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A kind of self-repairing briquette gas sealing material and preparation method thereof

A self-healing and gas technology, applied in the coating and other directions, can solve the problems of easy cracking, poor flame retardancy, poor adhesion, etc., and achieve the effect of strengthening the coal body, good antistatic performance and low cost

Active Publication Date: 2017-03-08
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In summary, in view of the shortcomings of existing coal wall sealing materials such as easy cracks, poor cohesive force, and poor flame retardancy, the present invention provides a self-repairing coal wall gas sealing material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of a self-repairing type coal wall gas sealing material comprises the following steps:

[0037] (1) Preparation of self-healing carbon nanotube capsules: react toluene diisocyanate and dehydrated diethylene glycol in a nitrogen atmosphere at 80°C for 1-2 hours to obtain isocyanate-terminated polymers; carbon nanotubes Add the tubes to the above polymer, ultrasonically disperse the polymer into the carbon nanotubes, then put the filtered carbon nanotubes into absolute ethanol, react at room temperature for 1~2h to make the surface reaction solidify, filter and dry to obtain self-healing Carbon nanotube capsules.

[0038] (2) Preparation of prepolymer: First, stir the hydroxyl-terminated liquid polybutadiene rubber and polyethylene glycol in the temperature range of 90 ° C ~ 110 ° C for 2 ~ 4 hours, then cool down to 50 ° C ~ 60 ° C and add polyvinyl alcohol Methyl polyphenyl polyisocyanate and diphenylmethane diisocyanate react at about 85°C to prep...

Embodiment 2

[0044] A preparation method of a self-repairing type coal wall gas sealing material comprises the following steps:

[0045] (1) Preparation of self-healing carbon nanotube capsules: react toluene diisocyanate and dehydrated diethylene glycol in a nitrogen atmosphere at 80°C for 1-2 hours to obtain isocyanate-terminated polymers; carbon nanotubes Add the tubes to the above polymer, ultrasonically disperse the polymer into the carbon nanotubes, then put the filtered carbon nanotubes into absolute ethanol, react at room temperature for 1~2h to make the surface reaction solidify, filter and dry to obtain self-healing Carbon nanotube capsules.

[0046] (2) Preparation of prepolymer: First, stir the hydroxyl-terminated liquid polybutadiene rubber and polyethylene glycol in the temperature range of 90 ° C ~ 110 ° C for 2 ~ 4 hours, then cool down to 50 ° C ~ 60 ° C and add polyvinyl alcohol Methyl polyphenyl polyisocyanate and isophorone diisocyanate are reacted at about 85°C to pre...

Embodiment 3

[0052] A preparation method of a self-repairing type coal wall gas sealing material comprises the following steps:

[0053](1) Preparation of self-healing carbon nanotube capsules: react toluene diisocyanate and dehydrated diethylene glycol in a nitrogen atmosphere at 80°C for 1-2 hours to obtain isocyanate-terminated polymers; carbon nanotubes Add the tubes to the above polymer, ultrasonically disperse the polymer into the carbon nanotubes, then put the filtered carbon nanotubes into absolute ethanol, react at room temperature for 1~2h to make the surface reaction solidify, filter and dry to obtain self-healing Carbon nanotube capsules.

[0054] (2) Preparation of prepolymer: First, stir the hydroxyl-terminated liquid polybutadiene rubber and polyethylene glycol in the temperature range of 90 ° C ~ 110 ° C for 2 ~ 4 hours, then cool down to 50 ° C ~ 60 ° C and add diphenyl Methyl methane diisocyanate and isophorone diisocyanate are reacted at about 85°C to prepare a prepolym...

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Abstract

The invention discloses a self repairing coal wall gas closing material and a preparation method thereof. The self repairing coal wall gas closing material adopts a self repairing carbon nano tube capsule and a prepolymer as an A component and water glass, water-based amino resin, carbon black, surfactant, crosslinking agent and catalyst as a B component; during use, the self repairing coal wall gas closing material is mixed and smeared according to that a mass proportion of A component: B component is equal to 0.9 to 1.1:1. The self repairing carbon nano tube capsule is added in the preparation raw materials, so the self repairing coal wall gas closing material has an intelligent self repairing function. The self repairing coal wall gas closing material prepared by the method is good in leakproofness, can improve an extraction effect of gas, prevents the gas from entering a roadway, reduces dust and reinforces a coal body. The self repairing coal wall gas closing material is good in an adhering effect with walls, high in elongation, good in flame retardance, and good in electrostatic resistance, and suitable for gas leakage prevention of a coal wall, surface protection of the coal wall, reduction of the dust and other disposals.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety mining, in particular to a self-repairing type coal wall gas sealing material and a preparation method thereof. Background technique [0002] At present, during the mining process of coal mines, the coal wall is damaged and produces a large number of cracks and holes. Some of the loose coal walls will greatly reduce the gas extraction effect, and at the same time, the residual gas in the coal seam will enter the roadway through these pores. Seriously affected the safe production of coal mines. In order to solve this problem, it is necessary to seal the exposed coal wall. Inorganic materials are low in cost and non-toxic, but have poor toughness, are easy to crack, and have poor adhesion to the coal wall. Although organic materials have good elasticity, strong cohesive force, and good airtightness, the cost of materials is high and their flame retardancy is poor. Some materials also gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D7/12C08G18/48C08G18/62C08G18/54C08G18/12C08L75/08C08K3/04C08K3/26
Inventor 杨政鹏张春静刘玄陈小砖王运霞张春克管学茂
Owner HENAN POLYTECHNIC UNIV
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