以HNO3/H2SO4改性的多壁碳纳米管(CNTs)为原料,制备多壁碳纳米管(CNTs)/天然橡胶(NR)复合材料,研究了在NR中填充CNTs对其力学性能、动态性能、Payne效应、压缩生热和损耗因子的影响.结果表明:经HNO3/H2SO4混合酸改性的CNTs表面含有氢原子、含氧官能团和自由基,增强了大管径CNTs与橡胶基体间界面结合,如物理吸附、氢键作用、化学结合等.其结果是,随着CNTs管径的增大,对复合材料的补强作用增强,压缩温升小,其Payne效应也降低；损耗因子(tanδ)越大压缩温升越高;填充不同管径CNTs的份数越大,碳纳米管之间的平均距离减小,更易形成聚集体,其复合材料的Payne效应越大.
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