摘要
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)CPDA.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.
作者
孙英纯
吴燕
SUN Ying-chun;WU Yan(Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China;College of Furniture and Industrial Design,Nanjing Forestry University,Nanjing 210037,Jiangsu,China)
出处
《木材科学与技术》
北大核心
2022年第3期46-51,57,共7页
Chinese Journal of Wood Science and Technology
关键词
纳米碳化硼
聚多巴胺
耐磨性
水性聚氨酯涂料
nano boron carbide
polydopamine
abrasion performance
waterborne polyurethane coating
