陆忠海,张伦武,李传鹏,于金光,刘杰.不同温度对环氧涂层形状记忆效应和防护性能的影响[J].表面技术,2021,50(1):357-365.
LU Zhong-hai,ZHANG Lun-wu,LI Chuan-peng,YU Jin-guang,LIU Jie.Effect of Different Temperatures on Shape Memory Effect and Protective Performance of Epoxy Coating[J].Surface Technology,2021,50(1):357-365 |
| 不同温度对环氧涂层形状记忆效应和防护性能的影响 |
| Effect of Different Temperatures on Shape Memory Effect and Protective Performance of Epoxy Coating |
| 投稿时间：2020-03-04 修订日期：2020-05-19 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.01.032 |
| 中文关键词: 环氧涂层 形状记忆效应 温度 自修复 EIS |
| 英文关键词:epoxy coating shape memory effect temperatures self-healing EIS |
| 基金项目:国家自然科学基金(51971192、51901096);烟台市科技计划项目(2019XDHZ086) |
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| Author | Institution |
| LU Zhong-hai | School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China |
| ZHANG Lun-wu | Weathering Test and Research Center of Science Technology and Industry for National Defense, Southwest Technology and Engineering Research Institute, Chongqing 400039, China |
| LI Chuan-peng | School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China |
| YU Jin-guang | School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China |
| LIU Jie | School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China |
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| 中文摘要: |
| 目的 研究不同温度对环氧涂层形状记忆效应和防护性能的影响。方法 将等物质的量的双酚A二缩水甘油醚、新戊二醇二缩水甘油醚和D230固化剂进行混合，以制备自修复防腐涂层。利用傅里叶变换红外光谱仪(FTIR)和附着力测试仪测试了环氧涂层的化学结构和力学性能，并对不同温度下环氧涂层的形状回复率进行测量，以表征其形状记忆性能。通过电化学阻抗谱(EIS)技术表征了环氧涂层的电化学性能，并通过电子数码显微镜记录划痕涂层的微观形貌演变。结果 不同温度下具有自修复功能的防腐涂层，在红外光谱图中的主要特征峰和相对强度与未加热的环氧涂层基本一致，并且不同温度下环氧涂层的粘结强度均超过了13 MPa。随着加热温度的升高，环氧涂层的回复率先快速增大后缓慢增加，阻抗模值则先增大后减小，划痕宽度则先减小后基本不变。在相同的浸泡时间里，经70 ℃加热后的环氧涂层的阻抗值均明显高于未加热的阻抗值。结论 在一定的温度范围内，自修复防腐涂层未发生降解反应，并具有优异的附着力性能。升高温度使分子链段的运动增强，从而提高了环氧涂层的自修复效能，而加热温度过高时，涂层的自修复性能并未进一步增强，因此得出环氧涂层形状记忆效应的最佳响应温度为70 ℃。环氧涂层在70 ℃加热后已触发其形状记忆效应，使得划痕宽度显著变窄，极大提升了划痕涂层的防护性能。 |
| 英文摘要: |
| The work aims to study the effect of different temperatures on the shape memory effect and protective performance of epoxy coating. Self-healing anticorrosive coating was prepared by mixing equimolar bisphenol A diglycidyl ether, neopentyl glycol diglycidyl ether and D230 curing agent. The chemical structure and mechanical properties of the epoxy coating were characterized by Fourier infrared transform spectroscopy (FTIR) and adhesion tester. The shape recovery rate of the epoxy coating at different temperatures was measured to characterize its shape memory performance. Electrochemical impedance spectroscopy (EIS) technique was used to characterize the electrochemical performance of the epoxy coating, and micro-morphological evolutions of scratched coating were recorded by an electronic digital microscope. The main characteristic peaks and relative intensity of the anti-corrosion coating with self-healing function at different temperatures in the infrared spectrum were basically the same as those of the unheated epoxy coating, and the adhesion strength of the epoxy coating at different temperatures all exceeded 13 MPa. As the heating temperatures increased, the recovery rate of the epoxy coating first increased rapidly and then increased slowly. Meanwhile, the impedance modulus first increased and then decreased, and the scratch width first decreased and then basically did not change. The impedance value of the epoxy coating after heating at 70 ℃ was always significantly higher than that of the unheated epoxy coating in the same immersion time. Within a certain temperature range, the self-healing anticorrosive coating has no degradation reaction, and it has excellent adhesion performance. Increasing temperature enhances the movement trend of molecular chains, and improves the self-healing performance of the epoxy coating. When the heating temperature is very high, the self-healing performance of the coating is not further enhanced. Therefore, the optimal response temperature for obtaining the shape memory effect of the epoxy coating is 70 ℃. Triggering the shape memory effect of the epoxy coating after it is heated to 70 ℃ can significantly narrow the width of the scratches and greatly improve the protective performance of the scratched coating. |
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