Self-Healing Epoxy Coatings via Focused Sunlight Based on Photothermal Effect

Liang Fang; Jiamei Chen; Yuting Zou; Shunping Chen; Tianyu Fang; Chunhua Lu; Zhongzi Xu

doi:10.1002/mame.201700059

Self-Healing Epoxy Coatings via Focused Sunlight Based on Photothermal Effect

Liang Fang, Jiamei Chen, Yuting Zou, Shunping Chen, Tianyu Fang, Chunhua Lu, Zhongzi Xu

College of Materials Science and Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

Epoxy coatings which can be healed via photothermal effect from focused sunlight are reported. The diamine of m-xylylenediamine (MXDA) and monoamine of 4-(heptadecafluorooctyl)aniline (HFOA) are reacted into the diglycidylether of bisphenol A (DGEBA) network. Via gradual replacement of MXDA with HFOA, the glass transition temperature and crosslinking density of the epoxy network are tuned to achieve the thermally induced healing based on chain diffusion and reentanglement. Aniline black (AB) with well absorptivity for sunlight is used subsequently as the organic photothermal compound, transferring the thermally induced healing into a sunlight responsive one. A common handheld magnifier, which can focus natural sunlight to the required power density (0.6–0.9 W cm⁻¹), is used to successfully heal one cracked coating in outdoor circumstance. This study provides a potential approach to achieve the convenient, precise, and timely healing for outdoor epoxy coatings. (Figure presented.).

Original language	English
Article number	1700059
Journal	Macromolecular Materials and Engineering
Volume	302
Issue number	9
DOIs	https://doi.org/10.1002/mame.201700059
State	Published - Sep 2017

Keywords

coatings
epoxy
self-healing
stimuli-responsive materials
sunlight

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title = "Self-Healing Epoxy Coatings via Focused Sunlight Based on Photothermal Effect",

abstract = "Epoxy coatings which can be healed via photothermal effect from focused sunlight are reported. The diamine of m-xylylenediamine (MXDA) and monoamine of 4-(heptadecafluorooctyl)aniline (HFOA) are reacted into the diglycidylether of bisphenol A (DGEBA) network. Via gradual replacement of MXDA with HFOA, the glass transition temperature and crosslinking density of the epoxy network are tuned to achieve the thermally induced healing based on chain diffusion and reentanglement. Aniline black (AB) with well absorptivity for sunlight is used subsequently as the organic photothermal compound, transferring the thermally induced healing into a sunlight responsive one. A common handheld magnifier, which can focus natural sunlight to the required power density (0.6–0.9 W cm−1), is used to successfully heal one cracked coating in outdoor circumstance. This study provides a potential approach to achieve the convenient, precise, and timely healing for outdoor epoxy coatings. (Figure presented.).",

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author = "Liang Fang and Jiamei Chen and Yuting Zou and Shunping Chen and Tianyu Fang and Chunhua Lu and Zhongzi Xu",

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year = "2017",

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AU - Fang, Liang

AU - Chen, Jiamei

AU - Zou, Yuting

AU - Chen, Shunping

AU - Fang, Tianyu

AU - Lu, Chunhua

AU - Xu, Zhongzi

PY - 2017/9

Y1 - 2017/9

N2 - Epoxy coatings which can be healed via photothermal effect from focused sunlight are reported. The diamine of m-xylylenediamine (MXDA) and monoamine of 4-(heptadecafluorooctyl)aniline (HFOA) are reacted into the diglycidylether of bisphenol A (DGEBA) network. Via gradual replacement of MXDA with HFOA, the glass transition temperature and crosslinking density of the epoxy network are tuned to achieve the thermally induced healing based on chain diffusion and reentanglement. Aniline black (AB) with well absorptivity for sunlight is used subsequently as the organic photothermal compound, transferring the thermally induced healing into a sunlight responsive one. A common handheld magnifier, which can focus natural sunlight to the required power density (0.6–0.9 W cm−1), is used to successfully heal one cracked coating in outdoor circumstance. This study provides a potential approach to achieve the convenient, precise, and timely healing for outdoor epoxy coatings. (Figure presented.).

AB - Epoxy coatings which can be healed via photothermal effect from focused sunlight are reported. The diamine of m-xylylenediamine (MXDA) and monoamine of 4-(heptadecafluorooctyl)aniline (HFOA) are reacted into the diglycidylether of bisphenol A (DGEBA) network. Via gradual replacement of MXDA with HFOA, the glass transition temperature and crosslinking density of the epoxy network are tuned to achieve the thermally induced healing based on chain diffusion and reentanglement. Aniline black (AB) with well absorptivity for sunlight is used subsequently as the organic photothermal compound, transferring the thermally induced healing into a sunlight responsive one. A common handheld magnifier, which can focus natural sunlight to the required power density (0.6–0.9 W cm−1), is used to successfully heal one cracked coating in outdoor circumstance. This study provides a potential approach to achieve the convenient, precise, and timely healing for outdoor epoxy coatings. (Figure presented.).

KW - coatings

KW - epoxy

KW - self-healing

KW - stimuli-responsive materials

KW - sunlight

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ER -

Self-Healing Epoxy Coatings via Focused Sunlight Based on Photothermal Effect

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Keywords

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