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Effects of isomerism on near infrared properties of perylene bisimide derivatives / Majid Mazhar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
[article]
Titre : Effects of isomerism on near infrared properties of perylene bisimide derivatives Type de document : texte imprimé Auteurs : Majid Mazhar, Auteur ; Majid Abdous, Auteur ; Kamaladin Gharanjig, Auteur ; Reza Teimuri-Mofrad, Auteur ; Mojdeh Zargaran, Auteur Année de publication : 2017 Article en page(s) : p. 204-217 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Diffractométrie de rayons X
IsomérieEn chimie organique, on parle d'isomérie lorsque deux molécules possèdent la même formule brute mais ont des formules développées ou stéréochimiques différentes. Ces molécules, appelées isomères, peuvent avoir des propriétés physiques, chimiques et biologiques différentes.
On distingue différents types d'isomérie, notamment l'isomérie de constitution (isomérie plane) et l'isomérie de configuration (stéréoisomérie).
Pérylène bisimide
Pigments organiques
RéflectanceIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, five different perylene bisimide derivatives are synthesized, four of which are structural isomers. The pigments are used to prepare corresponding paints and their ultraviolet–visible–near infrared (NIR) reflectance is investigated on two optically different substrates, namely high absorptive and high reflective substrates. These pigments are classified according to their NIR properties. They show substantial differences in NIR reflectance, transmittance, and absorbance despite their structural similarities. This indicates that the NIR properties of perylene bisimide derivatives are dependent on the nature of N-substituent and electronic environment of the molecule. This study shows that the existence of bonds with high-frequency fundamental vibrations and their counts which were introduced as affecting parameters on the NIR properties of the perylene pigments is not the main affecting factor and we should seek it elsewhere such as the crystal structure and intermolecular interactions of the pigments. Note de contenu : - EXPERIMENTAL : Materials - Synthesis procedure - Instruments - Paint preparation
- RESULTS AND DISCUSSION : XRD analysis - UV-Vis-NIR reflectanceDOI : 10.1007/s11998-016-9843-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9843-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27802
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Code-barres Cote Support Localisation Section Disponibilité 18674 - Périodique Bibliothèque principale Documentaires Disponible Effects of the side chain density of polycarboxylate dispersants on dye dispersion properties / Hamid Gharanjig in COLORATION TECHNOLOGY, Vol. 135, N° 2 (04/2019)
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Titre : Effects of the side chain density of polycarboxylate dispersants on dye dispersion properties Type de document : texte imprimé Auteurs : Hamid Gharanjig, Auteur ; Kamaladin Gharanjig, Auteur ; Alireza Khosravi, Auteur Année de publication : 2019 Article en page(s) : p. 160-168 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents dispersants (chimie)
Agents dispersants (chimie) -- Synthèse
Caractérisation
Colorants -- Solubilité
Dispersions et suspensions
Dispersions et suspensions -- Stabilité
Granulométrie
Polycarboxylates
Polyesters
Polymères en émulsion
Polymères ramifiés
Spectrophotométrie
Stabilité thermique
Teinture -- Fibres textiles synthétiques
TurbidimétrieLa turbidimétrie est la mesure du degré de turbidité d'une suspension. Elle est déterminée grâce à un système optique, en général un spectrophotomètre classique, qui mesure la diminution, due à l'absorbance, de l'intensité d'un rayon lumineux de longueur d'onde connue traversant la suspension. La turbidimétrie est utilisée en complément à la néphélométrie qui se base plutôt sur la diminution de l'intensité par diffusion de la lumière.Index. décimale : 667.2 Colorants et pigments Résumé : Comb‐like polycarboxylates were synthesised by copolymerisation of methacrylic acid and nonylphenol polyethylene glycol methacrylate ester, and can be used as dye dispersants. In order to achieve good dispersive ability, three polycarboxylates were synthesised, each having a different side chain density. The side chain density of polymers was controlled by different ratios of monomers in the copolymerisation process. Acidic polymers were neutralised using sodium hydroxide. These polymers exhibit good dispersing performance, such that carboxylate groups are adsorbed onto the dye particle surface and the side chains enable the formation of a thick layer, thus providing the steric hindrance effect. Improvement of dye dissolution in the presence of polycarboxylates was studied. Polymers with a lower side chain density demonstrated a higher dye dissolution in water, which could be as a result of more effective adsorption of dispersant on the dye surface (CI Disperse Blue 79). The dyeing performance of the prepared dye dispersions on polyester was investigated. Spectrophotometric analysis of dyed fabrics using synthesised polycarboxylates demonstrates that there should be an optimum side chain density of polymer in order to control both dye solubility and dispersive ability. The result of turbidimetry and particle size analysis have proven this phenomenon. A comb‐like polycarboxylate with optimum side chain density was a better dye dispersant compared with a commercial sodium naphthalene sulphonate compound, as a result of its better heat stability. Note de contenu : - EXPERIMENTAL : Chemicals and apparatus - Synthesis of dispersants - Solubility of CI Disperse Blue 79 - Optimisation of dispersant concentration - Dye dispersion stability - Measurement of build-up - Investigation of the heat stability of dye dispersions
- RESULTS AND DISCUSSION : Characterisation - Dye solubility - Effect of dispersant concentration on dyeing - Dye dispersion stability - Effect of polycarboxylates on build-up - Effect of polycarboxylates on the heat stability of dye dispersionsDOI : 10.1111/cote.12391 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12391 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32330
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Code-barres Cote Support Localisation Section Disponibilité 20869 - Périodique Bibliothèque principale Documentaires Disponible Equilibrium and kinetic studies of the cationic dye removal capability of a novel biosorbent Tamarindus indica from textile wastewater / Shooka Khorramfar in COLORATION TECHNOLOGY, Vol. 126, N° 5 (2011)
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Titre : Equilibrium and kinetic studies of the cationic dye removal capability of a novel biosorbent Tamarindus indica from textile wastewater Type de document : texte imprimé Auteurs : Shooka Khorramfar, Auteur ; Niyaz Mohammad Mahmoodi, Auteur ; Mokhtar Arami, Auteur ; Kamaladin Gharanjig, Auteur Année de publication : 2011 Article en page(s) : p. 261-268 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Chimie textile
Cinétique chimique
Colorants cationiques
Eaux usées -- Epuration
Equilibre chimique
Tamarinier et constituantsIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In this paper, the use of tamarind hull biosorbent (Tamarindus indica) has been investigated to remove cationic dyes from textile eflluent. Basic Violet 6 and Basic Red 18 were used as cationic dye models. The surface characteristics of tamarind hull were investigated using Fourier Transform–infrared and scanning electron microscopy. The influence of process variables such as adsorbent dosage, initial dye concentration and pH were studied. The presence of fuctional groups such as hydroxy and amine groups onto the tamarind hull surface were proved by Fourier Transform–infrared analysis. Data were evaluated for compliance with the Langmuir and Freundlich isotherm models. The results indicated that the data for adsorption of Basic Violet 6 and Basic Red 18 onto tamarind hull fitted well with the Freundlich isotherm model. Also, the adsorption kinetics of Basic Violet 6 and Basic Red 18 on biosorbent was studied. The rates of sorption were found to conform to pseudo-second-order kinetics with good correlation. Results indicated that tamarind hull could be used as a biosorbent to remove cationic organics from contaminated watercourses. DOI : 10.1111/j.1478-4408.2010.00256.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00256.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10889
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Code-barres Cote Support Localisation Section Disponibilité 012842 - Périodique Bibliothèque principale Documentaires Disponible 012846 - Périodique Bibliothèque principale Documentaires Disponible Novel hydrolysable azo disperse dyes based on N-ester-1,8-naphthalimide: dyeing of polyester–cotton blends / Javad Mokhtari in COLORATION TECHNOLOGY, Vol. 124, N° 5 (2008)
[article]
Titre : Novel hydrolysable azo disperse dyes based on N-ester-1,8-naphthalimide: dyeing of polyester–cotton blends Type de document : texte imprimé Auteurs : Javad Mokhtari, Auteur ; Kamaladin Gharanjig, Auteur ; Mokhtar Arami, Auteur ; Niyaz Mohammad Mahmoodi, Auteur Année de publication : 2009 Article en page(s) : p. 295-300 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The dyeing of polyester–cotton blends with new alkali-hydrolysable azo disperse dyes based on N-ester-1,8-naphthalimide was investigated. Polyester–cotton blend fabrics were dyed using both one- and two-bath methods. Dyes 3 and 4 offered lower colour yield on polyester using the one-bath method. For the rest of the dyes, employing either the one- or two-bath method resulted in a similar colour yield on polyester fabric. The results for fastness properties and colour yield of the dyeings showed that the dyes were suitable for dyeing polyester–cotton blends using the one-bath method. The kinetic study of hydrolysis of the dyes in alkali media obeyed the pseudo first-order reaction rate. DOI : 10.1111/j.1478-4408.2008.00155.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2008.00155.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3177
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Code-barres Cote Support Localisation Section Disponibilité 010965 - Périodique Bibliothèque principale Documentaires Disponible Optimising by response surface methodology the dyeing of polyester with a liposome-encapsulated disperse dye / Farahnaz Sadr Dadras in COLORATION TECHNOLOGY, Vol. 130, N° 2 (04/2014)
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Titre : Optimising by response surface methodology the dyeing of polyester with a liposome-encapsulated disperse dye Type de document : texte imprimé Auteurs : Farahnaz Sadr Dadras, Auteur ; Kamaladin Gharanjig, Auteur ; Sadigh Raissi, Auteur Année de publication : 2014 Article en page(s) : p. 86-92 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Encapsulation
Fibres polyesters
LécithineLa phosphatidylcholine est plus connue sous le nom lécithine.
Au sens le plus strict, la lécithine désigne uniquement les phosphatidylcholines c'est-à -dire un lipide formé à partir d'une choline, d'un phosphate, d'un glycérol et de deux acides gras (figure). Dans ce contexte, il serait plus juste de parler des lécithines, car il ne s'agit pas d'une seule molécule mais d'un groupe dont la composition en acide gras varie d'une molécule à l'autre. Ainsi, les lécithines vont adopter diverses couleurs selon leur composition : du jaune, pour la lécithine végétale, au brun, pour la lécithine de poisson.
Le terme de lécithine est aussi utilisé par extension pour désigner l'ensemble des phospholipides extraits du vivant (par exemple le soja), dans la mesure où ils sont majoritairement constitués de phosphatidylcholine.
Liposomes
Solidité de la couleur
Surfaces de réponse (statistique)
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Optimisation of conditions for dyeing polyester with liposome-encapsulated CI Disperse Red 50 was performed using response surface methodology. The effects of temperature, time, and lecithin:dye ratio on the colour strength of dyed fabrics were investigated by a central composite design. The coefficient of determination, the probability value in analysis of variance, and the normality plot of residuals demonstrated sufficient significance of the proposed fitness function. It was found that the temperature and time of the dyeing cycle were effective factors in the dyeing of polyester fabrics with encapsulated dye. It was also established that the colour yield of dyed fabrics was above 25 in the case of a dyeing time of >80 min, a lecithin:dye ratio of ?2, and a temperature of ca. 128 °C. Comparison of colour strengths produced by liposome-encapsulated dye and commercial dye revealed that there was approximately the same build-up on polyester. Dyeings from encapsulated CI Disperse Red 50 exhibited very similar fastness to dyeings from conventional CI Disperse Red 50. Note de contenu : - MATERIALS AND METHODS : Materials - Statistical modelling - Design of experiments
- RESULTS AND DISCUSSION : Liposomed disperse dyes - Statistical analysis - Build-up of liposome disperse dye on polyester fabrics - Colour fastness properties of dyed samplesDOI : 10.1111/cote.12073 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12073 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20863
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Code-barres Cote Support Localisation Section Disponibilité 16129 - Périodique Bibliothèque principale Documentaires Disponible Solubilisation kinetics of some monoazo naphthalimide disperse dyes containing butyric acid and investigation of fastness properties of the dyes on polyester / Kamaladin Gharanjig in COLORATION TECHNOLOGY, Vol. 126, N° 1 (2010)
PermalinkSynthesis and application of some novel antimicrobial monoazonaphthalimide dyes : synthesis and characterisation / Hanieh Shaki in COLORATION TECHNOLOGY, Vol. 128, N° 4 (2012)
PermalinkSynthesis of a novel fluorescent coloured copolymer based on 4-butylthio-1,8-naphthalimide / Bahareh Safabakhsh in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)
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