修饰碳纳米管对硼酚醛树脂摩擦性能的影响

Effect of Modified Multiwalled Carbon Nanotubes on Friction Properties of Boron Phenolic Resin

摘要:

采用共价接枝法制备了羧基化碳纳米管(MWCNTsCOOH)、二氨基二苯基甲烷修饰碳纳米管(MWCNTsDDM)、硼酸化碳纳米管(MWCNTsBorate) 修饰碳纳米管(MWCNTs).通过原位聚合的方法制备了修饰碳纳米管/硼酚醛树脂.使用3种碳纳米管改性的树脂制备了摩擦材料并研究了其摩擦性能.结果表明,修饰碳纳米管的加入,有助于提高摩擦材料摩擦系数的稳定性,减小磨损率,改善热衰退性.其中添加质量分数为1% 的MWCNTsBorate的情况改善最大,磨损率减小43.2%,摩擦系数和磨损率衰退率仅为10.3%和28.6%,摩擦表面保持完好.

Abstract:

Three kinds of carbon nanotubes,carboxylated carbon nanotubes (MWCNTsCOOH),diamino biphenyl methane modified carbon nanotubes (MWCNTsDDM) and boric acid modified carbon nanotubes (MWCNTsBorate),are prepared by covalent grafting method.The modified MWCNTs with phenolic resin (BPR) are composed by insitu polymerization.These modified carbon nanotubes (mMWCNTs) are added into the phenolic resinbased friction materials.The results show that the stability of the friction coefficient of friction material is improved,wear rate is reduced and thermal recession is improved after adding the mMWCNTs.1wt% of the MWCNTsBorate brings the largest improvement,wear rate is decreased by 43.2%,decline rate of the friction coefficient and wear rate are only 10.3% and 28.6%,also,the friction surface remains intact.