A kind of highly conductive foldable graphene film and its preparation method and application
A graphene film, high conductivity technology, applied in graphene, chemical instruments and methods, nano-carbon and other directions, can solve the problems of long time and high cost, and achieve the effect of ensuring the conductivity
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Embodiment 1
[0019] 1. Few-layer graphene (the number of layers of few-layer graphene sheets≤20 layers, the lateral size is 0.1-20um, the internal structure is complete, I D / I≤0.2), single-layer graphene oxide (full single-layer, oxygen-carbon ratio 1.8-2, lateral size 0.1-100um) and reducing agent hydrazine hydrate are uniformly mixed and dispersed in deionized water, wherein graphene (8.3 wt%), graphene oxide (1.0wt%), reducing agent (0.3wt%), the mixing time is 0.5h, and the rotation speed is 2000r / min.
[0020] 2. Lay the mixture on film and let it dry naturally.
[0021] 3. Low-temperature pressing of the obtained graphene film to obtain the final flexible and highly conductive foldable graphene film. The temperature of the hot pressing is 60 degrees centigrade, the time is 0.5 h, and the pressure is 20 MPa.
[0022] The prepared graphene film has a density of 2.0, an electrical conductivity of 1000 S / cm, can be folded more than 100,000 times, and its electrical conductivity decrea...
Embodiment 2
[0029] 1. (the number of layers of the few-layer graphene sheet is less than or equal to 20 layers, the lateral size is 0.1-20um, the internal structure is complete, I D / I≤0.2), single-layer graphene oxide (full single-layer, oxygen-carbon ratio 1.8-2, lateral dimension is 0.1-100um) and reducing agent hydroiodic acid are uniformly mixed, dispersed in deionized water, wherein, graphene ( 6.7%), graphene oxide (3.0%), reducing agent (0.7%), the mixing time is 2h, and the rotating speed is 200r / min.
[0030] 2. Lay the mixture on film and let it dry naturally.
[0031] 3. Low-temperature pressing of the obtained graphene film to obtain the final flexible and highly conductive foldable graphene film. The temperature of the hot pressing is 100 degrees centigrade, the time is 2 hours, and the pressure is 60 MPa.
[0032] The prepared graphene film has a density of 2.1, an electrical conductivity of 2000 S / cm, can be folded more than 100,000 times, and its electrical conductivity...
Embodiment 3
[0039] 1. (the number of layers of the few-layer graphene sheet is less than or equal to 20 layers, the lateral size is 0.1-20um, the internal structure is complete, I D / I≤0.2), single-layer graphene oxide (full single-layer, oxygen-carbon ratio 1.8-2, lateral size 0.1-100um) and reducing agent vitamin C are uniformly mixed and dispersed in deionized water, wherein graphene (7.5 %), graphene oxide (2.0%), reducing agent (0.4%); the mixing time is 1h, and the rotating speed is 1000r / min.
[0040] 2. Lay the mixture on film and let it dry naturally.
[0041] 3. Low-temperature pressing of the obtained graphene film to obtain the final flexible and highly conductive foldable graphene film. The temperature of the hot pressing is 80 degrees centigrade, the time is 1 h, and the pressure is 40 MPa.
[0042] The prepared graphene film has a density of 2.0, an electrical conductivity of 1200 S / cm, can be folded more than 100,000 times, and its electrical conductivity decreases by 16...
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Abstract
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