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[目的]聚氨酯涂料具有优异的防腐性能，然而其抗紫外老化能力不佳，影响长期耐久性。[方法]通过原位合成法，成功将硅藻土纳米粒子均匀分散于聚氨酯基体中，制备了硅藻土/聚氨酯复合涂层。利用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射(XRD)等手段对复合涂层的微观结构和化学组成进行了表征。[结果]30%硅藻土的引入显著提高了聚氨酯涂层的耐盐雾、耐紫外性能和硬度。在500 h的紫外线照射下，复合涂层的光泽度降低率从纯聚氨酯涂层的19.4%降低到10.3%，耐盐雾腐蚀时间从58 d延长至68 d。硅藻土改性聚氨酯涂层的铅笔硬度可达到3H。[结论]该硅藻土改性聚氨酯涂层在防腐蚀领域具有良好的应用前景。
Abstract：[Objective] Polyurethane coatings exhibit excellent corrosion resistance, yet their susceptibility to ultravioletinduced degradation compromises long-term protective performance. [Method] Diatomite nanoparticles were uniformly dispersed in a polyurethane matrix via in-situ synthesis, successfully fabricating polyurethane/diatomite composite coatings. The microstructure and chemical composition of the composite coatings were characterized by scanning electron microscopy(SEM), energy-dispersive spectroscopy(EDS), and X-ray diffraction(XRD). [Result] The incorporation of 30% diatomite significantly improved the salt spray resistance, ultraviolet resistance, hardness of the polyurethane coating. After 500 hours of violent irradiation, the glossiness reduction rate was decreased from 19.4% for the pure polyurethane coating to 10.3% for the composite coating. The salt spray corrosion resistance was extended from 58 days to 68 days. The pencil hardness of the diatomite-modified polyurethane coating reached 3H. [Conclusion] The diatomite-modified polyurethane coating reported in this paper demonstrates promising application potential in the field of corrosion protection.
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基本信息:
DOI：10.19289/j.1004-227x.2026.01.016
中图分类号:TB306
引用信息:
[1]杨宝国,方桂欢,林国彬,等.硅藻土改性聚氨酯涂层的制备及性能[J].电镀与涂饰,2026,45(01):123-128.DOI:10.19289/j.1004-227x.2026.01.016.
基金信息:
国家自然科学基金面上项目(52271355)