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Preparation method for building thermal insulation particles

A particle and building technology, applied in the field of preparation of new building insulation particles, can solve the problems of reducing thermal conductivity and combustion performance, and organic heat insulation materials are easy to burn.

Active Publication Date: 2012-08-01
陕西盟创纳米新型材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems and deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing building heat insulating particles, which solves the problem that the existing organic heat insulating materials are extremely easy to burn, and the traditional organic heat insulating materials Modification, changing the combustion performance of the original substance while reducing its thermal conductivity, making it a non-combustible insulation material that meets the requirements of building insulation materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, prepare silica aerogel:

[0025] First mix the silica sol and the ethyl orthosilicate in a container at a mass ratio of 1:1, take 10 liters of the mixture and add 100 liters of ethanol to it, while stirring, add 1 kg of 30% diluted with 5 kg of water Ammonia solution, adjust the pH of the solution to 7, after the addition, continue to stir until the entire solution is clear and transparent (about 1 hour), seal the container and wait for the gel (about 4-8 hours). The aged gel is transferred to a supercritical drying equipment for supercritical drying, and the drying conditions are: temperature 290°C; pressure 23.5MPa (drying for about 10 hours), and the silica aerogel is obtained.

[0026] Second, the modification of polystyrene particles

[0027] Weigh 100g of polyphenylene particles (purchased from Xi'an Dingmei Thermal Insulation Material Co., Ltd.), soak in 50 liters of 1% dilute HF solution for 2 hours, and filter out; then soak in 50 liters of sodium lauryl sulfo...

Embodiment 2

[0030] The method of preparing silica aerogel in Example 1 was adopted to prepare silica aerogel first.

[0031] Weigh 100g polyphenyl particles (purchased from Xi’an Dingmei Insulation Materials Co., Ltd.), soak them in 50 liters of 1% dilute HF solution for 2 hours, and then filter them out; then soak them in 50 liters of sodium dodecyl sulfonate solution Filter out within hours; mix and grind 50 grams of silica aerogel and 400 grams of silica fine powder for 10 minutes, blend the mixed powder into the polystyrene particles that have been processed in two processes, and stir and mix until the mixed powder is completely wrapped It takes about 3 hours to dry the surface of polystyrene particles at 50°C.

[0032] Taking 100 grams of modified particles for performance test results: density 80 kg / m3, thermal conductivity 0.030w / m.k, belongs to Class A flame retardant material.

Embodiment 3

[0034] The method of preparing silica aerogel in Example 1 was adopted to prepare silica aerogel first.

[0035] Weigh 100g of polyphenylene particles (purchased from Xi’an Dingmei Thermal Insulation Material Co., Ltd.), soak in 1% dilute HF50 solution for 2 hours, and filter out; then soak in 50 liters of sodium dodecyl sulfonate solution for 2 hours Filter out; mix and grind 50 grams of silica aerogel and 400 grams of aluminum silicate powder for 10 minutes, blend the mixed powder into the polystyrene particles that have undergone two processes, and stir and mix until the mixed powder is completely wrapped Drying the surface of polystyrene particles at 90°C takes about 1 hour.

[0036] Taking 100 grams of modified particles for performance test results: density 100 kg / m3, thermal conductivity 0.026w / m.k, belongs to Class A flame retardant material.

[0037] B modification of polyurethane

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Abstract

The invention discloses a preparation method for building thermal insulation particles. The method comprises the following steps: firstly, weighing thermal insulation particles, dipping the thermal insulation particles in hydrofluoric acid solution, and filtering out the thermal insulation particles, secondly, dipping filtered matter in dodecyl sodium sulfate solution, and then filtering out the thermal insulation particles, thirdly, mixing and grinding aerogel and alumina silicate micro powder, fourthly, mixing the mixed powder in the third step into the filtered matter in the second step, and stirring and stirring the mixed powder and the filtered matter till the mixed powder completely packages the surface of the filtered matter, and fifthly, drying, so as to obtain the building thermal insulation particles. The method solves the problem that the conventional thermal insulation material is easy to burn, modifies traditional organic thermal insulation material, reduces the heat-transfer coefficient of the traditional organic thermal insulation material, and changes the combustion performance of the traditional organic thermal insulation material at the same time, so as to ensurethat the traditional organic thermal insulation material becomes incombustible thermal insulation material meeting the requirement of building thermal insulation material.

Description

Technical field [0001] The invention belongs to the field of building material preparation, and specifically relates to a method for preparing new building heat-insulating particles. Background technique [0002] Most of the building insulation materials on the market are organic, such as polyurethane foam, foamed polystyrene particles, and foamed phenolic. Although these organic materials are used as building insulation materials, they are very light, have good insulation effects and are cheap, but these materials are flammable Substances ignite when exposed to fire. Every time a fire caused by building insulation materials is a tragic and extreme fire, the use of such insulation materials makes people’s lives and property unprotected. However, fireproofing treatment on the basis of these organic thermal insulation materials, in addition to the better effect of phenolic board, is much more difficult for cheap and easily available polyurethane and polystyrene particles. The exis...

Claims

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Application Information

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IPC IPC(8): C04B28/24C04B16/08
Inventor 陈国张君
Owner 陕西盟创纳米新型材料有限责任公司
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