Carbon-filler-filled polymer composite (CPC) films have become an important type of electric heating material. However, the development and application of CPC films are usually limited by the poor stability of polymer matrix, high cost of carbon fillers, or environmentally unfriendly process. Herein, we report a facile preparation of aramid-based electric heating films by aqueous mixing of commercially-available polymerization-induced aramid nanofiber (PANF) hydrogel and low-cost superconductive carbon black (SCB), followed by coating with heterocyclic aramid (HA) as an insulating layer to ensure safety and long-term use. The HA-PANF/SCB films show remarkable electric heating performance with high heating and cooling rates, rapid response to the change in voltage, good long-term stability, and excellent heating recyclability. The saturated temperature can be adjusted over a wide range (43–197 °C) using a low voltage below 36 V. Furthermore, the HA-PANF/SCB films also have superior flexibility, good thermal stability and self-extinguishing ability. Two sets of tests, finger warming using a power bank as the voltage supply and deicing, demonstrate that the HA-PANF/SCB electric heating films have broad prospects in a wide range of application fields.

碳填料填充聚合物复合材料（CPC）薄膜已成为一种重要的电热材料。然而，CPC薄膜的开发和应用通常受到聚合物基体稳定性差、碳填料成本高或环境不友好等因素的限制。在此，我们报告了一种通过将市售的聚合诱导芳纶纳米纤维 (PANF) 水凝胶和低成本超导炭黑 (SCB) 进行水性混合，然后涂上杂环芳纶 (HA) 来轻松制备芳纶基电热膜的方法作为绝缘层，确保安全和长期使用。HA-PANF/SCB薄膜表现出卓越的电热性能，具有高加热和冷却速率、对电压变化的快速响应、良好的长期稳定性和优异的加热可回收性。使用低于 36 V 的低电压可以在很宽的范围 (43–197 °C) 内调节饱和温度。此外，HA-PANF/SCB 薄膜还具有优异的柔韧性、良好的热稳定性和自熄性。以移动电源为电压源的指暖和除冰两组测试表明，HA-PANF/SCB电热膜在广泛的应用领域具有广阔的前景。