常用的紫外线(UV)固化涂料具有固化速度快的特点,高硬度,耐磨性强,等。然而,UV涂层被破坏后的自修复性能仍有待提高。自修复微胶囊可以缓解这个问题。UV面涂层本身具有良好的性能,因此可以直接选择它作为微胶囊的核心材料。UV顶涂层微胶囊可以添加到UV顶涂层中,以增加UV涂层的自修复性能,以达到更好地保护UV涂层和纤维板的目的。制备并添加不同含量的UV顶涂层微胶囊,化学,纤维板表面UV涂层的自修复性能。1#,2#,和3#UV顶涂层微胶囊,制备的乳化剂HLB值分别为10.04、10.88和11.72,以2.0%的含量添加到UV顶涂层中,4.0%,6.0%,8.0%,和10.0%。使用两种底漆和两种顶部涂层的方法将UV涂层施加到纤维板上,在底漆中没有添加微胶囊,并进行了测试和分析。结果表明,当微胶囊含量大于6.0%时,接近8.0%,微胶囊的过大密度产生了微胶囊之间的堆积和挤出。因此,当部分微胶囊破裂时,核心材料不能顺利流出。核心材料的流出没有得到有效利用,从而导致自愈率下降。4.0%的2#UV顶涂层微胶囊使UV涂层的自修复率达到26.41%。6.0%的3#UV顶涂层微胶囊制备的UV涂料的自修复率可达26.58%。用6.0%的1#UV面漆微胶囊制备的UV涂料在三组中具有最高的自愈合率,高达27.32%。该组的UV涂层具有最佳的综合性能,色差ΔE为4.08,光泽度为1.10GU,反射率为17.13%,附着力等级为3,硬度为3H,3级的抗冲击性,粗糙度为1.677μm。研究纤维板表面UV涂层与UV顶涂层微胶囊的含量可以为优化UV涂层的自修复性能提供支持,也可以为纤维板表面自修复涂层的制备提供创新思路。
The commonly used ultraviolet ray (UV) curing coatings have the characteristics of fast curing speed, high hardness, strong abrasion resistance, etc. However, the self-healing properties of UV coatings after being damaged still need to be improved. Self-healing microcapsules can alleviate this problem. The UV top coating itself has good properties, so it can be directly chosen as the core material of microcapsules. UV top coating microcapsules can be added to the UV top coating to increase the self-healing properties of the UV coating to achieve the purpose of better protection of the UV coating and fiberboards. UV top coating microcapsules were prepared and added in different contents to characterize the effect on the physical, chemical, and self-healing properties of the UV coating on a fiberboard surface. The 1#, 2#, and 3# UV top coating microcapsules that were prepared with emulsifier HLB values of 10.04, 10.88, and 11.72, respectively, were added to the UV top coating at contents of 2.0%, 4.0%, 6.0%, 8.0%, and 10.0%. The UV coatings were applied to the fiberboard using a method of two primers and two top coatings, in which no microcapsule was added in the primer, and were tested and analyzed. The results showed that when the content of microcapsules was greater than 6.0%, close to 8.0%, the excessive density of microcapsules produced stacking and extrusion between the microcapsules. As a result, the core material could not flow out smoothly when part of the microcapsule was ruptured. The outflow of the core material was not efficiently utilized, thus leading to a decrease in the self-healing rate. The 2# UV top coating microcapsules of 4.0% made the UV coatings reach the self-healing rate of 26.41%. The self-healing rate of the UV coatings prepared with the 3# UV top coating microcapsules with 6.0% was up to 26.58%. The UV coatings prepared with the 1# UV top coating microcapsules of 6.0% had the highest self-healing rate among the three groups, up to 27.32%. The UV coatings of this group had the best comprehensive properties with a chromatic aberration ΔE of 4.08, a gloss of 1.10 GU, a reflectance of 17.13%, an adhesion grade of 3, a hardness of 3H, a grade 3 of impact resistance, and a roughness of 1.677 μm. An investigation of the UV coatings on fiberboard surfaces with the content of UV top coating microcapsules can provide support for the optimization of the self-healing properties of UV coatings and can also provide innovative ideas for the preparation of the self-healing coatings on fiberboard surfaces.