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Phase change material temperature-sensitive coating as well as composite retarder and preparation method thereof

A temperature-sensitive aftercoating and phase-change material technology, applied in the field of composite inhibitors, can solve the problems of short resistance life, inability to effectively control the spontaneous combustion area of ​​goaf, poor stability, etc., to achieve increased hardness, inhibition of spontaneous combustion of coal, and prevention of fire the enlarged effect of

Active Publication Date: 2018-04-24
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: Aiming at the above-mentioned prior art, to provide a method for preparing a phase change material temperature-sensitive cell coat inhibitor shell, wrapping a layer of phase change material as a coat on the high-water composite inhibitor, which solves the problem of the existing inhibitor resistance. Problems such as short chemical life, poor stability, and inability to effectively control spontaneous combustion areas in goafs

Method used

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  • Phase change material temperature-sensitive coating as well as composite retarder and preparation method thereof
  • Phase change material temperature-sensitive coating as well as composite retarder and preparation method thereof

Examples

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preparation example Construction

[0024] The preparation of the temperature-sensitive cell coat of the phase change material includes the selection of the phase change material of the cell coat shell, the enhancement of the strength of the phase change material and the improvement of the ignition point, and the steps of putting the frozen inhibitor particles into the mixed cell coat phase change material.

[0025] Among them, the choice of temperature-sensitive cell coat shell materials.

[0026] After comparison and analysis, the physical properties of petrolatum, stearic acid and paraffin are compared, stearic acid and paraffin are selected as phase change materials, and their characteristics are analyzed below.

[0027] Vaseline is a semi-liquid mixture of alkanes or saturated hydrocarbons, also called petrolatum, which is obtained by fractional distillation of petroleum. Its state is between solid and liquid at room temperature; its melting point is 35-50°C.

[0028] The main component of paraffin wax is solid alk...

Embodiment 1

[0041] Table 1: Percentage of each component in Example 1

[0042]

[0043] With this composition, the resistance rate is 95%, the heat release rate per unit time is reduced by 70%, the ignition point is increased by 124 degrees, and the flame retardancy is greatly enhanced. The compressive strength is significantly enhanced, and the compressive strength of the composite material is increased by several hundred times compared with the paraffin-wax cell coat.

Embodiment 2

[0045] Table 2: Percentage of each component in Example 2

[0046]

[0047] With this composition, the resistance rate is 93%, the heat release rate per unit time is reduced by 60%, the ignition point is increased by 101 degrees, and the flame retardancy is greatly enhanced. The compressive strength is significantly enhanced, and the compressive strength of the composite material is increased by several hundred times compared with the paraffin-wax cell coat.

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Abstract

The invention discloses phase change material temperature-sensitive coating as well as a composite retarder and a preparation method thereof. A temperature-sensitive phase change material is used as acoating shell, the composite retarder with high water content is directly and externally coated with a composite phase change material, and the composite material takes phase change materials such asparaffin and stearic acid as matrix, uses glass fibers, polypropylene fibers and the like as aggregates and is prepared from flame retardant materials such as magnesium hydroxide, chlorinated paraffin, expanded graphite and glass beads. The phase change material temperature-sensitive coating improves the hardness and ignition point of the phase change material, enables coal briquettes not easy tobreak when falling down, and not only overcomes the defect that the traditional fire preventing and extinguishing retarder is easy to fail, but also well maintains the properties of the retarder; furthermore, the phase change material is more sensitive to temperature rise and can be melted before the critical temperature of coal spontaneous combustion, so that the retarder in the coating can be fully released so as to inhibit the coal spontaneous combustion. The preparation system adopts a modular design, is simple in structure and easy to operate, and can be used for efficiently producing and processing the retarder for the coating.

Description

Technical field [0001] The invention relates to the technical field of composite barrier compounds, in particular to a phase change material temperature-sensitive cell coat, composite barrier compounds and a preparation method thereof. Background technique [0002] Coal mine fires are the biggest disaster for coal mine safety in our country. The high-yield and high-efficiency technology of fully mechanized top coal caving in extra-thick coal seams has been vigorously promoted. Spontaneous combustion of residual coal in goafs frequently occurs in mines, and spontaneous combustion can easily cause gas combustion and explosion. Inhibitor prevention and control of coal spontaneous combustion technology is currently a commonly used fire-fighting technology. Inhibitors prevention and control of coal spontaneous combustion technology is currently commonly used fire-fighting technology. Generally, the configured inhibitor solution is sprayed directly into the goaf. However, this form of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/02C09K21/08E21F5/08
CPCC09K21/02C09K21/08E21F5/08
Inventor 蒋曙光崔传波高翔宇张卫清王凯吴征艳邵昊裴晓东夏翠萍郑思文唐海琳
Owner CHINA UNIV OF MINING & TECH
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