A graphene-nickel composite conductive anticorrosion polysulfide sealant

A polysulfide sealant, composite conductive technology, applied in conductive adhesives, adhesives, adhesive additives, etc., can solve the problems of poor medium resistance and corrosion resistance, achieve good medium resistance, improve conductivity, particle size, etc. small diameter effect

Active Publication Date: 2017-03-22
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous invention patents, most of the conductive sealants are based on silicone and epoxy. These glues have poor medium resistance and corrosion resistance and cannot meet new needs.

Method used

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  • A graphene-nickel composite conductive anticorrosion polysulfide sealant
  • A graphene-nickel composite conductive anticorrosion polysulfide sealant
  • A graphene-nickel composite conductive anticorrosion polysulfide sealant

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The preparation of component A and component B is mixed with a three-roll mill, and each component is weighed according to the proportion, then roughly mixed and then mixed with a three-roll mill for 3 times before use;

[0019] Component A and Component B are kept separately.

[0020] The preparation method of the graphene-nickel composite conductive filler in the high-conductivity anti-corrosion polysulfide sealant as described above is characterized in that: graphene and metal nickel powder are mixed and stirred in 95% ethanol aqueous solution, and silane coupling is added in the process. The coupling agent is reacted at a temperature of 50°C to 60°C for 4h to 6h, and then filtered and dried to obtain the product, wherein graphene is highly conductive graphene with layers within 10 layers, preferably graphene with layers within 5 layers; metal nickel powder is granular Powder with a diameter of 5 microns; the silane coupling agent has the following structure: HS(CH ...

Embodiment 1

[0022] Embodiment 1: Sealant 1 is a kind of sealant used for the antistatic sealing of aircraft fuel tank, and is made up of component A base paste and component B vulcanized paste, component A is base paste, and component B is vulcanized paste, and its Composition formula is as shown in table 1:

[0023] Formulation composition of table 1 sealant 1

[0024]

[0025] Wherein the synthesis steps of the graphene-nickel composite conductive agent are as follows: take 2 parts by weight of graphene and 200 parts by weight of metal nickel powder with a layer number of about 5 layers, disperse them in 200 mL of 95% ethanol aqueous solution, heat to 50 ° C, Then 0.2 parts by weight of γ-mercaptopropyltrimethoxysilane was added dropwise, stirred for 4 hours, and then filtered, and the obtained solid was dried in a blast drying oven at 90° C. for 2 hours to obtain the product.

[0026] Both the base paste and the vulcanizing paste are prepared by mixing with a three-roll mill, then ...

Embodiment 2

[0028] Sealant 2 is a sealant used for electromagnetic shielding of equipment compartments. It is composed of component A base paste and component B vulcanized paste. Component A is the base paste and component B is the vulcanized paste. 2 shows:

[0029] Formulation composition of table 2 sealant 2

[0030]

[0031]

[0032]Wherein the synthesis steps of the graphene-nickel composite conductive agent are as follows: Weigh 2 parts by weight of graphene and 200 parts by weight of metal nickel powder, disperse them in 200 mL of 95% ethanol aqueous solution, heat to 60 ° C, Then 0.3 parts by weight of γ-mercaptopropyltriethoxysilane was added dropwise, stirred for 5 hours, and then filtered, and the obtained solid was dried in a blast drying oven at 90° C. for 4 hours to obtain the product.

[0033] Both the base paste and the vulcanizing paste are prepared by mixing with a three-roll mill, then weighed according to a weight ratio of 100:8, mixed by hand for 5 minutes, and...

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Abstract

The invention belongs to the technical field of polymer material sealants, and relates to a graphene-nickel composite conductive anticorrosion polysulfide sealant. The polysulfide sealant includes a component A that is base paste and a component B that is vulcanization paste, wherein the component A is base paste and the component B is vulcanization paste. A graphene-nickel composite filler is adopted as a conductive agent and can allow the sealant to have a high conductivity. The sealant can have excellent corrosion resistance through adoption of the graphene. A coupling agent compositing technique is adopted to prepare the graphene-nickel composite conductive agent as a conductive filler of the sealant, a highly conductive composite material is prepared, agglomeration in a process of mixing graphene and liquid polysulfide rubber is overcome, and good dispersion and uniform distribution of the graphene in the liquid polysulfide rubber are achieved. The graphene is low in particle size, and can fill nickel powder well, thus increasing the conductive contact area. The high conductivity of the graphene is utilized, the graphene and the nickel powder form a conductive system, and the contact resistance is reduced from 0.8 to 0.03-0.01 omega.

Description

technical field [0001] The invention belongs to the technical field of polymer material sealants, and relates to a graphene-nickel composite conductive anti-corrosion polysulfide sealant. Background technique [0002] Polysulfide sealant refers to liquid polysulfide rubber as the base material, which can be chemically cross-linked at room temperature or under heating to form a good adhesion to the surface of metal or other materials by mixing various powder materials. Elastic sealing material. The liquid polysulfide rubber referred to above is mainly the G series products produced by Akzo Nobel Sulfur Rubber Company, or the LP series products produced by Toray Corporation of Japan, or the JLY series products produced by Liaoning Jinxi Chemical Research Institute. Because polysulfide sealants have good fuel resistance, water resistance and weather resistance, they have been widely used in aircraft overall fuel tank seals, watertight cabin seals, bridge anti-corrosion seals, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J181/04C09J9/02C09J11/04
CPCC08K3/04C08K3/08C08K9/06C08K13/06C08K2003/0862C08L2205/025C09J9/02C09J11/04C09J181/04C08L81/04
Inventor 章谏正全燕南吴松华
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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