Effect of Polydopamine-Modified Nano-Boron Carbide on Properties of Waterborne Polyurethane Coatings

Ying-chun SUN; Yan WU

doi:10.12326/j.2096-9694.2021150

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Effect of Polydopamine-Modified Nano-Boron Carbide on Properties of Waterborne Polyurethane Coatings
1.Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China
2.College of Furniture and Industrial Design,Nanjing Forestry University,Nanjing 210037,Jiangsu,China
Vol. 36, Issue 3, Pages: 46-51(2022)
DOI： 10.12326/j.2096-9694.2021150

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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.
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. DOI： 10.12326/j.2096-9694.2021150.

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. DOI： 10.12326/j.2096-9694.2021150.

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。

Abstract

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.

关键词

纳米碳化硼聚多巴胺耐磨性水性聚氨酯涂料

Keywords

nano boron carbidepolydopamineabrasion performancewaterborne polyurethane coating

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