Infrared-responsive shape memory self-healing and fluorescent damage-indication anti-corrosion coatings for aluminum alloys / Xue-qi Zhang 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. 1431-1446 Titre : Infrared-responsive shape memory self-healing and fluorescent damage-indication anti-corrosion coatings for aluminum alloys Type de document : texte imprimé Auteurs : Xue-qi Zhang, Auteur ; Rui Ding, Auteur ; Jie Xu, Auteur ; An-lan Ji, Auteur ; Yu-chen Zhang, Auteur ; Jie Fu, Auteur ; Xiao Lv, Auteur ; Lan Yao, Auteur ; Sheng-ying Yang, Auteur ; Qing-guo Mao, Auteur ; Xuan Liang, Auteur ; Jie Liu, Auteur ; Xiao Wang, Auteur Année de publication : 2024 Article en page(s) : p. 1431-1446 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages Anticorrosifs Anticorrosion Caractérisation Composites polymères Effet mémoire de forme Epoxydes Fluorescence Indication de dommages Métaux -- Revêtements protecteurs Revêtement autoréparant Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Widely applied aluminum alloys in ship hulls, underwater vehicles, and marine machinery experience severe corrosion in harsh marine environments. For corrosion protection of aluminum alloys, the most convenient, effective, and low-cost approach was the application of anti-corrosion coatings. Coatings possessing self-healing properties to spontaneously repair damages have emerged as a research focus for new types of coatings. In this study, focused on the indication and repair of anti-corrosion coating damages for aluminum alloys, the fluorescent aggregation-induced emission (AIE) composite probe, rhodamine-naphthalimide (RNI), was synthesized, and the composite polymer materials HPPA-SMPU containing 2-hydroxyphosphinoyl carboxylic acid-doped polyaniline and shape memory polyurethane were prepared. Coaxial electrospinning technology was introduced to combine the two and create the fibrous materials with the fiber wall constructed from HPPA-SMPU, encapsulating the interior RNI solution. The fibers were incorporated into the epoxy coatings. RNI exhibited water-triggered AIE, Al3+-CHEF (chelation-enhanced fluorescence), and pH-responsive fluorescent properties to indicate infrared laser-targeted points of coating damages. The photothermal properties of HPPA-SMPU caused localized heating of the damaged coatings, reaching the phase transition temperature of epoxy and SMPU, leading to softening, expansion, shape memory behavior, and healing of the coating damages. The self-healing approaches enhanced the protective performance of the coatings for aluminum alloys, showcasing and extending the development of synergistic and intelligent functions in novel self-healing coating technologies. Note de contenu : - EXPERIMENTAL : Reagent description - Preparation of rhodamine naphthalimide - Preparation of 2-hydroxyphosphonyl carboxylic acid doped polyaniline (HPPA) - Preparation of photothermal shape memory composite polymer HPPA-SMPU - Preparation of electrospinning HPPA-SMPU@RNI core-sheath structure fiber - Preparation of HPPA-SMPU@RNI composite coatings - Characterization of material structure and morphology - Testing for fluorescence properties of RNI in response to coating damage - Evaluation of photothermal shape memory performance of HPPA-SMPU - Evaluation of photothermal self-healing performance of composite coatings - RESULTS AND DISCUSSION : Structural characterization of RNI and HPPA-SMPU - Characterization of HPPA-SMPU@RNI fibers - The fluorescence properties of RNI and its indication of coating damages - Photothermal shape memory performance of HPPA-SMPU - Photothermal self-healing behavior of composite coatings - Damage-indication and self-healing mechanism of coating damages DOI : https://doi.org/10.1007/s11998-023-000905-0 En ligne : https://drive.google.com/file/d/13z06vWc-NS6tpL__FToEg-SnEaAbffKf/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41309 [article]

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