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Method for preparing meso-scale flaky vermiculite and heat-resistant polymer heat insulation composite membrane

A technology of high-temperature-resistant polymer and flaky vermiculite, which is applied in the field of preparation of mesoscopic-scale flaky vermiculite and high-temperature-resistant polymer heat-insulating composite film, can solve the problems of limited application and poor heat insulation performance, and achieve improved Maximum operating temperature, high performance, and low thermal conductivity

Inactive Publication Date: 2008-11-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The original high-temperature-resistant polymer material is polyarylethersulfone (hereinafter referred to as PES), its thermal conductivity is 0.086 / m·k or polyether sulfone ketone (hereinafter referred to as PPESK), its thermal conductivity is 0.076 / m·k, their thermal insulation properties are not good, which limits their application in thermal insulation materials

Method used

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  • Method for preparing meso-scale flaky vermiculite and heat-resistant polymer heat insulation composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see figure 1 The present invention can be divided into following steps:

[0026] Step 1. Use zirconia balls with a diameter of 2 to 3 mm to grind the raw vermiculite in a sand mill for 8 hours, then screen out the vermiculite with a particle size of less than 10 μm, and then dry it naturally;

[0027] Step 2. Soak the vermiculite obtained in step 1 in twice-distilled water, add 4 times the amount of dodecyltrimethylammonium chloride for cation exchange, and stir for 6 hours at a temperature of 80°C. Carry out organic expansion modification to the screened vermiculite;

[0028] Step 3, repeatedly washing the vermiculite obtained by step 2 with deionized water until there is no Br - , Cl - Exist, then dry naturally;

[0029] Step 4, taking the weight of the vermiculite obtained in step 3 as 100%, soaking it in 20 times of double distilled water, and then adding 20% ​​of sodium lauryl sulfate;

[0030] Step 5, use zirconia balls with a diameter of 1 mm to grind the ve...

Embodiment 2

[0036] Step 1, grind the raw vermiculite ore with a basket mill for 100 hours, then screen out the vermiculite with a particle size less than 10um, and then dry it naturally;

[0037] Step 2. Soak the vermiculite obtained in step 1 in twice-distilled water, add cetyltrimethylammonium bromide in an amount 8 times the amount of cation exchange, and stir for 100 hours at a temperature of 50°C. Carry out organic expansion modification to the screened vermiculite;

[0038] Step 3, repeatedly washing the vermiculite obtained by step 2 with deionized water until there is no Br - , Cl - Exist, then dry naturally;

[0039] Step 4, taking the weight of the vermiculite obtained in step 3 as 100%, soaking it in 10 times double distilled water, and then adding dispersant FZ100%;

[0040] Step 5, grind the vermiculite aqueous dispersion system obtained by step 4 with a basket mill for 2 hours, then process it 50 times with high-pressure micro-jet homogenization equipment, centrifuge, and...

Embodiment 3

[0046] Step 1. Grind the raw vermiculite with a pulverizer for 2 hours, then screen out the vermiculite with a particle size of less than 10um, and then dry it naturally;

[0047] Step 2. Soak the vermiculite obtained in step 1 in double distilled water, add docosyltrimethylammonium chloride in an amount of 1 times the amount of cation exchange, and stir and react for 12 hours at a temperature of 80°C , carrying out organic expansion modification to the screened vermiculite;

[0048] Step 3, repeatedly washing the vermiculite obtained by step 2 with deionized water until there is no Br - , Cl - Exist, then dry naturally;

[0049] Step 4, taking the vermiculite weight obtained by step 3 as 100%, dipping in 30 times of twice distilled water, then adding 30% of sodium hexametaphosphate;

[0050] Step 5. Grind the vermiculite obtained in step 4 with a pulverizer for 100 hours, then process it once with high-pressure micro-jet homogenization equipment, centrifuge, and vacuum-dry...

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Abstract

The invention provides a method for preparing mesoscale flaky vermiculite and high temperature polymer thermal insulation composite membrane. The invention adopts a technical proposal that primary mineral of vermiculite are ground to choose the part of vermiculite with a grain diameter less than 10 mu m; quaternary alkylammonium salt compound with a carbon chain of between 12 and 36 is used to modify the chosen vermiculite by organic expansion; a dispersing agent, grinding and a high-pressure homogenizer are adopted to treat the mesoscale flaky vermiculite; inorganic flaky vermiculite microcrystals are dispersed in organic high molecular polymer materials by using high temperature resistance polymer materials of poly(aryl ether sulfone) and poly(phthalazinone ether sulfone ketone) as continuous phrases and by methods of ultrasonic cell disruption, etc., and are formed into membranes by dry and wet methods. The products made by the method have extremely low heat conductivity, and excellent thermal insulation performance. Meanwhile, the composite membrane can be tightly covered on the surfaces of polysulfonamide and other fiber fabrics to improve the fireproof and thermal insulation properties, particularly the thermal insulation property of the fiber fabrics, can be used to make fire-protection clothing for safe access to fire ground or used as surface material for combat uniform.

Description

technical field [0001] The invention relates to a preparation method of a mesoscale flaky vermiculite and a heat-insulating composite film of a high-temperature-resistant polymer. Background technique [0002] A better way to prevent fire and heat insulation of fabrics is to use a coating method to form a heat insulation layer between the fabric and the outside world. The function of the heat insulation layer is to prevent heat from entering the removed space. The main characteristics it should have are: small thermal conductivity , small capacity, good high temperature resistance. [0003] Thermal conductivity k is one of the physical properties of matter. The size of its value reflects the strength of the thermal conductivity of the material, the larger the value, the stronger the thermal conductivity. Usually, the appropriate thermal conductivity material is selected according to the value of the thermal conductivity, and the material with a small thermal conductivity i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/06C08K9/00C08J5/18
Inventor 毛庆辉阚泓毛志平张琳萍徐红吴晓侠张璇马辉
Owner DONGHUA UNIV
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