The tribocharges generated by the friction of the polymer material are temporarily stored on the interface, which allows the triboelectric nanogenerators (TENGs) to generate electrical output or produce electrostatic discharge on the polymer surface. Therefore, tribocharge regulation on the material surface is of considerable significance to improve the electrical output of TENGs or design new anti-static materials. A new method with universal applicability to control the triboelectrification of interface by photothermal materials is proposed in this study. In this method, the near-infrared (NIR) irradiation will cause the thermo electron emission of Fe₃O₄, thereby changing the charge amount on the PDMS surface. Results show that the surface potential of Fe₃O₄@PDMS is reduced by 76.8% after NIR excitation when the PDMS surface is positively charged. In addition, the surface potential increases by 42.9% when the surface of Fe₃O₄ is negatively charged, showing the opposite trend. Moreover, the friction coefficient of the polymer can be adjusted by modifying the surface triboelectricity to change its motion state. This strategy has many interesting applications, such as reducing the friction resistance of skis by reducing the surface charges or increasing the friction resistance by raising the charges on the surface of a car tire, thereby reducing the gliding distance during emergency braking.

聚合物材料摩擦产生的摩擦电荷暂时储存在界面上，这使得摩擦纳米发电机（TENGs）在聚合物表面产生电输出或静电放电。因此，材料表面的摩擦电荷调节对于提高TENGs的电输出或设计新的抗静电材料具有重要意义。本研究提出了一种具有普遍适用性的光热材料控制界面摩擦起电的新方法。在该方法中，近红外 (NIR) 照射会引起 Fe ₃ O ₄的热电子发射，从而改变 PDMS 表面的电荷量。结果表明，Fe ₃ O的表面电位₄当 PDMS 表面带正电时，在 NIR 激发后，@PDMS 减少了 76.8%。此外，当Fe ₃ O ₄表面带负电时，表面电位增加42.9% ，呈相反趋势。此外，聚合物的摩擦系数可以通过改变表面摩擦电来改变其运动状态来调节。这种策略有许多有趣的应用，例如通过减少表面电荷来降低滑雪板的摩擦阻力或通过提高汽车轮胎表面的电荷来增加摩擦阻力，从而减少紧急制动时的滑行距离。