1.中国林业科学研究院木材工业研究所，北京 100091
2.南京林业大学家居与工业设计学院，江苏南京 210037
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孙英纯,吴燕.聚多巴胺改性纳米碳化硼对水性聚氨酯涂层性能的影响研究[J].木材科学与技术,2022,36(03):46-51.
SUN Ying-chun,WU Yan.Effect of Polydopamine-Modified Nano-Boron Carbide on Properties of Waterborne Polyurethane Coatings[J].Chinese Journal of Wood Science and Technology,2022,36(03):46-51.
通过多巴胺（DA）常温自聚合产生的聚多巴胺（PDA）对纳米碳化硼（B,4,C）进行改性，制备聚多巴胺改性纳米碳化硼（B,4,C-PDA），通过添加B,4,C-PDA对水性聚氨酯涂料进行改性，成功制备改性涂料。当B,4,C-PDA添加量为1%时，改性涂层的力学性能最佳，磨耗量最低为0.0058 g/100 r，较对照涂层降低了96.2%；此时改性涂层的耐磨性最好且附着力保持1级，硬度提升为2H；改性涂层的热失重质量保存率由4.20%提升为7.97%。聚多巴胺改性纳米碳化硼/水性聚氨酯涂层具有良好的力学性能和热稳定性。
Polydopamine (PDA) produced by self-polymerization of dopamine (DA) at room temperature was used to modify nano-boron carbide in order to produce polydopamine-modified nano-boron carbide (B,4,C-PDA) coatings. The waterborne polyurethane coating was successfully modified by adding B,4,C-PDA. When 1% of B,4,C-PDA content was added, the mechanical properties of the coating were best, and the abrasion was reduced by 96.2% to a minimum of 0.0058 g/100 r. At this condition, the modified coating had the best abrasion performance and level-1 adhesion property, as well as the hardness of 2H. The thermogravitic mass retention rate of the coating increased from 4.20% to 7.97%. It was proved that the composite waterborne polyurethane coating modified by boron carbide dispersion had good mechanical properties and thermal stability.
纳米碳化硼聚多巴胺耐磨性水性聚氨酯涂料
nano boron carbidepolydopamineabrasion performancewaterborne polyurethane coating
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