Using highly conductive reduced graphene oxide (rGO) as a conductive filler,polyethylene oxide (PEO) as a binder and N-methyl-2-pyrrolidone (NMP) as a solvent,a conductive slurry was prepared.Then,the conductive slurry was cured at high temperature by solution coating method to obtain polyethylene oxide/reduced graphene oxide (PEO/rGO) composite electrothermal films.X-ray diffraction,scanning electron microscopy and Fourier transform infrared spectroscopy were used to analyze and characterize the prepared composite electrothermal films.The electrical and the electrothermal properties were also tested.The results showed that the square resistance of PEO/rGO composite electrothermal films gradually decreased with the increase of rGO content,and its rate of decrease slowed down as the content increased.The heating rate of PEO/rGO composite electrothermal films gradually decreased with the increase of rGO content.When the rGO content was high and the PEO content was low,it resulted in a decrease in heating rate and an instability of the electric heating platform.When the mass fraction of rGO was 20%,the composite electrothermal film could quickly heat up to 43℃ under an applied DC voltage of 18 V,and exhibit a stable electric heating platform and high electric heating efficiency,which met the service requirements of low temperature and high efficiency composite electrothermal films.
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基金资助
华能集团总部科技项目“风电机组叶片高效防除冰关键技术研究与应用”(HNKJ22-H101);陕西省自然科学基础研究计划(2023-JC-QN-0104)
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