Carbon quantum dot/polymer dielectric composite material and preparation method and application thereof
A technology of carbon quantum dots and composite materials, which can be applied to fixed capacitor dielectrics and components of fixed capacitors, etc., can solve the problems of difficult mass production and complex core-shell structure nanowire technology, and achieves the goal of improving energy storage density and efficiency. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0044] In Example 1, four groups of carbon quantum dots / polymer dielectric composite materials are provided, with PEI as the matrix, wherein the mass fractions of carbon quantum dots are 0.05wt%, 0.2wt%, 0.5wt%, and 1.0wt%, respectively.
[0045] The specific preparation method is:
[0046] The carbon quantum dots with an average diameter of 2.5 nm were prepared according to the mass ratio of the carbon quantum dots, respectively dispersed in N-methylpyrrolidone by ultrasound, dispersed for 10 min, and then added into PEI particles and heated at 70 °C. Stir for 12h. Finally, the solution was cast on a glass plate, dried at 80 °C for 24 h, and the glass plate was peeled off to obtain 4 groups of thin films with a thickness ranging from 11 to 16 μm, which were carbon quantum dots / polymer dielectric composites.
Embodiment 2
[0054] Carbon quantum dots with an average diameter of 2.5 nm were dispersed in ethanol solution by ultrasonic for 10 min, then melt-blended with PP at high temperature at 190 °C, and finally processed by biaxial stretching. In the electrical composite material, in the carbon quantum dots / polymer dielectric composite material, the mass fraction of carbon quantum dots is 0.2 wt %.
[0055] Figure 4 It is a photo of the carbon quantum dot / PP composite material obtained in Example 2, wherein Figure 4 (a) is a photograph of the product and Figure 4 (b) is a photograph of the biaxial stretching process. It can be seen that the sample has no obvious defects and the surface is smooth.
Embodiment 3
[0060] Carbon quantum dots with an average diameter of 2.5 nm were dispersed in N-methylpyrrolidone by ultrasound for 10 min, then PMMA particles were added and stirred at 70 °C for 12 h. Finally, the solution was cast on a glass plate, dried at 80°C for 24 hours, and the glass plate was peeled off. The obtained film was the carbon quantum dot / polymer dielectric composite material. The carbon quantum dot / polymer dielectric composite material, the carbon quantum dot / polymer dielectric composite material, The mass fraction of dots is 0.5 wt%. In the obtained composite dielectric film, the carbon quantum dots are uniformly dispersed, and the obtained dielectric film has no defects.
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| energy density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More