| TONG Xiao-mei,HAO Qin-qin,YAN Zi-ying,YUAN Meng.Preparation and Properties of Self-healing Coatings Containing Epoxy Resin Microcapsules[J],46(12):84-90 |
| Preparation and Properties of Self-healing Coatings Containing Epoxy Resin Microcapsules |
| Received:June 05, 2017 Revised:December 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.12.015 |
| KeyWord:microcapsules latent curing agent epoxy resin self-healing coating |
| Author | Institution |
| TONG Xiao-mei |
School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an , China |
| HAO Qin-qin |
School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an , China |
| YAN Zi-ying |
School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an , China |
| YUAN Meng |
School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an , China |
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| Abstract: |
| The work aims to prepare binary self-healing coating containing epoxy resin microcapsules and study mechanical properties self-healing property of the coating. The binary self-healing epoxy coating was prepared by adding self-made epoxy resin E-51/urea-melamine-formaldehyde microcapsules and latent curing agent (2-methylimidazole) to epoxy resin matrix in certain proportion. Bending property, impact resistance and tensile strength of the coating were tested with paint film elasticity testing machine, paint film impact testing machine and universal tensile testing machine. Self-healing property of the coating was investigated with OM and SEM. Electrochemical property was tested with EIS. The binary self-healing coating containing epoxy resin microcapsules was successfully prepared. When the microcapsules content in the coating reached 3%, the impact strength and tensile strength of the coating increased by 10.6% and 14.6%, respectively. When the 2-methylimidazole and microcapsules content was 6% and 5%, respectively, the self-healing property of the coating was excellent. When the microcapsules content in the coating was 9%, electrochemical impedance value of the coating was up to 1.2×105 ohms. The addition of microcapsules can effectively improve the impact strength and tensile strength of the coating. As the content of latent curing agent increases in the coating, the self-healing property of the coating gradually improves. When the content of latent curing agent reaches a certain value, the self-healing property of the coating improves as the microcapsules content increases in the coating. The electrochemical impedance value of the coating increases with the increase of microcapsules content. |
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