Cationic UV-cured epoxy coating with inhibitor-loaded nanoparticles: photoinitiated cationic polymerization, mechanical properties and corrosion protection of steel / Thien Vuong Nguyen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 1113-1124 Titre : Cationic UV-cured epoxy coating with inhibitor-loaded nanoparticles: photoinitiated cationic polymerization, mechanical properties and corrosion protection of steel Type de document : texte imprimé Auteurs : Thien Vuong Nguyen, Auteur ; Vy Do Truc, Auteur ; Tuan Anh Nguyen, Auteur ; Dai Lam Tran, Auteur Année de publication : 2024 Article en page(s) : p. 1113-1124 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosifs Caractérisation Dioxyde de silicium Enrobage (technologie) Epoxydes Essais de brouillard salin Formulation (Génie chimique) Inhibiteurs (chimie) Métaux -- Revêtements protecteurs Nanoparticules Photoamorceurs (chimie) Polyaddition Revêtements -- Propriétés mécaniques Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : This work aims to explore how the cationic UV-curing technology can be applied for corrosion protection of metals. For this purpose, the cationic UV-curing epoxy coating is prepared on the steel surface, with addition of the inhibitor-loaded nanoparticles. To reveal the effect of Ce-loaded SiO2 nanoparticles on the photoinitiated cationic polymerization of epoxy coating, various measurements have been carried out during the UV irradiation, such as the consumption of photoinitiator (triarylsulfonium hexafluoroantimonate salts, TAS), conversion of epoxy groups, gel fraction, swelling degree and relative hardness of coating samples. To evaluate the effect of Ce-loaded SiO2 nanoparticles on mechanical and anticorrosion properties of UV-cured epoxy coating, the impact strength, abrasion resistance, electrochemical impedance spectroscopy and salt spray tests have been carried out and analyzed. The experimental data indicate that the incorporation of Ce-loaded SiO2 nanoparticles into epoxy matrix reduces both the relative hardness, gel fraction and the conversion of TAS photoinitiator and epoxy groups. However, the presence of these nanoparticles increases both impact strength, abrasion resistance and anticorrosion performance of the cationic UV-cured epoxy coating. Note de contenu : - EXPERIMENTAL SECTION : Materials - Fabrication of cationic UV-curing epoxy coatings - Coating characterization - RESULTS AND DISCUSSIONS : UV-initiated cationic polymerization of epoxy coating - Morphology and mechanical properties of cationic UV-cured epoxy coatings - Effect of SiO2@Ce3+ nanoparticles on the corrosion protection of UV-cured epoxy coating - Salt spray test - Table 1 : Coating formulations of the cationic UV-curing epoxy coatings DOI : https://doi.org/10.1007/s11998-023-00878-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00878-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41080 [article]

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Co-blending, phosphate inhibitors for sustainable, low-cost corrosion control / Ella Newington in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4676 (08/2022)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4676 (08/2022) . - p. 27-29 Titre : Co-blending, phosphate inhibitors for sustainable, low-cost corrosion control Type de document : texte imprimé Auteurs : Ella Newington, Auteur Année de publication : 2022 Article en page(s) : p. 27-29 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Coût -- Contrôle Essais de brouillard salin Inhibiteurs (chimie) Mélanges (chimie) Métaux -- Revêtements protecteurs Phosphates Primaire (revêtement) Index. décimale : 667.9 Revêtements et enduits Résumé : The author discusses how, with independent research and industry testing, Intelli-ion works synergistically with phosphate-based systems to offer environmental and cost benefits. As professionals working within the coatings industry, we are all acutely aware of the issues that corrosion poses and want to provide our customers and end-users with the best quality products to tackle this US$2,2trn global issue'. Anti corrosion coatings have become a necessity for industries to safeguard the huge investments they make in terms of money, property and safety of workers. Whether coating to protect pipelines, aeroplanes or computer gadgets - customers are united in their battle against corrosion ! Historically, some of the most effective corrosion inhibitors have been based on chromium. However, these chemistries are currently being phased out globally - leaving a gap in the market for a highly effective inhibitor that is non-toxic and non-carcinogenic. Following strong R&D efforts and lengthy extended testing, many coatings companies have turned to phosphate-based systems. This article highlights a step-change alternative that can save 10-30 % on the cost of anti-corrosives as well as offering customers more sustainable coatings that require no hazard warning label. Note de contenu : - WHY PHOSPHATES ARE POPULAR - WHY PHOSPHATE "CO-BLENDS" ARE BETTER : Innovative and trusted technology working together - Removal of toxic warning labels from packaging - Anticorrosive costs savings - EVIDENCE OF INTELLI-ION & PHOSPHATE COMPATIBILITY : Independent academic research at Swansea University wales - Industry-standard salt-spray testing - Fig. 1-3 : Depict the protection mechanism of a co-blended primer coating following the detection of corrosive ions - Fig. 4-5 : Demonstrate Dr. Phit Ansett's independent research aimed at understanding the relationship between Intelli-ion and ZnP - Fig. 6-7 : Demonstrate industry standard salt spray testing (ASTM 8117) of phosphate-based systems left vs Intelli-ion En ligne : https://drive.google.com/file/d/1nMSpxN4McBeWLY7w5KPpH064-95ReTan/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37870 [article]

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A combination of pyridine-2, 4-dicarboxylic acid diethyl ester and resveratrol stabilizes hypoxia-;inducible factor 1-alpha and improves hair density in female volunteers / Franck Juchaux in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 2 (04/2020)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 2 (04/2020) . - p. 167-173 Titre : A combination of pyridine-2, 4-dicarboxylic acid diethyl ester and resveratrol stabilizes hypoxia-;inducible factor 1-alpha and improves hair density in female volunteers Type de document : texte imprimé Auteurs : Franck Juchaux, Auteur ; T. Sellathurai, Auteur ; V. Perrault, Auteur ; F. Boirre, Auteur ; P. Delannoy, Auteur ; K. Bakkar, Auteur ; J. Albaud, Auteur ; A. Gueniche, Auteur ; A. Cheniti, Auteur ; S. Dal Belo, Auteur ; L. Souverain, Auteur ; M. Le Balch, Auteur ; S. Commo, Auteur ; S. Thibaut, Auteur ; J. F. Michelet, Auteur Année de publication : 2020 Article en page(s) : p. 167-173 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alopécie Antioxydants Cellules -- Cultures et milieux de culture Cheveux -- Croissance Cheveux -- Soins et hygiène Elisa, Test Le test ELISA est une méthode de laboratoire qualifiée d'immuno-enzymatique. Il s'agit d'un test immunologique, car il a pour principal objectif de mettre en évidence la présence d'anticorps ou d'antigènes spécifiques à une pathologie, dans un échantillon de sang. Cet examen utilise une protéine appelée enzyme, qui va se fixer à certains constituants spécifiques de la maladie, et par repérage et quantification de cette enzyme, la maladie pourra être affirmée, ainsi que son intensité évaluée. Génétique Inhibiteurs (chimie) Prolyl hydroxylase Protéomique La protéomique désigne la science qui étudie les protéomes, c'est-à-dire l'ensemble des protéines d'une cellule, d'un organite, d'un tissu, d'un organe ou d'un organisme à un moment donné et sous des conditions données. Dans la pratique, la protéomique s'attache à identifier de manière globale les protéines extraites d'une culture cellulaire, d'un tissu ou d'un fluide biologique, leur localisation dans les compartiments cellulaires, leurs éventuelles modifications post-traductionnelles ainsi que leur quantité. Elle permet de quantifier les variations de leur taux d'expression en fonction du temps, de leur environnement, de leur état de développement, de leur état physiologique et pathologique, de l'espèce d'origine. Elle étudie aussi les interactions que les protéines ont avec d'autres protéines, avec l'ADN ou l'ARN, ou d'autres substances. La protéomique fonctionnelle étudie les fonctions de chaque protéine. La protéomique étudie enfin la structure primaire, secondaire et tertiaire des protéines. (Wikipedia) Index. décimale : 668.5 Parfums et cosmétiques Résumé : - OBJECTIVE : The aim of this study was first to demonstrate that a combination of pyridine-2, 4-dicarboxylic acid diethyl ester and resveratrol could synergize in vitro on biological pathways associated with hair growth and then to demonstrate the benefit on hair density in a clinical study. - METHODS : The effects of pyridine-2, 4-dicarboxylic acid diethyl ester and resveratrol directly on the hypoxic inducible factor-1α protein (HIF-1α) and related genes expression were demonstrated on keratinocytes in culture in vitro using western-blot analysis and real time quantitative polymerase chain reaction analysis. The effect of resveratrol against oxidative stress induced by hydrogen peroxide treatment was studied in hair follicle and hair matrix cells in vitro using the sensitive probe Dichloro-dihydro-fluorescein diacetate (DCFH-DA). Finally, a randomized clinical study on hair density was conducted on 79 Caucasian female subjects to assess the effect of this combination of actives. - RESULTS : Pyridine-2, 4-dicarboxylic acid diethyl ester and resveratrol stabilized HIF-1a protein and increased the expression of HIF-1α target genes. Resveratrol significantly reduced the oxygen peroxide-induced oxidative stress generated in hair follicle and hair matrix cells. The clinical study showed that a topical treatment with the combination significantly increased the hair density on women from 1.5 months. - CONCLUSION : In addition to the antioxidant properties of resveratrol, the association of pyridine-2, 4-dicarboxylic acid diethyl ester and resveratrol revealed a synergistic effect on the HIF-1α pathway. The results of the clinical study confirmed the importance of such a combination to increase the hair density. Note de contenu : - MATERIALS AND METHODS : Actives - Keratinocyte culture - RT-qPCR and Wester blot analysis - Isolation and culture of human hair follicles and matrix cells - Generation of reactive oxygen species and protection by resveratrol in hair follicles and hair matrix cells - Clinical study - RESULTS : Stimulation of the HIF-1 α pathway - Protection towards oxidative stress in hair follicles and matrix cells - Clinical efficacy on women hair density DOI : https://doi.org/10.1111/ics.12600 En ligne : https://drive.google.com/file/d/1D24bJMb-0_qw2Y1eygUKJy_YcC5uNViW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34507 [article]

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Complete inhibition of hexavalent chromium formation from chrome-tanned leather with combined inhibitors / Koki Ogata in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 1 (01-02/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 1 (01-02/2017) . - p. 27-32 Titre : Complete inhibition of hexavalent chromium formation from chrome-tanned leather with combined inhibitors Type de document : texte imprimé Auteurs : Koki Ogata, Auteur ; Yuki Kumazawa, Auteur ; Yoichi Koyama, Auteur ; Keiji Yoshimura, Auteur ; Koji Takahashi, Auteur Année de publication : 2017 Article en page(s) : p. 27-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chrome hexavalent Cuir -- Teneur en chrome hexavalent Extraction (chimie) Inhibiteurs (chimie) Oxydoréduction Phosphate de potassium Le phosphate de potassium est le nom générique pour les sels formés des ions phosphate et potassium résultant de l'attaque de l'hydroxyde de potassium (KOH ou potasse, base) par l'acide phosphorique. Statistique Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Hexavalent chromium (Cr6+) is formed in chrome-tanned leather due to oxidation of trivalent chromium (Cr3+) under certain conditions and may induce dermatitis and cancer. Specifically, significant amounts of Cr6+ are generated during the heat-ageing process by pre-heating at 80°C for 24 hours in accordance with ISO rnethod17075, promoting the formation of Cr6+ from Cr3+ in chrome-tanned leather. Thus, inhibiting or minimizing the production of Cr6+ is needed badly. A previous report demonstrated that 0.1mol/L potassium phosphate buffer (P-buffer ; pH5.5) was highly efficient as an extractant for the measurement of Cr6+ from chrome-tanned leather as compared with P-buffer (pH8.0). The present report describes efforts to control the redox behaviour of Cr3+ with the goal of inhibiting the formation of Cr6+ in chrome-tanned leather using a low-molecular weight (At 9,400) collagen peptide (CP-9), 2, 6-di-t-butyl-4-methylphenol (BHT), 3(2)-t-butyl-4-hydroxyanisole (BHA), and ascorbic acid (AsA) as inhibitors, even with heat-aged leather. Chrome-tanned leather was treated with the inhibitors, and the resulting leather samples were extracted with P-buffer (pH5.5) to determine the amount of Cr6+ in the extracts. The results showed that CP-treatment significantly reduced the amount of Cr6+ formed, probably due to a combination of chelation of CP on the Cr3+ complex, quenching of reactive oxygen, and radical scavenging. The BHT, and BHA, and AsA treatments also reduced the amount of Cr6+ formed, probably due la scavenging radicals from the oxidative products of the fatliquoring agent and alterations in the reducing conditions. However, treatment with any of the inhibitors individually did not cause complete inhibition of Cr3+ oxidation. Therefore, the action of the combined inhibitors was investigated. The results demonstrated that treatment with BHA + CP and with BHA + AsA produced a synergistic reduction in Cr6+ production. Use of BHA + AsA + CP completely inhibited the formation of Cr6+ from heat-aged leather samples. Note de contenu : - Materials - Treatment of the leather sample with inhibitor - Extraction of Cr from the treated leather sample - Analytical methods - Statistical analysis En ligne : https://drive.google.com/file/d/1iYCWrvmmpRnUAnE4Xf8BR9QBsfNnBDPz/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27986 [article]

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A concise review on corrosion inhibitors : types, mechanisms and electrochemical evaluation studies / I. A. Wonnie Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 1 (01/2022) . - p. 241–268 Titre : A concise review on corrosion inhibitors : types, mechanisms and electrochemical evaluation studies Type de document : texte imprimé Auteurs : I. A. Wonnie Ma, Auteur ; Sh. Ammar, Auteur ; Sachin S. A. Kumar, Auteur ; S. Ramesh, Auteur Année de publication : 2022 Article en page(s) : p. 241–268 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Electrochimie Inhibiteurs (chimie) Index. décimale : 667.9 Revêtements et enduits Résumé : This article presents a concise review of different types of inhibitors for corrosion protection on metal surfaces. Corrosion inhibitors can be of different types, which include organic, inorganic and hybrid (organic/inorganic) materials. They are also classified as cathodic, anodic and/or mixed-type inhibitors, which are based on the active inhibitor molecules that retard the corrosion process. Silicate, nitrites, molybdates, phosphates, zinc salt and cerium salt are widely used as inorganic inhibitors. Many organic compounds have been widely utilized as inhibitors. Corrosion protection will be obtained by various mechanisms such as physisorption, chemisorption, barrier protection, thin-film formation and electrochemical processes. The type of inhibitors, inhibition mechanism and the evaluation methods have been explained in detail. Note de contenu : - TYPE OF CORROSION INHIBITORS : Inorganic inhibitors - Organic inhibitor - Hybrid organic-inorganic inhibitor INHIBITION MECHANISM OF CORROSION INHIBITORS : Adsorptive interaction of corrosion inhibitors on the metal surface - Inhibition of electrochemical process - Electrochemical evaluation for corrosion inhibitor studies - Table 1 Type of organic inhibitors and inhibition efficiency - Table 2 Inhibition efficiency of some corrosion inhibitors evaluated by electrochemical measurement deployed for various type of metal corrosion reduction DOI : https://doi.org/10.1007/s11998-021-00547-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00547-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37156 [article]

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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)

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Effet revitalisant du guggul versus CoQ10 / Karl-Werner Quirin in EXPRESSION COSMETIQUE, N° Hors série (11/2018)  

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Enhancing curing of UV black coating through formulation efficiency / Pradeep S. Verma in PAINTINDIA, Vol. LXX, N° 2 (02/2020)  

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Environmentally friendly Zn–Al layered double hydroxide (LDH)-based sol–gel corrosion protection coatings on AA 2024-T3 / R. Subasri in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)  

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Finding the right cure / Stephen Davidson in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4451 (04/2002)

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Function and color made to measure / Jan Stadermann in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 9 (09/2013)

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A glabridin-enriched licorice extract demonstrates multifunction skin benefits in vitro / Avani Mainkar in SOFW JOURNAL, Vol. 148, N° 12 (12/2022)  

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Improved adhesion / Marko Soltau in EUROPEAN COATINGS JOURNAL (ECJ), (05/2023)  

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Inflamm'aging : la nouvelle théorie sur le vieillissement de la peau / Philippe Moussou in EXPRESSION COSMETIQUE, N° Hors série (12/2012)  

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Influence of heat treatment on the performance of polymers as gypsum (CaSO4 · 2H2O) scale inhibitors for industrial water applications / Zahid Amjad in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)

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Influence of surfactants on the performance of calcium phosphate scale inhibitors / Zahid Amjad in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 1/2010 (01-02/2011)

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Inhibition of human neutrophil elastase by wheat ceramides / V. Bizot-Foulon in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 17, N° 6 (12/1995)  

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Inhibitive effects of some low-toxicity mildew inhibitors on wet blue / Liu Yan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 4 (07-08/2005)  

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Inhibitory effect of protein filling agent from bovine hair on the oxidation of Cr(III) / Yue Yu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 12 (12/2015)  

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Inhibitory mechanism of hexavalent chromium formation in chrome-tanned leather with combined inhibitors / Koki Ogata in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)  

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