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A diverse color-tunable luminous polyurethane leather coating based on long persistent phosphors and photochromic spiropyrans / Saiqi Tian in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 4 (04/2019)
[article]
Titre : A diverse color-tunable luminous polyurethane leather coating based on long persistent phosphors and photochromic spiropyrans Type de document : texte imprimé Auteurs : Saiqi Tian, Auteur ; Zhe Sun, Auteur ; Haojun Fan, Auteur ; Jun Yan, Auteur Année de publication : 2019 Article en page(s) : p. 138-145 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale
Caractérisation
Couleur -- Analyse
Cuir
Fluorescence
Polyuréthanes
Revêtements organiques
SpyropyraneIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A diverse color-tunable luminous polyurethane leather coating (CLPU) which can reversibly change color as well as fluorescent emission through the UV-vis or UV-darkness circle was prepared, via covalent incorporation of amino-functionalized phosphors and photochromic 1-(2-Hydroxyethyl)-3,3-Dimethylindolino-6’-nitrobenzopyrylospiran (SP). X-Ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis absorption spectra, reflectance spectra, fluorescent spectra as well as the migration percentage were measured to characterize the resultant samples structure and properties. In daylight, CLPU appears white before 365 UV irradiation and violet after UV irradiation, due to the transition of the spiro forms of spiropyran to merocyanine forms. In darkness, CLPU emits intense green light before UV irradiation, and the light changes to orange after UV irradiation, due to the phosphors showing pleasant diverse color-tunable luminous effect. Note de contenu : - EXPERIMENTAL : Materials - Preparation of CLPU - PU and PU/SP preparation - Film and leather preparation - Characterization
- RESULTS AND DISCUSSION : Structure analysis - Coloration and de-coloration process - Fluorescent properties - Diverse color-tunable luminous effect - Thermal migration propertiesEn ligne : https://drive.google.com/file/d/1-LBKUUq7Fx44CKYyVNl40nzYZkTz8UdY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32275
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Code-barres Cote Support Localisation Section Disponibilité 20830 - Périodique Bibliothèque principale Documentaires Disponible Dyes based on the 2(1H)-quinolone skeleton as potential colorimetric and fluorescent sensors for cyanide anions / Jolanta Kolinska in COLORATION TECHNOLOGY, Vol. 135, N° 6 (12/2019)
[article]
Titre : Dyes based on the 2(1H)-quinolone skeleton as potential colorimetric and fluorescent sensors for cyanide anions Type de document : texte imprimé Auteurs : Jolanta Kolinska, Auteur ; Aleksandra Grzelakowska, Auteur ; Jolanta Sokolowska, Auteur Année de publication : 2019 Article en page(s) : p. 501-509 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Anions cyanure
Capteurs chimiques
Caractérisation
Colorants
Fluorescence
QuinolonesLes quinolones et fluoroquinolones1,2,3 forment une large classe d'antibactériens de synthèse qui comprennent les dérivés de l'acide nalidixique découvert en 1962 et utilisé chez l'homme dès l'année suivante. Cette famille d'antibactériens a fait l'objet de recherches très importantes aboutissant au dépôt de plus de 10 000 brevets. L'ajout de l'atome de fluor dans les années 1970 a permis d'augmenter fortement la pénétration des molécules quinolones dans les cellules (jusqu'à 200 fois plus) : ce fut la naissance des fluoroquinolones, puissants antibiotiques capables de lutter contre une grande variété de germes chez l'homme et l'animal.
Toxicologie cellulaireIndex. décimale : 667.2 Colorants et pigments Résumé : The sensing properties of dyes based on 2(1H) quinolones containing dicyanoethylene groups towards selected anions such as CN−, F−, I−, Cl−, SCN−, CH3COO−, NO−2and CIO−4were evaluated. The spectroscopic responses of these compounds were investigated in a solution of acetonitrile/water (1:9, v/v) and phosphate buffer at a pH of 7.4. These dyes were found to act as efficient colorimetric and high turn–off fluorescent sensors to cyanide anions. The fluorescence intensity was linearly related to the concentration of CN− from 1 to 10 µmol/L, and the detection limits reached a micromolar level of 6.7, 11.1, 3.8 and 7.2 µmol/L for 1-4, respectively. The cytotoxic effect of the dyes against human neuroblastoma cells (SH-SY5Y) was also determined by MTT assay. The examined compounds exhibited slight cytotoxicity against cells under experimental conditions. Note de contenu : - EXPERIMENTAL : General - General procedure for spectroscopic responses of compounds 1-5 to anions - Spectroscopic study - Determination of cell viability in livings cells - Cell viability
- RESULTS AND DISCUSSION : Spectroscopic characterisation of 2(1H)-quinolone derivatives - Spectroscopic characterisation of 2(1H)-quinolone derivatives in the presence of anions - Selectivity and competition studies - Cell viabilityDOI : 10.1111/cote.12438 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12438 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33381
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Code-barres Cote Support Localisation Section Disponibilité 21322 - Périodique Bibliothèque principale Documentaires Disponible Dyes based on the azo-1H-pyrrole moiety – synthesis, spectroscopic and electrochemical properties, and adsorption on TiO2 / Anna Maruszewska in COLORATION TECHNOLOGY, Vol. 132, N° 1 (02/2016)
[article]
Titre : Dyes based on the azo-1H-pyrrole moiety – synthesis, spectroscopic and electrochemical properties, and adsorption on TiO2 Type de document : texte imprimé Auteurs : Anna Maruszewska, Auteur ; Radoslaw Podsiadly, Auteur Année de publication : 2016 Article en page(s) : p. 92-97 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse électrochimique
Analyse spectrale
Caractérisation
Colorants -- Adsorption
Colorants -- Chimie
Colorants -- Synthèse
Colorants azoïques
Dioxyde de titaneIndex. décimale : 667.3 Teinture et impression des tissus Résumé : A series of novel azo dyes based on the azo-1H-pyrrole moiety were synthesised. The dyes were characterised in terms of their spectroscopic, electrochemical, and physicochemical properties. In these dyes, the electron-rich 1H-pyrrole moiety was assembled as π-bridges in donor–acceptor π-conjugated dye, and aminophenylimine fragments and the carboxyl group were used as donor and anchoring acceptor groups respectively. The dyes had adequate HOMO and LUMO levels that matched the conduction band of TiO2 and the redox potential of the electrolyte. The adsorption of these azo compounds with carboxyl group(s) on TiO2 was investigated. Experimental data showed that the introduction of two carboxyl groups could greatly enhance the adsorption efficiency of the studied dyes on TiO2. The sorption kinetics was measured for selected dyes derived from 5-aminoisophthalic acid. Results indicate that a pseudo-second-order equation can better describe the adsorption kinetics of these dyes on TiO2. Note de contenu : - EXPERIMENTAL : General - Synthesis of azopyrrole-2-carbaldehydes - Synthesis of dye 4a
- RESULTS AND DISCUSSION : Synthesis and spectroscopic studies - Electrochemical properties - Adsorption studiesDOI : 10.1111/cote.12192 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12192/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25580
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Code-barres Cote Support Localisation Section Disponibilité 17865 - Périodique Bibliothèque principale Documentaires Disponible Effect of artificial weathering and temperature cycling on the performance of coating systems used for wooden windows / Eliska Oberhofnerova in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)
[article]
Titre : Effect of artificial weathering and temperature cycling on the performance of coating systems used for wooden windows Type de document : texte imprimé Auteurs : Eliska Oberhofnerova, Auteur ; Stepan Hysek, Auteur ; Milos Panek, Auteur ; Martin Böhm, Auteur Année de publication : 2018 Article en page(s) : p. 851-865 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale
Bois -- Revêtements
Brillance (optique) -- Mesure
Décoloration
Essais accélérés (technologie)
Microscopie électronique à balayage
Polyacrylates
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The effects of ultraviolet light irradiation and water spray and temperature cycling on the color stability of waterborne coating systems on spruce were investigated. The test samples were treated with three coating systems (white and brown pigmented acrylate waterborne coatings systems with different layering) from six producers. The artificial weathering was carried out based on standardized (504 h) and increased weathering parameters (504 h). Thirty cycles of temperature changes were performed. Discoloration suggesting the rate of degradation process and color stability was measured by a spectrophotometer in L*a*b* color space. The results showed greater color stability of white coating systems during both experiments. The producer of acrylate coatings with iodopropynyl butyl carbamate and permethrin as biocides and benzotriazole, silicon dioxide and methylsiloxane as additives was characterized by the best coatings performance. The most sensitive color parameter to describe the surface quality as a result of irradiation and water spray has proven to be a change of lightness. A tendency towards degradation with increasing lightness was observed during weathering. The effect of temperature itself on color change was minimal. Scanning electron microscopy and energy dispersive spectroscopy revealed microscopic changes of coatings caused by artificial weathering. Note de contenu : - EXPERIMENTAL : Material and coating application - Artificial weathering - Temperature cycling - Color measurements - Gloss measurements - Scanning electron microscopy and energy dispersive spectroscopy - Statistical evaluation
- RESULTS AND DISCUSSION : Color changes after artificial weathering test - Color changes after temperature cycling - Gloss measurement - Scanning electron microscopy and energy dispersive spectroscopyDOI : 10.1007/s11998-017-0033-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0033-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30862
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Code-barres Cote Support Localisation Section Disponibilité 20078 - Périodique Bibliothèque principale Documentaires Disponible Effect of pendant functional groups on curing kinetics and final properties of cardanol-based benzoxazines / Kunal Wazarkar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 3 (05/2018)
[article]
Titre : Effect of pendant functional groups on curing kinetics and final properties of cardanol-based benzoxazines Type de document : texte imprimé Auteurs : Kunal Wazarkar, Auteur ; Anagha Sabnis, Auteur Année de publication : 2018 Article en page(s) : p. 555-569 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale
Analyse thermique
Benzoxazine
Cardanol
Cinétique chimique
Composés organiques -- Synthèse
Polymérisation
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : The present study reveals the effect of pendant functional groups on curing and final properties of cardanol-derived benzoxazines. Three benzoxazines are synthesized by choosing three functional amines, namely aniline, 4-aminophenol, and 4-aminobenzoic acid. The structure of the benzoxazines is confirmed by chemical as well as spectroscopic analysis. Curing kinetics of benzoxazines is studied using nonisothermal differential scanning calorimetry (DSC) at four different heating rates: 5, 10, 15, and 20 degrees per minute. Further, kinetic models of Kissinger and Flynn–Wall–Ozawa are applied to determine the kinetic parameters of the curing reaction. Curing kinetics and modeling studies reveal that benzoxazine containing phenolic OH requires lower energy of activation for curing as compared to carboxyl functional benzoxazine and neat benzoxazine. Moreover, coatings are applied on mild steel (MS) panels and evaluated for mechanical, chemical, and thermal properties. Note de contenu : - MATERIALS
- EXPERIMENTAL : Synthesis of benzoxazines - Panel preparation - Coating application
- INSTRUMENTATION
- CHARACTERIZATION
- RESULTS AND DISCUSSIONS : FTIR spectroscopy - H-NMR spectroscopy - Gel permeation chromatography - Curing kinetics by nonisothermal DSC analysis - Mechanism of curing - Coating propertiesDOI : 10.1007/s11998-017-0020-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0020-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30752
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Code-barres Cote Support Localisation Section Disponibilité 20024 - Périodique Bibliothèque principale Documentaires Disponible Effect of TiO2 on visual shielding property of PET filaments / Liu Zhaolin in CHEMICAL FIBERS INTERNATIONAL, Vol. 71, N° 2 (06/2021)
PermalinkEffect of TiO2 on visual shielding property of PET filaments / Liu Zhaolin in CHEMICAL FIBERS INTERNATIONAL, (10/2021)
PermalinkEffects of additives on the phase behavior of an EO/PO-copolymer / Janine Birnbach in SOFW JOURNAL, Vol. 147, N° 3 (03/2021)
PermalinkEffects of atmospheric pressure plasma treatments on various properties of leathers / Safiye Meric Acikel in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 7 (07/2013)
PermalinkElectrochemical, spectroscopic and microscopic investigation of PEDOT coated nickel plate from aqueous micellar solutions and its anti-corrosion performances / Z. Aouzal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
PermalinkElectrospun CS-PEO/PCL core-shell nanofibers / Song Ziyu in CHEMICAL FIBERS INTERNATIONAL, Vol. 71, N° 1 (04/2021)
PermalinkEliminating material dependency in spectra measurement via non-neighbouring band regression / Hui-Liang Shen in COLORATION TECHNOLOGY, Vol. 132, N° 2 (04/2016)
PermalinkEnhanced sun protection of nano-sized metal oxide particles over conventional metal oxide particles : An in vitro comparative study / Priyanka Singh in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 36, N° 3 (06/2014)
PermalinkEnvironmentally friendly coloration of cotton by the UV-induced photografting of a-bromoacrylamido dyes / Yuanyuan Dong in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)
PermalinkEtude spectroscopique des paramètres température et densité électronique dans des plasmas induits par haute fréquence / Jean Jarosz / 1978
PermalinkEvaluation of potential application for sunt pod extracts (Acacia nilotica) in leather tanning / A. I. Nasr in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 1 (01/2017)
PermalinkEvaluation of the weathering resistance of waterborne acrylic- and alkyd-based coatings containing HALS, UV absorber, and bark extracts on wood surfaces / Özlem Özgenç in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
PermalinkEx vivo-In vivo correlation of retinol stratum corneum penetration studies by confocal Raman microspectroscopy and tape stripping / Richard Krombholz in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 44, N° 3 (06/2022)
PermalinkExamination of the distribution of TPO adhesion promoter material in a painted TPO system / T. J. Prater in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 857 (06/1996)
PermalinkA facile synthesis and tautomeric structure of novel 4-arylhydrazono-3-(2-hydroxyphenyl)-2-pyrazolin-5-ones and their application as disperse dyes in COLORATION TECHNOLOGY, Vol. 129, N° 6 (12/2013)
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