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Method for preparing three-dimensional graphene microstructure filler modified polymer composite

A technology for composite materials and polymers, which is applied in the field of preparing polymer composite materials modified by three-dimensional graphene microstructure fillers, which can solve the problems of limited shape and size, difficulty in preparing size molding structures, etc., and achieve less structural defects and prevent flakes The effect of overlapping layers and excellent wear resistance

Inactive Publication Date: 2019-03-01
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In these methods, the graphene form is required to be a complete foam porous structure, and its foam skeleton structure is still maintained in the polymer composite, so the final polymer composite structure is limited by the shape and size of the graphene foam used. (generally sheet foam with a thickness of less than 2 mm), which makes it difficult to prepare products with large dimensions (thickness>>1cm) or complex molding structures by these methods

Method used

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  • Method for preparing three-dimensional graphene microstructure filler modified polymer composite
  • Method for preparing three-dimensional graphene microstructure filler modified polymer composite
  • Method for preparing three-dimensional graphene microstructure filler modified polymer composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of method for preparing graphene / thermosetting polymer composite material, realizes by following scheme:

[0037] (1) Weigh 0.05 g of graphene foam prepared by chemical vapor deposition method, and 10 g of epoxy resin (diglycidylether of bisphenol A, DGEBA). Place them in a 50ml beaker and heat to 70°C. Stir with a polytetrafluoroethylene stir bar for 5 minutes at a rate of 10 rpm. Add 0.4 g of curing agent (2-ethyl-4-methylimidazole), and then stir slowly for 0.3 minutes.

[0038] (2) Put the mixture obtained in step (1) into a mold, heat at 80 degrees Celsius for 4 hours, and at 170 degrees Celsius for 1 hour, and cool to room temperature with the furnace to obtain a graphene / thermosetting polymer composite material.

[0039] Through analysis: the graphene filler is uniformly dispersed in the composite material, with a size of 50-200 μm, such as figure 1 Shown is the OM photograph of the graphene / thermosetting polymer composite material that present embodime...

Embodiment 2

[0044] A kind of method for preparing graphene / thermosetting polymer composite material, realizes by following scheme:

[0045] (1) Graphene foam 0.05g prepared by vapor deposition method, epoxy resin (DGEBA) 5g and 15g acetone are placed in a 50ml beaker, with a speed of 60 revs / min, stirred for 10 minutes with a polytetrafluoroethylene stirrer, After removing acetone, 0.4 g of a curing agent (2-ethyl-4-methylimidazole) was added, followed by gentle stirring for 0.3 minutes.

[0046] (2) Put the mixture obtained in step (1) into a mold, heat at 80 degrees Celsius for 4 hours, and at 170 degrees Celsius for 1 hour, and cool to room temperature with the furnace to obtain a graphene / thermosetting polymer composite material. The abrasion resistance test of composite materials is shown in Table 1.

Embodiment 3

[0048] A kind of method for preparing graphene / thermoplastic polymer composite material, realizes by following scheme:

[0049] Add 1 g of polyurethane to 8 ml of N,N-dimethylformamide, then add 5 mg of graphene foam, and stir for 10 minutes at a rate of 20 rpm. The N,N-dimethylformamide was removed by evaporation to obtain a graphene / thermoplastic polymer composite.

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Abstract

The invention belongs to the technical field of composite preparation, and particularly relates to a method for preparing a three-dimensional graphene microstructure filler modified polymer composite.The method comprises the following steps that graphene foam and a polymer liquid medium are added to a vessel and subjected to mechanical stirring, and the graphene foam is crushed to obtain a mixedsuspension; and the mixed suspension is subjected to exhausting, precipitation, cooling or a method of directly initiating polymerization to obtain the three-dimensional graphene microstructure fillermodified polymer composite. The graphene filler has a special three-dimensional microstructure which has a large radius-thickness ratio and a presence form of an sheet-like irregular hollow tube different from the sheet shape of usual graphene; and meanwhile, the shape and processing method of the polymer composite are not limited by the size and form of the adopted graphene foam, and the polymercomposite has molding diversity and industrial feasibility.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a method for preparing a polymer composite material modified by a three-dimensional graphene microstructure filler. Background technique [0002] Graphene is composed of carbon atoms with SP 2 The hybrid orbitals form hexagonal sheets in a honeycomb lattice, and its unique crystal structure gives it excellent properties. Studies have shown that graphene is currently the thinnest but also the hardest nanomaterial in the world. Its Young's modulus is about 1100GPa and its strength can reach 130GPa; it is almost completely transparent and only absorbs 2.3% of light; the electron transfer rate at room temperature exceeds 15000cm 2 / V·s, while the resistivity is only about 10 -6 Ω·cm; specific surface area is 2600m 2 / g; thermal conductivity up to 5300W / mK, etc. This series of properties of graphene makes it very attractive in the field of polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L75/04C08L53/02C08L71/02C08K7/24
CPCC08K7/24C08L63/00C08L75/04C08L53/025C08L71/02
Inventor 杜续生周何乐子莫由天
Owner JINAN UNIVERSITY
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