CN108912664B - Preparation method of modified glass wool reinforced sound absorption material - Google Patents
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/143—Halogen containing compounds
- C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
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- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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- C08J2419/00—Characterised by the use of rubbers not provided for in groups C08J2407/00 - C08J2417/00
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
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- C08K7/14—Glass
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Abstract
The invention provides a preparation method of a modified glass wool reinforced sound absorption material, which comprises the following steps: s1, preparing rare earth modified glass cotton fibers; s2, preparing activated modified rubber powder; s3, weighing the following components in parts by mass: polyether polyol, isocyanate, a foam stabilizer AK-8805, triethylene diamine, monofluoro-dichloroethane, activated modified rubber powder, sodium dodecyl sulfate, modified glass wool fiber and modified alumina; and S4, uniformly mixing polyether polyol, a foam stabilizer AK-8805, triethylene diamine, monofluorodichloroethane, activated modified rubber powder, sodium dodecyl sulfate, modified glass wool fiber and modified alumina according to a formula proportion, adding isocyanate, stirring at room temperature, and curing at room temperature. The glass wool is prepared by a modification method, so that the effect of enhancing sound absorption is achieved.
Description
Technical Field
The invention relates to the field of sound absorption materials, in particular to a preparation method of a modified glass wool reinforced sound absorption material.
Background
With the rapid development of modern industry, building industry and transportation industry, various mechanical equipment and transportation tools are rapidly increased, the noise pollution is increasingly serious, and the noise pollution influences and destroys the normal work and life of people and harms the human health. The noise pollution is one of four environmental pollutions in the world because the noise pollution has wide sources and has great influence on the body and spirit of people, and the noise pollution is more serious in large and medium-sized cities with dense entrances and developed economy, thereby becoming a hot point problem which is concerned by the environmental management process. In noise pollution abatement, the use of sound absorbing materials is an indispensable measure for noise pollution abatement.
Disclosure of Invention
The technical problem to be solved is as follows: the invention aims to provide a preparation method of a modified glass wool reinforced sound absorption material, which is used for preparing glass wool by a modification method to achieve the effect of sound absorption enhancement.
The technical scheme is as follows: a preparation method of a modified glass wool reinforced sound absorption material comprises the following steps:
s1, heating the glass cotton fiber at the temperature of 300-350 ℃ for 6S, cooling, soaking in 0.5-1.2mol/L hydrochloric acid for 30-60min, washing the acid with water, drying, soaking the dried glass cotton fiber in a rare earth nitrate aqueous solution, performing ultrasonic dispersion, taking out, and airing to obtain the modified glass cotton fiber;
s2, drying and dehydrating the waste rubber powder, and then activating the dehydrated waste rubber powder for 1-5min by microwave radiation under the power of 500-1000W to obtain activated modified rubber powder;
s3, weighing the following components by mass: 80-100 parts of polyether polyol, 5-8 parts of isocyanate, 12-18 parts of foam stabilizer AK-8805, 6-20 parts of triethylene diamine, 9-15 parts of monofluoro-dichloroethane, 8-24 parts of activated modified rubber powder, 3-6 parts of sodium dodecyl sulfate, 8-20 parts of modified glass cotton fiber and 5-15 parts of modified alumina;
s4, mixing polyether polyol, foam stabilizer AK-8805, triethylene diamine, monofluoro dichloroethane, activated modified rubber powder, sodium dodecyl sulfate, modified glass wool fiber and modified alumina uniformly according to the formula proportion, adding isocyanate, stirring for 5-10S at room temperature, controlling the rotating speed at 500-1500r/min, and curing at normal temperature.
Further, the rare earth nitrate is one of neodymium nitrate, lanthanum nitrate, yttrium nitrate and cerium nitrate, and the concentration of the rare earth nitrate aqueous solution is controlled to be 1%.
Further, the modified alumina described in step S3 is a high-alumina obtained by foaming at 800 ℃ and has a bulk density of 0.85g cm-3The Mohs hardness was 6.
Further, in step S3, the following components are weighed according to mass: 85-95 parts of polyether polyol, 6-8 parts of isocyanate, 14-16 parts of a foam stabilizer AK-8805, 10-16 parts of triethylene diamine, 12-15 parts of monofluoro-dichloroethane, 15-20 parts of activated modified rubber powder, 4-5 parts of sodium dodecyl sulfate, 12-16 parts of modified glass cotton fiber and 7-12 parts of modified alumina.
Further, the rotation speed in step S4 is controlled to 800-.
Has the advantages that: the invention has the following advantages: according to the invention, the modified glass cotton fiber is prepared by modification, the rare earth oxide can form surface coating on the glass cotton fiber, the rare earth oxide coated on the surface is like fluff, so that the performance and the capability are enhanced, the sound absorption effect after the glass fiber is filled is greatly improved, the compatibility between rubber powder and polyurethane is improved by adding the modified rubber powder and the modified alumina, the modified alumina has loose porosity and rough surface, and the modified alumina has good compatibility with a matrix by adding SDS.
Detailed Description
In the following examples, the modified alumina was a high-alumina produced by foaming at 800 ℃ and had a bulk density of 0.85g cm-3The Mohs hardness was 6.
Example 1
A preparation method of a modified glass wool reinforced sound absorption material comprises the following steps:
s1, heating the glass cotton fiber at 300 ℃ for 6S, cooling, soaking in 0.5mol/L hydrochloric acid for 60min, washing with water, drying, soaking the dried glass cotton fiber in 1wt% of rare earth neodymium nitrate aqueous solution, performing ultrasonic dispersion, taking out, and drying to obtain the modified glass cotton fiber;
s2, drying and dehydrating the waste rubber powder, and then performing microwave radiation activation on the dehydrated waste rubber powder for 5min under the power of 500W to obtain activated modified rubber powder;
s3, weighing the following components by mass: 80 parts of polyether polyol, 5 parts of isocyanate, 12 parts of a foam stabilizer AK-8805, 20 parts of triethylene diamine, 9 parts of monofluoro dichloroethane, 24 parts of activated modified rubber powder, 3 parts of sodium dodecyl sulfate, 8 parts of modified glass cotton fiber and 15 parts of modified alumina;
and S4, uniformly mixing polyether polyol, a foam stabilizer AK-8805, triethylene diamine, monofluorodichloroethane, activated modified rubber powder, sodium dodecyl sulfate, modified glass cotton fiber and modified alumina according to the formula proportion, adding isocyanate, stirring for 5S at room temperature, controlling the rotating speed to be 1500r/min, and curing at room temperature.
Example 2
A preparation method of a modified glass wool reinforced sound absorption material comprises the following steps:
s1, heating the glass cotton fiber at 350 ℃ for 6S, cooling, soaking in 1.2mol/L hydrochloric acid for 30min, washing with water, drying, soaking the dried glass cotton fiber in 1wt% of rare earth lanthanum nitrate aqueous solution, performing ultrasonic dispersion, taking out, and drying to obtain modified glass cotton fiber;
s2, drying and dehydrating the waste rubber powder, and then activating the dehydrated waste rubber powder for 1min by microwave radiation under the power of 1000W to obtain activated modified rubber powder;
s3, weighing the following components by mass: 100 parts of polyether polyol, 8 parts of isocyanate, 18 parts of a foam stabilizer AK-8805, 6 parts of triethylene diamine, 15 parts of monofluoro dichloroethane, 8 parts of activated modified rubber powder, 6 parts of sodium dodecyl sulfate, 20 parts of modified glass cotton fiber and 5 parts of modified alumina;
and S4, uniformly mixing polyether polyol, a foam stabilizer AK-8805, triethylene diamine, monofluorodichloroethane, activated modified rubber powder, sodium dodecyl sulfate, modified glass cotton fiber and modified alumina according to the formula proportion, adding isocyanate, stirring for 10S at room temperature, controlling the rotating speed to be 500r/min, and curing at room temperature.
Example 3
A preparation method of a modified glass wool reinforced sound absorption material comprises the following steps:
s1, heating the glass cotton fiber at 300 ℃ for 6S, cooling, soaking in 0.6mol/L hydrochloric acid for 30min, washing with water, drying, soaking the dried glass cotton fiber in 1wt% of rare earth yttrium nitrate aqueous solution, performing ultrasonic dispersion, taking out, and drying to obtain the modified glass cotton fiber;
s2, drying and dehydrating the waste rubber powder, and then activating the dehydrated waste rubber powder for 2min by microwave radiation under the power of 600W to obtain activated modified rubber powder;
s3, weighing the following components by mass: 85 parts of polyether polyol, 6 parts of isocyanate, 14 parts of a foam stabilizer AK-8805, 10 parts of triethylene diamine, 15 parts of monofluoro-dichloroethane, 15 parts of activated modified rubber powder, 5 parts of sodium dodecyl sulfate, 12 parts of modified glass cotton fiber and 12 parts of modified alumina;
and S4, uniformly mixing polyether polyol, a foam stabilizer AK-8805, triethylene diamine, monofluorodichloroethane, activated modified rubber powder, sodium dodecyl sulfate, modified glass cotton fiber and modified alumina according to the formula proportion, adding isocyanate, stirring at room temperature for 6S, controlling the rotating speed to be 1200r/min, and curing at room temperature.
Example 4
A preparation method of a modified glass wool reinforced sound absorption material comprises the following steps:
s1, heating the glass cotton fiber at 350 ℃ for 6S, cooling, soaking in 1mol/L hydrochloric acid for 60min, washing with water, drying, soaking the dried glass cotton fiber in 0.9wt% of rare earth cerous nitrate aqueous solution, performing ultrasonic dispersion, taking out, and drying to obtain modified glass cotton fiber;
s2, drying and dehydrating the waste rubber powder, and then performing microwave radiation activation on the dehydrated waste rubber powder for 4min under the power of 800W to obtain activated modified rubber powder;
s3, weighing the following components by mass: 95 parts of polyether polyol, 8 parts of isocyanate, 16 parts of foam stabilizer AK-8805, 16 parts of triethylene diamine, 12 parts of monofluoro-dichloroethane, 20 parts of activated modified rubber powder, 4 parts of sodium dodecyl sulfate, 16 parts of modified glass cotton fiber and 7 parts of modified alumina;
and S4, mixing polyether polyol, a foam stabilizer AK-8805, triethylene diamine, monofluorodichloroethane, activated modified rubber powder, sodium dodecyl sulfate, modified glass wool fiber and modified alumina uniformly according to the formula proportion, adding isocyanate, stirring for 8S at room temperature, controlling the rotating speed to be 800r/min, and curing at room temperature.
Example 5
A preparation method of a modified glass wool reinforced sound absorption material comprises the following steps:
s1, heating the glass cotton fiber at 320 ℃ for 6S, cooling, soaking in 0.8mol/L hydrochloric acid for 50min, washing with water, drying, soaking the dried glass cotton fiber in 1wt% of rare earth lanthanum nitrate aqueous solution, performing ultrasonic dispersion, taking out, and drying to obtain modified glass cotton fiber;
s2, drying and dehydrating the waste rubber powder, and then activating the dehydrated waste rubber powder for 3min by microwave radiation under the power of 700W to obtain activated modified rubber powder;
s3, weighing the following components by mass: 90 parts of polyether polyol, 7 parts of isocyanate, 15 parts of foam stabilizer AK-8805, 14 parts of triethylene diamine, 14 parts of monofluoro-dichloroethane, 18 parts of activated modified rubber powder, 5 parts of sodium dodecyl sulfate, 15 parts of modified glass cotton fiber and 10 parts of modified alumina. (ii) a
And S4, mixing polyether polyol, a foam stabilizer AK-8805, triethylene diamine, monofluorodichloroethane, activated modified rubber powder, sodium dodecyl sulfate, modified glass wool fiber and modified alumina uniformly according to the formula proportion, adding isocyanate, stirring for 8S at room temperature, controlling the rotating speed to be 1000r/min, and curing at room temperature.
Comparative example 1
A preparation method of a modified glass wool reinforced sound absorption material comprises the following steps:
s1, drying and dehydrating the waste rubber powder, and then performing microwave radiation activation on the dehydrated waste rubber powder for 5min under the power of 500W to obtain activated modified rubber powder;
s2, weighing the following components by mass: 80 parts of polyether polyol, 5 parts of isocyanate, 12 parts of a foam stabilizer AK-8805, 20 parts of triethylene diamine, 9 parts of monofluoro dichloroethane, 24 parts of activated modified rubber powder, 3 parts of sodium dodecyl sulfate, 8 parts of glass cotton fiber and 15 parts of modified alumina;
and S3, mixing polyether polyol, a foam stabilizer AK-8805, triethylene diamine, monofluorodichloroethane, activated modified rubber powder, sodium dodecyl sulfate, glass wool fiber and modified alumina uniformly according to the formula proportion, adding isocyanate, stirring for 5S at room temperature, controlling the rotating speed to be 1500r/min, and curing at room temperature.
Comparative example 2
A preparation method of a modified glass wool reinforced sound absorption material comprises the following steps:
s1, heating the glass cotton fiber at 350 ℃ for 6S, cooling, soaking in 1.2mol/L hydrochloric acid for 30min, washing with water, drying, soaking the dried glass cotton fiber in 1wt% of rare earth lanthanum nitrate aqueous solution, performing ultrasonic dispersion, taking out, and drying to obtain modified glass cotton fiber;
s2, drying and dehydrating the waste rubber powder, and then activating the dehydrated waste rubber powder for 1min by microwave radiation under the power of 1000W to obtain activated modified rubber powder;
s3, weighing the following components by mass: 100 parts of polyether polyol, 8 parts of isocyanate, 18 parts of a foam stabilizer AK-8805, 6 parts of triethylene diamine, 15 parts of monofluoro dichloroethane, 6 parts of sodium dodecyl sulfate and 20 parts of modified glass cotton fiber;
and S4, mixing polyether polyol, a foam stabilizer AK-8805, triethylene diamine, monofluoro dichloroethane, sodium dodecyl sulfate and modified glass wool fiber uniformly according to the formula proportion, adding isocyanate, stirring for 10S at room temperature, controlling the rotating speed to be 500r/min, and curing at normal temperature.
Testing the sound absorption performance of the composite sound absorption material by adopting a transfer function impedance tube sound absorption testing system;
| 300-3000Hz average sound absorption coefficient | Average sound absorption coefficient of 3000-6500Hz | |
| Example 1 | 0.659 | 0.712 |
| Example 2 | 0.634 | 0.723 |
| Example 3 | 0.701 | 0.734 |
| Example 4 | 0.699 | 0.729 |
| Example 5 | 0.712 | 0.735 |
| Comparative example 1 | 0.595 | 0.556 |
| Comparative example 2 | 0.578 | 0.546 |
Claims (4)
1. A preparation method of a modified glass wool reinforced sound absorption material is characterized by comprising the following steps:
s1, heating the glass cotton fiber at the temperature of 300-350 ℃ for 6S, cooling, soaking in 0.5-1.2mol/L hydrochloric acid for 30-60min, washing the acid with water, drying, soaking the dried glass cotton fiber in a rare earth nitrate aqueous solution, performing ultrasonic dispersion, taking out, and airing to obtain the modified glass cotton fiber;
s2, drying and dehydrating the waste rubber powder, and then activating the dehydrated waste rubber powder for 1-5min by microwave radiation under the power of 500-1000W to obtain activated modified rubber powder;
s3, weighing the following components by mass: 80-100 parts of polyether polyol, 5-8 parts of isocyanate, 12-18 parts of foam stabilizer AK-8805, 6-20 parts of triethylene diamine, 9-15 parts of monofluoro dichloroethane, 8-24 parts of activated modified rubber powder, 3-6 parts of sodium dodecyl sulfate, 8-20 parts of modified glass cotton fiber and 5-15 parts of modified alumina, wherein the modified alumina is prepared by foaming high-alumina at 800 ℃, and the bulk density of the modified alumina is 0.85g cm-3Mohs hardness of 6;
s4, mixing polyether polyol, foam stabilizer AK-8805, triethylene diamine, monofluoro dichloroethane, activated modified rubber powder, sodium dodecyl sulfate, modified glass wool fiber and modified alumina uniformly according to the formula proportion, adding isocyanate, stirring for 5-10S at room temperature, controlling the rotating speed at 500-1500r/min, and curing at normal temperature.
2. The method for preparing the modified glass wool reinforced sound absorption material as claimed in claim 1, wherein the method comprises the following steps: the rare earth nitrate is one of neodymium nitrate, lanthanum nitrate, yttrium nitrate and cerium nitrate, and the concentration of the rare earth nitrate aqueous solution is controlled to be 1%.
3. The method for preparing the modified glass wool reinforced sound absorption material as claimed in claim 1, wherein the method comprises the following steps: in step S3, the following components are weighed according to the mass: 85-95 parts of polyether polyol, 6-8 parts of isocyanate, 14-16 parts of a foam stabilizer AK-8805, 10-16 parts of triethylene diamine, 12-15 parts of monofluoro-dichloroethane, 15-20 parts of activated modified rubber powder, 4-5 parts of sodium dodecyl sulfate, 12-16 parts of modified glass cotton fiber and 7-12 parts of modified alumina.
4. The method for preparing the modified glass wool reinforced sound absorption material as claimed in claim 1, wherein the method comprises the following steps: in step S4, the rotation speed is controlled to 800-.
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