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Preparation and characterisation of novel phospholipid cationic liposomes to improve the alkaline hydrolysis and dyeability of polyester fabric / Manal M. El-Zawahri in COLORATION TECHNOLOGY, Vol. 129, N° 3 (06/2013)
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Titre : Preparation and characterisation of novel phospholipid cationic liposomes to improve the alkaline hydrolysis and dyeability of polyester fabric Type de document : texte imprimé Auteurs : Manal M. El-Zawahri, Auteur ; Fatma Abdelghaffar, Auteur Année de publication : 2013 Article en page(s) : p. 193-202 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bases (chimie)
Caractérisation
Fibres polyesters
Hydrolyse
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
Phospholipides
Stéarylamine
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Three novel cationic liposomes were prepared from commercial soybean lecithin (neutral liposome) and stearylamine (cationic liposome) as a catalyst or accelerating agent for the alkaline hydrolysis of polyester fabric. The formation of 1:1, 1:6 and 1:12 cationic liposomes was confirmed by transmission electron microscopy, nitrogen content and Fourier Transform-infrared spectroscopy. Factors affecting the alkaline hydrolysis performance of polyester fabric in the presence and absence of cationic liposomes were investigated. Size measurements of the three cationic liposomes showed that the vesicle size was 27.88 nm for the 1:1 cationic liposome, 15.57 nm for 1:6 and 10 nm for 1:12, in comparison with 50 nm for neutral liposome. The results showed that alkaline hydrolysis in the presence of cationic liposomes improves the hydrophilicity and dyeability of polyester fabric and creates more carboxylic groups on the fabric. The silky polyester fabric was characterised by scanning electron microscopy, tensile strength, elongation at break, crease recovery angle and surface roughness to prove the success of the cationic liposomes as accelerating agents in the alkaline hydrolysis process. The results also indicate that the colour strength of hydrolysed polyester fabric in the presence of cationic liposomes dyed with disperse dye was slightly higher than that obtained in the absence of cationic liposomes and with unhydrolysed fabric. Furthermore, the fastness properties of hydrolysed polyester in the absence and presence of cationic liposomes do not vary. Note de contenu : - MEASUREMENTS AND ANALYSIS : Characterisation of cationic liposomes - Characterisation of hydrolised polyester fabric
- RESULTS AND DISCUSSION : Characterization of liposomes - Characterisation of hydrolysed polyester fabric - Determination of crease recovery angle and surface roughness - Dyeing - Colour fastness propertiesDOI : 10.1111/cote.12024 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12024/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18493
in COLORATION TECHNOLOGY > Vol. 129, N° 3 (06/2013) . - p. 193-202[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15075 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterisation of pigments based on mica coated with rare earth oxides / Shirleny F. Santos in COLORATION TECHNOLOGY, Vol. 127, N° 5 (2011)
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Titre : Preparation and characterisation of pigments based on mica coated with rare earth oxides Type de document : texte imprimé Auteurs : Shirleny F. Santos, Auteur ; Silvia C. A. França, Auteur ; Tsuneharu Ogasawara, Auteur Année de publication : 2011 Article en page(s) : p. 310-313 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Colorants
Hydrolyse
Mica
Muscovite
Pigments nacrés
Terres raresIndex. décimale : 667.2 Colorants et pigments Résumé : Muscovite from a Brazilian natural source was beneficiated using knife mills and an ultrasound treatment. It was possible to achieve mica with a particle size of below 100 and above 45 μm and a thickness of between 0.5 and 1 μm. This product could be used for the synthesis of intensely coloured pearlescent pigments based on muscovite covered with rare earth oxides (CeO2, PrO2 and Ce0.95Pr0.05O2). Pigments were prepared by hydrolysis and characterised by X-ray diffraction, thermal analyses (thermogravimetric/differential thermal) and scanning electron microscopy (MeV). The colour of the resulting pigments was analysed using the CIELab method, including a pearlescence index, and it showed the following colours: mica-CeO2, yellow; mica-PrO2, black; mica-Ce0.95Pr0.05O2, orange. Note de contenu : EXPERIMENTAL : Muscovite DOI : 10.1111/j.1478-4408.2011.00314.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00314.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12174
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Code-barres Cote Support Localisation Section Disponibilité 13324 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterisation of reactive oil tanning agent based on lanolin / Wenkang Han in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 5 (09-10/2020)
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Titre : Preparation and characterisation of reactive oil tanning agent based on lanolin Type de document : texte imprimé Auteurs : Wenkang Han, Auteur ; Yao Tian, Auteur ; Dai Hong, Auteur ; Zhang Zongcai, Auteur Année de publication : 2020 Article en page(s) : p. 244-247 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Caractérisation
ChamoisageLe chamoisage est une technique artisanale qui consiste à fabriquer un type de cuir très souple et de grande qualité, utilisé notamment dans la ganterie. L'atelier où se pratique cette activité est appelé une "chamoiserie", tandis que l'artisan dont c'est la spécialité est un "chamoiseur".
Ce cuir était autrefois fabriqué à partir de peaux de chamois (d'où l'origine du mois "chamoisage") traitées avec de l'huile de poisson, ce qui en faisait un produit rare et cher. Les artisans essayaient donc de fabriquer des cuirs aux qualités approchantes en utilisant la peau d'animaux d'élevage, un tel cuir est alors appelé "peau chamoisée".
Le chamoisage est désormais pratiqué sur les mêmes types de peaux que celles utilisées en mégisserie (agneau, chèvre, vachette, mouton…). Il met en œuvre les mêmes opérations que la mégisserie jusqu'à l'étape de "gonflement". Les peaux sont alors étendues et enduites avec de l'huile de poisson, puis frappées avec un fouloir pour faire pénétrer l'huile. Durant cette étape on expose régulièrement les peaux à l'air (on les "évente"), tout en ajoutant de l'huile.
La dernière opération du chamoisage est le "remaillage" qui consiste à faire "cotonner" la peau en arrachant sa "fleur" avec un couteau qui ne tranche pas.
Un sous-produit du chamoisage, le "dégras", est très recherché par les corroyeurs pour apprêter leurs cuirs.
Il existe une norme française AFNOR qui s'applique aux peaux chamoisées : NF G59-001 de janvier 1981, Cuirs et peaux - Peaux chamoisées - Présentation, dimensions et marquage.
Cuirs et peaux -- Analyse
Cuirs et peaux de lapins
LanolineIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : At present, some commercially available oil tanning agents have poor ability to combine with collagen, after they are used for tanning, massive amounts of oil tanning agent are left in the used tanning bath, which causes the problem of waste of oil tanning agent and environmental pollution. Developing an oil tanning agent which has the ability to combine with collagen, and simplifying the tanning process are the main aims of this dissertation. A new oil tanning agent with lanolin and octadecanol modified by cyanuric chloride is studied. Reaction material ratios were optimised based on the softness of the tanned leather and the eluted amount of oil tanning agent in the tanned leather. The synthesised oil tanning agent was analysed with infrared spectroscopy. The collagen fibre dispersion of the leather tanned with synthesised oil tanning agent was characterised with SEM. Experiments showed that the optimised material ratio was n(lanolin): n (octadecanol): n (cyanuric chloride) =1:1:1. The infrared spectroscopy proves that the experiment successfully added the triazine ring to the lanolin. SEM shows that the collagen fibres of the tanned leather are well dispersed which testifies that this oil tanning agent has the function of dispersing collagen fibres and is a good oil tanning agent. Note de contenu : - MATERIALS AND METHOS : Materials - Preparation of oil tanning agent containing triazine ring - Optimisation of the material ratio - Infrared spectrometric characterisation - Characterisation of fibre dispersion of Rex rabbitskin tanned with oil tanning agent
- RESULTS : Infrared spectroscopy - Fibre dispersion of oil-tanned Rex rabbitskinEn ligne : https://drive.google.com/file/d/15PTSMKE2TfzeAcDcjx7cQrXExQxSatbi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34526
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 5 (09-10/2020) . - p. 244-247[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22289 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterisation of silver or copper-doped TiO2 catalysts and their catalytic activity in dye degradation / Oleksandr Lozovskyi in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)
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Titre : Preparation and characterisation of silver or copper-doped TiO2 catalysts and their catalytic activity in dye degradation Type de document : texte imprimé Auteurs : Oleksandr Lozovskyi, Auteur ; Gönül Gündüz, Auteur ; Meral Dükkanci, Auteur ; Roman prihod'ko, Auteur Année de publication : 2015 Article en page(s) : p. 245-254 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Catalyseurs métalliques
Colorants -- Détérioration
Colorants -- Oxydation
Dioxyde de titaneIndex. décimale : 667.2 Colorants et pigments Résumé : In this study, silver- or copper-doped TiO2–Ce-, TiO2–La-, and commercial TiO2 (P25)-supported catalysts were prepared. The catalysts and supports were characterised by powder X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and nitrogen adsorption studies. UV-light-assisted heterogeneous Fenton-like oxidation of two different-structure dyes (anionic azo dye Orange II, CI Acid Orange 7 and cationic triphenylmethane dye Crystal Violet, CI Basic Violet 3) was investigated over the catalysts. Higher catalytic activity was observed in the oxidation of Orange II than in the oxidation of Crystal Violet. For both dyes, the TiO2–Ce and TiO2–La-supported catalysts, which were in the form of anatase only, gave higher photocatalytic activity than the P25-supported catalysts, which were in the form of anatase and rutile. Complete colour removal was observed during oxidation of Orange II over Cu/TiO2–Ce and Cu/TiO2–La catalysts, whereas the highest degree of decolorisation, 89.3%, was achieved by oxidation of Crystal Violet over Ag/TiO2–Ce. The pH of the solution affected the surface state of the TiO2, thus affecting the photocatalytic degradation of the dyes. The surface area of the catalysts is also a key parameter that influences their photocatalytic activity. It was observed that catalysts having higher surface areas brought about greater dye degradation. Note de contenu : - EXPERIMENTAL STUDY : Materials - Catalyst preparation - Catalyst characterisation
- EXPERIMENTAL PROCEDURE
- RESULTS AND DISCUSSION : Catalyst characterisation - UV-light-assisted heterogeneous Fenton-like degradation of dyesDOI : 10.1111/cote.12148 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12148 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24127
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Code-barres Cote Support Localisation Section Disponibilité 17231 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterisation of sulfonated calix[4]arene and its application in chrome-free tanning / Yongxiang Zhou in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)
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Titre : Preparation and characterisation of sulfonated calix[4]arene and its application in chrome-free tanning Type de document : texte imprimé Auteurs : Yongxiang Zhou, Auteur ; Jianzhong Ma, Auteur ; Dangge Gao ; Wenbo Li ; Yao Zhang Année de publication : 2018 Article en page(s) : p. 200-203 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
CalixarènesUn calixarène est un macrocycle issu de la réaction d'un phénol et d'un aldéhyde. Les calixarènes ont des cavités hydrophobiques qui peuvent inclure des petites molécules ou des ions. Les plus couramment rencontrés sont les calixarènes à 4, 5, 6 et 8 unités phénols. La cavité ainsi formée permet de complexer des ions ou des petites molécules. On peut accéder à des calixarènes hydrosolubles en ajoutant des motifs ioniques par exemple.
Le terme calixarène est l'assemblage des mots calice (pour la forme de vase que certains calixarènes adoptent à l'état solide) et d'hydrocarbure aromatique arène (pour les cycles aromatiques formant les parois de ce vase). Il a été inventé en 1975 par David Gutsche.
Caractérisation
Chrome trivalent -- Recyclage
Composés inorganiques -- Synthèse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de chèvres
SulfonationIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chrome tanning is the main tanning leather method. However, the absorption of chromium is incomplete and residues are present in waste liquors thus polluting the environment. Moreover, Cr3+ will oxidise into carcinogenic Cr6+ under certain conditions. Here we a present a novel chrome-free tannage. The calix[4]arene was synthesized using tert-butyl phenol and formaldehyde as raw materials. The calix[4]arene was then sulfonated with concentrated sulfuric acid. The structure was characterised by FTIR and 1HNMR. The sulfonated calix[4]arene was applied in goatskin tanning. The results showed that the sulfonated calix[4]arene had a tanning effect. The physical and mechanical, properties of the tanned leather were better than those of conventional chrome-tanned leather. Note de contenu : - Materials
- Synthesis of sulfonated calix[4]arene
- Characterisation
- Application and detection methodEn ligne : https://drive.google.com/file/d/1sECRJPhRfQzPKkOT0cIgBaepWYDuuezL/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30903
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Code-barres Cote Support Localisation Section Disponibilité 20126 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterisation of synthetic tannins based on phenol-dimethylolurea resin / K. Venkataboopathy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 5 (09-10/2001)
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