Low-voltage transparent electrothermal film

Abstract

The invention discloses a low-voltage transparent electrothermal film, including a transparent base material, a transparent conducting layer and electrodes. The transparent conducting layer is formed on at least one side of the transparent base material; the electrodes are formed by bus bars and inner electrodes, and the inner electrodes extend oppositely from the bus bars to form interdigital electrodes; the bus bars are connected with a positive electrode or a negative electrode of a power supply, so that the two adjacent inner electrodes are opposite in polarity, and in energization, current provided by the positive electrode bus bar flows from the positive inner electrodes into the corresponding negative inner electrodes and finally all converges into the negative electrode bus bar; and the electrodes are located on the transparent conducting layer and is in electrical contact with the transparent conducting layer. The low-voltage transparent electrothermal film is provided with the bus bars and the inner electrodes, an interval of two electrodes is reduced to enable resistance of the transparent conducting layer between the two electrodes to be reduced, thus low voltage can be used to supply power, and normally, the low-voltage transparent electrothermal film can be heated to 90 to 180 DEG C rapidly by adoption of voltage of a lithium battery of everyday use. Two sets of electrodes can be arranged on two sides of graphene, and the inner electrodes of the two sets of electrodes are staggered at a certain distance, thereby further ensuring heating uniformity, and improving heating temperature under the same low voltage.

Description

technical field [0001] The invention relates to a transparent electric heating film and a preparation process thereof, in particular to a low-voltage transparent electric heating film and a preparation method thereof. Background technique [0002] The transparent heating film is usually coated with a transparent conductive coating on the surface of the film, and then a conductive electrode is made on the surface of the conductive coating. The electrodes are usually two parallel metal strips. The two metal strips are respectively connected to the positive and negative poles of the power supply. The current flows through the transparent conductive coating. layers generate heat, such as figure 1 Shown (referring to the patent that publication number is CN103828482A). At present, the commonly used transparent conductive layers such as graphene, carbon nanotubes, ITO, FTO, AZO, etc. have a large sheet resistance when the film thickness is thin, which makes it necessary to use a ...

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Problems solved by technology

[0005] 2) The wire diameter of the conductive connection film is less than 5 μm, and it is easy to be burned when using conventional metal materials to make the electric heating film invalid.

However, patterned electrodes also use transparent conductive materials. Because transparent conductive materials have poor conductivity, it is difficult to obtain the effect of reducing the voltage after introducing patterned electrodes. Therefore, multi-layer (5-6 layers) graphene must be used to reduce resistance. Reduce the use of voltage

In addition, if two parallel electrodes are used instead of patterned electrodes, the heating uniformity obtained is poor, and the difference between the highest point and the lowest point of temperature is more than 60K, which is difficult to meet the practical requirements

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