Fluorescence labelling and self-healing microcapsules (FLSM) with fluorescein sodium labelled epoxy resin as core materials and urea-formaldehyde resin as shell materials were synthesized by in situ polymerization via ultrasonic dispersion. Micromorphology, chemical structure, thermal stability and reactivity of FLSM were studied by ESEM, FTIR, TGA and DSC. Laser scanning confocal microscopy (LSCM) was served to characterize the surface microcracks repair process of cement paste mixed FLSM. The results showed that FLSM with full spherical particles and a certain roughness on the surface were well dispersed in the range of 150–300 μm of particle size. The addition of fluorescein sodium has no significant effect on the micromorphology, chemical structure, thermal stability and reactivity of FLSM. After being cut by the blade, the fluorescence width of FLSM increased from 9 μm to 22 μm within 0–12 h. The core materials of FLSM was basically lost, which indicated that the core materials had good fluidity. When the microcracks occur on the surface of cement paste, FLSM can not only detect the specific location of the microcracks and repair them, but also infer the width of the microcracks. It provides a new method for detecting and repairing microcracks on the surface of cement matrix.

以荧光素钠标记的环氧树脂为核心材料，尿素-甲醛树脂为壳材料，通过超声分散原位聚合合成了荧光标记和自修复微胶囊（FLSM）。通过ESEM，FTIR，TGA和DSC对FLSM的微观形貌，化学结构，热稳定性和反应性进行了研究。激光扫描共聚焦显微镜（LSCM）用于表征水泥浆混合FLSM的表面微裂纹修复过程。结果表明，具有完整球形颗粒且表面具有一定粗糙度的FLSM分散在150-300μm的粒径范围内。荧光素钠的添加对FLSM的微观形貌，化学结构，热稳定性和反应性没有显着影响。被刀片割开后 在0-12小时内，FLSM的荧光宽度从9μm增加到22μm。FLSM的核心材料基本消失，表明核心材料具有良好的流动性。当微裂纹出现在水泥浆的表面时，FLSM不仅可以检测微裂纹的特定位置并对其进行修复，还可以推断出微裂纹的宽度。它提供了一种检测和修复水泥基体表面微裂纹的新方法。