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A kind of sealant for heavy anti-corrosion containing graphene and preparation method thereof

A graphene and sealant technology, which is applied in the field of graphene-containing heavy-duty anti-corrosion sealant and its preparation, can solve problems such as threats to flight safety, corrosion of structural equipment, and degradation of sealant sealing performance, so as to ensure the sealing effect and improve Anti-corrosion grade, the effect of avoiding leakage sealing

Active Publication Date: 2019-09-03
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, sealants generally use liquid polysulfide rubber, fillers, accelerators, coupling agents and anti-fungal agents to blend to improve the anti-corrosion performance of sealants, but in some environments with relatively harsh external conditions, the sealing performance of sealants still exists. Significant declines in the environment lead to the infiltration of corrosive media, humid air or rainwater into the interior of the aircraft, resulting in corrosion of structures and equipment, which directly threaten flight safety; and sealants with heavy anti-corrosion functions can better ensure the safety of sealing. Based on this, improve the anti-corrosion effect, increase the sealing reliability, and prolong the life of the aircraft

Method used

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  • A kind of sealant for heavy anti-corrosion containing graphene and preparation method thereof
  • A kind of sealant for heavy anti-corrosion containing graphene and preparation method thereof
  • A kind of sealant for heavy anti-corrosion containing graphene and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The composition formula of a kind of heavy anti-corrosion sealant containing graphene is as shown in table 1:

[0036] Table 1.1 Formula composition of heavy anti-corrosion sealant

[0037]

[0038] Among them, graphene is modified as follows: firstly, γ-glycidoxypropyltrimethoxysilane coupling agent and γ-mercaptopropyltriethoxysilane are mixed at a mass ratio of 1:1, and reacted at 70°C After 2 hours, a mixed-type silane coupling agent was obtained, and then 0.5 parts by weight of a mixed-type silane coupling agent was dissolved in 100 mL of 95% ethanol aqueous solution, mixed with 4 parts by weight of graphene oxide in the form of a spray, and mixed at 70 ° C. Stir for 2 hours, and finally dry the filtered solid in a blast oven at 120° C. for 24 hours to obtain a modified product.

[0039] After weighing the components in component A and roughly mixing them in proportion, use a three-roll mill to mix them three times until they are uniform; after roughly mixing c...

Embodiment 2

[0055] The composition formula of high temperature and fuel resistant fluorosilicone sealant is shown in Table 2:

[0056] Table 2.1 Formula composition of heavy anti-corrosion sealant

[0057]

[0058] The modification of graphene is as follows: First, mix γ-aminopropyltriethoxysilane and γ-mercaptopropyltriethoxysilane at a mass ratio of 1:1, and react at 70°C for 2 hours to obtain a mixed silane Coupling agent, then take 0.7 parts by weight of mixed silane coupling agent and dissolve it in 100mL of 95% ethanol aqueous solution, mix it with 5 parts by weight of graphene oxide in the form of spray and stir at 70°C for 4h, and finally filter The final solid was dried in a blast oven at 120° C. for 24 hours to obtain a modified product.

[0059] After weighing the components in component A and roughly mixing them in proportion, use a three-roll mill to mix them three times until they are uniform; after roughly mixing component B, use a three-roll mill to mix them three time...

Embodiment 3

[0075] The composition formula of the heavy anti-corrosion sealant is shown in Table 1:

[0076] Table 3.1 Formula composition of heavy anti-corrosion sealant

[0077]

[0078]

[0079] Among them, graphene is modified as follows: firstly, γ-glycidoxypropyltrimethoxysilane coupling agent and γ-aminopropyltriethoxysilane are mixed in a mass ratio of 1:1, and reacted at 70°C After 2 hours, the mixed silane coupling agent was obtained, and then 0.55 parts by weight of the mixed silane coupling agent was dissolved in 100 mL of 95% ethanol aqueous solution, and mixed with 4 parts by weight of graphene oxide in the form of spraying. Stir for 3 hours, and finally dry the filtered solid in a blast drying oven at 120° C. for 24 hours to obtain a modified product.

[0080] After weighing the components in component A and roughly mixing them in proportion, use a three-roll mill to mix them three times until they are uniform; after roughly mixing component B, use a three-roll mill ...

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Abstract

The invention belongs to the field of sealants, and mainly relates to a graphene-containing sealant for heavy-duty corrosion prevention, which can be used for positions, which need corrosion prevention, of lapped interface gaps, opening covers and the like of an integral oil box, an oil bunker, a seat cabin, an airtight cabin and a body structure of an airplane, and a preparation method thereof. The graphene-containing sealant is prepared from a component A and a component B, wherein the component A is a basic cream, and is prepared from the following raw materials in percentage by weight: 0.1 to 3 percent of modified graphene, 20 to 50 percent of filling material, 1 to 5 percent of plasticizing agent, 0 to 5 percent of coupling agent and the balance of liquid polysulfide rubber; the component B is prepared from the following raw materials in percentage by weight: 30 to 60 percent of vulcanizing agent, 0.5 to 5 percent of accelerating agent, 0.5 to 5 percent of sulfur inhibitor and the balance of plasticizing agent.

Description

technical field [0001] The invention belongs to the field of sealants, and mainly relates to a graphene-containing heavy-duty anti-corrosion seal that can be used for aircraft integral fuel tanks, fuel tanks, cockpits and airtight compartments, airframe structure lap joint interface gaps and mouth covers, etc. agent and its preparation method. Background technique [0002] Sealant is an important material to ensure aircraft sealing and flight safety, and is also a key material for aircraft corrosion protection. At present, sealants generally use liquid polysulfide rubber, fillers, accelerators, coupling agents and anti-fungal agents to blend to improve the anti-corrosion performance of sealants, but in some environments with relatively harsh external conditions, the sealing performance of sealants still exists. Significant declines in the environment lead to the infiltration of corrosive media, humid air or rainwater into the interior of the aircraft, resulting in corrosion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/04C08K13/06C08K9/06C08K7/00C08K3/04C08K3/26C08K3/36
Inventor 于美超章谏正吴松华
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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