Preparation method of carbon-containing polymer for preparing graphene three-dimensional structure powder material

Abstract

The invention discloses a preparation method of a carbon-containing polymer for preparing a graphene three-dimensional structure powder material, and belongs to the field of polymer synthesis. The preparation method comprises: (1) adding a cross-linking agent monomer and an initiator monomer to a polymerization monomer to obtain a monomer mixing phase, and adding a pore forming agent; (2) adding an aqueous solution to a reaction kettle, adding a dispersant, adding the monomer mixing phase to the reaction kettle in a dropwise manner, and carrying out a reaction; (3) cooling, washing and carrying out other operations to obtain a copolymer; and (4) removing the pore forming agent by using an extractant, and carrying out hydrolysis on the copolymer to obtain the carbon-containing polymer for preparing the graphene three-dimensional structure powder material. According to the present invention, the carbon-containing polymer has the following advantages that transition metal ions are easily incorporated so as to be subjected to low temperature graphitization, the three-dimensional graphene powder having the three-dimensional structure can be formed after the high temperature graphitization treatment, and the disintegration rate is more than 98%; and the method has advantages of high product purity, stable product quality, and easy operation.

Description

technical field [0001] The invention relates to the field of polymer synthesis, in particular to a method for preparing a carbon-containing polymer as a graphene three-dimensional structure powder material. Background technique [0002] Since A.K.Geim and K.S.Novoselov won the 2010 Nobel Prize in Physics for graphene materials in 2010, graphene has attracted widespread attention from scientists all over the world. Into the "Thirteenth Five-Year Plan", graphene has been listed as one of the strategic frontier materials by "Made in China 2025", and has become a key development direction in the field of new materials. [0003] Graphene is a two-dimensional crystal formed of hexagonally arranged planar carbon atoms, which is only one atomic layer thick. The main types are: single-layer graphene, double-layer graphene (2-layer spacing 0.34nm), few-layer graphene (3-10 layers), and more than 10 layers are graphite. Graphene has special properties; the hardness is 130GPa, and the...

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Problems solved by technology

Solvent stripping method: Under the action of strong ultrasound, a solvent is inserted between graphite layers to peel off, and graphene is prepared; disadvantages: the yield of preparation is very low, and it is not suitable for mass production

Disadvantages: very high processing temperature, expensive, low output, not suitable for industrial and large-scale production

The problem is that it is difficult to ensure sufficient conductivity and transparency because it adopts a structure that folds multiple tens of nanometers square pieces and cannot be completely restored.

In addition, the graphene synthesized by the above method is usually affected by van der Waals force or dangling bond effect. After being made into a powder sample, it is easy to accumulate or agglomerate, and it is easy to agglomerate into graphite flakes, which loses many excellent characteristics of the original graphene material. It needs to be dispersed in the stabilizer, the concentration is very low, the synthesis cost is high, and the process is complicated

Therefore, it is not conducive to the widespread use of graphene

In addition, the graphene specific surface area of ​​commercial powder samples is usually less than 100 m 2 / g, its synthesis cost is high and the process is complex

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