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Investigation into the sequential application of cationic/anionic fixing agents to improve the oxidative washing resistance of CI Leuco Sulphur Black 1-dyed cotton fabric / Quratulain Mohtashim in COLORATION TECHNOLOGY, Vol. 136, N° 3 (06/2020)
[article]
Titre : Investigation into the sequential application of cationic/anionic fixing agents to improve the oxidative washing resistance of CI Leuco Sulphur Black 1-dyed cotton fabric Type de document : texte imprimé Auteurs : Quratulain Mohtashim, Auteur ; Muriel Rigout, Auteur ; Chris Carr, Auteur Année de publication : 2020 Article en page(s) : p. 263-269 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie
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).
Fixateurs (chimie)
Oxydation
Photostabilité
Résistance à l'abrasion
Résistance à la traction
Solidité de la couleur
Solidité de la teinture
Sulfure de sodium
Teinture -- Fibres textiles
Textiles et tissus -- Finition
Textiles et tissus -- LavageIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Sulphur-dyed cellulosic textiles are susceptible to washing powders containing activated peracid formulations resulting in obvious fading during repeated laundering. This study presents a novel one-bath/two-stage exhaust finishing process to improve the oxidative wash fastness of CI Leuco Sulphur Black 1-dyed cotton fabric. The effect of the combined Tinofix ECO and Bayprotect Cl after-treatment was to impart better colour fastness to oxidative International Organisation for Standardisation (ISO) 105 CO9 washing of the dyed cotton compared with those dyed fabrics after-treated with Tinofix ECO alone. In addition, while the dyed fabrics rub and light fastness performances were unchanged by the after-treatments, some improvement in the tensile strength of the combined Tinofix ECO and Bayprotect Cl after-treated fabrics was observed. Note de contenu : - EXPERIMENTAL : Materials - Dyeing with Diresul RAD - Dyeing with sodium sulphide - After-treatment with Tinofix ECO - After-treatment with Bayprotect Cl - Colour measurement - Determination of fastness properties - Strength measurement
- RESULTS AND DISCUSSION : The effect of varying concentrations of Tinofix ECO on the wash fastness of sulphur-dyed cotton fabric - The effect of varying concentrations of Bayprotect Cl on the wash fastness of 5% owf Tinofix ECO-treated sulphur-dyed fabrics - Development of a one-bath/two-stage wash protection process - The effect of Tinofix ECO and Bayprotect Cl after-treatments on the rubbing and light fastness of Cl Leuco Sulphur Black 1-dyed cotton fabric - The effect of Tinofix ECO and Bayprotect Cl after-treatments on the tensile strength of Cl Leuco Sulphur Black 1-dyed cotton fabricDOI : https://doi.org/10.1111/cote.12460 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12460 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34299
in COLORATION TECHNOLOGY > Vol. 136, N° 3 (06/2020) . - p. 263-269[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21787 - Périodique Bibliothèque principale Documentaires Disponible Investigation of tartaric acid-copper sulphate mixture as a light stabilizer in leather dyeing / N. H. El-Sayed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 4 (07-08/2003)
[article]
Titre : Investigation of tartaric acid-copper sulphate mixture as a light stabilizer in leather dyeing Type de document : texte imprimé Auteurs : N. H. El-Sayed, Auteur ; A. A. Haroun, Auteur ; M. Stoll, Auteur Année de publication : 2003 Article en page(s) : p. 138-143 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Bleu (couleur)
Cuirs et peaux -- Teinture
Photostabilité
Rouge (couleur)
Stabilisants à la lumière
Sulfate de cuivreLe sulfate de cuivre est formé par la combinaison d'un ion cuivre (Cu2+) et d'un ion sulfate (SO42- ). Il a donc pour formule : CuSO4. Il est commercialisé soit anhydre, avec cette formule, soit pentahydraté et a alors la formule CuSO4,5H2O, comme sur la figure ci-contre. Il existe également avec une ou trois molécules d'eau d'hydratation.
FABRICATION : Le sulfate de cuivre est obtenu industriellement comme sous-produit du décapage chimique du cuivre par l'acide sulfurique. Cet acide n'attaquant pas le cuivre métallique, seule sa forme oxydée présente en surface sous forme d'oxydes, de carbonates (vert de gris) et autres, passe en solution. Dans ces conditions, seul le degré d'oxydation II (forme cuivrique) est stable.
UTILISATION : Une des principales utilisations actuelle du sulfate de cuivre est la préparation (industrielle ou non) de fongicides pour l'agriculture y compris biologique. La forme la plus courante est la bouillie bordelaise constituée de sulfate de cuivre neutralisé par la chaux.
TOXICITE : Le sulfate de cuivre est un produit toxique.
Tartrique, Acide
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The optimum concentrations of a tartaric acid-copper sulphate mixture used as a light stabilizer, with wet-blue dyed with Neolan Red GRE, Cibacron Turquoise Blue and Procion Red MX-5B were found to be (3/3%), (4/4%) and (3/3%) respectively.
The proposed mechanism of the reaction between the tartaric acid-Cu complex and the dyestuffs during dyeing processes - which was confirmed by NIR spectroscopy - was that the complex was formed through both the hydroxyl and carboxyl groups to form a ligand with copper metal and the free carboxyl groups were the more likely reactants than the free hydroxyl groups during complex formation.
Dyestuffs with free amino groups can easily react with the tartaric-Cu complex by covalent bonding, at the same time, according to the percentage of Cu2+ ions used, the copper forms a ligand with the free anionic groups of the dyestuffs.
Evaluation of the copper ions remaining after the dyeing processes gave the most suitable concentration of copper sulphate, which should not exceed 0.5% with the tartaric acid as high as 2%.
This range was recommended to safely minimize the level of the residual copper ions, when the mixture was used as light stabilizer during leather dyeing.Note de contenu : - NIR-spectroscopy of the tartaric acid/ copper mixture
- Standard dyeing method
- Spectrophotometric measurements
- Determination of the remaining Cu-ions in the waste water after dyeing
- Determination of light fastness
- Table 1 : Effect of copper sulphate/tartaric acid mixture on dyeing parameters of wet-blue
- Table 2 : Effect of copper sulphate/tartaric acid mixture on dyeing parameters of crust leather
- Table 3 : Interpretation of The Second Derivative-NIR Spectrum
- Table 4 : Analysis data of Cu2+ ions in the waste water from the dyeing process
- Table 5 : Effect of Tartaric-Cu complex on the light fastness of dyed leatherEn ligne : https://drive.google.com/file/d/1icMqWFnfI3OCfYNNJ_6d9BaQgtoSDyqI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39769
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 4 (07-08/2003) . - p. 138-143[article]
[article]
Titre : Is my sun protection fading away Type de document : texte imprimé Auteurs : Jürgen Volhardt, Auteur Année de publication : 2021 Article en page(s) : p. 2-6 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques
Cosmétiques -- Détérioration
Peau -- Soins et hygiène
Photodétérioration
Photostabilité
Produits antisolairesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Sunscreens are widely used to protect against damaging effects of sun exposure. Avoiding the pain of sunburn is a key motivator for applying sunscreen, however, these products offer much broader protection because when applied correctly and balanced with informed and managed exposure, they can also protect against skin cancer and minimize skin ageing effects. A product category that has such widespread use needs to be very safe in all foreseeable ways. It also needs to be compatible with the environment, in particular marine flora and fauna as it will often be used in coastal areas such as the beach. Due to the general popularity of sunscreens, concerns of any kind tend to spread rapidly, even if an adversity claim has only been formulated as a potential hazard without proper investigation or evaluation of the likelihood and impact of the risk. Even for scientists, risk evaluations are labor-intensive processes that require a solid scientific education, so unsurprisingly, consumers who cannot make such evaluations on their own, often adopt an avoidance strategy towards potential hazards. In the case of sunscreens though, this increases the risk further, and not just in terms of sunburn, because the skin cancer incidence rate also increases. In view of this, it is of utmost importance to stick to the facts, to perform a risk analysis on hazard claims, and to provide clear information to consumers before they consider avoidance actions which may entail not so obvious downsides.
Another concern that has materialized around sunscreen centers on the fact that some UV filters – or combinations of UV filters – are not photostable and degrade, leading to a loss of performance. It sounds like a contradiction in terms that sun radiation itself could reduce the efficacy of a product designed to protect against such radiation. We have therefore revisited this topic and investigated state of the art formulas to assess how much performance is lost after a full day at the beach or on a sunny winter’s day skiing outdoors. We have also looked at the impact of photostability and claim making. What strategy should be followed – especially when creating high protection formulas? Finally, we have considered what photo-stability could mean in terms of the environment.Note de contenu : - WHAT IS PHOTO-INSTABIILTY ? : Photo-destruction - Photo-isomerization - Photo-reactions - Oxidative processes
- THE IMPACT OF PHOTOSTABILITY ON CONSUMERS USING SUNSCREENS
- PHOTOSTABILITY AND ITS IMPACT ON ACHIEVING A VERY HIGH SPF CLAIM
- PHOTOSTABILITY IN THE ENVIRONMENT
- Fig. 1 : Stability of Avobenzone in a commercial sunscreen lotion SPF 50+En ligne : https://drive.google.com/file/d/16sDPsrxwFEd3JvAD3d10nlBhiQkIKmWr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36182
in SOFW JOURNAL > Vol. 147, N° 8 (07-08/2021) . - p. 2-6[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22840 - Périodique Bibliothèque principale Documentaires Disponible Leather surface refinement with application of the TIO2-SIO2-GLYMO Nanocomposite and lacquer coating / Meruyert Kaygusuz in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 5 (09-10/2018)
[article]
Titre : Leather surface refinement with application of the TIO2-SIO2-GLYMO Nanocomposite and lacquer coating Type de document : texte imprimé Auteurs : Meruyert Kaygusuz, Auteur ; Nuray Olcay Isik, Auteur ; Michael Meyer ; Ahmet Aslan Année de publication : 2018 Article en page(s) : p. 234-240 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion
Caractérisation
Cuir
Cuirs et peaux -- Finition
Cuirs et peaux -- Propriétés mécaniques
Dépôt par pulvérisation
Matériaux hybrides
Oxydes métalliques
Photostabilité
Réaction de couplage
Résistance à l'abrasion
Revêtements
Sol-gel, Procédé
Solidité de la couleur
VernisIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the present study the effect of TiO2-SiO2-GLYMO nanocomposite on surface properties of leather was investigated. The TiO2-SiO2-GLYMO composite was prepared through the sol-gel route from tetraethoxysilane (TEOS) and titanium n-butoxide (TBO). 3-glycidoxypropyltrimethoxysilane (GLYMO) was added as coupling agent to provide a stable bond between metal oxides and leather substrate. The prepared composite was applied by spraying on the top coat of leathers in finishing. The surface properties observed by scanning electron microscopy (SEM) showed an even and homogenous coating obtained on leather by application of the composite in the presence of lacquer. The chemical structure of composite films was examined via Fourier transform infrared (FTIR) and Si-O-Ti bond and opening of epoxy rings of GLYMO were revealed. The presence of Ti and Si in the composite treated leather samples was ascertained by inductively coupled plasma optic emission spectrometer (ICP-OES). The results of the physical and fastness tests indicated that the use of TiO2-SiO2-GLYMO nanocomposite improves some performance characteristics of leather such as finish adhesion, dry and wet rubbing fastness, colour fastness to light and UV light. The results are promising for the refinement of leather surface with the application of the nanocomposite in the finishing process. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation and characterization of TiO2-SiO2-GLYMO composite - Application of TiO2-SiO2-GLYMO composite on leather - Characterisation and determination of surface properties of leathers treated with TiO2-SiO2-GLYMO nanocomposite
- RESULTS : Characterisation of the leather samples - Physical and fastness properties of leathersEn ligne : https://drive.google.com/file/d/1Q1a_bibn8FusdKXvK2TYDkFNIUZiIWKP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31094
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 5 (09-10/2018) . - p. 234-240[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20281 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Less yellowing in UV coat : Novel light stabilisers evaluated in water-borne UV-curable coatings Type de document : texte imprimé Auteurs : Yung-Chi Yang, Auteur ; Ming-hua Lai, Auteur ; Yu-Shu Sung, Auteur ; Yin-Ting Lai, Auteur ; Chung-Han Lu, Auteur ; Hsiao-Fang Chiu, Auteur ; Chih-Hsien Chein, Auteur ; Steven Lee, Auteur ; Yao-Hsing Huang, Auteur Année de publication : 2017 Article en page(s) : p. 136-140 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Essais (technologie)
Photostabilité
Polyuréthanes
Rayonnement ultraviolet A
Résistance au jaunissement
Revêtements -- Effets du rayonnement ultraviolet:Peinture -- Effets du rayonnement ultraviolet
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet:Peinture en phase aqueuse -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : Water-borne UV-curable coatings may discolour during curing or on exposure to natural UV light. A novel light stabiliser (NLS) was developed specifically for water-borne UV curable coatings. Tests showed that the NLS gave effective protection, but with far less efect on cure speed than either UVA or HALS. Note de contenu : - Basis of the test procedures
- HALS can retard curing more than UV absorber
- NLS has little effect on cure speed
- Dispersion test shows stability of NLS
- Calculating the optimal results
- Individual effects summarises
- The optimal prediction profiler
- Yellowing reduction obtained at full cured speed
- FIGURES : 1. Effect of reducing yellowing by LS and DFT during curing process test (prediction profiler) - 2. The response surface methodology plot for reducing yellowing by NLS and DFT during the curing process - 3. Photo of 3% NLS in UV-curable water-borne polyurethane coating at a film thickness of 20 µm after curing
- TABLES : 1. Compositions of water-borne UV model formulations. All components formulated to be suitable for water-based systems - 2. Details ofscreening design and test results - 3. Effect of curing energy with water-borne UVA, HALS and NLS in water-borne UV curable model formulation (where ? = degree of effect, ? = degree of fredom , SS = sum of squares and MS = mean squar)En ligne : https://drive.google.com/file/d/1szzkATCWCN6Dqrvc0vXnNwR476Q8u21e/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28278
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2017) . - p. 136-140[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18809 - Périodique Bibliothèque principale Documentaires Disponible Let there be light / Allen Zielnik in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 197, N° 4516 (09/2007)
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PermalinkLight stabilizers for coatings / Andreas Valet / Hannover [Germany] : Vincentz Network GmbH & Co. (2017)
PermalinkLipid nanoparticles and spontaneous precipitation of a fatliquoring agent / Xu-Gang Dang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 4 (07-08/2016)
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