Evaluation of the self-healing capabilities and resistance to thermal cycling of a shape-memory epoxy coating containing polycaprolactone microspheres

Melges, Fernando Cozim; Silva, Brunela Pereira da; Aoki, Idalina Vieira

doi:10.1016/j.porgcoat.2022.107322

Cited by 4 publications

(4 citation statements)

References 39 publications

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“…When the temperature rose further to 280 °C, PIHM BMD -280 exhibited peaks at 1780, 1718, 1375, and 718 cm −1 , which belonged to asymmetric and symmetric stretching vibration peaks of C═O (imide rings), C─N and imide rings, as well as a peak at 2920 cm −1 , which was ascribed to C─H in MDA. The solid 13 C NMR spectrum of PIHM BMD s was displayed in Figure 2b, there were some chemical shift peaks at 170, 165, and 110-150 ppm, which were attributed to C═O in imide rings, CONH, and benzene rings, respectively. Therefore, FTIR and 13 C NMR data supported that PIHM BMD s were successfully fabricated.…”

Section: Chemical Structure Of Pihm Bmd Smentioning

confidence: 99%

“…The solid 13 C NMR spectrum of PIHM BMD s was displayed in Figure 2b, there were some chemical shift peaks at 170, 165, and 110-150 ppm, which were attributed to C═O in imide rings, CONH, and benzene rings, respectively. Therefore, FTIR and 13 C NMR data supported that PIHM BMD s were successfully fabricated.…”

Section: Chemical Structure Of Pihm Bmd Smentioning

confidence: 99%

“…[1][2][3][4][5][6] The most widely studied microspheres include polystyrene, polymethyl methacrylate, polylactic acid, polyethylene glycol, and polycaprolactone microspheres. [7][8][9][10][11][12][13] However, they are difficult to meet the usage demands in harsh environments, such as high temperature, radiation and alternating electric field environments, etc., due to their molecular structures and functional group types.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Scalable Fabrication of Lightweight, Heat‐Resistant, and Controllable Sizes Polyimide Hollow Microspheres

Meng,

Ni,

Zhou

et al. 2023

Macro Chemistry & Physics

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Polyimide hollow microspheres (PIHMs) possess lightweight and excellent thermal resistance, making them highly valuable for various applications in aerospace, catalysis and irradiation. Co‐polymerized PIHMs (PIHMBMDs) were fabricated through powder foaming combined with a gradient heating strategy in this work. The diameter of PIHMBMDs ranged from 364 to 1230 µm, which could be designed by regulating the size of polyester ammonium salts (PEASs). The PIHMBMDs possessed intact morphology with a breakage rate of 3∼10% and low bulk density with a density ranging from 28.3 to 62.9 kg m−3. Furthermore, PIHMBMDs exhibited excellent thermal properties with a 5% weight loss temperature and glass transition temperature of 525.0 and 282.5 °C respectively, making it an ideal material for fabricating lightweight and high‐temperature‐resistant multifunctional composites. Moreover, the proposed method is simple, efficient and easily scalable, which is suitable for industrial applications to manufacture large quantities of PIHMs.This article is protected by copyright. All rights reserved

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Section: Chemical Structure Of Pihm Bmd Smentioning

confidence: 99%

Section: Chemical Structure Of Pihm Bmd Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Scalable Fabrication of Lightweight, Heat‐Resistant, and Controllable Sizes Polyimide Hollow Microspheres

Meng,

Ni,

Zhou

et al. 2023

Macro Chemistry & Physics

View full text Add to dashboard Cite

show abstract

“…Organic coatings have been widely used to shield metallic structures against corrosion because they form a physical barrier between the metal and the corrosive species found in the environment 1–4 . If the coating is damaged by scratching or cracking, those species readily penetrate and reach the exposed metal, and the advance of corrosion from the defect site is unavoidable, resulting in a considerable reduction in service life.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of innovative epoxy resin and polyamine hardener microcapsules and their age monitoring by confocal Raman imaging

Aramayo,

Aoki

2024

J of Applied Polymer Sci

Self Cite

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We present an innovative breakthrough encompassing synthesis, characterization, and age monitoring of epoxy resin and polyamine hardener microcapsules to form a dual‐component system for self‐healing anticorrosion coatings. The epoxy resin microcapsules (ER‐MC) are fabricated through oil–water emulsion and in situ polymerization, with poly (urea‐formaldehyde‐melamine) as shell material and a mixture of epoxy resin and n‐butyl glycidyl ether as core material. Modified aliphatic fast reactive polyamine hardener is microencapsulated with polymethylmethacrylate as shell using double emulsion and solvent evaporation method (PAH‐MC). Characterization includes optical microscopy, scanning electron microscopy, and particle size analyzer utilizing laser diffraction. The resulting microcapsules exhibited spherical shape with smooth surface devoid of porosity. Fourier transform infrared spectroscopy‐attenuated total reflection is utilized to confirm encapsulation by identifying the chemical structures of both microcapsule constituents. The thermogravimetric analysis further confirms the core content of microcapsules obtained from solvent extraction. ER‐MC contains approximately 66 wt %, while PAH‐MC stands 40 wt %, both showcasing remarkable thermal stability below 200°C. A ten‐month storage period fails to diminish the presence of the healing agents encapsulated within the polymeric walls, which is revealed by Raman spectroscopy utilizing 2D compositional mapping. This research demonstrates the viability of creating dual microcapsules and exemplify their potential for developing self‐healing coatings with dual‐component film‐forming healing agents.

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Photothermal cyclic self-healing coating with long-term corrosion protection based on bifunctional graphene

Zhang

Sun

Wang

et al. 2023

Chemical Engineering Journal

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Evaluation of the self-healing capabilities and resistance to thermal cycling of a shape-memory epoxy coating containing polycaprolactone microspheres

Cited by 4 publications

References 39 publications

Scalable Fabrication of Lightweight, Heat‐Resistant, and Controllable Sizes Polyimide Hollow Microspheres

Scalable Fabrication of Lightweight, Heat‐Resistant, and Controllable Sizes Polyimide Hollow Microspheres

Synthesis of innovative epoxy resin and polyamine hardener microcapsules and their age monitoring by confocal Raman imaging

Photothermal cyclic self-healing coating with long-term corrosion protection based on bifunctional graphene

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