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Preparation method of carbon fiber low-density composite sound absorbing plate for buildings

A composite material and carbon fiber technology, applied in the field of new materials, can solve the problems of a lot of precious living space, low sound insulation efficiency, difficult installation, etc., and achieve the effect of easy mass production, good corrosion resistance, and good sound absorption effect.

Inactive Publication Date: 2019-02-22
XINGHUA PRECISION CASTING & FORGING IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Some sound-absorbing panels on the market are made by installing rubber layers, vibration-absorbing materials or sound-insulating felts between two panels. Using this method, the sound insulation effect can be improved to a certain extent in the short term, but the sound insulation effect will decrease. decrease over time
As we all know, materials such as rubber will slowly age in the air, causing them to gradually harden and lose their elasticity, resulting in a gradual decrease in sound insulation over time
On the other hand, the method of installing a rubber layer or a sound-insulating felt layer between the two boards is also very expensive.
[0004] There are some ordinary sound-absorbing panels on the market. In order to improve the sound insulation effect, it is realized by increasing the thickness and weight of the wall panel. Although this method can improve the sound insulation effect to a certain extent, it brings many disadvantages: 1) Sound insulation efficiency (That is, the improvement of sound insulation) is low, because according to the laws of physics, if the surface density of the board is doubled, its theoretical sound insulation can only increase by 6 decibels at most;
2) The thicker the wallboard, the more space it takes up, and the more valuable living space people lose
3) The heavier the wallboard, the more difficult it is to install; and if the wallboard is too heavy, it is also necessary to consider whether the floor can bear it
4) The thicker and heavier the wallboard, the more raw materials used to produce the wallboard, the higher the price of the wallboard, the higher the installation cost, and the higher the value of the lost living space, resulting in a higher comprehensive cost of the final project

Method used

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  • Preparation method of carbon fiber low-density composite sound absorbing plate for buildings

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Experimental program
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Effect test

Embodiment 1

[0024] Step 1: Use carbon fiber needled body as the prefabricated body material, and the density of the prefabricated body is controlled at 0.08 g / cm 3 , the carbon fiber is PAN-based carbon fiber, the number of tows is 1K, and the needle density is 10 needles / cm 2 , the carbon fiber length is controlled at 5mm-100mm.

[0025] Step 2: Configure the resin impregnation solution, mix and stir the resin and alcohol according to a certain ratio, the mixing ratio is resin: alcohol = 1:4, the resin is epoxy resin, the alcohol is industrial alcohol, the purity is ≥ 95%, and the mixture is evenly stirred.

[0026] Step 3: pressurize and impregnate the resin impregnating solution prepared in step 2 into the body of the prefabricated body under a pressure of 0.8 MPa for 1 hour.

[0027] Step 4: Put the green body after the impregnation treatment in Step 3 into a curing furnace for curing treatment. The curing temperature is 110° C., the curing temperature rise rate is 5° C. / h, and the t...

Embodiment 2

[0031] Step 1: Use carbon fiber needled body as the prefabricated body material, and the density of the prefabricated body is controlled at 0.10 g / cm 3 , the carbon fiber is PAN-based carbon fiber, the number of tows is 3K, and the needle density is 20 needles / cm 2 , the carbon fiber length is controlled at 5mm-100mm.

[0032] Step 2: Configure the resin impregnation solution, mix the resin and alcohol in a certain proportion, the mixing ratio is resin: alcohol = 1:6, the resin is phenolic resin, the alcohol is industrial alcohol, the purity is ≥95%, and the mixture is evenly stirred.

[0033] Step 3: pressurize and impregnate the resin impregnating solution prepared in step 2 into the body of the preform under a pressure of 2.0 MPa for 2 hours.

[0034] Step 4: Put the green body after the impregnation treatment in Step 3 into a curing furnace for curing treatment. The curing temperature is 150° C., the curing temperature rise rate is 10° C. / h, and the temperature is kept fo...

Embodiment 3

[0038] Step 1: Use carbon fiber needled body as the prefabricated body material, and the density of the prefabricated body is controlled at 0.15g / cm 3 , the carbon fiber is PAN-based carbon fiber, the number of tows is 12K, and the needle density is 40 needles / cm 2 , the carbon fiber length is controlled at 5mm-100mm.

[0039] Step 2: Configure the resin impregnation solution, mix the resin and alcohol in a certain proportion, the mixing ratio is resin: alcohol = 1:10, the resin is epoxy resin, the alcohol is industrial alcohol, the purity is ≥ 95%, and the mixture is evenly stirred.

[0040] Step 3: pressurize and impregnate the resin impregnating solution prepared in step 2 into the body of the preform under a pressure of 4.0 MPa for 10 hours.

[0041] Step 4: Put the green body after the impregnation treatment in Step 3 into a curing furnace for curing treatment. The curing temperature is 200° C., the curing temperature rise rate is 20° C. / h, and the temperature is kept fo...

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Abstract

The invention discloses a preparation method of a carbon fiber low-density composite sound absorbing plate for buildings. A short fiber needled body is used as a preform framework, and hardening tretament is performed with resin impregnation, curing and carbonization processes. The method comprises the steps as follows: 1, using the carbon fiber needled body as a preform material; 2, preparing a resin impregnation liquid; 3, performing resin impregnation; 4, performing curing treatment; 5, performing carbonization treatment; 6, performing machining to prepare the carbon fiber low-density composite sound absorbing plate for buildings. The low-density porous carbon / carbon sound-absorbing plate uses carbon fiber as the framework and a resin carbon matrix as a refinement and has the advantagesof being good in waterproof, fireproof, anti-aging and anti-shock capacity, low in energy consumption, environmentally friendly, free of environmental pollution after being abandoned, good in sound absorbing effect during use and the like.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a corrosion-resistant, anti-aging, low-density composite material sound-absorbing plate. Background technique [0002] Sound-absorbing board is an ideal sound-absorbing decorative material, with sound-absorbing, environmental protection, flame retardant, heat insulation, heat preservation, moisture-proof, mildew-proof, easy to remove dust, easy to cut, can be mosaiced, simple construction, good stability, impact resistance Good, independent and cost-effective, it can meet the needs of different styles and levels of sound-absorbing decoration. [0003] Some sound-absorbing panels on the market are made by installing rubber layers, vibration-absorbing materials or sound-insulating felts between two panels. Using this method, the sound insulation effect can be improved to a certain extent in the short term, but the sound insulation effect will decrease. Decrease gradually o...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/622C04B38/00
CPCC04B35/83C04B35/622C04B38/00C04B2235/48C04B2235/616C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9669C04B38/0067
Inventor 韩旭马开梅何平伟
Owner XINGHUA PRECISION CASTING & FORGING IND RES INST CO LTD