دورية أكاديمية
Synthesis of TiO2 nanogel composite for highly efficient self-healing epoxy coating
| العنوان: | Synthesis of TiO2 nanogel composite for highly efficient self-healing epoxy coating |
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| المؤلفون: | Erfan Rezvani Ghomi, Saied Nouri Khorasani, Mohammad Sadegh Koochaki, Mohammad Dinari, Shahla Ataei, Mohammad Hossein Enayati, Oisik Das, Rasoul Esmaeely Neisiany |
| المصدر: | Journal of Advanced Research, Vol 43, Iss , Pp 137-146 (2023) |
| بيانات النشر: | Elsevier, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Medicine (General) LCC:Science (General) |
| مصطلحات موضوعية: | Self-healing, Coatings, Hydrogels, Titanium dioxide, Nanogel composite, Medicine (General), R5-920, Science (General), Q1-390 |
| الوصف: | Introduction: Organic coatings are the most effective and facile methods of protecting steel against corrosion, which shields it from direct contact with oxygen and moisture. However, they are inherently defective and susceptible to damage, which allows the penetration of the corrosive media into the underlying substrates. Self-healing coatings were developed to address this shortcoming. Objective: The current research aims to develop a coating with superior self-healing ability via embedment of titanium dioxide (TiO2) nanogel composite (NC) in a commercial epoxy. Methods: The TiO2 NC was prepared by efficient dispersion of TiO2 nanoparticles in copolymer gel of acrylamide (AAm) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) with the help of 3-(trimethoxysilyl) propyl methacrylate (MPS). The chemical structure, morphology, and thermal properties of the modified and functionalized nanoparticles were assessed by infrared spectroscopy, electron microscopy, X-ray diffraction, and thermogravimetric analysis, respectively. In addition, TiO2 nanoparticles, nano-TiO2 functionalized monomer (NTFM), and NTFM/AAm/AMPS in different weight percentages were incorporated into epoxy resin to prepare a self-healing coating. Results: The results confirmed the successful fabrication of the NC. In addition, the incorporation of 1 wt% NTFM/AAm/AMPS led to homogenous dispersion, enhanced anti-corrosive and self-healing performance with the healing efficiencies of 100% and 98%, which were determined by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization methods, respectively. Conclusion: The prepared NC was sensitive towards salt concentration, pH, which aids the quick reaction of the TiO2 NC to corrosive ions, once the cracks occur. In addition, this is a unique feature compared to the other self-healing mechanisms, especially, the encapsulation of healing agents, which can be effective as long as the healing agent is present. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2090-1232 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2090123222000522; https://doaj.org/toc/2090-1232 |
| DOI: | 10.1016/j.jare.2022.02.008 |
| URL الوصول: | https://doaj.org/article/696ec6e96b724bf8ab0f0c3b3b64a1f6 |
| رقم الأكسشن: | edsdoj.696ec6e96b724bf8ab0f0c3b3b64a1f6 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20901232 |
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| DOI: | 10.1016/j.jare.2022.02.008 |