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Development of Self-healing Coatings by Linseed Oil Encapsulation

Development of Self-healing Coatings by Linseed Oil Encapsulation
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Self-healing coatings have been promising due to their automatic recovering functions, which can extend the coating lifetime with lower maintenance costs. One of the most effective strategies to achieve self-healing property is to encapsulate healing agents inside microcapsules and integrate the microcapsules into the coating matrix. 

Product Number: 51218-169-SG
Author: Haoran Wang, Qixin Zhou
Publication Date: 2018
Industry: Coatings
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$20.00
$20.00

Self-healing coatings have been promising due to their automatic recovering functions, which can extend the coating lifetime with lower maintenance costs. One of the most effective strategies to achieve self-healing property is to encapsulate healing agents inside microcapsules and integrate the microcapsules into the coating matrix. In this study, linseed oil was successfully encapsulated in poly(urea-formaldehyde) (PUF) shell via insitupolymerization. Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) were used to characterize the chemical composition of the synthesized microcapsules. The size and morphology of the synthesized microcapsules were observed with both optical microscope and scanning electron microscope (SEM). The microcapsules were integrated into epoxy coating matrix to fabricate the self-healing coating. Micro-computed tomography (micro-CT) showed a uniform distribution of microcapsules inside the coating matrix. The robust microcapsules with the high core content ensured their self-healing function. Electrochemical impedance spectroscopy (EIS) was used to monitor the anti-corrosion performance of the self-healing coating. SEM observation of the artificial cracks proved that the self-healing coating exhibited excellent healing performance comparing to the neat epoxy coating.

Self-healing coatings have been promising due to their automatic recovering functions, which can extend the coating lifetime with lower maintenance costs. One of the most effective strategies to achieve self-healing property is to encapsulate healing agents inside microcapsules and integrate the microcapsules into the coating matrix. In this study, linseed oil was successfully encapsulated in poly(urea-formaldehyde) (PUF) shell via insitupolymerization. Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) were used to characterize the chemical composition of the synthesized microcapsules. The size and morphology of the synthesized microcapsules were observed with both optical microscope and scanning electron microscope (SEM). The microcapsules were integrated into epoxy coating matrix to fabricate the self-healing coating. Micro-computed tomography (micro-CT) showed a uniform distribution of microcapsules inside the coating matrix. The robust microcapsules with the high core content ensured their self-healing function. Electrochemical impedance spectroscopy (EIS) was used to monitor the anti-corrosion performance of the self-healing coating. SEM observation of the artificial cracks proved that the self-healing coating exhibited excellent healing performance comparing to the neat epoxy coating.

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