目的 通过片层蒙脱土(MMT)插层聚乙烯醇(PVA)来增强PVA复合膜的摩擦起电性能和电荷保持能力，进而增强PVA基摩擦纳米发电机(TENG)的电输出性能。方法 在3 000 r/min的高速机械搅拌下将蒙脱土进行剥离，然后与PVA粉末混合，在80 ℃、机械搅拌下溶解并流延成膜。以空白PVA膜为对照，测试MMT@PVA复合膜的介电常数和静止状态下的摩擦电荷耗散曲线，以表征掺杂蒙脱土的PVA复合膜的介电性和储电性。以PVA-PTFE基TENG为对照，测试MMT@PVA-PTFE基TENG的电输出性能，以表征MMT的掺杂对PVA复合膜摩擦起电性能的影响。结果 MMT的掺杂对PVA膜的介电性、摩擦起电性和电荷耗散性都有显著的影响。当的掺杂1%(相对于PVA的质量)的MMT后，PVA复合膜的介电常数增加了35%，电荷耗散率降低了46%，PVA基TENG的电输出增加了373%。MMT@PVA基TENG可以点亮868个LED灯，且具有稳定的电输出。结论 MMT的掺杂可以显著提升PVA膜的摩擦起电性和储电性，并且有助于提升PVA基TENG的电输出，这对于拓宽PVA基TENG在能量收集、可穿戴电子器件和生物传感领域具有现实意义。

The montmorillonite (MMT) intercalated polyvinyl alcohol (PVA) is used to enhance the triboelectric performance and charge retention ability of the PVA composite film, thereby enhancing the electrical output performance of the PVA-based triboelectric nanogenerator (TENG). The montmorillonite was peeled off under 3 000 r/min high-speed mechanical stirring, then mixed with PVA powder, dissolved at 80 ℃ under mechanical stirring and cast into a film. The blank PVA film was took as a control to test the dielectric constant of the MMT@PVA composite film and the triboelectric charge dissipation curve in the static state to characterize the dielectric and storage properties of the PVA composite film doped with montmorillonite; PVA -PTFE based TENG was used as a control to test the electrical output performance of MMT@PVA-PTFE based TENG to characterize the influence of MMT doping on the triboelectric performance of the PVA composite film. The doping of MMT has a significant effect on the dielectric properties, triboelectricity and charge dissipation of the PVA film. The experimental results show that when 1% of the PVA mass is doped with MMT, the dielectric constant of the PVA composite film is increased by 35%, the charge dissipation rate is reduced by 46%, and the electrical output of the PVA-based TENG is increased by 373%; MMT@PVA-based TENG can light up 868 LEDs and has a stable electrical output. The doping of MMT can significantly improve the triboelectricity and storage properties of PVA film, and help to increase the electrical output of PVA-based TENG, which is significant for broadening the fields of PVA-based TENG in energy harvesting, wearable electronic devices and biosensing.