Halogen-free flame-retardant temperature controlled microcapsules and preparation method thereof

A technology of microcapsules and sols, applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve the problems of physical hazards, non-flammability of organic wall materials, etc., and achieve low equipment requirements, uniform particle size, and simple process Effect

Inactive Publication Date: 2015-05-27
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the phase change microcapsules studied are based on polymer resin as the wall material to coat the phase change mate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0048] Example 1

[0049] A halogen-free flame-retardant temperature-controlled microcapsule, which is composed of a core material and a wall material, the core material is liquid paraffin, and the wall material is inorganic material silicon dioxide. Calculated by mass ratio, wall material silicon dioxide: core material liquid paraffin is 1:1

[0050] The above-mentioned preparation method of a halogen-free flame-retardant temperature-controlled microcapsule specifically comprises the following steps:

[0051] (1) Mix and dissolve 6g of liquid paraffin, 0.33g of emulsifier, and 20g of distilled water to obtain an emulsion;

[0052] The emulsifier is calculated by mass ratio of sodium lauryl sulfate and Span-80, that is, sodium lauryl sulfate: Span-80 is compounded in a ratio of 0.5:2.8;

[0053] The consumption of liquid paraffin, emulsifier and distilled water is calculated by mass ratio Liquid paraffin: emulsifier: distilled water is 100:5.5:333;

[0054] (2) Stir th...

Example Embodiment

[0064] Example 2

[0065] A halogen-free flame-retardant temperature-controlled microcapsule, which is composed of a core material and a wall material, the core material is liquid paraffin, and the wall material is inorganic material silicon dioxide. Calculated by mass ratio, wall material silicon dioxide: core material liquid paraffin is 2:1.

[0066] The above-mentioned preparation method of a halogen-free flame-retardant temperature-controlled microcapsule specifically comprises the following steps:

[0067] (1) Mix and dissolve 6g of liquid paraffin, 0.33g of emulsifier, and 30g of distilled water to obtain an emulsion;

[0068] The emulsifier is calculated by mass ratio of sodium lauryl sulfate and Span-80, that is, sodium lauryl sulfate: Span-80 is compounded in a ratio of 0.5:2.8;

[0069] The amount of liquid paraffin, emulsifier and distilled water is calculated according to the mass ratio of liquid paraffin: emulsifier: distilled water is 100:5.5:500;

[007...

Example Embodiment

[0080] Example 3

[0081] A halogen-free flame-retardant temperature-controlled microcapsule, which is composed of a core material and a wall material, the core material is liquid paraffin, and the wall material is inorganic material silicon dioxide. Calculated by mass ratio, wall material silicon dioxide: core material liquid paraffin is 3:1.

[0082] The above-mentioned preparation method of a halogen-free flame-retardant temperature-controlled microcapsule specifically comprises the following steps:

[0083] (1) Mix and dissolve 6g of liquid paraffin, 0.33g of emulsifier, and 12g of distilled water to obtain an emulsion;

[0084] The emulsifier is calculated by mass ratio of sodium lauryl sulfate and Span-80, that is, sodium lauryl sulfate: Span-80 is compounded in a ratio of 0.5:2.8;

[0085] The amount of liquid paraffin, emulsifier and distilled water is calculated according to the mass ratio of liquid paraffin: emulsifier: distilled water is 100:5.5:200;

[008...

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Abstract

The invention discloses halogen-free flame-retardant temperature controlled microcapsules and a preparation method thereof. Each halogen-free flame-retardant temperature controlled microcapsule consists of a core material and a wall material, wherein the core material refers to liquid paraffin, the wall material refers to inorganic material silica, and the mass ratio of the wall material silica to the core material liquid paraffin is (1-3):1. The preparation method comprises the following steps: mixing, stirring and dissolving liquid paraffin, an emulsifier and distilled water, thereby obtaining emulsion; mixing ethyl orthosilicate, absolute ethyl alcohol and distilled water, regulating the pH value to 3-4, thereby obtaining silica-containing sol; adding the emulsion into the silica-containing sol, continuously stirring at a constant temperature for 2-3 hours, regulating the pH value to 5-6, aging at room temperature for 24 hours, stirring the obtained gel, performing suction filtration, washing, drying, thereby obtaining the halogen-free flame-retardant temperature controlled microcapsules. The halogen-free flame-retardant temperature controlled microcapsules have natural flame-retardant characteristic, and the formed microcapsules are uniform in granularity and have high conductivity and thermal stability.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant temperature-controlled microcapsule and a preparation method thereof. Background technique [0002] Phase change materials (Phase Change Materials, PCM) can be widely used in the fields of heat storage and temperature control by absorbing and releasing a large amount of heat during the phase transition process. It has been widely used in solar energy utilization, waste heat and waste heat recovery, and equipment heat dissipation. [0003] Phase change material microcapsule is a composite phase change material with a stable core-shell structure coated with a layer of stable performance on the surface of solid-liquid phase change material particles by using microcapsule technology, which solves the volume change and leakage problems when the solid-liquid phase change material phase changes , reduces the corrosion of phase change substances to equipment, improves the use efficiency of materials, bro...

Claims

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Application Information

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IPC IPC(8): C09K21/02C09K5/06B01J13/14
Inventor 宋晓秋付盼娟于翠徐单单叶琳徐生立赵敏
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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