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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]
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 calciumLe 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 ferIndex. 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
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 3 (04-05/2012) . - p. 216-224[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13902 - Périodique Bibliothèque principale Documentaires Disponible Comparative study on the degradation of a zinc-rich epoxy primer/acrylic polyurethane coating in different simulated atmospheric solutions / Wei Sun in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
[article]
Titre : Comparative study on the degradation of a zinc-rich epoxy primer/acrylic polyurethane coating in different simulated atmospheric solutions Type de document : texte imprimé Auteurs : Wei Sun, Auteur ; Chao Xing, Auteur ; Xiaobo Tang, Auteur ; Yu Zuo, Auteur ; Yuming Tang, Auteur ; Xuhui Zhao, Auteur Année de publication : 2021 Article en page(s) : p. 397–413 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Atmosphère marine
Copolymère uréthane acrylique
Corrosion
Epoxydes
Primaire (revêtement)
Revêtements -- Détérioration
Revêtements organiques
Spectroscopie d'impédance électrochimique
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : The degradation of a zinc-rich epoxy primer/acrylic polyurethane coating system on carbon steel was studied in the simulated marine atmospheric solution (0.05% NaCl), industrial atmospheric solution (0.35% (NH4)2SO4), and marine-industrial atmospheric solution (0.05% NaCl + 0.35% (NH4)2SO4), by electrochemical impedance spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy methods. The influences of the soluble contaminants in the atmospheres, including chloride ions, sulfate ions, and ammonium ions, on the coating failure mechanism were compared and analyzed. The results showed that the degradation speed of the coating system in three simulated atmospheric solutions is in the following order: simulated marine atmosphere > simulated marine-industrial atmosphere > simulated industrial atmosphere. The degradation is mainly related to the permeation rate of the water through the coating. The aggressive ions, basic cations, and the property of the corrosion products also have influences on the degradation process. The alternating temperature environment (45°C 12 h + 25°C 12 h) could increase the degradation speed of the coating and the difference of the speed in the three solutions. Note de contenu : - EXPERIMENTAL : Materials and samples preparation - Corrosion tests and measurements -
- RESULTS AND DISCUSSION : EIS results and the morphology of the coatings - FTIR results and SEM morphology of the coatings
- Table 1 : Coating specifications
- Table 2 : The impedance parameters of the coating sample in 0.05% NaCl solution under alternating hot and cold temperature condition
- Table 3 : The impedance parameters of the coating sample in 0.35% (NH4)2SO4 solution under alternating hot and cold temperature condition
- Table 4: The impedance parameters of the coating sample in 0.05% NaCl + 0.35% (NH4)2SO4 solution under alternating hot and cold temperature conditionDOI : https://doi.org/10.1007/s11998-020-00410-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00410-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35603
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 397–413[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22701 - Périodique Bibliothèque principale Documentaires Disponible Corrosion resistance of functionalized carbon nanotubes enhanced epoxy coatings on sintered NdFeB magnets / Hongyi yang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
[article]
Titre : Corrosion resistance of functionalized carbon nanotubes enhanced epoxy coatings on sintered NdFeB magnets Type de document : texte imprimé Auteurs : Hongyi yang, Auteur ; Liangsong Duan, Auteur ; Pengjie Zhang, Auteur ; Guangqing Xu, Auteur ; Jiewu Cui, Auteur ; Jun Lv, Auteur ; Wei Sun, Auteur ; Bingshan Li, Auteur ; Dongmei Wang, Auteur ; Yucheng Wu, Auteur Année de publication : 2022 Article en page(s) : p. 1317-1329 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Composites à fibres de carbone
Epoxydes
Essais de résilience
Matériaux -- Propriétés fonctionnelles
Nanotubes de carbone à parois multiplesUn nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets :
- le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ;
- le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier.
Revêtements organiques
Surfaces fonctionnelles
TaninsIndex. décimale : 667.9 Revêtements et enduits Résumé : In this work, tannic acid (TA) was employed to modify the surface of multiwall carbon nanotubes (CNTs) to form TCNTs hybrids via noncovalent functionalization to enhance its dispersibility in water. Then, the TCNTs enhanced epoxy coatings were applied on sintered NdFeB magnets by cathodic electrophoretic deposition method for corrosion test. The corrosion resistance of prepared specimens was assessed by electrochemical experiments. The results show that TCNTs hybrids present a more homogeneous distribution in epoxy resin than pristine CNTs and could obviously promote anticorrosion properties of prepared specimens. Within 36-day soaking in 3.5 wt.% NaCl solution, the specimens maintain a high value of |Z|0.01Hz (108 Ω cm2) when the concentration of TCNTs is 2 g/L. When immersed in 3.5 wt.% NaCl solution for 40 days, the Ecorr of specimens shifts to − 0.207 V and Jcorr is about 5.281 × 10−11 A cm−2, which demonstrates superior corrosion resistance. Note de contenu : - EXPERIMENT : Materials - Experimental method - Material characterization and corrosion resistance test
- RESULTS AND DISCUSSION : Characterization of TCNTs hybrids - Characterization of specimens - Corrosion protection mechanism
- Table 1 : Surface chemical composition of CNTs and TCNTs hybrids
- Table 2 : |Z|0.01Hz of specimens after being immersed in 3.5 wt.% NaCl solution for different times
- Table 3 : Electrochemical polarization parameters of different specimens
- Table 4 : Comparation of corrosion protection data of chemical oxidized CNTs enhanced epoxy coatings with this workDOI : https://doi.org/10.1007/s11998-022-00641-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-006241-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38272
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1317-1329[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23672 - Périodique Bibliothèque principale Documentaires Disponible Double-hydrophilic block copolymer as an effective and environmentally friendly inhibitor for phosphate and carbonate scales in cooling water systems / Lei Ling in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 50, N° 1 (01-02/2013)
[article]
Titre : Double-hydrophilic block copolymer as an effective and environmentally friendly inhibitor for phosphate and carbonate scales in cooling water systems Type de document : texte imprimé Auteurs : Lei Ling, Auteur ; Guangqing Liu, Auteur ; Jingyi Huang, Auteur ; Huchuan Wang, Auteur ; Yuming Zhou, Auteur ; Qingzhao Yao, Auteur ; Ke Cao, Auteur ; Yahui Liu, Auteur ; Ying Tu, Auteur ; Xingkai Zhou, Auteur ; Wei Sun, Auteur ; Wendao Wu, Auteur Année de publication : 2013 Article en page(s) : p. 14-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : 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.
Copolymères séquencés
Hydrophilie
Inhibiteurs (chimie)
Phosphate de calcium
Polyéthylène glycol d'AllyloxyIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : In this paper, a series of linear-dendritic block copolymers allyloxy poly(ethylene glycol) polyglycerol (APEG-PG-(OH)n) copolymer, was synthesized by anionic polymerization of glycerol using allyloxy poly(ethylene glycol) (APEG). The polymers were characterized by FT-IR and 1H NMR. The polymers were tested as novel environment-friendly inhibitors for industrial cooling water circulation. The performance of AA/APEG-PG-(OH)n on inhibition of calcium phosphate and calcium carbonate precipitation was studied by static scale inhibition tests. It was shown that AA/APEG-PG-(OH)n exhibited excellent ability to control inorganic minerals, with approximately 99% calcium phosphate inhibition and 85% calcium carbonate inhibition at levels of 4 and 10 mg/L AA/APEG-PG-(OH)n, respectively. The effect on formation of calcium phosphate and calcium carbonate was investigated with combination of scanning electronic microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) analysis, respectively. Note de contenu : - EXPERIMENTAL : Materials and characterization - Measurements - Synthesis - Precipitation conditions
- RESULTS AND DISCUSSION : Characterization of APEG-PG-(OH)n - Characterization of AA/APEG-PG-(OH)n - Effect of inhibitor on calcium phosphate scales - Effect on inhibitor on calcium carbonates scales - Inhibition mechanism toward calcium phosphate and calcium carbonate scales -DOI : 10.3139/113.110225 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17144
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 50, N° 1 (01-02/2013) . - p. 14-20[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14537 - Périodique Bibliothèque principale Documentaires Disponible Fluorescent-tagged double-hydrophilic block copolymer as a green inhibitor for calcium carbonate scales / Guangqing Liu in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 5 (09-10/2012)
[article]
Titre : Fluorescent-tagged double-hydrophilic block copolymer as a green inhibitor for calcium carbonate scales Type de document : texte imprimé Auteurs : Guangqing Liu, Auteur ; Jingyi Huang, Auteur ; Yuming Zhou, Auteur ; Qingzhao Yao, Auteur ; Lei Ling, Auteur ; Peixin Zhang, Auteur ; Huchuan Wang, Auteur ; Ke Cao, Auteur ; Yahui Liu, Auteur ; Wei Sun, Auteur ; Zhengjun Hu, Auteur Année de publication : 2012 Article en page(s) : p. 404-412 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antitartre
Azote
Carbonate de calciumLe 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.
Fluorescence
Phosphates
Polyéthylène glycol d'AllyloxyIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Allyloxy polyethoxy ether (APEG) and succinic anhydride were used to prepare allyloxy polyethoxy carboxylate (APEL). 8-Hydroxy-1,3,6-pyrene trisulfonic acid trisodium salt (PY) reacted with allyl chloride to produce fluorescent monomer 8-allyloxy-1,3,6-pyrene trisulfonic acid trisodium salt (PA). APEL and PA were copolymerized with maleic anhydride (MA) to synthesize the PA tagged, phosphate and nitrogen free CaCO3inhibitor MA-APEL-PA. Structures of PA, APEG, APEL, and MA-APEL-PA were obtained by FT-IR and1H-NMR measurements. The observation shows that the dosage of MA-APEL-PA plays an important role on CaCO3inhibition. The effect on the formation of CaCO3was investigated by a combination of scanning electron microscopy (SEM) and X-ray powder diffraction (XRD) analysis. The relationship between MA-APEL-PA’s fluorescent intensity and its dosage was also studied. Correlation coefficient “r” of MA-APELPA’s fluorescent intensity and its dosage is 0.9997. MA-APEL-PA can be used to measure accurately the polymer consumption on line besides providing excellent CaCO3inhibition. DOI : 10.3139/113.110210 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15877
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 5 (09-10/2012) . - p. 404-412[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14156 - Périodique Bibliothèque principale Documentaires Disponible