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材料导报  2019, Vol. 33 Issue (14): 2456-2460    https://doi.org/10.11896/cldb.18050147
  高分子与聚合基复合材料 |
水性聚氨酯改性环氧树脂乳液的涂膜性能研究
王玉龙1, 侯立杰2, 刘志勇1, 李世宇1, 李卓辉2
1 烟台大学土木工程学院,烟台 264000;
2 烟台大学化学与化工学院,烟台 264000
Study on Coating Properties of Waterborne Polyurethane Modified Epoxy Resin Latex
WANG Yulong1, HOU Lijie2, LIU Zhiyong1, LI Shiyu1, LI Zhuohui2
1 College of Civil Engineering, Yantai University, Yantai 264000;
2 College of Chemistry and Chemical Engineering, Yantai University, Yantai 264000
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摘要 制备不同粒径的水性聚氨酯,并分析添加不同粒径和掺量的水性聚氨酯对环氧乳液成膜拉伸性能、断裂伸长率的影响,同时测试了涂膜的抗冲击、柔韧性、耐腐蚀性、光泽度等性能。结果发现:粒径为55 nm的水性聚氨酯掺量为5%时对水性环氧树脂的增韧效果最好,改性涂膜的拉伸强度、断裂伸长率和断裂能比未改性环氧涂膜分别提高了30%、62%和143%,而弹性模量基本不降低。SEM结果表明:掺加聚氨酯后环氧涂膜在受到外力作用时可使应力分散,断口表面条纹多且层次丰富,呈现韧性断裂的特点,形成涂膜的抗冲击、柔韧性、耐酸碱、光泽度等性能也有显著改善。
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王玉龙
侯立杰
刘志勇
李世宇
李卓辉
关键词:  水性聚氨酯  水性环氧树脂  增韧  涂膜  性能    
Abstract: Waterborne polyurethanes with diverse particle sizes were prepared first. Then, the influence of adding waterborne polyurethanes with diffe-rent particle sizes and amounts in epoxy resin latex on the tensile properties and elongation at break of the modified epoxy resin film were investigated. The impact properties, flexibility, corrosion resistance, gloss and other properties of the modified epoxy resin coating were analyzed. The results indicated that the modified epoxy resin with the best toughening effect was prepared by adding 5% waterborne polyurethane with particle size of 50 nm. Compared to the epoxy coating without modification, the modified epoxy resin coating exhibited the increase of 30%, 62%, and 143% in tensile strength, elongation at break, and fracture energy, while the modulus of elasticity of the modified coating did not decrease. It could be observed from SEM results that fracture surface of the modified coating was rich in stripes and layers, showing the characteristics of ductile fracture. This might be explained by the addition of waterborne polyurethane that made the stress on the modified epoxy resin coa-ting be effectively dispersed when subjected to external force. In addition, the properties of the coating, including impact resistance, flexibility, glossiness, acid resistance and alkali resistance, were also improved evidently.
Key words:  waterborne polyurethane    waterborne epoxy resin    toughening    coating    performance
                    发布日期:  2019-06-19
ZTFLH:  TQ323.5  
基金资助: 国家自然科学基金(51678512;51278443);山东省重点研发计划项(2017GGX70107);烟台大学研究生创新基金(YDYB1809)
通讯作者:  Lzy1698@163.com   
作者简介:  王玉龙,硕士研究生,主要研究涂层的耐腐蚀性。刘志勇,博士,教授,主要从事混凝土材料与结构的耐久性及耐久性提升技术、钢筋混凝土的腐蚀防护与修复技术的研究与开发。在国内外重要期刊发表学术论文50余篇,其中SCI/EI收录30余篇,获国家发明专利5项,出版专著1部。
引用本文:    
王玉龙, 侯立杰, 刘志勇, 李世宇, 李卓辉. 水性聚氨酯改性环氧树脂乳液的涂膜性能研究[J]. 材料导报, 2019, 33(14): 2456-2460.
WANG Yulong, HOU Lijie, LIU Zhiyong, LI Shiyu, LI Zhuohui. Study on Coating Properties of Waterborne Polyurethane Modified Epoxy Resin Latex. Materials Reports, 2019, 33(14): 2456-2460.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.18050147  或          http://www.mater-rep.com/CN/Y2019/V33/I14/2456
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