Preparation method of graphene oxide composite and preparation method of graphene composite
A composite material and graphene technology, applied in the field of preparation of new materials, can solve the problem of high production cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0035] Such as figure 1 The preparation method of the graphene oxide composite material of one embodiment shown, comprises the steps:
[0036] S110, ultrasonically dispersing graphite oxide in distilled water to obtain a graphene oxide dispersion.
[0037] Graphene oxide can be prepared by the improved Hummers method, specifically through the following steps: under ice bath conditions, 1g of graphite powder, 1g of sodium nitrate and 46mL of concentrated sulfuric acid are uniformly combined, and 6g of potassium permanganate is added to each 1g of graphite powder. , slowly add potassium permanganate, react for 1 hour while keeping the temperature not exceeding 20°C; then raise the temperature to 30°C-40°C and react for 1.5h, then slowly add 80mL of deionized water, while raising the temperature to 85°C-95°C, and react for 30min; Finally, lower the temperature to 60°C, add 80mL deionized water and 10mL hydrogen peroxide, and filter while hot after fully reacting, disperse the fi...
Embodiment 1
[0059] Preparation of graphite oxide: under ice bath conditions, mix 1g of graphite powder, 1g of sodium nitrate and 46mL of concentrated sulfuric acid evenly, and slowly add potassium permanganate according to the ratio of 6g of potassium permanganate (KMnO4) per 1g of graphite powder, and react 1h while keeping the temperature not exceeding 20°C. Then the temperature was raised to 35° C. for 1.5 h, and then 80 mL of deionized water was slowly added, while the temperature was raised to 90° C., and the reaction was carried out for 30 min. Finally, the temperature is lowered to 60°C, 80mL deionized water and 10mL hydrogen peroxide are added, the solution turns from brown to yellow, after the reaction is completed, filter while hot, disperse the filter cake in 5% dilute hydrochloric acid solution and centrifuge, and then use deionized water Centrifuge until the pH of the supernatant is 5, and the obtained filter cake is graphite oxide.
[0060] Preparation of a graphene oxide d...
Embodiment 2
[0077] The preparation of graphite oxide is the same as in Example 1.
[0078] Preparation of a graphene oxide dispersion: ultrasonically disperse graphite oxide in water to prepare a graphene oxide dispersion with a concentration of 1.5 mg / mL.
[0079] Surface modification of spherical copper powder: Take 0.5g of spherical copper powder and place it in a mixture of 50mL 3-aminopropyltriethoxysilane and isopropanol, ultrasonically disperse it evenly, reflux at 80°C for 20h, centrifuge and dry to obtain Surface-modified spherical copper powder. In the mixture of 3-aminopropyltriethoxysilane and isopropanol, the volume ratio of 3-aminopropyltriethoxysilane and isopropanol is 2:100.
[0080] Preparation of graphene oxide composite material: Take 0.3 g of surface-modified spherical copper powder and disperse it in 130 mL of water to obtain a dispersion of spherical copper powder. 20 mL of 1.5 mg / mL graphene oxide dispersion was added dropwise to the dispersion of spherical coppe...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Concentration | aaaaa | aaaaa |
| Particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More