| 摘要: |
| 采用一步原位聚合法制备了脲醛树脂包覆E51/711微胶囊，观察微胶囊形貌呈球形，为单核结构，表面致密，粒径大小分布为25~375 μm。模仿生物组织损伤自愈合原理，将微胶囊引入环氧树脂涂层结构中，设计了潜伏型微胶囊自修复环氧涂层。对不同微胶囊质量分数（5%，10%，15%，20%）的环氧自修复涂层的力学性能进行测试分析，结果表明：随着微胶囊的添加量增大，涂层的冲击强度、附着力级别和巴尔霍兹硬度不断降低，而适量添加微胶囊可提高涂层的附着力。对微胶囊环氧树脂涂料块体试样进行拉伸断裂测试试验，并对涂层进行预置划痕修复试验，结果表明：少量添加微胶囊对涂层起到了一定增韧作用，含微胶囊自修复体系的涂层在受到损伤时能够释放修复剂，填充修复损伤部位。 |
| 关键词: 环氧树脂涂层 微胶囊 自修复 |
| DOI： |
| 分类号: |
| 基金项目:国家科技支撑项目(2011BAF11B07， 2011BAC10B05); 国家自然科学基金（50775222）; 清华大学先进成形制造教育部重点实验室开放基金(2010004) |
|
| Preparation and Performance of Self-healing Epoxy Coatings |
|
LIAO Le-ping, ZHANG Wei, ZHAO Yang
|
|
Science and Technology on Remanufacturing Laboratory, Academy of Armored Force Engineering, Beijing 100072
|
| Abstract: |
| The mixture of epoxy resin E-51/711 was microencapsulated following an in-situ poly (ureaformaldehyde) microencapsulation. The microcapsules were prepared successfully, and their surface was rough. The particle size distribution of the microcapsules ranged between 25 and 375 μm. Mimicking the self-repairing principle of biological tissue injury, the structure of the epoxy resin coatings were designed with the microcapsules. The adhesion level, hardness and impact strength of the coating with different contents (5%, 10%, 15%, 20%) of the microcapsules were tested. The results show that the adhesion level, hardness and impact strength of coating decrease by adding the microcapsules. The appropriate adding of microcapsule can improve the adhesion of the coating. Through the tensile experiment of the block sample of epoxy resin coating, the results show that the toughness of epoxy coating was improved with a few microcapsules. The self-healing systems based on microcapsules have been demonstrated with high healing efficiency through the experiments of the damnification repaired. |
| Key words: epoxy resin coatings microcapsules self-healing |
