Characteristics, antibacterial activity, and antibiofilm performance of a polysiloxane coating filled with organically modified Cu2O / Phi Hung Dao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 1949-1961 Titre : Characteristics, antibacterial activity, and antibiofilm performance of a polysiloxane coating filled with organically modified Cu2O Type de document : texte imprimé Auteurs : Phi Hung Dao, Auteur ; Anh Hiep Nguyen, Auteur ; Thanh Thuy Tran, Auteur ; Thuy Chinh Nguyen, Auteur ; Thi Thu Trang Nguyen, Auteur ; Xuan Thai Nguyen, Auteur ; Thi Mai Tran, Auteur ; An Quan Vo, Auteur ; Huu Nghi Do, Auteur ; Minh Quan Pham, Auteur ; Ngoc Nhiem Dao, Auteur ; Ngoc Tan Nguyen, Auteur ; Hoang Nghia Trinh, Auteur ; Hoang Thai, Auteur Année de publication : 2023 Article en page(s) : p. 1949-1961 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Biofilms Eau de mer Inhibition microbienne Nanoparticules Oxyde de cuivre Revêtements -- Propriétés mécaniques Revêtements -- Propriétés physiques Revêtements antisalissures:Peinture antisalissures Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Test d'immersion Index. décimale : 667.9 Revêtements et enduits Résumé : The effects of Cu2O nanoparticles (Cu2O NPs) modified with 3-(trimethoxysilyl)propyl methacrylate (TMSPM) (m-Cu2O NPs) on the properties of a polysiloxane (PS) coating were investigated. The organic surface modifications improved the antimicrobial activity of the Cu2O NPs and their dispersion in a PS matrix. Due to the broad dispersion of the m-Cu2O NPs, the PS/m-Cu2O coating exhibited better mechanical properties and better thermal stability than unmodified Cu2O (u-Cu2O) coatings. The onset temperature of PS/m-Cu2O was 24 °C higher than that of the neat PS coating and 11 °C higher than that of the PS/u-Cu2O coating. The PS/m-Cu2O coating exhibited high antibacterial activity for sulfate-reducing bacterial strains, but the PS/m-Cu2O coating showed slight bacterial inhibition of Pseudomonas stutzeri B27 bacteria (which were isolated under seawater at Phu Quoc Island, Kien Giang Province, Vietnam). Biofilm inhibition by the PS coatings with and without the m-Cu2O NPs was also tested with a natural seawater immersion test. After a 60-day test, the biofilm formed on the PS coating surface was ten times thicker than that on the PS/m-Cu2O coating. Fourier transform infrared spectroscopy (FTIR) data and the surface properties of the coating indicated that immersion in natural seawater insignificantly affected the functional groups of the coating but had a substantial influence on the smoothness of the coating, which made the surface of the coating more hydrophilic. These results suggested that the PS/m-Cu2O could be used as an antifouling coating for the marine industry. Note de contenu : - EXPERIMENTAL : Materials - Surface modification of Cu2O nanoparticles - Preparation of polysiloxane coatings containing m-Cu2O NPs - Preparation of antifouling paint coatings for biofilm resistance by immersion in natural seawater - Immersion of the investigated coatings in natural seawater - Analyses - RESULTS AND DISCUSSION : Effect of organically modified Cu2O NPs on the mechanical properties of the polysiloxane coatings - Thermal behaviors of polysiloxane coatings containing Cu2O NPs - Morphologies of the polysiloxane coatings containing m-Cu2O NPs - Antibacterial activities of polysiloxane coatings containing m-Cu2O NPs - Investigation of biofilm inhibition by the polysiloxane coatings containing m-Cu2O NPs with immersion in natural seawater in the laboratory - Table 1 : Characteristics and qualities of the seawater at the testing site - Table 2 : Physicomechanical properties of the PS/Cu2O NP coatings - Table 3 : Antimicrobial activities of u-Cu2O NPs and m-Cu2O NPs - Table 4 : Antibacterial activities of the PS coatings for Pseudomonas stutzeri B27 bacteria - Table 5 : Antibacterial activities of the PS coatings for sulfate-reducing bacteria DOI : https://doi.org/10.1007/s11998-023-00789-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00789-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40173 [article]

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Effects of hydrotalcite intercalated with corrosion inhibitor on cathodic disbonding of epoxy coatings / Thi Xuan Hang To in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 2 (03/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 2 (03/2015) . - p. 375-383 Titre : Effects of hydrotalcite intercalated with corrosion inhibitor on cathodic disbonding of epoxy coatings Type de document : texte imprimé Auteurs : Thi Xuan Hang To, Auteur ; Nguyen Thuy Duong, Auteur ; Anh Truc Trinh, Auteur ; Hoang Thai, Auteur ; Dinh Thi Mai Thanh, Auteur ; Siriporn Daopiset, Auteur ; Anothai Boonplean, Auteur Année de publication : 2015 Article en page(s) : p. 375-383 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Caractérisation Décollement cathodique (revêtement) Epoxydes Essais d'adhésion Essais de brouillard salin Hydrotalcites Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, zinc aluminum hydrotalcite intercalated with 2-benzothiazolylthio-succinic acid (BTSA) as a container of corrosion inhibitor was prepared and incorporated in an epoxy coating. The HT-BTSA obtained was characterized using infrared spectroscopy and X-ray diffraction. BTSA release from HT-BTSA in 0.5 M NaCl solution was investigated using UV–Vis spectroscopy. The corrosion protection performance of the epoxy coating containing HT-BTSA was evaluated and compared to the pure epoxy coating and the epoxy coating containing HT by cathodic disbonding test, electrochemical impedance spectroscopy, salt spray test, and adhesion measurement. It was shown that the BTSA was intercalated in hydrotalcite and its loading was about 33.5%. The BTSA release from HT-BTSA increased with the pH of the NaCl solution. It was also shown that the presence of HT or HT-BTSA in epoxy coating improved the resistance to cathodic disbonding and the adhesion of the epoxy coating. Corrosion protection performance of epoxy coating containing HT-BTSA was higher than that of epoxy coating containing HT. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of hydrotalcite - Preparation of hydrotalcite intercalated with BTSA - Preparation of epoxy coatings - Analytical characterizations - BTSA release from HT-BTSA - Electrochemical characterization - Salt spray test - Adhesion measurement - RESULTS AND DISCUSSION : Characterization of HT-BTSA - Release of BTSA from HT-BTSA - Cathodic disbonding test - Salt spray test - Adhesion measurements DOI : 10.1007/s11998-014-9642-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9642-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23661 [article]

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Synthesis of 3-glycidoxypropyltrimethoxysilane modified hydrotalcite bearing molybdate as corrosion inhibitor for waterborne epoxy coating / Thi Xuan Hang To in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 5 (09/2016) . - p. 805-813 Titre : Synthesis of 3-glycidoxypropyltrimethoxysilane modified hydrotalcite bearing molybdate as corrosion inhibitor for waterborne epoxy coating Type de document : texte imprimé Auteurs : Thi Xuan Hang To, Auteur ; Nguyen Tuan Anh, Auteur ; Anh Truc Trinh, Auteur ; Bui Van Truoc, Auteur ; Hoang Thai, Auteur ; Dinh Thi Mai Thanh, Auteur ; Siriporn Daopiset, Auteur Année de publication : 2016 Article en page(s) : p. 805-813 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Epoxydes Hydrotalcites Molybdate Un molybdate est une espèce chimique qui contient un oxyanion possédant un atome de molybdène à son nombre d'oxydation maximum de +6. Le molybdène peut former une grande variété d'oxyanions, qui peuvent se présenter comme des structures discrètes ou bien des structures étendues polymérisées, ces dernières ne se trouvant qu'à l'état solide. Les oxyanions de molybdène discrets vont du MoO42–, qu'on trouve par exemple dans le molybdate de sodium Na2MoO4, jusqu'aux très grandes structures telles que le bleu de molybdène [Mo154O462H14·70H2O]14− dit « hétéropolymolybdène ». Parmi les éléments du groupe 6 du tableau périodique, le molybdène a un comportement voisin de celui du tungstène1 mais très différent de celui du chrome, qui ne forme que les chromates CrO42–, Cr2O72–, Cr3O102– et Cr4O132– qui ont tous une géométrie tétraédrique. Revêtements en phase aqueuse:Peinture en phase aqueuse Silanes Index. décimale : 667.9 Revêtements et enduits Résumé : Zinc aluminum hydrotalcite intercalated with molybdate (HTM) and modified by 3-glycidoxypropyltrimethoxysilane (HTM-GS) was prepared and incorporated into a waterborne epoxy coating. The synthesized HTM-GS was characterized by FTIR, XRD, SEM, and TEM. The inhibitive action of HTM-GS on carbon steel was evaluated using electrochemical measurement and SEM/EDX analysis. The corrosion protection of the waterborne epoxy coating containing HTM-GS was evaluated and compared to that of the pure waterborne epoxy coating and the waterborne epoxy coating containing HTM by salt spray test and adhesion measurement. It was shown that the molybdate was intercalated in the hydrotalcite structure and the molybdate contents in HTM and HTM-GS were 16.0 and 13.2 wt%, respectively. The polarization curves obtained on the carbon steel electrode showed that HTM and HTM-GS are anodic corrosion inhibitors, and their inhibition efficiencies at concentration of 3 g/l were 92.0 and 94.7%, respectively. Additionally, HTM and HTM-GS at concentration of 0.5 wt% improved corrosion resistance and adhesion of waterborne epoxy coatings. Surface modification by 3-glycidoxypropyltrimethoxysilane ameliorated the dispersion of HTM in epoxy matrix and the effect of HTM on protection properties of waterborne epoxy coating. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of molybdate intercalated hydrotalcite - Modification of HTM by 3-glycidoxypropyltrimethoxysilane - Preparation of waterborne epoxy coatings - Analytical characterization - Electrochemical characterization - Adhesion measurement - Salt spray test - RESULTS AND DISCUSSION : Characterization of HTM-GS - Corrosion inhibition effect of HTM-GS - Corrosion protection of carbon steel by waterborne epoxy coatings containing HTM-GS DOI : 10.1007/s11998-016-9791-7 En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9791-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27119 [article]

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Synthesis of conducting PANi/SiO2 nanocomposites and their effect on electrical and mechanical properties of antistatic waterborne epoxy coating / Anh Son Nguyen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 2 (03/2020) . - p. 361-370 Titre : Synthesis of conducting PANi/SiO2 nanocomposites and their effect on electrical and mechanical properties of antistatic waterborne epoxy coating Type de document : texte imprimé Auteurs : Anh Son Nguyen, Auteur ; Thuy Duong Nguyen, Auteur ; Thu Thuy Thai, Auteur ; Anh Truc Trinh, Auteur ; Gia Vu Pham, Auteur ; Hoang Thai, Auteur ; Dai Lam Tran, Auteur ; Thi Xuan Hang To, Auteur ; Duy Trinh Nguyen, Auteur Année de publication : 2020 Article en page(s) : p. 361-370 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antistatiques Dioxyde de silicium Epoxydes Matériaux hybrides Polyaniline Polymères -- Propriétés électriques Polymères en émulsion Revêtements -- Propriétés mécaniques Revêtements en phase aqueuse -- Additifs Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Polyaniline (PANi) has been intensively incorporated in epoxy coatings as a conducting material. However, epoxy coatings containing PANi have poor mechanical properties. In this study, polyaniline/silica (PANi/SiO2) nanocomposites with different contents of silica were prepared via in situ chemical oxidative polymerization method. Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and zeta potential measurements were used to examine the structure and the morphology of synthesized PANi/SiO2 nanocomposites. The thermal and electrical properties of the nanocomposite were studied by thermogravimetric analysis (TGA) and standard four-probe electrode method. It was shown that silica (SiO2) nanoparticles were covered by PANi in PANi/SiO2 nanocomposites and the electrical conductivity of nanocomposites decreased with the increase in SiO2 content. The PANi/SiO2 nanocomposite with 4.1 wt% SiO2 had a conductivity of 7.6 x 10-2 S/cm and that of PANi was 8.7 x 10-2 S/cm. Consequently, epoxy coatings containing 30 wt% PANi/SiO2 nanocomposites displayed a higher surface and volume resistance than the one containing pure PANi. In contrast, the increase in SiO2 content in PANi/SiO2 nanocomposite enhanced the mechanical properties of the epoxy coating, compared to epoxy coating containing pure PANi. The coating containing PANi/SiO2 nanocomposite with 17.2 wt% silica presented good mechanical properties (20 L/mil abrasion resistance, 100 kg cm impact strength) and admissible surface and volume resistivity (1.3 x 1011 Ω/cm2 and 6.6 x 10 10 Ω cm, respectively) for antistatic coatings. Note de contenu : - EXPERIMENTAL : Materials - Preparation of PANi/Sio2 nanocomposites - Preparation of Coatings - Analytical characterization - Conductivity measurement - Mechanical resistance measurement - RESULTS AND DISCUSSION : Characterization of PANi/SiO2 nanocomposite En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00279-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33987 [article]

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