Heat-generating material capable of withstanding high voltage, preparation method thereof, and self-heating deicing and anti-icing cable
A heating material and high-voltage-resistant technology, which is applied in the direction of insulating cables, cables, circuits, etc., can solve the problems of not being able to withstand high voltage, and achieve the effect of reducing weight and cost
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[0034] In another exemplary embodiment of the present invention, the method for preparing a heat-generating material capable of withstanding high pressure includes the steps of: mixing the surface-modified graphene and polyethylene uniformly at a mass percentage of 1-10% wt, at 180-210° C. After melt blending, a heat-generating material with a thickness of 0.1-5 mm is prepared, and silane cross-linking is performed to convert the polyethylene in the heat-generating material into silane-cross-linked polyethylene. Wherein, the melt blending can be carried out in an internal mixer, the rotating speed of the internal mixer can be 30-100 rpm / min, and the stirring time can be 5-60 min. Specifically, the surface-modified graphene and polyethylene are added to an internal mixer at a mass fraction ratio of 1-10% wt, melt-blended at 180-210° C. at 30-100 rpm / min, and stirred for 5-60 min. The mixture after melt-blending in an internal mixer is made into a film with a thickness of 0.1-5 ...
example 1
[0039] The surface-modified graphene and polyethylene were added to the mixer at 1%wt, 3%wt, 4%wt, 5%wt, 6.5%wt, and 10%wt respectively (ie, samples 1 to 6 in Table 1). , melt blending at 210°C, and mix at a stirring speed of 80rpm / min for 20min. The melt-blended mixture was digested in purified water at 100°C for 8 hours and dried at 60°C for 12 hours. The dried mixture was made into a rectangular sheet of 25*25*0.5mm, and a DC-plate electrode was used to carry out high voltage resistance and heating temperature experiments.
example 2
[0041] The surface-modified graphene and polyethylene were added to the mixer at 1%wt, 3%wt, 4%wt, 5%wt, 6.5%wt, and 10%wt respectively (that is, samples 7-12 in Table 1). , melt blending at 210°C, and mix at a stirring speed of 80rpm / min for 20min. The melt-blended mixture was digested in purified water at 100°C for 8 hours and dried at 60°C for 12 hours. The dried mixture was made into a rectangular sheet of 25*25*2mm, and a DC-plate electrode was used to perform high-voltage resistance and heating-up experiments.
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