Dielectric high-dispersibility graphene nano hybrid material, preparation and application

A nano-hybrid material, graphene technology, applied in the fields of chemistry, biology, energy, and chemical industry, can solve the problems of cumbersome process, high cost, poor redispersibility, etc., and achieves simple preparation process, good stability, and low cost. Effect

Active Publication Date: 2020-01-24
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually, the graphene prepared by one-step ball milling method is single-electricity and does not have pH responsiveness; and the concentration of the obtained graphene dispersion is not high, and the redispersibility is not good
For example, the Chinese invention patent with the patent number CN107445148A mixes graphite and organic molecules with aniline groups by ball milling to prepare graphene sheets with amino groups on the surface; the Chinese invention patent with the patent number CN108529609A mixes graphene and sodium acetate and other substances Mixed ball milling prepared graphene sheets with carboxyl groups on the edges, which increased the hydrophilicity of graphene; the Chinese invention patent with the patent number CN106744900A mixed graphene powder and silane coupling agent in an organic solvent-water system. Heat stirring for grafting reaction, then ultrasonic dispersion, and then ball milling, concentration, and drying of the grafted graphene dispersion to obtain graphene with better dispersion, but the process is cumbersome and the cost is high

Method used

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  • Dielectric high-dispersibility graphene nano hybrid material, preparation and application
  • Dielectric high-dispersibility graphene nano hybrid material, preparation and application
  • Dielectric high-dispersibility graphene nano hybrid material, preparation and application

Examples

Experimental program
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Effect test

Embodiment 1

[0058] 1) Preparation of casein dispersion: Mix 10g casein and 85g deionized water, heat and stir at 50°C for 5h, then add 5g of 25% ammonia water, continue stirring at 50°C for 1h to dissolve casein, and obtain 10% casein Casein dispersion (ie 100mg / ml);

[0059] 2) Add the casein dispersion prepared in step 1) into a certain amount of deionized water and dilute to 1 mg / ml, and the pH is 10 at this time;

[0060] 300ml, 1mg / ml casein dispersion and 3g graphite were mixed, added to a 500ml stainless steel ball mill jar, ball milled at 185r for 30h, then the mixed solution was taken out, and centrifuged to obtain a double-charged graphene / casein nano-hybrid material; The yield of prepared graphene was 4.6%, and the graphene concentration was a dispersion of graphene / casein hybrid material of 0.46 mg / ml. The solid film prepared by drying the double-electric high-dispersion graphene nano-hybrid material is redispersed into water with a concentration of more than 2%; the thicknes...

Embodiment 2

[0062] Same as Example 1, except that 300ml, 1mg / ml casein dispersion and 3g graphite were mixed, added to a 500ml stainless steel ball mill jar, and ball milled at 185r for 5h. The yield of prepared graphene was 0.87%, and the concentration of graphene was 0.087mg / ml. The solid film prepared by drying the double-electric high-dispersion graphene nano-hybrid material is redispersed into water with a concentration of more than 2%; the thickness of the graphene sheet of the double-electric high-dispersion graphene nano-hybrid material is 1-20nm , the sheet size is 300nm-20μm.

Embodiment 3

[0064] Same as Example 1, except that 300ml, 1mg / ml casein dispersion and 3g graphite were mixed, added to a 500ml stainless steel ball mill jar, and ball milled at 185r for 10h. The yield of prepared graphene was 1.5%, and the concentration of graphene was 0.15 mg / ml. The solid film prepared by drying the double-electric high-dispersion graphene nano-hybrid material is redispersed into water with a concentration of more than 2%; the thickness of the graphene sheet of the double-electric high-dispersion graphene nano-hybrid material is 1-20nm , the sheet size is 300nm-20μm.

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Abstract

The invention discloses a dielectric high-dispersibility graphene nano hybrid material, preparation and application. The dielectric high-dispersibility graphene nano hybrid material consists of a dielectric protein and graphene through combination. The dielectric high-dispersibility graphene nano hybrid material can be stably dispersed with a high concentration in water, and the prepared dielectric high-dispersibility graphene nano hybrid material disclosed by the invention has dielectric properties, pH responsiveness and good redispersibility, and has wide application in aspects such as composite materials, functional materials and intelligent nanomaterials.

Description

technical field [0001] The invention relates to a dual-electricity highly dispersed graphene nano-hybrid material prepared by a ball milling method, its preparation and application, and belongs to the field of two-dimensional polymer materials, and also belongs to the fields of chemistry, chemical industry, energy and biology. Background technique [0002] Graphene is a two-dimensional carbon nanomaterial with a hexagonal honeycomb lattice structure composed of carbon atoms in sp2 hybrid orbitals. Due to its unique single-atom structure, it has very excellent properties, such as high specific surface area, highest mechanical strength, excellent electrical and thermal conductivity, and good light transmission and gas barrier properties. There are many methods for the preparation of graphene, among which the liquid phase exfoliation method is to disperse graphite into a specific solvent or surfactant, and directly exfoliate single-layer or multi-layer graphene from the graphit...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08K3/04C09K5/02
CPCC08K3/04C08K3/042C09K5/02C08L89/005
Inventor 张建明胡佳伟段咏欣黄莎莎侯家瑞
Owner QINGDAO UNIV OF SCI & TECH
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