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A new colorimetric assay for antioxidant capacity and photostability / Elisabet Fernández-García in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 195-200 Titre : A new colorimetric assay for antioxidant capacity and photostability Type de document : texte imprimé Auteurs : Elisabet Fernández-García, Auteur ; Hayat Heluani-Gahete, Auteur ; Ralf E. Wellinger, Auteur Année de publication : 2016 Article en page(s) : p. 195-200 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antioxydants Bleu de leucométhylène Bleu de méthylène Colorimétrie Photostabilité Index. décimale : 667.3 Teinture et impression des tissus Résumé : The antioxidant capacity of cysteine, glutathione, N-acetylcysteine, and ascorbic acid to reduce Methylene Blue to colourless Leucomethylene Blue was analysed. Interestingly, transient exposure of Leucomethylene Blue to sunlight resulted in a reversible oxidation reaction and thus, provided a fast, easy, and simple quantitative assay to determine antioxidant capacity and photostability of biologically relevant antioxidants. Note de contenu : - MB to MBH2 reduction capacity correlates with antioxidant redox potential - Determination of antioxidant photostability by MBH2 oxidation upon sunlight exposure DOI : 10.1111/cote.12210 En ligne : https://drive.google.com/file/d/1s2D0yhapwm3hhKKCAZQuoqc9OuyAB99C/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26350 [article]

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Derivative cathodic stripping voltammetry in the simultaneous determination of three textile dyes in aqueous solutions / Lídia B Santos in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 201-207 Titre : Derivative cathodic stripping voltammetry in the simultaneous determination of three textile dyes in aqueous solutions Type de document : texte imprimé Auteurs : Lídia B Santos, Auteur ; Alexandre T. Paulino, Auteur ; Fernando S. Domingues, Auteur ; Thábata K. S. F. Souza, Auteur ; Vitor C. Almeida, Auteur ; Nilson E. Souza, Auteur ; Juliana C. G. Moraes, Auteur Année de publication : 2016 Article en page(s) : p. 201-207 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Solutions aqueuses (chimie) Teinture -- Fibres textiles Voltampérométrie Index. décimale : 667.3 Teinture et impression des tissus Résumé : Reactive dyes, such as Procion Yellow, Procion Red, and Procion Blue, were simultaneously determined in aqueous ternary solutions using derivative cathodic stripping voltammetry following adsorption on a hanging mercury drop electrode. An electrochemical cell containing Britton–Robinson buffer solution at pH 8 was used as the supporting electrolyte. The following experimental conditions were established: ?0.100 V deposition potential, 80 s deposition time, 50 mV pulse amplitude, 50 mV s?1 scan rate, and 0.40 mm2 maximum mercury drop size. A linear response was observed over the 0.630 × 10?3 to 1.050, 1.441 × 10?3 to 1.572, and 0.198 to 1.570 mg l?1 ranges for Procion Yellow, Procion Red, and Procion Blue respectively. The detection limits were 0.210 × 10?3, 0.480 × 10?3, and 0.066 mg l?1 respectively, with a relative standard deviation (n = 3) of 1.22%. The accuracy of the method was evaluated by derivative spectrophotometry, certifying the results as a function of proximity. All results were similar, indicating that derivative cathodic stripping voltammetry may be efficiently applied for the simultaneous determination of textile dyes in aqueous ternary solutions. Note de contenu : - EXPERIMENTAL : Apparatus - Solutions - Voltammetric measurements - Electrochemical calibration method - Dyebath preparation - Statistical analysis and process efficiency - RESULTS AND DISCUSSION : Experimental conditions for voltammetric measurements - Electrochemical reduction mechanisms for Procion yellow, Procion red, and Procion blue - Derivative voltammetry for ternary mixture of dyes - Accuracy, validation, and statistical figures of merit - Efficiency of dyeing process DOI : 10.1111/cote.12209 En ligne : https://drive.google.com/file/d/1mHDnWNd2oRu4Vg1tdWRJKBGRxL2jCNDl/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26351 [article]

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Antioxidant-assisted coloration of wool with xanthophylls extracted from corn distiller' dry grain / Luyi Chen in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 208-216 Titre : Antioxidant-assisted coloration of wool with xanthophylls extracted from corn distiller' dry grain Type de document : texte imprimé Auteurs : Luyi Chen, Auteur ; Qian Duan, Auteur ; Jiangang Chen, Auteur ; Yiqi Yang, Auteur ; Bijia Wang, Auteur Année de publication : 2016 Article en page(s) : p. 208-216 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antioxydants Colorants végétaux Laine Teinture -- Fibres textiles Xanthophylles Les xanthophylles sont des molécules de couleur jaune dérivées des carotènes, par ajout d'atomes d'oxygène (fonctions alcool, cétone, époxy, …). Elles appartiennent à la famille des caroténoïdes. On les rencontre dans les chloroplastes ou les chromoplastes des cellules végétales, notamment dans les pétales de certaines fleurs de couleur jaune, orange ou rouge, et chez les algues, par exemple les algues brunes (Phéophycées), où elles masquent la chlorophylle. Index. décimale : 667.3 Teinture et impression des tissus Résumé : Xanthophylls extracted from corn distillers’ dry grain were successfully applied to dye wool fabrics. As a readily available and cost-effective grain processing byproduct, corn distillers’ dry grain contains appreciable amounts of isolable xanthophyll colourants, which can potentially be used in textile coloration. However, the application of xanthophylls as textile colourants has been limited, possibly owing to their hydrophobic nature and lack of stability at higher temperatures. In the present work, dyeing of wool fabrics with xanthophyll dyes was performed in the presence of a solubilising agent (diglyme) and an antioxidant (butylated hydroxytoluene). Dyeing conditions were modelled and optimised by the one-factor-at-a-time method and response surface methodology. Depth of shade of the wool fabrics dyed with 0.33 g l?1 of xanthophylls could be as high as 10.9 ± 0.5, while the colour fastness to laundering and crocking was better than grade 4. The prominent effect of butylated hydroxytoluene on depth of shade (K/S) was further studied using functionally and structurally related model compounds. The K/S-enhancing ability of butylated hydroxytoluene was found to be a synergistic result of its antioxidising and complexing abilities. Lab-extracted xanthophylls of various purities were applied to wool fabrics using the optimised dyeing and aftertreatment conditions. Depth of shade but not colour fastness was significantly affected by the impurities in xanthophylls extracted from corn distillers’ dry grain. The strategy developed by this work not only extends the scope of xanthophyll application into textile coloration but also could be used for other hydrophobic and unstable natural colourants. Note de contenu : - EXPERIMENTAL : Materials - Dyeing procedures - Aftertreatment measurements - Extraction of xanthophylls from corn distillers' dry grain - RESULTS AND DISCUSSION : Optimisation of dyeing by the one-factor-at-a-time method - Optimisation of dyeing by response surface methodology - Role of butylated hydroxytoluene in dyeing property enhancement - Dyeing of wool fabrics using xanthophylls extracted from corn distillers' dry grain DOI : 10.1111/cote.12206 En ligne : https://drive.google.com/file/d/1F-KQp4-Gm6sKeKseu7S15gqn6un0UIy4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26352 [article]

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Solubilisation study of water-insoluble dye in cationic single/dimeric surfactant micelles : effect of headgroup, non-polar tail, and spacer chain in aqueous and salt solution / Shailesh Padasala in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 208-216 Titre : Solubilisation study of water-insoluble dye in cationic single/dimeric surfactant micelles : effect of headgroup, non-polar tail, and spacer chain in aqueous and salt solution Type de document : texte imprimé Auteurs : Shailesh Padasala, Auteur ; Ketan Kuperkar, Auteur ; Pratap Bahadur, Auteur Année de publication : 2016 Article en page(s) : p. 208-216 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Solubilité Colorants azoïques Concentration micellaire critique Hydrophobie Solutions aqueuses (chimie) Surfactants Index. décimale : 667.3 Teinture et impression des tissus Résumé : The solubilisation of hydrophobic azo dye Orange OT in aqueous/salt solution in several cationic surfactant micelles was studied using UV-vis spectroscopy. An attempt was made to correlate dye solubilising strength with adsorption/micellar characteristics. In our experiments we determined the change in solubilisation of hydrophobic dye when added to an aqueous solution of oppositely charged quaternary-salt-based cationic surfactants (conventional and gemini) and remarked on the probable location of the solubilised dye in the surfactant micelle. Results highlight the onset of dye solubilisation around the critical micelle concentration of each surfactant, which is influenced by the non-polar tail, spacer, and polar headgroup, while no dye could be solubilised at concentrations below the critical micelle concentration. Orange OT solubilised almost linearly with increase in surfactant concentration at and above the critical micelle concentration. The change in colour intensity of the dye (darker below the critical micelle concentration, lighter at and above the critical micelle concentration) could be attributed to dye–surfactant interactions. Further dye solubilisation was observed in the presence of salt. Note de contenu : - EXPERIMENTAL : Materials - Instrumentation - Method - RESULTS AND DISCUSSION : Effect of tail chain length and headgroup - Effect of salt - Effect of spacer chain length - Location of the solubilised dye in surfactant micelle DOI : 10.1111/cote.12208 En ligne : https://drive.google.com/file/d/19vsxn9TzSiIuqm_V9bIt_guHNHUfhyff/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26353 [article]

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A method for dyeing cotton fabric with anthocyanin dyes extracted from mulberry (Morus rubra) fruits / Huayin Wang in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 222-231 Titre : A method for dyeing cotton fabric with anthocyanin dyes extracted from mulberry (Morus rubra) fruits Type de document : texte imprimé Auteurs : Huayin Wang, Auteur ; Zhirong Tang, Auteur ; Wenlong Zhou, Auteur Année de publication : 2016 Article en page(s) : p. 222-231 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anthocyanes Colorants végétaux Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Evaluation Extraction (chimie) Fibres végétales Fibres végétales -- Propriétés mécaniques Murier et constituants Succinique, Acide L'acide succinique est un diacide carboxylique aliphatique, dénommé également acide butane-1,4-dioïque et de formule semi-développée HOOC–CH2–CH2–COOH. Il est présent dans tous les organismes vivants et intervient dans le métabolisme cellulaire, en particulier dans le métabolisme des lipides entre l'acide cétoglutarique et l'acide fumarique lors du cycle de Krebs dans la mitochondrie. Teinture -- Fibres textiles vision des couleurs Index. décimale : 667.3 Teinture et impression des tissus Résumé : For the first time, the natural anthocyanin dyes (mainly consisting of cyanidine 3-glycoside) extracted from mulberry (Morus rubra) fruits has been successfully used to dye cotton fabric, with a dyeing property performance good enough for potential commercial applications. In this study, succinic acid was firstly incorporated into cotton fabrics by esterification to the hydroxyl groups of cellulose, forming an anionic site for the dyes. The performance of the modified material was characterised by Fourier transform infrared spectroscopy and tensile strength. Results showed that the tensile strength of cotton fabrics was mostly retained after modification. The anthocyanin extracts from mulberry fruits were used to study the dyeability of the control and modified cotton fabrics. Red and deep purple (aubergine) are two main shades of cotton fabrics dyed with mulberry fruit extracts. Most importantly, aubergine shade is rare in cotton fabrics dyed with natural dyes. Modification with succinic acid clearly increased the colour strength of the dyed cotton fabric. The colour strength of dyed cotton fabric was improved from 2.7 to 5.3 in the case of dyeing without mordants, and from 3.2 to 6.9 in the case of dyeing with tin mordanting. Meanwhile, the colour fastness was improved by 0.5–2 grades with increasing succinic acid concentration in the finish solution. The colour fastness to perspiration, crocking, light, and washing of fabric dyed with simultaneous tin mordanting and modified with 30 g l?1 of succinic acid was found to be acceptable, with a grey scale grade of at least 3. As for home laundering, neutral soapy solution was more acceptable than alkaline soapy solution. Note de contenu : - EXPERIMENTAL : Materials and reagents - Extraction of mulberry dyes - High-performance liquid chromatography/tandem mass spectrometry - Modification of cotton fabrics - Dyeing - Fourier transform infrared spectral analysis - Tensile strength - Colour evaluation - Colour durability - RESULTS AND DISCUSSION : Mechanism - Fourier transform infrared analysis - Tensile strength - Main anthocyanins of fruit extracts - Dyeing DOI : 10.1111/cote.12212 En ligne : https://drive.google.com/file/d/1NJBjgd8Y5Ovy5P5aAo_e0wtJS24jv9dQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26354 [article]

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Influence of liquor ratio and amount of dyestuff in producing ultradeep black dyeing using mercerised and cationised cotton / Sha Fu in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 232-237 Titre : Influence of liquor ratio and amount of dyestuff in producing ultradeep black dyeing using mercerised and cationised cotton Type de document : texte imprimé Auteurs : Sha Fu, Auteur ; Matthew Farrell, Auteur ; Peter Hauser, Auteur ; Mary Ankeny, Auteur Année de publication : 2016 Article en page(s) : p. 232-237 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cationisation Colorants -- Absorption Colorants acides Colorants réactifs Colorimétrie Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Eau -- Consommation -- Réduction Essais (technologie) Fibres végétales Noir (couleur) Solidité de la couleur Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Cationised cotton allows the dyeing of cotton fabrics without salt and up to 100% anionic dye utilisation. The employment of cationised cotton in the dyeing of high depths of shades with reactive dyes holds marked potential for sustainable improvements through less dye consumption, decreased water usage, and zero salt utilisation, all while obtaining shade depths darker than possible with conventional reactive dyeings. This work builds upon previous work in obtaining ultradeep dyeings of cotton utilising cationised and mercerised cotton by investigating the effects of liquor ratio in dyeing and amount of dye applied. Surprisingly, for mercerised only cotton fabric, it was found that nearly equivalent depths of shade, as indicated by L*, were obtained, irrespective of the liquor ratio and the amount of CI Reactive Black 5 applied from 7% to 10% owf. However, the strengths of the dyeings, indicated by the K/S sum, show slight increases with increasing amounts of dye, but not when the liquor ratio is lowered. Similarly, for mercerised-cationised cotton, the liquor ratio had a negligible effect on the depth of shade obtained, but increasing the amount of CI Reactive Black 5 resulted in an increase in shade depth and colour strength. Very deep shades with high colour strength were obtained with mercerised-cationised cotton that were not obtainable with uncationised cotton, even at a very low liquor ratio and with a drastic increase in the amount of CI Reactive Black 5. Note de contenu : - EXPERIMENTAL : Materials - Application of cationic reagent - Dyeing - Colour measurement - Evaluation of dye uptake - Colour fastness tests - RESULTS AND DISCUSSION : Dyeing of mercerised and mercerised-cationised cotton - Colorimetric values and colour strength - Dye uptake - Colour fastness properties DOI : 10.1111/cote.12216 En ligne : https://drive.google.com/file/d/11dY5arwofo31oRA6mFpgKihRoDM2fFnU/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26355 [article]

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Factors affecting the measurement of photochromic lens performance / Liu Ouyang in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 238-248 Titre : Factors affecting the measurement of photochromic lens performance Type de document : texte imprimé Auteurs : Liu Ouyang, Auteur ; Hongliang Huang, Auteur ; Yong Tian, Auteur ; Wei Peng, Auteur ; Huanbao Sun, Auteur ; Weizhong Jiang, Auteur Année de publication : 2016 Article en page(s) : p. 238-248 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Lentilles (optique) Mesure Photochromisme Index. décimale : 535.33 Instruments d'optique : classer à 681.4 Résumé : The principles, characteristics, and measurement methodology of photochromism of plastic ophthalmic lenses are briefly introduced and discussed. The factors influencing measurement variation and accuracy, including the preconditioning process, measurement device, and procedure, were investigated on ophthalmic photochromic lenses covering both photocasting and photocoating lens technologies. By design of experiment, factors affecting the measurements were studied using a photochromic measurement rig with reference to ISO 8980-3 requirements. Experimental results prove the necessity for a lens preconditioning process prior to measurement. The excitation light source in the photochromic measurement rig has the greatest impact on measurement variation from the device perspective, while lens temperature is the key environmental factor. On the basis of the investigation, recommendations are made for reducing measurement variations and improving result accuracy. Note de contenu : - EXPERIMENTAL : Materials - Measurements - Experiments - RESULTS AND DISCUSSION : PMR stability and lens performance uniformity - Lens geometry - Lens preconditioning - Measurements conditions - Other factors DOI : 10.1111/cote.12214 En ligne : https://drive.google.com/file/d/1CA-86eJTWzKcH4C8Yuj1a8eTPmU1VxXU/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26356 [article]

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Improving the colour fastness of dyed nylon-6 fabric by graft copolymerisation and curing of acrylic acid / Farzad Mohaddes in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 249-254 Titre : Improving the colour fastness of dyed nylon-6 fabric by graft copolymerisation and curing of acrylic acid Type de document : texte imprimé Auteurs : Farzad Mohaddes, Auteur ; Stanley Fergusson, Auteur ; Lijing Wang, Auteur Année de publication : 2016 Article en page(s) : p. 249-254 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : acrylique, Acide L'acide acrylique ou acide acroléïque ou acide prop-2-énoïque est un composé organique de formule brute C3H4O2 et de formule semi-développée CH2=CHCOOH. C'est un acide carboxylique et un alcène vinylique, et se présente comme un liquide incolore à l'odeur âcre. L'acide acrylique et ses esters, les acrylates, sont utilisés dans la fabrication de matières plastiques, dans les peintures acryliques et dans divers autres polyacryliques qui ont de multiples usages. Colorants acides Colorimétrie Copolymères greffés Polyamide 66 Solidité de la couleur Teinture -- Fibres textiles synthétiques Textiles et tissus -- Propriétés mécaniques Index. décimale : 667.3 Teinture et impression des tissus Résumé : The influence of grafting and grafting–curing of acrylic acid on the colour fastness of nylon-6 fabric dyed with an acid dye of low wash fastness was investigated. The variables involved in grafting were initially optimised for pristine nylon-6 fabric prior to grafting the same monomer onto the dyed fabrics. The highest graft yield achieved for the pristine and dyed nylon-6 fabrics was 44 and 14% respectively. Grey scale testing and colorimetric analysis revealed that the highest colour fastness and the smallest drop in colour strength belonged to the dyed–grafted–cured nylon-6 fabric. The colour components were measured, and the total colour difference of each sample after five washing cycles was computed. The specific colour difference showed that the implementation of either grafting or grafting–curing processes will alter the reference colour of the dyed fabric. The tensile strength of the grafted and grafted–cured fabrics was respectively 2.7 and 6.3% lower than that of dyed nylon-6. Note de contenu : - EXPERIMENTAL : Materials - Pretreatment of pristing nylon-6 fabric - Dyeing procedure - Optimisation of the grafting process - Graft copolymerisation of acrylic acid on dyed nylon-6 fabric - Curing procedure - Washing process - Colour measurements - Colour wash fastness - Determination of tensile strength - RESULTS AND DISCUSSION : Effect of pretreatment of pristing nylon-6 fabric on the graft yield - Effect of cupric ion concentration - Effect of monomer concentration - Effect of potassium persulfate concentration - Effect of time and time and temperature - Fourier transform infrared analysis - Graft copolymerisation of dyed nylon-6 fabric - Colorimetric evaluation - Colour fastness - Determination of tensile strength DOI : 10.1111/cote.12211 En ligne : https://drive.google.com/file/d/1sEe52YP9xur56xLv_mcowbiwAPr_1UR3/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26357 [article]

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Aloe vera gel : a new thickening agent for pigment printing / Mohammad Tajul Islam in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 255-264 Titre : Aloe vera gel : a new thickening agent for pigment printing Type de document : texte imprimé Auteurs : Mohammad Tajul Islam, Auteur ; Shahadat Hossain Khan, Auteur ; Md Mahadi Hasan, Auteur Année de publication : 2016 Article en page(s) : p. 255-264 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alginate de sodium L'alginate de sodium ou polymannuronate sodique, de formule NaC6H7O6 est un additif alimentaire (E401) utilisé dans les boissons, constitué d’alginate et de sodium. Il se présente sous forme de poudre blanche à blanc crème, inodore et sans saveur, très soluble dans l'eau. C'est une longue molécule extraite d'algues brunes, constituée d'unités de glucides reliées ensemble pour former une chaîne. Aloe vera et constituants Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Epaississants Fixateurs (chimie) Impression sur étoffes Liants Matériaux -- Cuisson Séchage Sulfate d'ammonium Index. décimale : 667.3 Teinture et impression des tissus Résumé : An attempt was made to print cotton fabric with pigments using a new thickening agent based on Aloe vera gel in combination with sodium alginate. The results were compared with the standard conventional printing recipe containing synthetic thickener, and a favourable effect of Aloe vera introduction was achieved. The results show that the properties of the printed fabric (sharpness, colour yield, overall fastness properties, softness, and water vapour transmission) are dependent on the percentage of Aloe vera gel in the thickener combination, the concentration of printing auxiliaries, and the curing conditions. Optimal printing properties were achieved by using a printing paste containing 80% Aloe vera/20% sodium alginate (700 g kg?1), pigment (50 g kg?1), binder (145 g kg?1), fixer (10 g kg?1), and ammonium sulfate (5 g kg?1), followed by drying at 85 °C for 5 min and curing at 150 °C for 3 min. The sample printed with the new recipe showed superior rubbing fastness and handle properties, with a slightly lower colour yield, when compared with the sample printed with synthetic thickener. Finally, economic issues arising from synthetic thickener substitution are highlighted. Note de contenu : - Aloe vera percentage in thickener combination - Ammonium sulfate concentration - Concentration of binder - Curing time - Curing temperature - Comparison between samples printes from Aloe vera gel and synthetic thickener DOI : 10.1111/cote.12215 En ligne : https://drive.google.com/file/d/1u8k2bY3hQofMJ7Sy3v2virP1GCm0JOMX/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26358 [article]

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