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A kind of flame retardant gas gel with infrared reflection function and preparation method thereof

An infrared reflection and airgel technology, applied in the direction of conjugated artificial filaments, fiber chemical characteristics, conjugated synthetic polymer artificial filaments, etc., can solve the limitations of mechanical properties and flame retardancy in the application of airgel, air condensation Glue has not been reported, low thermal conductivity and other problems, to achieve the effect of easy control and industrial production, excellent physical and mechanical properties and flame retardancy, low thermal conductivity

Inactive Publication Date: 2018-03-16
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, similar to organic foams, most organic aerogels are flammable and difficult to extinguish after burning. There is a great fire safety hazard, which severely limits their application in the thermal insulation protection market, especially in the building insulation market.
[0005] If an airgel has an infrared reflection function, its thermal insulation efficiency will be further improved on the basis of the low thermal conductivity of the airgel itself, but this kind of airgel has not been reported at home and abroad so far
At the same time, the contradiction between mechanical properties and flame retardancy severely limits the application of airgel in the field of thermal insulation.

Method used

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  • A kind of flame retardant gas gel with infrared reflection function and preparation method thereof
  • A kind of flame retardant gas gel with infrared reflection function and preparation method thereof

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Effect test

Embodiment 1

[0031] A method for preparing a flame-retardant polymer airgel with infrared reflection function, comprising the following steps:

[0032] Step 1, preparing a sodium alginate solution with a concentration of 4wt%, aniline solution with a concentration of 6wt%, and a new ammonium persulfate solution with a concentration of 5wt%; take 100g of the sodium alginate solution and pour it into the sodium alginate solution at 0°C Add 100g of aniline solution, stir for 3 hours to dissolve it, and obtain a mixed solution; at 0°C, add 100g of fresh ammonium persulfate into the mixed solution, and stir at 800r / min until the color of the solution turns black; then keep the temperature unchanged and let stand 24h, obtain hydrogel;

[0033] Step 2. Add the obtained hydrogel into a container with fresh deionized water for soaking and washing, and replace fresh deionized water every day for 5 days; the impurity in the hydrogel is removed during the soaking and washing process, so that only pol...

Embodiment 2

[0038] A method for preparing a flame-retardant polymer airgel with infrared reflection function, comprising the following steps:

[0039] Step 1, the preparation concentration is the sodium alginate solution of 4wt%, the aniline solution of 4wt% and the new ammonium persulfate solution of 2wt%; Add 100g of aniline solution, stir for 3 hours to dissolve it, and obtain a mixed solution; at 4°C, add 100g of fresh ammonium persulfate into the mixed solution, and stir at 1000r / min until the color of the solution turns black; then keep the temperature unchanged and let stand 24h, obtain hydrogel;

[0040] Step 2, add the obtained hydrogel into a container with fresh deionized water for soaking and washing, and replace fresh deionized water every day for 5 days; the impurity in the hydrogel is removed during the soaking and washing process, so that only polyaniline and sodium alginate;

[0041] Step 3, adding the soaked and washed hydrogel into a container filled with fresh ethano...

Embodiment 3

[0045] A method for preparing a flame-retardant polymer airgel with infrared reflection function, comprising the following steps:

[0046] Step 1, the preparation concentration is the sodium alginate solution of 4wt%, the aniline solution of 1.7wt% and the new ammonium persulfate solution of 1.7wt%; Add 100g of aniline solution into the solution, stir for 3 hours to dissolve it, and obtain a mixed solution; at 1°C, add 100g of fresh ammonium persulfate into the mixed solution, and stir at 1000r / min until the color of the solution turns black; then keep the temperature unchanged Stand still for 24h to obtain hydrogel;

[0047] Step 2, add the obtained hydrogel into a container with fresh deionized water for soaking and washing, and replace fresh deionized water every day for 5 days; the impurity in the hydrogel is removed during the soaking and washing process, so that only polyaniline and sodium alginate;

[0048] Step 3, adding the soaked and washed hydrogel into a containe...

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Abstract

The invention discloses a flame-retardant aerogel with infrared reflection function and a preparation method thereof. The preparation method comprises the following steps: polymerizing polyaniline in a sodium alginate water solution, inducing to form an aquagel, carrying out solvent washing, and carrying out freeze-drying or supercritical drying. The aerogel is prepared by performing hydrogen bond crosslinking on 20-80 wt% of polyaniline and the balance of flame-retardant sodium alginate. The method has the advantages of abundant raw material sources and low price. The obtained aerogel has the advantages of excellent mechanical properties, low density, high thermal-insulation efficiency, high infrared reflectivity, low heat conductivity coefficient, flame retardancy and the like, and has favorable application prospects in the field of thermal-insulation protection.

Description

technical field [0001] The invention belongs to the technical field of airgel material preparation, and in particular relates to an air-retarding airgel material with an infrared reflection function and a preparation method thereof. Background technique [0002] Insulation and protection materials play an indispensable role in many fields of national defense, military and civilian heat insulation, and their applications can be seen in aerospace vehicles, missile anti-insulation structures, architectural home decoration, and industrial heating equipment. At present, the common heat insulation materials on the market are mainly barrier heat insulation materials, which can achieve heat preservation effect by reducing heat conduction and heat convection. Most of them are organic polymer foams such as extruded polystyrene board (XPS), expanded polystyrene board (EPS), Polyurethane etc. The thermal insulation efficiency of this type of thermal insulation material is usually not h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08L5/04C08G73/02C08J9/28C08J3/24D01F8/16D01F8/18
CPCC08G73/0266C08J3/246C08J9/28C08J2201/0502C08J2305/04C08J2379/02C08J2405/04C08J2479/02C08L5/04C08L79/02C08L2201/02D01F8/16D01F8/18
Inventor 赵海波付志兵杨曦朱家艺王朝阳袁磊米睿张厚琼钟铭龙
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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