Dual-responsive wettability of poly o-toluidine nanofiber coating fabricated by interfacial polymerization / Xianghui Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 4 (07/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 4 (07/2024) . - p. 1255-1262 Titre : Dual-responsive wettability of poly o-toluidine nanofiber coating fabricated by interfacial polymerization Type de document : texte imprimé Auteurs : Xianghui Xu, Auteur ; Zuo Hansong, Auteur ; Xiaoyan Zhou, Auteur ; Weiwei Wei, Auteur ; Yongqing Cao, Auteur Année de publication : 2024 Article en page(s) : p. 1255-1262 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Electrochimie Hydrophilie Hydrophobie Mouillabilité Nanofibres Poly o-toluidine Polymérisation interfaciale Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : To date, smart surfaces with controllable wettability have received extraordinary attention due to their great importance in both fundamental research and practical applications. Chemical composition and surface topography are the two key factors to affect the wettability of solid surfaces. Applying external stimuli to change the surface chemistry and/or topography is considered to be a valuable approach for driving the transition between hydrophilicity and hydrophobicity of surfaces. In this study, poly o-toluidine nanofibers were synthesized by a facile aqueous/organic interfacial polymerization, and superhydrophobic coatings of poly o-toluidine were prepared via a room-temperature spraying process. The reversible wettability conversion between the superhydrophobic and the hydrophilic state of the obtained poly o-toluidine coating under ultraviolet irradiation and electric stimulation was investigated. From the X-ray photoelectron spectroscopy analysis, this intelligent switching wetting behavior under ultraviolet light irradiation was confirmed to have a high correlation with the change in surface chemical composition. When the electric stimulation was applied, the wettability switch was caused by the redistribution of charge and electric dipole along the liquid–solid interface. Note de contenu : - EXPERIMENTAL : Materials - Interfacial polymerization of poly o-toluidine - Fabrication of POT coatings - Dual-responsive wettability of POT coating - Characterization - RESULTS AND DISCUSSION : Interfacial polymerization of POT - Photo-responsive wettability of POT coating - Electrically-responsive wettability of POT coating DOI : https://doi.org/10.1007/s11998-023-00889-x En ligne : https://drive.google.com/file/d/1Secnl7KpGB9JaUg92Y-HWOZCBclXylRT/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41295 [article]

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Morphology tuning of conducting polyaniline via static, liquid-liquid interfacial polymerization process and its application for optical pH sensing / S. M. Thorat in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 2 (05/2015)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 2 (05/2015) . - p. 243-247 Titre : Morphology tuning of conducting polyaniline via static, liquid-liquid interfacial polymerization process and its application for optical pH sensing Type de document : texte imprimé Auteurs : S. M. Thorat, Auteur ; M. V. Kulkarni, Auteur Année de publication : 2015 Article en page(s) : p. 243-247 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Conducteurs organiques Interfaces liquide-liquide Nanoparticules -- Synthèse Polyaniline Polymères -- Synthèse Polymérisation interfaciale Solutions aqueuses (chimie) Index. décimale : 668.4 Plastiques, vinyles Résumé : Nanorods/nanofibers of conducting polymer, polyaniline (PANI) were synthesized via static, liquid-liquid interfacial polymerization process using ammonium persulphate as an oxidizing agent. The monomer, aniline was dissolved in chloroform comprising the organic phase, while the oxidizing agent, ammonium per sulphate was dissolved in doubly distilled water to form an aqueous phase. Para toluene sulphonic acid (p-TSA) was used as dopant during the polymerization process to dope the polyaniline. The presence of conducting emeraldine salt phase of the polymer was confirmed by UV-Vis. and FT-IR spectroscopic characterization. This was further supported by XRD analysis. The morphological studies are carried out using FE-SEM analysis and revealed the presence of uniform sized nanorods/nanofibers having diameter of ?90 nm and length up to few microns. This rapid and novel interfacial polymerization process shows the potential of large scale synthesis of uniform sized nanorods/nanofibers of polyaniline. The synthesized nanostructured polyaniline was successfully utilized for the optical pH sensing application in aqueous state. Note de contenu : - UV-visible spectroscopy - FT-IR spectroscopy - FE-SEM analysis DOI : 10.3139/217.2998 En ligne : https://drive.google.com/file/d/13Ekbdp20RHCKUTqQ8I0i9YYw7cUEFXXt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23906 [article]

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A review of microencapsulated thermochromic coatings for sustainable building applications / Pritish Shivanand Aklujkar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 19-37 Titre : A review of microencapsulated thermochromic coatings for sustainable building applications Type de document : texte imprimé Auteurs : Pritish Shivanand Aklujkar, Auteur ; Balasubramanian Kandasubramanian, Auteur Année de publication : 2021 Article en page(s) : p. 19-37 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colorants Construction -- Matériaux Développement durable Encapsulation Polymérisation interfaciale Revêtements organiques Thermochromie Index. décimale : 667.9 Revêtements et enduits Résumé : The review covers microencapsulation methods for encapsulating thermochromic leuco dyes, and the incorporation of these microencapsulated thermochromic dyes in smart coatings has been developed, which helps in creating sustainable buildings that use less power for heating and cooling applications. The thermochromic mechanism of leuco dye developer–solvent systems has been elaborated, and the role of each component for the functioning of thermochromic dyes is discussed. The future scope of these dyes in applications involving smart windows and smart coatings for sustainable buildings is consolidated, and their impact on energy consumption has been studied. Note de contenu : - THERMOCHROMIC LEUCO DYE : COMPOSITION AND MECHANISM : Composition of the thermochromic system - Mechanism of thermochromic dyes - MICROENCAPSULATION OF THE THERMOCHROMIC LEUCO DYES : Interfacial polymerization - Coacervation - Microencapsulating thermochromic dyes with microPCMs - THERMOCHROMIC COATINGS : APPLICATIONS IN CONSTRUCTION : Thermochromic coating formulation - THERMOCHROMIC SMART WINDOW - Table 1 : Classification of significant types of chromism - Table 2 : Division of the thermochromic systems based on inherent and doped systems DOI : https://doi.org/10.1007/s11998-020-00396-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00396-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35348 [article]

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Self-healing and corrosion performance of polyurethane coating containing polyurethane microcapsules / Hanieh Fathi Fathabadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 5 (09/2021) . - p. 1365-1378 Titre : Self-healing and corrosion performance of polyurethane coating containing polyurethane microcapsules Type de document : texte imprimé Auteurs : Hanieh Fathi Fathabadi, Auteur ; Mehdi Javidi, Auteur Année de publication : 2021 Article en page(s) : p. 1365-1378 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Caractérisation Encapsulation Essais d'adhésion Microcapsules Polymérisation interfaciale Polyuréthanes Revêtement autoréparant Revêtements organiques Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, the self-healing behavior of the polyurethane coating containing polyurethane microcapsules was investigated. Microcapsules, with the average size of 99 µm and shell thickness of 11 µm, were successfully synthesized via the interfacial polymerization technique and were incorporated into the polyurethane coating matrix. The electrochemical impedance spectroscopy and scanning electron microscope were employed to investigate the healing performance and corrosion behavior of the coatings on the carbon steel substrate. The recorded results revealed that artificial scratches were successfully healed and the coating containing 20 wt% microcapsules exhibited the best healing performance (85% healing efficiency) among all the prepared coatings. The self-healing ability of the coatings was verified via scanning electron microscope. After 24 h, the healing efficiency attained a reasonable value of 68% during exposure to test solution. It was found that corrosion resistance and coating adhesion were significantly improved by incorporating the microcapsules into the coating. Note de contenu : - EXPERIMENTAL : Materials - Preparation of microcapsules - SEM investigation - Coatings application - Evaluation of self-healing behavior of the coatings and corrosion performance - Adhesion test - RESULTS AND DISCUSSION : Characterization of the synthesized microcapsules - Self-healing performance of the coatings - The effect of microcapsule concentration on healing process - Time dependency of the healing process - Corrosion performance of the investigated coating - Adhesion test - Table 1 : Prepared and coded samples - Table 2 : The resulted electrochemical data after curve fitting the impedance results for carbon steel samples coated with polyurethane resin containing different concentrations of polyurethane microcapsules in 3.5% NaCl electrolyte - Table 3 : The resulted electrochemical data after curve fitting the impedance results for the carbon steel samples coated with polyurethane resin containing 20 wt% polyurethane microcapsules and the neat coating without any scratches in 3.5% NaCl electrolyte - Table 4 The resulted electrochemical data after curve fitting the impedance data for the carbon steel coated with polyurethane resin containing 20 wt% polyurethane microcapsules in 3.5% NaCl electrolyte at different time intervals - Table 5 The extracted electrochemical data from EIS measurements to evaluate the corrosion performance of the carbon steel coated with polyurethane resin containing 20 wt% polyurethane microcapsules in 3.5% NaCl electrolyte at different time intervals DOI : https://doi.org/10.1007/s11998-021-00501-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00501-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36439 [article]

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