Acrylic acid-allylpolyethoxy carboxylate copolymer dispersant for calcium carbonate and iron(III) hydroxide scales in cooling water systems / Guangqing Liu in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 3 (04-05/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 3 (04-05/2012) . - p. 216-224 Titre : Acrylic acid-allylpolyethoxy carboxylate copolymer dispersant for calcium carbonate and iron(III) hydroxide scales in cooling water systems Type de document : texte imprimé Auteurs : Guangqing Liu, Auteur ; Yuming Zhou, Auteur ; Qingzhao Yao, Auteur ; Lei Ling, Auteur ; Peixin Zhang, Auteur ; Change Fu, Auteur ; Wendao Wu, Auteur ; Wei Sun, Auteur ; Zhengjun Hu, Auteur Année de publication : 2012 Article en page(s) : p. 216-224 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents dispersants (chimie) Antitartre Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole. C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots. Carboxylate Circuits de refroidissement Copolymère acrylique alkylpolyéthoxy carboxylate Hydroxydes de fer Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A novel environmentally friendly type of calcium carbonate and iron(III) scale inhibitor (ALn) was synthesized. The anti-scale property of the Acrylic acid-allylpolyethoxy carboxylate copolymer (AA-APELn or ALn) towards CaCO3and iron(III) in the artificial cooling water was studied through static scale inhibition tests. The observation shows that both calcium carbonate and iron(III) inhibition increase with increasing the degree of polymerization of ALn from 5 to 15, and the dosage of ALn plays an important role on calcium carbonate and iron(III)-inhibition. The effect on formation of CaCO3was investigated with a combination of scanning electronic microscopy (SEM), Transmission electron microscopy (TEM), X-ray powder diffraction (XRD) analysis and Fourier transform infrared spectrometer, respectively. The results showed that the ALn copolymer not only influences calcium carbonate crystal morphology and crystal size but also the crystallinity. The crystallization of CaCO3in the absence of inhibitor was rhombohedral calcite crystal, whereas a mixture of calcite with vaterite crystals was found in the presence of the ALn copolymer. Inhibition mechanism is proposed that the interactions between calcium or iron ions and polyethylene glycol (PEG) are the fundamental impetus to restrain the formation of the scale in cooling water systems. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14901 [article]

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Investigation into the reaction of reactive dyes with carboxylate salts and the application of carboxylate-modified reactive dyes to cotton / David M. Lewis in COLORATION TECHNOLOGY, Vol. 138, N° 1 (02/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 1 (02/2022) . - p. 58-70 Titre : Investigation into the reaction of reactive dyes with carboxylate salts and the application of carboxylate-modified reactive dyes to cotton Type de document : texte imprimé Auteurs : David M. Lewis, Auteur ; Peter J. Broadbent, Auteur ; Chris M. Carr, Auteur ; Wei D. He, Auteur Année de publication : 2022 Article en page(s) : p. 58-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Carboxylate Citrate de sodium Colorants -- Synthèse Colorants réactifs Coton Le 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). Fixation (chimie) Formiate de sodium Impression jet d'encre Impression sur étoffes Orange (couleur) Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Ink-jet printing of cellulosic fabrics with reactive dyes typically requires that the fabric is pretreated with alkali, prior to printing, to facilitate efficient fixation of the dye. In this paper we evaluate the use of sodium formate and other carboxylate salts as a neutral (pH 6.5) pretreatment process. The thickened, prepared-for-print pad liquor contained at least 50 gdm−3 of the selected carboxylate salt and was applied to the cotton fabrics by a pad-dry procedure. The fabric was then ink-jet printed with reactive dye inks, followed by standard steaming and washing-off processes. The pH of the carboxylate salt pretreatment was 6.5 and the aqueous extracts from the print fabrics at the end of the steaming process remained at pH 6.5. It was observed that even at pH 6.5, in the presence of selected carboxylates, significant reactive dye fixation could be achieved on a cotton substrate, whereas in the absence of the carboxylate, very little or even zero fixation was achieved. Infrared and capillary electrophoresis analyses of model reactions of reactive dyes with the carboxylate salts indicated that reactive ester residues were formed, and which subsequently promoted reaction with the cellulosic substrates. In addition to improving reactive dye fixation in ink-jet printing, the carboxylate-modified dyes were also demonstrated to improve long-liquor dyeing properties on cotton substrates. As an extension of this carboxylate-based printing process, the incorporation of lithium acetate (100 gdm−3) into the ink formulation was further studied and it was demonstrated that the necessity for a preparative pretreatment process could be eliminated. Note de contenu : - EXPERIMENTAL AND METHODS : Materials - Synthesis of a model SES dye - Model SES dye reaction with sodium formate - Model SES dye reaction with sodium citrate - Modification of commercial reactive dyes with sodium formate and sodium citrate - Cotton fabric preparation for subsequent ink- jet printing- Laboratory- ased, ink-jet printing application - Long-liquor dyeing Fixation - FTIR analysis - CE analysis of reactive dyes - RESULTS AND DISCUSSION : Activator evaluation - Ink-jet prints showing the effect of activators - "All-in" system for ink-jet printing with reactive dye-based inks - FTIR analysis of reactive dyes modified with carboxylates - CE analysis of selected commercially available reactive dyes and their carboxylate derivatives - Table 1 : Capillary electrophoresis (CE) analysis of formate- and citrate- modified Remazol Red RB and Remazol Brilliant Orange 3R reactive - Table 2 : Capillary electrophoresis (CE) analysis of formate- modified Cibacron Blue FR and Cibacron Red FB reactive dyes - Table 3 : Fixation and colour yield values following long- liquor dye application of 1%- 2% owf Remazol Red RB dye and carboxylate dye derivatives to cotton fabric - Table 4 : Fixation and colour yield values following long- liquor dye application of 1%- 2% owf Cibacron Red FB dye and carboxylate dye derivatives to cotton fabric DOI : https://doi.org/10.1111/cote.12571 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12571 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37499 [article]

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Ionically activated viscose fibers - properties and applications / Roland Scholz in CHEMICAL FIBERS INTERNATIONAL, Vol. 64, N° 1 (03/2014)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 64, N° 1 (03/2014) . - p. 29-31 Titre : Ionically activated viscose fibers - properties and applications Type de document : texte imprimé Auteurs : Roland Scholz, Auteur ; Nina Köhne, Auteur Année de publication : 2014 Article en page(s) : p. 29-31 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anions Carboxylate Cations Fibres textiles synthétiques Ions métalliques Ions, Echange d' Polyélectrolytes Résines échangeuses d'ions Viscose Index. décimale : 677.4 Textiles artificiels Résumé : Ion exchange is used in a wide range of technical processes and in private households. Typical applications are deionization and softening of water, as well as removal of heavy metal ions from aqueous solutions. Mostly ion exchange resin beads are employed. Fibers with ion exchange properties provide characteristics which extend the range of application for ion exchange. En ligne : https://drive.google.com/file/d/1VeQy1sRjfo1uwFsL-7JcJdIwhEZBg2FZ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20957 [article]

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Recovery of chromium(III) ions from aqueous solution by carboxylate functionalized wood fibres / Yin Zhonglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 3 (05-06/2015)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 3 (05-06/2015) . - p. 101-106 Titre : Recovery of chromium(III) ions from aqueous solution by carboxylate functionalized wood fibres Type de document : texte imprimé Auteurs : Yin Zhonglong, Auteur ; Chen Baihua, Auteur ; Chen Min, Auteur ; Hu Sheng, Auteur ; Cheng Haiming, Auteur Année de publication : 2015 Article en page(s) : p. 101-106 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique Adsorption Carboxylate Chrome trivalent Eaux usées -- Recyclage Greffage (chimie) Laine Récupération (Déchets, etc.) Solutions aqueuses (chimie) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The application of wool fibres for recovery of heavy metal ions is equivalent to the use of one waste to clean-up of another. A carboxylate functionalized wool fibre (PAA-g-Wool) was prepared by grafting poly(acrylic acid) onto the surface of wool fibre in the presence of potassium permanganate and oxalic acid as a redox initiator system. The graft percentage was 80.2%. The PAA-g-Wool adsorbent was applied to absorb chromium(III) from aqueous solutions in a batchwise manner. The optimum pH for recovery of chromium(III) by PAA-g-Wool was found to be 6.0. Kinetic studies show that the sorption process agrees with the pseudo-second-order kinetic model, with the correlation coefficient (R2) more than 0.99. The adsorption equilibrium of chromium(III) was well defined by the Langmuir isotherm equation, and the adsorption capacity was found to be 95.78mg/g calculated by the Langmuir isotherm equation. After recycling for 5 times, the adsorption capacity of PAA-g-Wool to chromium ions was still maintained at 90%. The PAA-g-Wool could recover 97.1% of chromium(III) ions in the tannery wastewater. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of PAA-g-wool fibres - FTIR analysis - SEM analysis - Batch adsorption experiments - Effect of initial pH - Effect of contact time - Effect of initial concentration of chromium (III) - Desorption and recycling experiments - Treatment of tannery wastewater - RESULTS AND DISCUSSION : Preparation and characterization of PAA-g-wool - Effect of pH - Adsorption kinetics - Adsorption isotherms - Recycling adsorption - Treatment of tannery wastewater En ligne : https://drive.google.com/file/d/14Bf5R3-VSJ7uyRn6R4GbQBB8Zk8r-r-s/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24252 [article]

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Surface-fragmenting, self-polishing, tin-free antifouling coatings / Ping-Lin Kuo in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 893 (06/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 893 (06/1999) . - p. 77-83 Titre : Surface-fragmenting, self-polishing, tin-free antifouling coatings Type de document : texte imprimé Auteurs : Ping-Lin Kuo, Auteur ; Teng-Fu Chuang, Auteur ; Hsing-Lung Wang, Auteur Année de publication : 1999 Article en page(s) : p. 77-83 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carboxylate Copolymères réticulés Cuivre -- Composés organiques Fragmentation Hydrolyse Liants Polissage Revêtements -- Additifs Revêtements antisalissures:Peinture antisalissures Sels Spectrométrie infrarouge Spectroscopie de la résonance magnétique nucléaire Index. décimale : 667.9 Revêtements et enduits Résumé : Surface-fragmenting types of self-polishing tin-free resins were characterized by IR and NMR and dernonstrated the successful synthesis of cupric carboxylate. According to the IR, 2H-NMR and 13C-NMR measurements, it is clear that the unsaturated double bonds present in the resins changed into other new bonds after drying in a manner similar to alkyd resins. These resins were used as binders to prepare antifouling paints. Scanning electron microscopy (SEM), rotary tests, raft tests, and ship tests were used to investigate the self-polishing phenomena and the antifouling ability of this type of antifouling paint. The SEM photographs obtained from the paint surfaces demonstrate self-polishing phenomena. From the rotary tests, the polishing rates of paints were measured as 10μ ∼ 5.7μ/month. The results from the raft tests show that all of the paints exhibit excellent antifouling ability and are about 80 ∼ 90% as effective as the conventional tin-containing anti fouling paints. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17878 [article]

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Synthesis of highly carboxylate acrylic resins for leather impregnation / Lluis Ollé in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 1 (01/2012)  

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The reaction of sodium cyanate with wool and nylon and its effect on subsequent dyeing / David Lewis in COLORATION TECHNOLOGY, Vol. 130, N° 2 (04/2014)  

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