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COLORATION TECHNOLOGY / Society of dyers and colourists . Vol. 137, N° 3Mention de date : 06/2021Paru le : 15/06/2021 |
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Ajouter le résultat dans votre panierEffect of silica based sols on the optical properties and colour fastness of synthetic indigo dyed denim fabrics / Sabiha Sezgin Bozok in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
[article]
Titre : Effect of silica based sols on the optical properties and colour fastness of synthetic indigo dyed denim fabrics Type de document : texte imprimé Auteurs : Sabiha Sezgin Bozok, Auteur ; Ramazan Tugrul Ogulata, Auteur Année de publication : 2021 Article en page(s) : p. 209-216 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : 3-Glycidoxypropyltrimethoxysilane
Colorimétrie
Enrobage (technologie)
Essais (technologie)
Indigo
Jeans
Orthosilicate de tétraéthyleL'orthosilicate de tétraéthyle (TEOS) est un composé chimique de formule Si(OCH2CH3)4 ou plus simplement Si(OEt)4; l'abréviation TEOS (pour tetraethylorthosilicate) est généralement utilisée dans l'industrie du sol-gel, où il est intensivement étudié. La majorité des études en sol-gel pour des sols de silices ont utilisé ce produit comme précurseur.
Le TEOS est généralement produit par alcoolyse du tétrachlorure de silicium SiCl4 dans de l'éthanol CH3CH2OH :
SiCl4 + 4 CH3CH2OH → Si(OCH2CH3)4 + 4 HCl.
Il est utilisé pour la réticulation de silicones et possède certaines applications comme précurseur du dioxyde de silicium SiO2 dans l'industrie des semi-conducteurs6 dans le cadre d'une réaction sol-gel. La propriété remarquable du TEOS est en effet de former du SiO2 par simple hydrolyse en libérant de l'éthanol CH3CH2OH :
Si(OCH2CH3)4 + 2 H2O → SiO2 + 4 CH3CH2OH.
Résistance à l'abrasion
Résistance au lavage
SiliceLa 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.
Sol-gel, Procédé
Solidité de la couleur
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The colour of denim fabric, which has a large share in the textile market, is an important parameter together with comfort properties during usage. While some users prefer the colour of denim fabrics to have different colours as they use them, others want to be provided with colour stability of the fabrics during use. In this study, the effect of a sol-gel technique on indigo dyed denim fabrics was investigated. The aim was to reduce the colour change that occurs in denim fabrics as a result of external factors by using silica-based coatings. The sols were prepared by using TEOS (tetraethylortosilicate) and different volumes of GPTS ((3-glycidyloxypropyl)trimethoxysilane) as precursors in acidic and alkaline conditions. Synthetic indigo dyed cotton denim fabrics were treated with the sols by applying the pad-dry-cure method. It was determined that the colour strength of the treated samples increased and the fabrics treated with the sols prepared in alkaline condition became darker compared to the sols in acidic condition. It is seen that the use of crosslinkers while preparing the sol could improve the rubbing and washing fastness of commercial denim samples. Note de contenu : - MATERIALS AND METHODS : Preparation of the sols and coating process - Testing methods
- RESULTS AND DISCUSSION : SEM analysis - Colour measurements - Rubbing fastness - Wash fastness
- Table 1 : Content of solutions and the sample codes
- Table 2 : Colour difference values of the treated samples
- Table 3 : Rubbing fastness of the samples
- Table 4 : Washing fastness of the samples according to the standardDOI : https://doi.org/10.1111/cote.12521 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12521 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36087
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Code-barres Cote Support Localisation Section Disponibilité 22845 - Périodique Bibliothèque principale Documentaires Disponible Performance enhancement of one-bath pigment coloration and finishing process using eco-friendly crosslinkers / Muhammad Mohsin in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
[article]
Titre : Performance enhancement of one-bath pigment coloration and finishing process using eco-friendly crosslinkers Type de document : texte imprimé Auteurs : Muhammad Mohsin, Auteur ; Shaheen Sardar, Auteur ; Komal Iftikhar, Auteur Année de publication : 2021 Article en page(s) : p. 217-225 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens
Bleu (couleur)
CotonLe 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).
Imperméabilisation
Jaune
Oléofugation
Pigments
Résistance à l'abrasion
Résistance à la transpiration
Résistance au lavage
Résistance aux frottements humides
Résistance chimique
Réticulants
Rouge (couleur)
Teinture -- Fibres textiles
Textiles et tissus -- Propriétés mécaniquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The one-bath pigment coloration and finishing process decreases the consumptions related to the energy, water, chemicals, labour, and production time as compared to the conventional two-bath application. Conventionally, pigment coloration uses binders, such as acrylic, for the attachment of the pigment onto the fabric. Then, the finishes are applied in a separate step. One-bath pigment coloration and finishing can solve this problem but the compatibility among the pigments, crosslinkers, and fabrics is critical and difficult to achieve. In addition, the performance of the fabric treated with one-bath application should match the performance of the fabric treated with the conventional two-bath coloration and finishing. To address such challenges, this article studies the performance of the one-bath pigment coloration and finishing using three primary colours, five crosslinkers, and an oil and water repellent finish in the pad-dry-cure process. The results show that all the formulas with the crosslinkers are comparable with each other as well as associated reference samples coloured with conventional acrylic binder. Nevertheless, the bio-based crosslinkers, citric acid and succinic acid, are more compatible and sustainable for the one-bath pigment coloration and finishing. The fastness properties, shrinkage, crease recovery angle, and oil and water repellency were also improved due to the one bath pigment coloration and finishing. Note de contenu : - EXPERIMENTAL : Materials and methods
- RESULTS AND DISCUSSION : Shade depth - Dry and wet rubbing fastness - Washing fastness - Perspiration fastness - Crease recovery angle - Shrinkage - Oil and water repellency - Flexural rigidity and tensile strength retention (%) - Soil release - Antimicrobial
- Table 1 : Pigment coloration and finishing alternative formulas
- Table 2 : Comparison of coloration results amongst untreated, dyed and one-bath coloration and finishing samples
- Table 3 : Crease recovery performance of the one-bath coloured and finished samples
- Table 4 : Shrinkage performance of the one-bath coloured and finished samples
- Table 5 : Oil repellency performance of the one-bath coloured and finished samples
- Table 6 : Flexural rigidity and tensile strength retention (%) of the one-bath coloured and finished samples
- Table 7 : Soil release of the one-bath coloured and finished samples
- Table 8 : Antimicrobial performance of the one-bath coloured and finished samplesDOI : https://doi.org/10.1111/cote.12522 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12522 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36088
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Code-barres Cote Support Localisation Section Disponibilité 22845 - Périodique Bibliothèque principale Documentaires Disponible Effects of age on the structure ad bleaching/dyeing behaviour of hair / Haona Wang in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
[article]
Titre : Effects of age on the structure ad bleaching/dyeing behaviour of hair Type de document : texte imprimé Auteurs : Haona Wang, Auteur ; Li Kong, Auteur ; Honghui Xia, Auteur ; Jie Min Huang, Auteur ; Bo Deng, Auteur ; Heng Pan, Auteur Année de publication : 2021 Article en page(s) : p. 226-233 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Âge
Caractérisation
Cheveux -- analyse
Cheveux -- Propriétés mécaniques
Cheveux -- Teinture
Décoloration
Etudes comparativesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : The structure and bleaching/dyeing behaviour of hair sampled from people of various ages were investigated to provide guidance for wig-making. Hair surface and cross-sectional morphology were investigated by scanning electron microscopy, whereas the number density and size of melanin granules were evaluated by transmission electron microscopy. The suitability of hair for dyeing was determined by the trade-off between the fracture strength and lightness of bleached samples. Hair collected from 26-year-olds showed the highest number density and the lowest size of melanin granules, thus featuring the lowest mechanical strength reduction and the highest lightness increase after bleaching. The optimal bleaching conditions for such hair were identified as bleaching time = 80 minutes, hydrogen peroxide (H2O2) concentration = 60 mL/L, and bleaching temperature = 75°C. Considering its resilience to damage and favourable dyeing behaviour, hair sampled from 26-year-olds was concluded to be most suitable for wig-making. Thus, the present research provides guidance for the selection of raw materials for wig-making. Note de contenu : - EXPERIMENTAL : Materials - Rinsing of human hairs - Pretreatment and bleaching of human hairs - Dyeing of human hairs - Hair characterisation
- RESULTS AND DISCUSSION : Effects of age on hair surface and cross-sectional morphology - Effects of hair age on the number density and average area of melanin granules - Effects of bleaching on hair fracture strength, lightness, and regularity - Optimal bleaching conditions for 26-year-old hair - Comparison of control, bleached, and dyed 26-year-old hairDOI : https://doi.org/10.1111/cote.12525 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12525 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36089
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Code-barres Cote Support Localisation Section Disponibilité 22845 - Périodique Bibliothèque principale Documentaires Disponible Efficacy of parthenium hysterophorus waste biomass compared with activated charcoal for the removal of CI Reactive Red 239 textile dye from wastewater / Shreyas Bapat in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
[article]
Titre : Efficacy of parthenium hysterophorus waste biomass compared with activated charcoal for the removal of CI Reactive Red 239 textile dye from wastewater Type de document : texte imprimé Auteurs : Shreyas Bapat, Auteur ; Dipika Jaspal, Auteur ; Arti Malviya, Auteur Année de publication : 2021 Article en page(s) : p. 234-250 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Caractérisation
Colorants -- Elimination
Colorants réactifs -- Biodégradation
Déchets végétaux -- Recyclage
Eaux usées -- Epuration
Isotherme d'adsorption
ThermodynamiqueIndex. décimale : 667.2 Colorants et pigments Résumé : In the quest to find an eco-friendly, cost-effective and efficient alternative to expensive and non-biodegradable activated charcoal (AC), in the current study the potential of a weed, parthenium hysterophorus (PH), has been explored as a bio-adsorbent for purification of textile wastewater. Root, stem and leaves of PH weed have been used as bio-adsorbents in raw and surface-treated forms and compared with AC for removal of toxic textile dye CI Reactive Red 239 (Remazol Brilliant Red 3BS [RBR 3BS]) from wastewater. The surface treatment carried out using QAS (N-Cetyl-N,N,N–trimethylammonium bromide) in the current study is a novel way to enhance the dye adsorption capacity of raw adsorbents of PH. Characterisation tools like Fourier Transform–infrared spectroscopy, scanning electron microscopy, elemental analysis and potential of zero charge have been used to confirm the surface treatment. The impact of various process variables like pH, dosage of adsorbent, contact time, solution temperature and dye concentration have been studied. Isothermal, kinetic and thermodynamics modelling for adsorption data have been thoroughly investigated to ascertain the mechanism of adsorption. Statistical error functions like root mean square error, chi-square test, sum of absolute error and normalized standard deviation (NSD) have been used to validate the adsorption data. Results revealed that novel surface treatment significantly improved the dye adsorption capacity of raw PH adsorbents (ca. 15-16 times). Of all the weed bio-adsorbents, surface-treated PH stem showed the highest dye adsorption capacity (105 mg/g), which was 10-folds greater than commercial grade AC (10.4 mg/g at 27°C). For both adsorbents, surface-treated PH stem and AC, adsorption followed pseudo-second order kinetics, and the Langmuir isotherm was the best fit with film diffusion as a rate-controlling step. Thermodynamic parameters infer the spontaneous and exothermic nature of adsorption. Therefore, in the current study, surface-treated PH stem bio-adsorbent has been revealed as a superior alternative to AC for the removal of RBR 3BS dye from wastewater, opening a new gateway to the utilisation of waste weeds for the purpose of wastewater treatment. Note de contenu : - MATERIALS AND METHODS : Preparation of raw adsorbent material - Adsorbate - Initial experiments - Activation studies and proposed adsorption mechanism - Characterisation of untreated and treated adsorbents - Adsorption studies - System kinetics - Adsorption isotherms - Thermodynamics - Statistical error analysis
- RESULTS AND DISCUSSION : Characterisation of untreated and treated adsorbents - Preliminary investigations - Impact of various physiochemical process variables for deciding the optimum adsorption parameters - Isothermal investigation - Kinetic modelling - Thermodynamics studies - Comparison of the obtained results with other PH adsorbents
- Table 1 : Adsorption isotherm constants and statistical error parameters for the treated adsorbents under testing
- Table 2 : Kinetic constants and statistical error parameters for the treated PH stem adsorbent and AC
- Table 3 : Comparison of maximum adsorption capacity for experimental results and reported literature resultsDOI : https://doi.org/10.1111/cote.12526 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12526 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36090
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Code-barres Cote Support Localisation Section Disponibilité 22845 - Périodique Bibliothèque principale Documentaires Disponible Identification and quantification of CI Reactive Blue 19 dye degradation product in soil / Chengcheng Fen in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
[article]
Titre : Identification and quantification of CI Reactive Blue 19 dye degradation product in soil Type de document : texte imprimé Auteurs : Chengcheng Fen, Auteur ; Xinyi Sui, Auteur ; Mary Ankeny, Auteur ; Nelson R. Vinueza, Auteur Année de publication : 2021 Article en page(s) : p. 251-258 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie)
Bleu (couleur)
Caractérisation
Colorants réactifs -- Biodégradation
CotonLe 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 (technologie)
Extraction (chimie)
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Landfills are becoming the most common way to dispose textiles. The presence of different types of dyes and finishes on textiles fabrics can become an important source of pollution during the degradation process, due to the fact that these chemicals can leach to the soil. The biodegradation of dyes from dyed fabrics is not fully understood, and what can leach into the soil can be more toxic. In this study, cotton fabrics were dyed with CI Reactive Blue 19 (RB19) and biodegraded in soil in a laboratory-controlled environment for a 90-day time interval by using the ASTM D 5988-18 method. A modified QuEChERS (quick, easy, cheap, effective, rugged, and safe) extraction method, in combination with liquid chromatography-mass spectrometry (LC-MS) analysis, was applied to soil containing RB19 after the degradation process. An unknown degradation product, with a mass-to-charge ratio (m/z) of 393, found in the soil was characterised and confirmed, via high-resolution MS and tandem MS, to be CI Acid Blue 25 (AB25). To quantify the confirmed unknown product extracted from the degraded soil sample, a quantitation method was developed using high-performance liquid chromatography-diode array detector-mass spectrometry (HPLC-DAD-MS). The quantitation method provided excellent linearity (R2 = 0.9990 ± 0.0006), accuracy (mean percentage error = 5.17 ± 1.88), precision (mean percentage coefficient of variation = 4.73 ± 4.16), and sensitivity (lower limit of quantitation = 1.29 ± 0.47 µg/mL) for nine concentrations ranging from 0.5 to 40 µg/mL. Note de contenu : - EXPERIMENTAL : Materials and reagents - Product extraction via QuEChERS method - Detection and structural elucidation of RB19 degradation products - Quantification of standard AB25 spiked from blank soil
- RESULTS AND DISCUSSION : Detection and structural elucidation of RB19 degradation products from soil - Quantification of standard AB25 dye solutions
- Table 1 : The results of intra- and inter-day accuracy and precision of each concentration point of standard CI Acid Blue 25 (aB25) evaluated by liquid chromatography-diode array detector-mass spectrometry (LC-DAD-MS) method
- Table 2 : Summary of validation parameters on standard CI Acid Blue 25 (AB25) quick, easy, cheap, effective, rugged, and safe (QuEChERS) quantification methodDOI : https://doi.org/10.1111/cote.12527 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12527 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36091
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Code-barres Cote Support Localisation Section Disponibilité 22845 - Périodique Bibliothèque principale Documentaires Disponible Optimisation of ultrasonic-assisted extraction of natural dyes from pomegranate rind using response surface methodology and its characterisation / TengFei Lei in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
[article]
Titre : Optimisation of ultrasonic-assisted extraction of natural dyes from pomegranate rind using response surface methodology and its characterisation Type de document : texte imprimé Auteurs : TengFei Lei, Auteur ; Ying Pan, Auteur ; Bin Zhang, Auteur ; RongZhan Liu, Auteur ; YuanFeng Pan, Auteur Année de publication : 2021 Article en page(s) : p. 259-271 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens
Antioxydants
Caractérisation
Colorants végétaux
Extraction par ultrasons
Fourier, Spectroscopie infrarouge à transformée de
Grenade (fruit) et constituants
Mesure
Plan d'expérience
Teinture -- Fibres textilesIndex. décimale : 667.2 Colorants et pigments Résumé : This paper reports the optimal ultrasonic-assisted extraction (UAE) conditions for the maximum recovery of natural dyes from pomegranate rind using response surface methodology. The optimum UAE conditions were found to be an extraction time of 60 minutes, an extraction temperature of 65°C, a water to material ratio of 19 mL/g and an ultrasonic power of 132 W. The yield of the extracted pomegranate rind dyes (PRD) under optimum conditions was 17.1% ± 0.1%, which closely agrees with the predicted value of 17.2%. Fourier Transform–infrared and ultraviolet-visible absorption spectroscopy indicated that there were no significant structural changes in the PRD under optimal UAE conditions. The PRD particle size was clearly reduced, and the distribution was more uniform under the action of the ultrasonic waves. The total anti-oxidant activity of the PRD was analysed using DPPH• assay, and the results indicated that a proper and reasonable ultrasonic-assisted treatment can enhance the anti-oxidant capacity of the pomegranate rind natural dyes. Furthermore, in comparison with Staphylococcus aureus using the Agar plate method, the anti-bacterial activity indicated that the fabrics dyed with PRD under UAE conditions displayed outstanding anti-bacterial activity. Note de contenu : - EXPERIMENTAL : Materials - PRD extraction procedure - Measurements - Experimental design
- RESULTS AND DISCUSSION : Optimisation of the UAE conditions by RSMDOI : https://doi.org/10.1111/cote.12528 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12528 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36092
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Code-barres Cote Support Localisation Section Disponibilité 22845 - Périodique Bibliothèque principale Documentaires Disponible Colour space conversion model from CMYK to CIELab based on CS-WNN / Zebin Su in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
[article]
Titre : Colour space conversion model from CMYK to CIELab based on CS-WNN Type de document : texte imprimé Auteurs : Zebin Su, Auteur ; Jinkai Yang, Auteur ; Pengfei Li, Auteur ; HuanHuan Zhang, Auteur ; Junfeng Jing, Auteur Année de publication : 2021 Article en page(s) : p. 272-279 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie
Couleur -- AnalyseIndex. décimale : 535.6 Couleur Résumé : In the process of colour space conversion from CMYK to CIELab, colour difference will be caused, which has a negative impact on the quality of digital printing products. In this article, an improved wavelet neural network (WNN) model optimised by cuckoo search (CS) algorithm is proposed to reduce the colour difference. Initially, the colour space conversion model based on WNN is established. The CS algorithm is used to optimise the initial weights and parameters of dilation and translation in the WNN model. Then, 1296 samples are made to train the CS-WNN model. Finally, 100 test samples are input into the trained network to obtain the corresponding L, a and b values of CIELab. The experimental results show that the average conversion colour difference (urn:x-wiley:14723581:media:cote12529:cote12529-math-0001) of the proposed model is 3.469. The conversion accuracy and stability of the proposed model are better than the traditional neural network. Note de contenu : - MODEL CONSTRUCTION : Wavelet neural network - Cuckoo search algorithm - Establishment of colour space conversion model based on CS-WNN
- EXPERIMENT RESULT
- Table 1 : CIELab colour difference of four colour converson models
- Table 2 : Independent sample testDOI : https://doi.org/10.1111/cote.12529 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12529 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36093
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Code-barres Cote Support Localisation Section Disponibilité 22845 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and absorption properties of five new heterocyclic disazo dyes containing pyrazole and pyrazolone and their acute toxicities on the freshwater amphipod Gammarus roeseli / Aykut Demirçali in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
[article]
Titre : Synthesis and absorption properties of five new heterocyclic disazo dyes containing pyrazole and pyrazolone and their acute toxicities on the freshwater amphipod Gammarus roeseli Type de document : texte imprimé Auteurs : Aykut Demirçali, Auteur ; Fikret Karci, Auteur ; Fikret Sari, Auteur Année de publication : 2021 Article en page(s) : p. 280-291 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption
Analyse toxicologique
Caractérisation
Colorants -- Synthèse
Colorants -- Toxicologie
Colorants azoïques
solvants
Tests de toxicitéIndex. décimale : 667.2 Colorants et pigments Résumé : In this study, five new heterocyclic disazo dyes containing pyrazole and pyrazolone were synthesised (3a-3e). The synthesised disazo dyes were characterised by elemental analysis and Fourier Transform–infrared and proton nuclear magnetic resonance spectroscopy. The effects of two different solvents upon the absorption ability of the dyes substituted with electron-withdrawing and electron-donating groups were examined in detail. In addition, the acute toxicity of each synthesised azo dye was evaluated using a short-term bioassay with Gammarus roeseli (Crustacea: Amphipoda) for 48 hours. According to the evaluations, the dyes 3a, 3b and 3d were categorised as slightly toxic, and the dyes 3c and 3e as practically non-toxic. Considering the toxicity of the dye 3a, it was determined that the substitution of the electron-withdrawing group in the azo dye resulted in more toxicity, while the substitution of the electron-donating group resulted in less toxicity. It was also found that the presence of the strongly electron-withdrawing group resulted in the azo dye becoming more toxic in comparison with the presence of the weakly electron-withdrawing group, but that the presence of the strongly electron-donating group resulted in the azo dye becoming less toxic in comparison with the presence of the weakly electron-donating group. It is contended that this study is novel and of great importance in terms of synthesising new azo dyes, investigating their absorption properties and assessing their acute toxicities. Note de contenu : - EXPERIMENTAL : General - Synthesis of 2-arylhydrazo-3-ketiminobutyronitriles (1a-1e) - Synthesis of 5-amino-4-arylazo-3-methyl-1H-pyrazoles (2a-2e) - Synthesis of new disazo dyes containing pyrazole and pyrazolone (3a-3e) - Acute toxicity test
- RESULTS AND DISCUSSION : Spectral characteristics and tautomerism - Solvent effects - Substituent effects - Acute toxicity test
- Table 1 : Spectral data for Fourier Transform-infrared (FTIR) and proton nuclear magnetic resonance (1H-NMR) analyses of the new synthesised dyes 3a-3e
- Table 2 : Absorption maxima and molar absorption coefficients of the newly synthesised dyes 3a-3e in two different solvents
- Table 3 : The 24- and 48-hour LC50 values (mg/L) together with acute toxicity ratios ofthe newly synthesised azo dyes 3a-3e for Gammarus reseli used as the test organism. 95% confidence intervals are given in parenthesesDOI : https://doi.org/10.1111/cote.12530 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12530 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36094
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Code-barres Cote Support Localisation Section Disponibilité 22845 - Périodique Bibliothèque principale Documentaires Disponible Study into the cold pad-batch application of monochloro-s-triazinyl and m-carboxypyridinium-s-triazinyl reactive dyes bearing various "second-leg" N-substituents / Huei-Chin Huang in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
[article]
Titre : Study into the cold pad-batch application of monochloro-s-triazinyl and m-carboxypyridinium-s-triazinyl reactive dyes bearing various "second-leg" N-substituents Type de document : texte imprimé Auteurs : Huei-Chin Huang, Auteur ; Chun-Guey Wu, Auteur Année de publication : 2021 Article en page(s) : p. 292-298 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants réactifs Tags : 'Teinture pad-batch à froid' 'Colorants réactifs' Index. décimale : 667.2 Colorants et pigments Résumé : A series of monochloro-s-triazinyl (MCT) and related m-carboxypyridinium-s-triazinyl (nicotinic acid [NTR]) reactive dyes based on the same red chromophore and bearing –NHCN, –OCH3, –N(CH3)SO2CH3, –N-methylphenyl and –OH “second-leg” substituents were evaluated in cold pad-batch dyeing. It was found that both the MCT and NTR dyes containing a cyanoamino second-leg substituent displayed a superior technical performance to the dyes bearing methoxy, N-methyl(methylsulphonyl)amino, hydroxyl and N-methylaniline substituents. The results suggest that these technical benefits of dyeing are derived from the smaller molecule size and electronic effect of the cyanoamino group compared with the other second-leg substituents commonly used in both MCT and NTR reactive dye synthesis. Indeed, the use of the cyanoamino second leg on the studied red NTR reactive dyes offered a combination of short batch time, high fixation efficiency, good build-up properties and good wet fastness properties. DOI : https://doi.org/10.1111/cote.12531 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12531 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36095
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