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Mono-layer graphite and polymer compound material and preparation and application thereof

A technology of single-layer graphite and composite materials, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, conductive/antistatic filament manufacturing, etc., can solve the difficulties in the preparation and purification of carbon nanotubes, difficulty in uniform dispersion, and cost Advanced problems, to achieve the effect of light weight, easy heat dissipation, good molding processability

Inactive Publication Date: 2009-03-11
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation and purification of carbon nanotubes are difficult, costly, and easy to agglomerate, making it difficult to disperse uniformly in the polymer matrix.

Method used

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  • Mono-layer graphite and polymer compound material and preparation and application thereof
  • Mono-layer graphite and polymer compound material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Single-layer graphite was prepared according to the method reported in the literature (Carbon, 2004, 42, 2929.). (The single-layer graphite is functionalized single-layer graphite containing carboxyl, hydroxyl and epoxy bonds). Add 1g of single-layer graphite (average diameter 1-2μm, thickness about 0.8nm) into water, and treat it with ultrasonic wave (500W) for 30 minutes to dissolve it completely; 5) Add 400ml of water and stir for 1 hour to fully dissolve. The above two aqueous solutions were mixed, stirred for 0.5 hours, and then treated with ultrasonic waves for 1 hour to disperse the single-layer graphite in the polymer to obtain a uniform and stable single-layer graphite / polyurethane mixed solution. The mixed solution was put into a ball mill (Nanjing University Instrument Factory, QM-QX omnidirectional planetary ball mill), and treated by ball milling (100 rpm) for 6 hours to obtain a polyurethane water-based coating containing single-layer graphite. The coati...

Embodiment 2

[0032] Single-layer graphite was prepared according to the method reported in the literature (Carbon, 2004, 42, 2929.). Add 100 mg of single-layer graphite into a 500 mL round bottom bottle, add 200 mL of DMF that has been distilled to remove water, protect it under nitrogen, and treat it with ultrasound (500W) for 1 hour to form a uniformly dispersed suspension. Add 100 mg of phenyl isocyanate, nitrogen protection, stir at room temperature for 10 hours, then undergo high-speed centrifugation (10000 rpm), and vacuum-dry. Uniformly dispersed phenylisocyanate-functionalized monolayer graphite was obtained. Add 100 mg of isocyanate-functionalized single-layer graphite into acetone and treat it with ultrasonic waves for 0.5 hour to completely dissolve it; fully dissolve 9.9 g of epoxy resin (Tianjin Resin Factory, type 618) in 100 mL of acetone. Then the two solutions were mixed, stirred for 2 hours, and treated with ultrasonic waves for 1 hour to disperse the single-layer graphi...

Embodiment 3

[0034] Single-layer graphite was prepared according to the method reported in the literature (Carbon, 2004, 42, 2929.). Calcining single-layer graphite at 400° C. for 2 hours under nitrogen atmosphere to obtain reduced single-layer graphite. Add 900 g of vacuum-dried polyethylene terephthalate (PET), 90 g of polybutylene terephthalate (PBT) and 10 g of single-layer graphite into a high-speed mixer, and mix for 30 minutes. Then the mixture is added into the twin-screw extruder through the metering pump, the screw speed is controlled at 60 rpm, the extrusion temperature is controlled at 230-250°C, after extrusion, drawing, and then pelletizing with a pelletizer, the compound Masterbatch. The masterbatch is dried in a vacuum oven, and injected into an injection molding machine to obtain a composite material product containing single-layer graphite. The thickness of this product is 1mm, and the electrical conductivity of the sheet is 3×10 -1 S / cm, which has good conductivity an...

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Abstract

The invention relates to a composite material of monolayer graphite and polymers, as well as a preparation method thereof. The composite material takes the monolayer graphite and the polymers as raw materials which are well mixed, wherein the weight portions of the raw materials are: 0.1 to 100 portions of the monolayer graphite and 0.1 to 100 portions of the polymers or other matrix materials. The preparation method is characterized by utilizing the excellent conductivity and large length-diameter ratio of the monolayer graphite to prepare conducting composite materials. Micro analysis proves that the monolayer graphite evenly disperses in the matrix materials, and a conducting network can be formed only by adding a small amount of the monolayer graphite, so as to obtain the conducting composite material with a plurality of forms. The composite material simultaneously has high strength and modulus, and is used in building, mechanical, aerospace and other special environments. In addition, as the monolayer graphite has excellent heat-conducting property, the composite material has the advantages of heat dissipation convenience and the like, and is expected to be applied to the precision instrument, microelectronic and other fields.

Description

technical field [0001] The invention relates to the manufacture of functional composite materials, in particular to a single-layer graphite and polymer composite material and a preparation method thereof. Background technique [0002] In 1907, the world's first synthetic polymer material, phenolic plastic, appeared. Due to the advantages of low price, good comprehensive performance, light weight, and good molding processability, polymer materials have been widely used in many fields such as electronics, machinery, construction, clothing, national defense, and military industry. The global output of polymer materials has surpassed that of metal materials in terms of volume, and has become one of the most widely used materials in the world. [0003] Most polymeric materials are very resistive (volume resistivity up to 10 12 —10 18 Ω·cm), it is easy to generate static electricity due to friction, induce electromagnetic interference and even cause an explosion. Therefore, pe...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L33/04C08L67/00C08L77/00C08L55/02C08L23/06C08L23/12C08L69/00C08L27/06C08L63/00C08L79/08C08L61/06C08L21/00C08K9/04H01B1/24C08J3/215C08J3/22B29B9/12B29B7/28B29C47/92D01F1/09
CPCC08J3/215C08K9/04
Inventor 陈永胜黄毅马延风梁嘉杰王燕张小岩许艳菲
Owner NANKAI UNIV
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