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采用经十六烷基三甲基溴化铵有机改性的钠基蒙脱土(Na-OMMT)对间位芳香族聚酰胺(PMIA)进行改性,并采用刮涂法制得PMIA/Na-OMMT纳米复合薄膜,对复合薄膜的形貌结构及性能进行了表征.结果表明:当Na-OMMT质量分数小于等于1.5%时,Na-OMMT在 PMIA基体中的分散性较好;当 Na-OMMT质量分数为1.5%时,PMIA/Na-OMMT纳米复合薄膜的电压击穿强度为106.48 kV/mm,比纯 PMIA薄膜提高了26.73%,表面电阻率为1.25×1014Ω,体积电阻率为7.86 ×1015Ω· cm,均比纯 PMIA薄膜显著提高;随着Na-OMMT含量的逐渐增加,PMIA/Na-OMMT纳米复合薄膜的热膨胀系数减小,光学透过率逐渐减小,对紫外光的阻挡作用有较大提高,拉伸强度先增大后减小,当Na-OMMT质量分数为1.0%时,拉伸强度达到最大值,为108.12 MPa.“,”A meta-aromatic polyamide(PMIA)was modified by using cetyltrimethylammonium bromide-organically modified Na-montmorillonite(Na-OMMT)and was produced into PMIA/Na-OMMT nanocomposite film by scraping method.The morphol-ogy,structure and properties of the composite film were characterized.The results showed that Na-OMMT dispersed well in PMIA matrix when the mass fraction of Na-OMMT was not more than 1.5%; as compared with pure PMIA film, PMIA/Na-OMMT nanocomposite film had the breakdown strength of 106.48 kV/mm with a growth of 26.73%and the profoundly improved surface resistivity of 1.25×1014Ω and volume resistivity of 7.86×1015Ω· cm when the mass fraction of Na-OMMT was 1.5%; the thermal expansion coefficient of PMIA/Na-OMMT nanocomposite film was decreased,the optical transmittance was gradually de-creased,the ultraviolet blocking effect was greatly improved,the tensile strength was firstly increased and then decreased when the Na-OMMT content was gradually increased;and the tensile strength was maximized as 108.12 MPa when the mass fraction of Na-OMMT was 1.0%.