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The roles of elevated temperature and carriers in the dyeing of polyester fibres using disperse dyes : Part 3 model of dye adsorption based on dye solubility / Stephen M. Burkinshaw in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 513-555 Titre : The roles of elevated temperature and carriers in the dyeing of polyester fibres using disperse dyes : Part 3 model of dye adsorption based on dye solubility Type de document : texte imprimé Auteurs : Stephen M. Burkinshaw, Auteur Année de publication : 2024 Article en page(s) : p. 513-555 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Adsorption Colorants dispersés Catégorie de colorants très peu solubles dans l'eau, utilisés à l'origine comme colorants pour l'acétate, et qui généralement sont appliqués sous forme de suspensions aqueuses de faible concentration.Les colorants dispersés sont largement utilisés dans la teinture de la plupart des fibres manufacturées, surtout le polyester. Fibres polyesters Hautes températures Solubilité Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : This review concerns the application of disperse dyes to poly(ethylene terephthalate) fibres using aqueous immersion dyeing processes and the roles of both elevated dyeing temperatures and carriers in the disperse dye/polyester fibre and disperse dye/carrier/polyester fibre dyeing systems, respectively. In this part of the paper, a mechanistic model of the disperse dye adsorption process is presented that is based on the role of dye solubility in disperse dye-PET fibre substantivity. It is shown that the dye solubility model of disperse dye adsorption, which can be articulated using a simple mathematical approach, is able to account for the reasons why elevated dyeing temperatures are utilised in HT dyeing processes, and also why dyeing accelerants enable dyeing to be achieved using lower temperatures of ~100°C. Note de contenu : - DYE SOLUBILITY MODEL OF DISPERSE DYE ADSORPTION : Role of dye solubility in disperse dye substantivity - Interstitial water in aqueous dyeing - Mathematical interpretation of dye solubility model - Mechanism of dye solubility model of disperse dye adsorption - Applicability to the aqueous disperse dye/PET fibre dyeing system - Applicability to the aqueous disperse dye/carrier/PET fibre dyeing system - Applicability to other aqueous disperse dye/fibre dyeing systems - RELEVANCE OF DYE SOLUBILITY MODEL OF DISPERSE DYE ADSORPTION TO COMMERCIAL DYEING PROCESSES FOR POLYESTER FIBRES : HT dyeing process - Carrier dyeing process - Dispersing agents - Reduction clearing - Fastness of disperse dyeings DOI : https://doi.org/10.1111/cote.12745 En ligne : https://drive.google.com/file/d/1o5eZ03A3mVPu7dbxdLgr3qQXowkmJjDO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41316 [article]

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Textile printing : An integrated view of processes, properties, and future prospects / Karine Thaise Rainert in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 556-570 Titre : Textile printing : An integrated view of processes, properties, and future prospects Type de document : texte imprimé Auteurs : Karine Thaise Rainert, Auteur ; Carlos Rafael Silva de oliveira, Auteur ; Brenno Henrique Siva Felipe, Auteur ; Heiderose Herpich, Auteur ; Rita de Cassia Siqueira Curto Valle, Auteur ; José Alexandre Borges Valle, Auteur Année de publication : 2024 Article en page(s) : p. 556-570 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Impression par sérigraphie rotative Impression sur étoffes Mélanges de fibres Pâtes d'impression Polyamide 66 Polyesters Qualité -- Contrôle Textiles et tissus -- Finition Index. décimale : 667.3 Teinture et impression des tissus Résumé : Textile printing processes consist of the localised application of colour on textile substrates to obtain well-defined designs and patterns. Currently, there are many textile printing techniques; however, the limitations and selectivity of these techniques still keep the printing method of rotary screen printing the most important and used among them. One of the advantages of rotary printing is its excellent application versatility, which can be used for any fabric and non-wovens, fibre, or mixtures, with high production speed, quality, colour fastness, and definition. However, due to its high complexity, rotary printing requires great technical knowledge. Rotary printing requires specific application care depending on the fabric structure, fibrous composition, grammage, and type of intended effect. Regardless of the technique used, printed articles need to ensure that the colour remains attached to the substrate, either by direct dye–fibre or indirect pigment–binder–fibre bonding, to resist the conditions of use, that is, light, abrasion, stretching, and washing. The rise in recent publications reflects the search for economic and sustainable textile printing alternatives, focusing on screen printing variables. Based on this, this review aimed to present a comprehensive guide containing all the care and essential technical information for processes based on rotary printing. Note de contenu : - PRINTING TECHNOLOGIES - ROTARY SCREEN-PRINTING – AN OVERVIEW : Direct printing for cellulosic substrates - Direct printing for polyester substrates - Direct printing for nylon substrates - Direct printing for blends - Printing paste components - Fixation and after-treatments - QUALITY CONTROL - FUTURE PERSPECTIVES DOI : https://doi.org/10.1111/cote.12746 En ligne : https://drive.google.com/file/d/1TcdxawRVydkvh7-NWGWnW9M4bymNc9p4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41317 [article]

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A stearns-Noechel colour prediction model reconstructed from gridded colour solid of nine primary colours and its application / Xianqiang Sun in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 571-584 Titre : A stearns-Noechel colour prediction model reconstructed from gridded colour solid of nine primary colours and its application Type de document : texte imprimé Auteurs : Xianqiang Sun, Auteur ; Yuan Xue, Auteur ; Jingli Xue, Auteur ; Guang Jin, Auteur Année de publication : 2024 Article en page(s) : p. 571-584 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Couleur Mélange de couleurs Modélisation prédictive Spectroscopie de réflectance Index. décimale : 535.6 Couleur Résumé : A full gamut colour solid model consisting of three lightness planes, 18 colour mixing units and 360 grid points is constructed from nine primary coloured fibres: red (R), yellow (Y), green (G), cyan (C), blue (B), magenta (M), dark grey (O1), medium grey (O2) and light grey (O3). Subsequently, the 213 coloured yarns and fabrics containing different lightness, hue and saturation were prepared according to the mixing ratio parameters in the colour solid. The Stearns–Noechel colour prediction algorithm, which predicts reflectance using coloured fibre mixing ratios, was improved and applied according to the requirements of colour prediction; and the Stearns–Noechel proportion prediction algorithm, which predicts coloured fibre mixing ratios by reflectance, was refined and employed in accordance with the demands of proportion prediction. Then, the 12 additional coloured fabrics were fabricated and their corresponding measurement data were used on the algorithm for validating its forecasting capabilities. The final experimental results reveal that the maximum colour difference for colour prediction is 5.5, the minimum is 1.7, and the average is 3.7; the maximum colour difference for proportion prediction is 3.3, the minimum is 0.3, and the average is 1.6. Therefore, this approach is promising to improve the colour reproduction issues encountered in the processing of three-channel computer numerical control (CNC) spinning. Note de contenu : - COLOUR SOLID BUILT BY NINE PRIMARY COLOURED FIBRES AND ITS SPINNING PATTERN : Construction of colour solid of colour mixing of nine primary coloured fibres - The principle of spinning coloured yarn using three-channel CNC spinning - STEARNS–NOECHEL COLOUR PREDICTION MODEL : Stearns–Noechel colour prediction model built from colour mixing pattern of full colour gamut - Prediction of reflectance at arbitrary points within the gridded colour mixing model - Colour prediction by full colour gamut mixing model and its colour difference - Prediction of mixing ratios of coloured fibres by colour values of full colour gamut mixing model - EXPERIMENTAL ANALYSIS : Preparation of yarn - Preparation of fabric - Acquisition of spectral reflectance DOI : https://doi.org/10.1111/cote.12724 En ligne : https://drive.google.com/file/d/1TnyeuL6ZBCDs7304Ai_EI4oDhzhivqBy/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41318 [article]

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Cigarette smoke uptake by different woven fabrics : Analysis of mechanical and colour properties / Mahmut Kayar in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 585-597 Titre : Cigarette smoke uptake by different woven fabrics : Analysis of mechanical and colour properties Type de document : texte imprimé Auteurs : Mahmut Kayar, Auteur ; Yalcin Boztoprak, Auteur ; Belma Gjergjizi Nallbani, Auteur Année de publication : 2024 Article en page(s) : p. 585-597 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption 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). Essais de résilience Fumée de cigarette Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Textiles et tissus -- Analyse Textiles et tissus -- Propriétés mécaniques Tissés Viscose Index. décimale : 667.3 Teinture et impression des tissus Résumé : Although the impact of smoking tobacco on human health is well understood, less is known about the effects of tobacco smoke on cotton, viscose and polyamide fabrics. In this study, tobacco smoke was applied to fabric samples to investigate the effects of tobacco smoke on their mechanical and colour properties. For this purpose, tobacco smoke was pumped into a mechanism consisting of a glass box, in which cotton, viscose and polyamide fabrics were placed in a suspended position. The fabric samples were treated with tobacco smoke for 1 or 2 months. The samples were evaluated in terms of tensile and tear strength, elongation at break, as well as pilling and abrasion resistance values. A colour measurement test was used to investigate the withering effect of tobacco smoke, and Fourier Transfer–Infrared analysis was performed to examine the chemical changes. The tensile strength values in the warp direction were 419.34, 404.62 and 421.78 N without treatment and after 1 and 2 months of tobacco smoke treatment, respectively, for the cotton woven fabric. Furthermore, for woven cotton fabric, the L* value decreased from 93.8 to 78.7 after being treated with tobacco smoke for 2 months. As a result of this study, it was determined that tobacco smoke has no effect on the tensile strength properties of fabrics, causes changes to pilling and abrasion resistance values, and adversely affects the colour properties of fabrics. Note de contenu : - EXPERIMENTAL : Materials - Treating fabrics with cigarette smoke - Mechanical tests - Colour measurement - FTIR analysis - RESULTS AND DISCUSSION : Mechanical properties - Colour properties - FTIR spectroscopy DOI : https://doi.org/10.1111/cote.12723 En ligne : https://drive.google.com/file/d/1DYOdc-ZyebrlHfeVt0plX5_47W_-gzHw/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41319 [article]

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Investigation of dyeing, antibacterial and antifungal properties of blended fabrics treated with plant-based dyestuffs and mordants as shoe materials / Saltanat Sabyrkhanova in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 598-611 Titre : Investigation of dyeing, antibacterial and antifungal properties of blended fabrics treated with plant-based dyestuffs and mordants as shoe materials Type de document : texte imprimé Auteurs : Saltanat Sabyrkhanova, Auteur ; Nilay Ork Efendioglu, Auteur ; Gulzinat Yeldiyar, Auteur ; Behzat Oral Bitlisli, Auteur Année de publication : 2024 Article en page(s) : p. 598-611 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens Antifongiques Colorants végétaux Colorimétrie Fibres textiles -- Propriétés tinctoriales Mélanges de fibres Mordants végétaux (chimie) Solidité de la couleur Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this research article, it is reported the preparation and characterisation of four types of blended cotton-polyester based textile materials in different dye ratios with four kinds of natural dyes of agro waste (walnut shell, onion peel) and wildflowers (tansy, Hypericum) with/without mordants as antibacterial and antifungal species for shoe materials. The dyed samples were spectrophotometrically measured and the results were obtained as colour strength (K/S) as well as CIELab values. As a result, dyed fabrics with natural dyes showed yellow, grey, orange and brown colours. With the help of a mordant, aluminium-potassium, the dyed fabrics obtained natural, not distorted shades of these colours, and with the addition of copper sulphate, they showed changing yellow to light green, orange to dark red, grey to a darker shade of grey and brown to a darker colour. The dyed samples were tested for colour fastness to circle rubbing and satisfactory results were found. The fabrics dyed only with natural dyes and treated with natural dye and mordants were evaluated for antibacterial and antifungal properties against Escherichia coli, Staphylococcus aureus, and Candida albicans. The results indicated that fabrics treated with these natural dyes and mordants had excellent antibacterial and antifungal activity. All natural dyes and mordants used in this study were the most effective and showed the maximum inhibition zone, indicating the best antimicrobial and antifungal activity against tested microbes. The results showed that all these natural dyes can provide some antibacterial and antifungal activity on mixed fabrics. Note de contenu : - Table 1 : Fabric types and compositions - Table 2 : Colorimetric parameters of CIELab measured for colour depth by Konica Minolta spectrophotometer - Table 3 : Colourfastness evaluations of the dyed samples with mordants and without mordants DOI : https://doi.org/10.1111/cote.12730 En ligne : https://drive.google.com/file/d/1iNhkFjwKke1wIJ-tfvJwD3HN2EmLDkmZ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41320 [article]

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Fluorescent whiteness measurement of textiles by multispectral imaging system / Pengpeng Yao in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 612-619 Titre : Fluorescent whiteness measurement of textiles by multispectral imaging system Type de document : texte imprimé Auteurs : Pengpeng Yao, Auteur ; Ho Chung Wu, Auteur ; Yixuan Li, Auteur ; Jingyi Xu, Auteur ; John H. Xin, Auteur Année de publication : 2024 Article en page(s) : p. 612-619 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale Blancheur Colorimétrie Imagerie (technique) Spectroscopie de réflectance Textiles et tissus -- Analyse Index. décimale : 667.3 Teinture et impression des tissus Résumé : Accurate whiteness measurement is critical across various industries including textiles, paper, and detergents. With the advent of fluorescent whitening agents (FWAs), the assessment of whiteness has evolved from simply measuring reflectance to determining the spectral radiance factor (SRF) of materials. While multispectral imaging (MSI) can effectively measure object reflectance and colour, its accuracy is compromised by FWAs that significantly augment spectral reflectance. Thus, reliable whiteness measurement requires the determination of both reflectance and SRF. This article presents the design of a specialised light source equipped with an ultraviolet (UV) filter to provide adjustable illumination within an integrating sphere system. By tuning the position of the UV filter, multispectral images are captured of a fabric under varying UV exposures. These images are subsequently processed and combined to reconstruct full-range visible spectrum information. This approach is shown to achieve high accuracy and spatial uniformity in quantifying the whiteness of textiles using MSI. Note de contenu : - FORMULATION OF MSI WHITENESS MEASUREMENT : Fluorescent image capturing - Light balance - Spatial uniformity for pure reflective material - Spatial uniformity for materials with FWAs - CIE colour equation - Whiteness formula - WHITENESS CALIBRATION METHOD : One-point-matching method - Numerical method - DEVICE SETUP - EXPERIMENTAL DETAILS AND RESULTS : Dataset - One-point-matching method and numerical method - Spatial uniformity - Results and analysis DOI : https://doi.org/10.1111/cote.12721 En ligne : https://drive.google.com/file/d/1KjYfaSIIgH7AJILMvWm40htkqJsyA2xW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41321 [article]

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Acryloyl esters of emodin for waterless dyeing and toxicological studies / Gabriel Rampazzo Magalhães in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 620-628 Titre : Acryloyl esters of emodin for waterless dyeing and toxicological studies Type de document : texte imprimé Auteurs : Gabriel Rampazzo Magalhães, Auteur ; Gabriely Fernanda Groto Militao, Auteur ; Natália Oliveira de Farias, Auteur ; Anjaina Fernandes de Albuquerque, Auteur ; Marina Tenório Botelho, Auteur ; Riikka Räisänen, Auteur ; Harold S. Freeman, Auteur ; Gisela de Aragão Umbuzeiro, Auteur Année de publication : 2024 Article en page(s) : p. 620-628 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse toxicologique Dioxyde de carbone Esters acryloyles d'émodine Fluides supercritiques Matériaux -- Modifications chimiques Mutagènes Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Traditional textile dyeing processes usually require large quantities of water and energy and generate wastewater that can be harmful to the environment. Dyeing in supercritical carbon dioxide (sc-CO2) media is promising in textile coloration due especially to it providing a waterless process and eliminating the need for an energy intensive drying step. The natural anthraquinone emodin showed promising results for dyeing different fibres through sc-CO2 process. However, emodin is mutagenic. The aim of this study was to develop non-mutagenic derivatives of emodin that can be applied to textiles using sc-CO2. Emodin structure was modified incorporating acryloyl groups, which are considered suitable for decreasing potential for DNA intercalation, and thus mutagenicity. The presence of acryloyl groups would also enable atmospheric plasma induced bonding with fibres. Molecular modelling studies showed that emodin derivatives became less planar with increasing number of attached acryloyl groups, making intercalation unlikely. The derivatives produced were tested to assess mutagenicity in vitro (Salmonella/microsome assay, TA1537, 10% S9) and in vivo (micronucleus test in hemocytes of aquatic crustacean). We found that emodin can be derivatised using acryloyl chlorides to give mono- and di-acrylate esters suitable for dyeing polyester fibres in sc-CO2. However, the new dyes presented mutagenicity for both in vitro and in vivo. Although the derivatives provided greenish-yellow alternatives to emodin for dyeing synthetic fibres, they do not appear to be viable alternatives from the point of view of preserving human and environmental health. Plasma bonding studies are underway. Note de contenu : - EXPERIMENTAL METHODS : Derivatisation of emodin - Dyeing procedure - In vitro mutagenicity – MPA test - In vivo mutagenicity – micronuclei test - RESULTS AND DISCUSSIONS : Derivatisation of emodin - Dyeing results - In vitro mutagenicity – MPA - In vivo mutagenicity – micronuclei test DOI : https://doi.org/10.1111/cote.12731 En ligne : https://drive.google.com/file/d/1F0gLFzT7inodHcDvNrqKS32lF_doZY4w/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41322 [article]

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Exploration on energy-saved dyeing method for polyimide fabrics with alkali treatment / Xiru Shao in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 629-636 Titre : Exploration on energy-saved dyeing method for polyimide fabrics with alkali treatment Type de document : texte imprimé Auteurs : Xiru Shao, Auteur ; Xin Chen, Auteur ; Chen Xi, Auteur ; Chenchen Zhan, Auteur ; Xiaojing LV, Auteur ; Shan Jiang, Auteur ; Tao Zhang, Auteur ; Genyang Cao, Auteur Année de publication : 2024 Article en page(s) : p. 629-636 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bases (chimie) Caractérisation Énergie -- Consommation Fibres textiles -- Propriétés mécaniques Fibres textiles -- Propriétés physiques Polyimides Stabilité thermique Teinture -- Fibres textiles synthétiques Traction (mécanique) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The difficulty of dyeing is a disturbing problem for the various application of polyimide fabrics. Alkali treatment has been widely used as a preliminary step before dyeing, denoted as a two-bath method. With more attention being paid to energy resources, this work aims to explore more economical and environmentally friendly dyeing technology, combining the alkali treatment and the dyeing process together, named a one-bath method. Surprisingly, the K/S value of the one-bath dyed fabric is much higher than that of the two-bath sample, in which the red colour value is enhanced by 59.9% for the one-bath sample. As for the effect of dyeing on the physical properties, the two-step method has been demonstrated to exert more severe damage on the fibre, with lower crystallinity and tensile strength. To explain such results, it is deduced that when alkali is added together with dyes, it can play a bridge role between the dyes and the fibre, anchoring the dyes wherever the alkali can permeate. Furthermore, 17.25 J of the energy is calculated to be saved for the dyeing of 60 g of fabric, which is very inspiring for large-scale application. Note de contenu : - MATERIALS AND METHODS : Materials - Dyeing - Characterisations - RESULTS AND DISCUSSION : Surface morphologies - Dyeing properties - Physical properties - Tensile properties - Thermal stability - The possible mechanism of the one-bath dyeing method - Energy consumption DOI : https://doi.org/10.1111/cote.12733 En ligne : https://drive.google.com/file/d/1I95JXGKchoJ8b_SHwGN9YoT3pJBDwOJr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41323 [article]

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Molecular imprinting of cellulose cotton fabric/silica materials with a colorimetric dithizone chelation for smartphone-based detection of Zn (II) ions in water samples / Lita Chheang in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 637-652 Titre : Molecular imprinting of cellulose cotton fabric/silica materials with a colorimetric dithizone chelation for smartphone-based detection of Zn (II) ions in water samples Type de document : texte imprimé Auteurs : Lita Chheang, Auteur ; Tongchai Sriwiriyarat, Auteur ; Sudtida Pliankarom Thanasupsin, Auteur ; Nisakorn Thongkon, Auteur Année de publication : 2024 Article en page(s) : p. 637-652 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Capteurs chimiques Caractérisation 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). Dithizone Eau -- Analyse Impression moléculaire Ions zinc Métaux lourds Polluants Produits chimiques -- Détection Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Tétraéthoxysilane Index. décimale : 677.4 Textiles artificiels Résumé : Molecularly imprinted materials based on imprinting dithizone-Zn (II) (DTZ-Zn (II)) complexes onto cotton fabric/silica, and the Color Grab application for the OPPO A54 smartphone, were proposed and applied for the first time to detect Zn (II) ions in water samples. The proposed materials were prepared by using cotton fabrics as cellulosic materials, tetraethoxysilane as silica sources and DTZ-Zn (II) as template molecules. The initial concentration of DTZ and Zn (II), the volume of tetraethoxysilane and the reaction time were optimised to obtain the maximum adsorption of the DTZ-Zn (II) complexes in the imprinted materials. The concentration of hydrochloric acid and the extraction time were optimised to obtain the maximum Zn (II) removal. The results found that 10 mL of a solution containing DTZ (0.20 mM) and Zn (II) (0.30 mM), 25 μL of tetraethoxysilane, with 10 minutes reaction time, exhibited the strongest binding of the template complexes. Zn (II) ions were selectively removed from the materials by using 0.1 M hydrochloric acid for 10 minutes. The morphology of the prepared materials was characterised by scanning electron microscopy–energy-dispersive X-ray spectroscopy and attenuated total reflectance–Fourier Transform-infrared spectroscopy. The smartphone measurement based the cotton fabric/silica materials exhibited linear relationship between saturation (%) and Zn (II) concentrations in the range of 0.1 to 1.0 mg/L, with limit of detection of 0.02 mg/L and limit of quantification of 0.06 mg/L. The proposed method was successfully applied to determine Zn (II) in real-water samples with the % recovery ranging from 98% to 115% and an acceptable relative standard deviation of less than 6 (n = 3). Note de contenu : - EXPERIMENTAL : Chemicals and materials - Analytical instruments - Methods - RESULTS AND DISCUSSION : Preparation of the CF/silica/DTZ for detection of Zn (II) ions - Characterisation of the imprinted materials using scanning electron microscopy–energy-dispersive X-ray spectroscopy and FTIR - Interference study - Reusability and stability of the CF/silica/DTZ - Detection of Zn (II) ions from an aqueous solution using the CF/silica/DTZ and smartphone detection - Detection of Zn (II) ions in water samples DOI : https://doi.org/10.1111/cote.12736 En ligne : https://drive.google.com/file/d/1JE50jcLKKTln2nwGMUVe68aJvVck368h/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41324 [article]

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Optimisation of laser fading process in denim trousers : An industrial scale approach / Riza Atav in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 653-661 Titre : Optimisation of laser fading process in denim trousers : An industrial scale approach Type de document : texte imprimé Auteurs : Riza Atav, Auteur ; Öner Gündüz, Auteur ; Sercan Yaz, Auteur ; Gizem Çakan, Auteur Année de publication : 2024 Article en page(s) : p. 653-661 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : 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). Décoloration Elasthanne Fibres polyesters Jeans lasers Index. décimale : 667.3 Teinture et impression des tissus Résumé : Colour fading with laser application has now become a well-known and frequently used process in the denim industry. However, in practice, high strength losses and even tears may occur in the trousers as a result of incorrect or excessive laser application. In this study, the effects of resolution (dpi) and pixel time (μs), which are the two main parameters of laser colour fading, and also the effects of two-passage laser treatments on colour fading and fabric strength were examined statistically and optimum conditions were determined. When the results of the studies are evaluated in general, it can be said that as the resolution (dpi) increases during the laser process, the colour fading effect increases, but when it is above the 31 dpi value, the strength loss increases excessively. As the second important parameter, the pixel time, increased, the colour fading effect increased. When the time exceeds 80 μs, there is a marginal increase in the strength loss value. Furthermore, it was observed that colour fading (%) values increase if laser process is applied in two passages, but in this case also the tear strength loss increases. It can be said that optimising the laser processing conditions in enterprises according to the product type (fibre content, weight, etc.) is a more accurate approach in terms of both the fading performance to be obtained and product quality. For 11.25 ounce trousers made of 95.3% cotton/3.4% polyester (T400)/1.3% elastane used in this study, it can be said that laser application could be made in two passages if necessary for obtaining high colour fading, however it should be noted that resolution and pixel time should not exceed 31 dpi and 80 μs, respectively. Provided that resolution and pixel time does not exceed 31 dpi and 80 μs, respectively, they can be changed depending on the degree of colour fading needed. DOI : https://doi.org/10.1111/cote.12737 En ligne : https://drive.google.com/file/d/143xWUz15SXrhKgMA3UWoIqpp4NoCaj0f/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41325 [article]

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