for good cotton dyeing prospects.Design/methodology/approach – For effective natural dyeing with leaves extract of Acer pectinatum Wallich, both conventional and sonication methods of dyeing were carried out using metal mordants. The purpose of using sonication was for improvement of dye uptake, improved dye adherence and good wash and light fastnesses. Results show marked improvement by the chosen dyeing method.Findings – The superiority of Sonicator dyeing over conventional dyeing in terms of enhanced resource productivity and, as a result, reduced wastes establishes it as the best available technique in the natural dyeing industry. Use of Sonicator shows marked enhancement for cotton dyed fabric. Typical bath liquor to fabric ratio for conventional dyeing varies from 20:1 to 15:1 and for Sonicator dyeing from only 12:1 to 10:...
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Sonicator dyeing of natural polymers with symplocos spicata by metal chelation
Fibers and Polymers, 2008Co-Authors: Padma S Vankar, Rakhi Shanker, Dimpy Mahanta, Shalini Dixit, S.c. TiwariAbstract:Symplocos spicata (local name : Dom sheng) belonging to Family Symplococeae produces yellowish brown natural dye which has been used for dyeing textiles since ancient times by the Monpas tribe of Arunachal Pradesh. Symplocos spicata (Dom Sheng) was found in the Lumla area of Tawang district. Leaves of the plant are used by the Monpas and Tibetans for extraction of dye. Innovative Sonicator dyeing with S. spicata showed that pretreatment with 2-4 % metal mordant of the weight of the fabric is optimum showing very good fastness properties for dyed natural polymers such as cotton, wool, and silk. CIELab and K/S of the dyed fabrics were also evaluated. The superiority of Sonicator dyeing over conventional dyeing has been established through this study.
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Ecofriendly Sonicator dyeing of cotton with Rubia cordifolia Linn. using biomordant
Dyes and Pigments, 2008Co-Authors: Padma S Vankar, Rakhi Shanker, Debajit Mahanta, S.c. TiwariAbstract:Rubia cordifolia (Tamin, local name) produces anthraquinone reddish orange dyes in roots, stem and leaves, which has been used for dyeing textiles since ancient times. Commercial Sonicator dyeing with Rubia showed that pretreatment with biomordant, Eurya acuminata DC var euprista Karth. (Theaceae family) [local name, Nausankhee (Apatani tribe), Turku (Nyishi tribe) in 2%] shows very good fastness properties for dyed cotton using dry powder as 10% of the weight of the fabric is optimum. Use of biomordant replaces metal mordants making natural dyeing ecofriendly.
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Sonicator dyeing of modified cotton, wool and silk with Mahonia napaulensis DC. and identification of the colorant in Mahonia
Industrial Crops and Products, 2008Co-Authors: Padma S Vankar, Rakhi Shanker, Shalini Dixit, Debajit Mahanta, S.c. TiwariAbstract:Mahonia napaulensis DC. (local name—Taming) family Berberidaceae, produces natural dye from its stem which has been used for dyeing textiles by the Apatanis (a tribe of Arunachal Pradesh) since ancient times. Sonicator dyeing with Mahonia napaulensis showed marked improvement in dye uptake. It showed that pretreatment with metal mordant (2%, w/w with respect to the fabric) improved substantially the fastness properties for dyed cotton, silk fabrics and wool yarn. Five fractions were isolated from column chromatography of the stem extract of Mahonia. Attempts have been made to identify these fractions by matching the spectral data which indicated that they were from a well-known isoquinoline alkaloid family.
Ahlem Guesmi - One of the best experts on this subject based on the ideXlab platform.
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improving dyeability of modified cotton fabrics by the natural aqueous extract from red cabbage using ultrasonic energy
Carbohydrate Polymers, 2016Co-Authors: Manel Ben Ticha, Wafa Haddar, Nizar Meksi, Ahlem Guesmi, Farouk M MhenniAbstract:Abstract The concern regarding sustainable utilization of available resources is growing due to its global importance. In this paper, the dyeability of cotton fabrics with natural colorant extracted from red cabbage was improved by applying cationic groups on cotton fibers. Modification of cotton was carried using acid tannic, Rewin Os, Denitex BC and Sera Fast as cationic agents. The dyeing process was done by ultrasonic energy. The effects of the cationising agent amount, the dye bath pH, the dyeing temperature and duration, on the Sonicator dyeing quality were studied. The performances of this process were evaluated by measuring the colour yield (K/S) and the dyeing fastness of the coloured cotton. Besides, modified cotton fibers were characterized by morphology analysis (SEM) and Fourier transform infrared (FTIR) spectra and compared to untreated cotton. Moreover, a two-level full factorial design was employed to optimize the Sonicator dyeing process. Mathematical model equation and statistical analysis were derived by computer simulation programming applying the least squares method using Minitab 15. Best dyeing conditions were found to be: 10%, pH 11, 60 min and 100 °C respectively for the Sera Fast amount, dye bath pH, dyeing duration and temperature.
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Sonicator dyeing of modified acrylic fabrics with indicaxanthin natural dye
Industrial Crops and Products, 2013Co-Authors: Ahlem Guesmi, Ben N Hamadi, Neji Ladhari, Faouzi SakliAbstract:Abstract 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.
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first application of chlorophyll a as biomordant Sonicator dyeing of wool with betanin dye
Journal of Cleaner Production, 2013Co-Authors: Ahlem Guesmi, Neji Ladhari, Naoufel Ben Hamadi, Moncef Msaddek, Faouzi SakliAbstract:Abstract In this research, extraction of dyes from Opuntia ficus-indica was conferred by ultrasound. Dyes extracted and isolated from Opuntia ficus-indica plant were separated by fractional crystallization method and characterized by mass techniques. The dyeing of wool fabric using betanin as natural dye and Chlorophyll- a as biomordant has been studied. Results show an increase in the colour strength values with increasing the concentration of biomordant. The effect of treatment variables on the colour strength of dyed fibres was also examined. It was found that pH and temperature of dyeing influences considerably the results; this is mainly linked to the stability conditions of betanin dye. Dye exhaustion was studied in both conventional and ultrasonic dyeing process. It was shown that sonication improve dye exhaustion from rating 30% to rating 60% in a shorter dyeing time. The fastness properties of dyed wool against washing, light, dry and wet rubbing were evaluated. Un-mordanted and mordanted samples have good fastness properties.
Faouzi Sakli - One of the best experts on this subject based on the ideXlab platform.
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Sonicator dyeing of modified acrylic fabrics with indicaxanthin natural dye
Industrial Crops and Products, 2013Co-Authors: Ahlem Guesmi, Ben N Hamadi, Neji Ladhari, Faouzi SakliAbstract:Abstract 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.
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first application of chlorophyll a as biomordant Sonicator dyeing of wool with betanin dye
Journal of Cleaner Production, 2013Co-Authors: Ahlem Guesmi, Neji Ladhari, Naoufel Ben Hamadi, Moncef Msaddek, Faouzi SakliAbstract:Abstract In this research, extraction of dyes from Opuntia ficus-indica was conferred by ultrasound. Dyes extracted and isolated from Opuntia ficus-indica plant were separated by fractional crystallization method and characterized by mass techniques. The dyeing of wool fabric using betanin as natural dye and Chlorophyll- a as biomordant has been studied. Results show an increase in the colour strength values with increasing the concentration of biomordant. The effect of treatment variables on the colour strength of dyed fibres was also examined. It was found that pH and temperature of dyeing influences considerably the results; this is mainly linked to the stability conditions of betanin dye. Dye exhaustion was studied in both conventional and ultrasonic dyeing process. It was shown that sonication improve dye exhaustion from rating 30% to rating 60% in a shorter dyeing time. The fastness properties of dyed wool against washing, light, dry and wet rubbing were evaluated. Un-mordanted and mordanted samples have good fastness properties.
Rakhi Shanker - One of the best experts on this subject based on the ideXlab platform.
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chemical characterisation of extract derived from daphne papyraceae and Sonicator dyeing of cotton silk and wool with the extract
Pigment & Resin Technology, 2009Co-Authors: Padma S Vankar, Rakhi Shanker, Shalini Dixit, Debajit Mahanta, S TiwariAbstract:Purpose – The purpose of this paper is to evaluate the efficiency of ultrasonication on new natural dye obtained from leaves and stem extracts of Daphne papyraceae using metal mordant for good cotton, silk and wool dyeing prospects. It also proposes to effect the characterisation of the colorant.Design/methodology/approach – For effective natural dyeing with leaves and stem extracts of D. papyraceae, both conventional and sonication methods for cotton, silk and wool dyeing were carried out using metal mordants. The purpose of using sonication was for betterment of dye uptake, improved dye adherence and good wash and light fastnesses. Results show marked improvement by the chosen dyeing method. Simultaneously, chemical characterisation of the colorant was carried out by first column chromatographic separation of the crude extract, followed by spectral analysis of the isolated products.Findings – The superiority of Sonicator dyeing over conventional dyeing in terms of enhanced resource productivity and, as ...
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Sonicator dyeing of cotton with the leaves extract acer pectinatum wallich
Pigment & Resin Technology, 2008Co-Authors: Padma S Vankar, Rakhi Shanker, Shalini Dixit, Debajit Mahanta, S.c. TiwariAbstract:Purpose – The purpose of this paper is to evaluate the efficiency of ultrasonication on new natural dye obtained from leaves extract of Acer pectinatum Wallich using metal mordant for good cotton dyeing prospects.Design/methodology/approach – For effective natural dyeing with leaves extract of Acer pectinatum Wallich, both conventional and sonication methods of dyeing were carried out using metal mordants. The purpose of using sonication was for improvement of dye uptake, improved dye adherence and good wash and light fastnesses. Results show marked improvement by the chosen dyeing method.Findings – The superiority of Sonicator dyeing over conventional dyeing in terms of enhanced resource productivity and, as a result, reduced wastes establishes it as the best available technique in the natural dyeing industry. Use of Sonicator shows marked enhancement for cotton dyed fabric. Typical bath liquor to fabric ratio for conventional dyeing varies from 20:1 to 15:1 and for Sonicator dyeing from only 12:1 to 10:...
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Sonicator dyeing of natural polymers with symplocos spicata by metal chelation
Fibers and Polymers, 2008Co-Authors: Padma S Vankar, Rakhi Shanker, Dimpy Mahanta, Shalini Dixit, S.c. TiwariAbstract:Symplocos spicata (local name : Dom sheng) belonging to Family Symplococeae produces yellowish brown natural dye which has been used for dyeing textiles since ancient times by the Monpas tribe of Arunachal Pradesh. Symplocos spicata (Dom Sheng) was found in the Lumla area of Tawang district. Leaves of the plant are used by the Monpas and Tibetans for extraction of dye. Innovative Sonicator dyeing with S. spicata showed that pretreatment with 2-4 % metal mordant of the weight of the fabric is optimum showing very good fastness properties for dyed natural polymers such as cotton, wool, and silk. CIELab and K/S of the dyed fabrics were also evaluated. The superiority of Sonicator dyeing over conventional dyeing has been established through this study.
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Ecofriendly Sonicator dyeing of cotton with Rubia cordifolia Linn. using biomordant
Dyes and Pigments, 2008Co-Authors: Padma S Vankar, Rakhi Shanker, Debajit Mahanta, S.c. TiwariAbstract:Rubia cordifolia (Tamin, local name) produces anthraquinone reddish orange dyes in roots, stem and leaves, which has been used for dyeing textiles since ancient times. Commercial Sonicator dyeing with Rubia showed that pretreatment with biomordant, Eurya acuminata DC var euprista Karth. (Theaceae family) [local name, Nausankhee (Apatani tribe), Turku (Nyishi tribe) in 2%] shows very good fastness properties for dyed cotton using dry powder as 10% of the weight of the fabric is optimum. Use of biomordant replaces metal mordants making natural dyeing ecofriendly.
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Sonicator dyeing of modified cotton, wool and silk with Mahonia napaulensis DC. and identification of the colorant in Mahonia
Industrial Crops and Products, 2008Co-Authors: Padma S Vankar, Rakhi Shanker, Shalini Dixit, Debajit Mahanta, S.c. TiwariAbstract:Mahonia napaulensis DC. (local name—Taming) family Berberidaceae, produces natural dye from its stem which has been used for dyeing textiles by the Apatanis (a tribe of Arunachal Pradesh) since ancient times. Sonicator dyeing with Mahonia napaulensis showed marked improvement in dye uptake. It showed that pretreatment with metal mordant (2%, w/w with respect to the fabric) improved substantially the fastness properties for dyed cotton, silk fabrics and wool yarn. Five fractions were isolated from column chromatography of the stem extract of Mahonia. Attempts have been made to identify these fractions by matching the spectral data which indicated that they were from a well-known isoquinoline alkaloid family.
