The electric heating coating with positive temperature coefficient (PTC) effect enables automatic control maximum temperature during heating, which can protect composite substrate with poor temperature resistant and save electrical energy. This functional coating was developed by adding multi-wall carbon nanotubes (MWCNTs) into polyurethane/paraffin composites. Conductivity and PTC effects of this coating were investigated by adjusting proportion of composition, such as MWCNTs mass fraction and PU/paraffin mass proportion. The coating with 8 wt% MWCNTs and 1:2 PU/paraffin composing proportion was evaluated best and was chosen as anti-icing/de-icing test sample. Temperature controlling capability was verified in electric heating experiments, and PTC phenomenon was explained by microstructural transition model. Moreover, this coating with PTC behavior showed excellent anti-icing/de-icing properties and had potentials for diverse anti-icing/de-icing industrial applications.

具有正温度系数（PTC）效果的电加热涂层可以自动控制加热过程中的最高温度，从而可以保护耐热性较差的复合基材并节省电能。通过将多壁碳纳米管（MWCNT）添加到聚氨酯/石蜡复合材料中来开发这种功能性涂层。通过调节组成比例，如MWCNTs质量分数和PU /石蜡质量分数，研究了该涂层的电导率和PTC效应。具有8 wt％MWCNT和1：2 PU /石蜡组成比例的涂层得到了最佳评估，并被选作防冰/除冰测试样品。通过电加热实验验证了温度控制能力，并通过微观结构转变模型解释了PTC现象。此外，