通过超声分散制备了稳定的多壁碳纳米管分散液,并通过与环氧富锌底漆复配,获得了性能优异的碳纳米管/环氧富锌涂料。通过硬度、附着力、耐冲击、电化学以及耐中性盐雾等测试方法探讨了碳纳米管含量对环氧富锌涂层性能的影响。结果表明:碳纳米管的添加,有效地提高了涂层的铅笔硬度和附着力。涂层的防腐性能随着碳纳米管含量的增加,先增加后减小,当碳纳米管质量分数为0.3%时,涂层的性能达到最佳,此时铅笔硬度为4H、附着力为7.6MPa,其耐盐雾性能在1600h以上。
Carbon nanotubes(CNTs) filled epoxy zinc-rich coating was successfully prepared from a mixture of stable CNTs dispersion pretreated by ultrasonic and epoxy resin coatings through air spraying.The influence of CNTs content on the properties of the coating was investigated by hardness,adhesion test,impact resistance,electrochemical and neutral salt spray resistance test.The results showed that the pencil hardness and adhesion of the coating were improved by adding CNTs.The corrosion resistance of the coating increased first and then decreased with the increase of the CNTs content.The performance of the coating was optimal when the content of CNT was 0.3wt%.For the CNT (0.3wt%) filled epoxy zinc-rich coating,the pencil hardness was 4H,the adhesion force was 7.6MPa,and the salt spray resistance was more than 1600h.
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基金资助
中国石油化工股份有限公司委托研发项目(3317011-4)
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