基于光引发前线聚合原理的隐身涂层快速修复技术研究

The stealth coating plays an important role in the modern flights and weapon systems. However, stealth coating belongs to thick coating since its thickness is usually over 400μm and, once damaged, is difficult to be repaired within a short period of time by using traditional curing process, which will lead to serious consequence during the war. In this project, light-ignited frontal polymerization technique will be explored to overcome the existing problem. We will synthesize a series of special resins based on molecular design approach and the complex ferrous powder or ferrite will be chosen as the electromagnetic wave absorber. By using combination method of thermal/light initiators, rapid release and spread of heat will be realized during the coating's curing process and thus guarantee the stable advance of the curing wave. Meanwhile, the formula of the stealth coating will be optimized by choosing various accessory ingredients and adopting optimum surface treatment procedure, which will finally lead to the rapid curing and repairing of the stealth thick coatings. The exploration of such technique could possibly meet the demands of rapid repairing of the stealth coating in our country during the war time, and will also provide a simple, rapid and green approach for the preparation and repairation of other epoxy-based thick coatings when used in the fields of anti-corrosi, heat insulation and anti-flaming.

隐身身涂层在现代先进战机及武器系统中具有非常重要的地位，而隐身涂层属于厚涂层（>400微米），一旦损伤无法采用传统的固化工艺进行快速修复，这在战时将带来无法估量的后果。本项目拟采用基于光引发的前线聚合技术，通过分子设计手段合成特种涂层树脂基体，以复合铁粉或铁氧体为吸波剂，结合光/热引发剂复配技术，实现涂层固化过程中热的快速释放和传导以保证固化波的稳定推进；同时通过各种助剂的选择及表面处理工艺的优化，以减少快速固化隐身涂层的缺陷，进一步优化修复涂料配方，制备出性能优良的快速固化隐身修复涂料，并最终实现隐身厚涂层的快速固化和修复。该技术可望解决我国战时对隐身涂层快速修复的要求，同时为其他环氧树脂厚涂层如防腐、隔热、阻燃涂层的制备和修复提供了一条简易、快速、环保的新途径。

隐身涂层的快速修补技术对于提高我国先进战机和舰船等武器装甲的战斗效能具有十分重要的意义。本项目首先通过分子设计手段合成了一系列可用于隐身涂层的柔韧性好的树脂基体，利用光/热引发剂复配技术，通过光引发前线聚合技术，实现了不同环氧树脂基体的前线聚合反应，揭示了环氧体系中的下行和水平前线聚合反应的的聚合行为和及其对固化产物性能的影响规律。进而，以柔性环氧树脂基体为胶粘剂，以复合铁粉或铁氧体为吸波剂，通过配方优化，制备了一系列性能优良的快速固化修复涂料，成功实现了隐身厚涂层的快速固化与修复。本项目在国际上首次报道了环氧树脂厚尺寸材料的水平前线聚合行为，首次发现了纯环氧树脂及其纳米复合体系中存在固定的“推动角”现象---即固化反应的聚合前线以与水平面成一个特定角度稳定推动。该成果得到了国际同行很高的评价。本项目的研究成果可用于隐身涂层的快速修复，同时为其他环氧树脂厚涂层如防腐、隔热、阻燃涂层的制备和修复提供了一条简易、快速、环保的新途径。项目资助发表论文10篇，其中SCI收录4篇，EI收录2篇，接收待发表两篇，获得授权专利7项，其中1项专利转让，并获得生产推广产生了经济和社会效益。