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Preparation method of polymer/graphene nano composite material

A nano-composite material and graphene technology are applied in the field of preparation of polymer/graphene nano-composite materials, which can solve the problems of high cost, large consumption of organic solvents, large pollution, etc., and achieve the improvement of electrical conductivity and thermal stability. Simple and easy to use, the effect of reducing the amount of use

Active Publication Date: 2012-04-25
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two methods all need to consume a large amount of organic solvents, which are costly, polluting, and unsuitable for industrial production.
Although the melt blending method does not require the use of solvents, does not cause environmental pollution, and is widely used in industry, it is difficult to achieve good dispersion of graphene in the polymer by the melt blending method, and the obtained polymer / graphene nanocomposite properties The improvement is not obvious

Method used

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  • Preparation method of polymer/graphene nano composite material
  • Preparation method of polymer/graphene nano composite material
  • Preparation method of polymer/graphene nano composite material

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preparation example Construction

[0035] The invention provides a kind of preparation method of polymer / graphene nano composite material, comprises the following steps:

[0036] a) The first mass part polymer and graphene are fully mixed in an organic solvent, and after removing the organic solvent, a polymer / graphene master batch is obtained, and the graphene accounts for the first mass part polymer and graphite The mass percentage of the total amount of alkenes is 1% to 50%;

[0037] b) melt-blending the polymer / graphene masterbatch with the second mass part of polymer to obtain a polymer / graphene nanocomposite material.

[0038] The present invention first fully mixes the first mass part polymer and graphene in an organic solvent. During the mixing process, since graphene can maintain a delamination state in a solvent environment, in the obtained polymer / graphene master batch, Graphene can maintain monolithic or less lamellar state, uniformly dispersed in the first mass part polymer, and no agglomeration o...

Embodiment 1

[0068] Place the inner liner of the reaction kettle in a refrigerator at 0-4°C for 0.5h and then place it in the shell of a stainless steel reaction kettle, add 20g of cooled graphite, 80g of potassium permanganate and 600mL of Concentrated sulfuric acid, tightly capped and sealed, and placed at room temperature for 0.5h; then the reaction kettle was placed in a 100°C oven and heated for 1.5h to react, the obtained reaction product was poured into 10L deionized water, and the mass concentration was added to 30 % hydrogen peroxide is reduced to a golden yellow solution, then filtered, washed with dilute hydrochloric acid and deionized water to neutrality to obtain graphite oxide;

[0069] Disperse 10 g of the graphene oxide in 1000 g of water, and ultrasonically stir for 1 h to obtain a uniform colloidal solution; add 50 mL of ammonia water with a mass concentration of 25-28% to the colloidal solution, ultrasonically stir for 1 h, and continue to add 20 g of ammonia water with a...

Embodiment 2～8

[0072] After washing the graphene prepared in 10g of Example 1 with tetrahydrofuran, disperse it in 400mL tetrahydrofuran, obtain a graphene dispersion after ultrasonic and stirring for 2h; stir and dissolve 40g polylactic acid in 400mL tetrahydrofuran to obtain a polylactic acid solution; The polylactic acid solution was added to the graphene dispersion, and after ultrasonic and stirring for 1 hour, the obtained black mixture was dried at 50°C to remove tetrahydrofuran, pulverized into powder with a pulverizer, and then vacuum-dried at 80°C for 6 hours to obtain polylactic acid / Graphene masterbatch.

[0073] The polylactic acid / graphene masterbatch is mixed with polylactic acid, blended in an internal mixer at 170°C and a speed of 60rpm for 8min, and then press-molded by a flat vulcanizer at 180°C to obtain graphene The content is 0.02%, 0.04%, 0.08%, 0.2%, 0.5%, 1%, 2% polylactic acid / graphene nano composite material.

[0074] The polylactic acid / graphene nanocomposite mat...

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Abstract

The invention provides a preparation method of a polymer / graphene nano composite material, comprising the following steps: (a) sufficiently mixing a first mass part of polymer and graphene in organic solvent, and removing the organic solvent to obtain polymer / graphene master batches, wherein the graphene accounts for 1-50% of the total mass of the first mass part of polymer and the grapheme; and (b) melting and blending polymer / graphene master batches and a second mass part of polymer to obtain a polymer / graphene nano composite material. In the invention, firstly, the first mass part of polymer and the graphene are sufficiently mixed in the organic solvent, and the graphene can keep a delamination state in a solvent environment, therefore, the graphene can keep in a single-lamella or less-lamina state and is uniformly dispersed without agglomeration in the first mass part of polymer; and then the polymer / graphene master batches and the second mass part of polymer are melted and blended to obtain the polymer / graphene nano composite material.

Description

technical field [0001] The invention belongs to the technical field of graphene, in particular to a method for preparing a polymer / graphene nanocomposite material. Background technique [0002] Graphene is a new type of carbonaceous material in which a single layer of carbon atoms is arranged in a two-dimensional honeycomb lattice structure. It is considered to be the basic unit of all other dimensional carbonaceous materials, such as fullerenes that can be packed into zero dimensions. , rolled into one-dimensional carbon nanotubes, stacked into three-dimensional graphite, etc. Graphene is made of carbon atoms with sp 2 The monoatomic carbon layer formed by hybridization has a very stable structure and has excellent mechanical properties, peculiar electrical properties and good thermal properties. Studies have found that the Young's modulus of graphene can reach 11000GPa, the fracture strength can reach 125GPa, and the thermal conductivity The rate is up to 5000W / (m·K), an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/22C08L67/04C08L25/06C08L55/02C08L75/04C08L67/02C08L23/06C08L27/06C08L77/00C08L69/00C08K3/04
Inventor 胡源包晨露宋磊郭玉强
Owner UNIV OF SCI & TECH OF CHINA
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