阅读说明：本技术 一种具有光催化功能的熔喷布及其制备方法和应用 (Melt-blown fabric with photocatalysis function and preparation method and application thereof ) 是由 郑善 郑星 于 2021-08-24 设计创作，主要内容包括：本发明涉及一种具有光催化功能的隔音熔喷布及其制备方法和应用。本发明的隔音熔喷布的制备方法为将聚丙烯熔融后进入熔喷设备中熔喷,利用牵引气流拉伸成纤维的过程中,同时将具有光催化杀菌效果的改性二氧化硅气凝胶粉体喷涂到喷出后的聚丙烯纤维表面,经冷却收集,即得所述具有光催化功能的隔音熔喷布。本发明的具有光催化功能的隔音熔喷布的吸音效果好,通过在聚酯表面喷涂二氧化硅气凝胶粉体,利用二氧化硅气凝胶粉体的多孔特性,进一步拓宽吸音的频率范围,对低音频也能有好的吸收效果,从而提高隔音性能；而且改性二氧化硅气凝胶粉体具有光催化效果,可以有效去除空气中的VOCs等污染物,有利于人体健康。(The invention relates to sound-insulation melt-blown cloth with a photocatalytic function and a preparation method and application thereof. The preparation method of the sound-insulation melt-blown fabric comprises the steps of melting polypropylene, carrying out melt-blowing in melt-blowing equipment, stretching the melt-blown fabric into fibers by using traction airflow, spraying modified silicon dioxide aerogel powder with a photocatalytic sterilization effect on the surfaces of the sprayed polypropylene fibers, cooling and collecting to obtain the sound-insulation melt-blown fabric with the photocatalytic function. The sound-insulation melt-blown fabric with the photocatalytic function has a good sound-absorbing effect, and the sound-absorbing frequency range is further widened by spraying the silicon dioxide aerogel powder on the surface of the polyester and utilizing the porous characteristic of the silicon dioxide aerogel powder, so that the sound-absorbing effect on low-frequency sound can be good, and the sound-insulating property is improved; and the modified silica aerogel powder has a photocatalytic effect, can effectively remove pollutants such as VOCs in the air and is beneficial to human health.)

1. A preparation method of sound insulation melt-blown fabric with a photocatalytic function is characterized by comprising the following steps:

and melting and spraying polypropylene into melting and spraying equipment, stretching the polypropylene into fibers by utilizing a traction airflow, spraying modified silicon dioxide aerogel powder with a photocatalytic sterilization effect on the surface of the sprayed polypropylene fibers, and cooling and collecting to obtain the sound-insulation melting and spraying cloth with the photocatalytic function.

2. The method of claim 1, wherein the melt-blown soundproof fabric having a photocatalytic function,

the modified silicon dioxide aerogel powder is silicon aerogel powder compounded by nano titanium oxide and rare earth solid solution; the average aperture range of the modified silicon dioxide aerogel powder is 12-25 nm.

3. The method of claim 1, wherein the melt-blown soundproof fabric having a photocatalytic function,

the average particle size range of the modified silicon dioxide aerogel powder is 4-8um, and the maximum particle size is not more than 15 um.

4. The method of claim 1, wherein the melt-blown soundproof fabric having a photocatalytic function,

the air flow speed of the traction air flow is 9000-11000m/min, the air flow temperature of the traction air flow is 220 ℃, and the air flow pressure of the traction air flow is 0.12-0.15 Mpa.

5. The method of claim 1, wherein the melt-blown soundproof fabric having a photocatalytic function,

the surface density of the sound-insulation melt-blown fabric with the photocatalytic function is 20g/m²～50g/m²。

6. The method of claim 1, wherein the melt-blown soundproof fabric having a photocatalytic function,

and extruding and melting by adopting a single-screw extruder, wherein the heating temperature is 210-240 ℃.

7. The method of claim 1, wherein the melt-blown soundproof fabric having a photocatalytic function,

the content of the silicon dioxide aerogel powder in the sound insulation melt-blown fabric with the photocatalysis function is 1 wt% -2 wt%.

8. The soundproof melt-blown fabric having a photocatalytic function, produced by the production method according to any one of claims 1 to 7.

9. Use of the sound-deadening meltblown fabric having photocatalytic function according to claim 8.

Technical Field

The invention relates to the field of melt-blown fabric materials, in particular to melt-blown fabric with a photocatalytic function, and a preparation method and application thereof.

Background

The new coronavirus causes a great demand of the society for masks, protective clothing and the like. However, none of these meltblown materials have a biocidal effect. Resulting in a large amount of waste at a time and troublesome disposal. Has become a big public nuisance in urban environment.

The silicon dioxide aerogel powder modified by the nano titanium dioxide and having the photocatalysis function is adhered to the surface of melt-blown yarns in the polyester melt-blown process, so that the melt-blown yarns have the function of killing viruses by photocatalysis. Furthermore, the manufactured mask, protective clothing, clothing materials and the like have the function, and the mask, the protective clothing, the clothing materials and the like have important significance for resisting infectious diseases, saving energy and reducing emission of human beings.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides sound-insulation melt-blown fabric with a photocatalytic function, and a preparation method and application thereof. The sound absorption effect of the sound insulation meltblown fabric with the photocatalytic function is good, the porous characteristic of the silicon dioxide aerogel powder is utilized by spraying the silicon dioxide aerogel powder on the surface of polyester, and the frequency range of sound absorption is further widened.

Preferably, the average pore diameter of the modified silica aerogel powder is in the range of 12-25 nm.

Preferably, the average particle size of the modified silica aerogel powder is in the range of 4-8um, and the maximum particle size is not more than 10 um.

Preferably, the gas flow speed of the traction gas flow is 9000-11000m/min, the gas flow temperature of the traction gas flow is 220 ℃, and the gas flow pressure of the traction gas flow is 0.12-0.15 MPa.

Preferably, the sound-insulating meltblown having a photocatalytic function has an areal density of 20g/m²～50g/m²。

Preferably, a single-screw extruder is adopted for extrusion and melting, and the heating temperature is 210-240 ℃.

Preferably, the content of the silica aerogel powder in the sound-insulation melt-blown fabric with the photocatalytic function is 1 wt% -2 wt%.

Preferably, the preparation method of the modified silica aerogel powder comprises the following steps:

(1) preparation of a mixed solution of a silicon source and a solvent

Putting sodium silicate with the modulus of 3.3 into a reaction kettle, adding deionized water with the mass 5 times that of the sodium silicate for dilution, stirring the reaction kettle at the speed of 300 revolutions per minute for 30 minutes, and filtering the mixture through a 200-mesh sieve to obtain a sodium silicate solution;

(2) sol gel

Adding water into oxalic acid, diluting to 22 mol/L, adding aluminum oxalate and yttrium oxalate into the oxalic acid, mixing uniformly, and adding the mixture into the sodium silicate solution obtained in the step (1) in a manner of injecting the mixture into liquid; the whole feeding time is controlled to be 25 minutes, the stirring speed is 300 revolutions per minute, and the pH value of the sodium silicate solution is controlled to be 2.5, so that sol is obtained; the molar ratio of the aluminum oxalate to the yttrium oxalate is 100: 4; the molar ratio of the oxide of aluminum oxalate to the silicon oxide in sodium silicate is 4: 100, respectively;

(3) gel

Taking sodium hydroxide or ammonia water, adding deionized water to dilute until the pH value is 11, and adding the sodium hydroxide or ammonia water into the reaction kettle in a spraying manner; rapidly stirring the materials in the reaction kettle at 1600 rpm while spraying, and stopping spraying when the pH value of the materials in the reaction kettle is 5.5 to obtain gel;

(4) aging of

Continuously stirring the mixture in the reaction kettle for 10 hours at the speed of 30 r/min, aging the materials in the reaction kettle, and controlling the temperature of the materials in the reaction kettle to be 18-22 ℃;

(5) solvent replacement

Continuously stirring for 90 minutes in the reaction kettle, and simultaneously adding a displacement solvent n-hexane with the same volume as the aged material in the reaction kettle in the step (4) to displace the residual water;

(6) surface modification

Continuously stirring in the reaction kettle, and simultaneously continuously adding the coupling agent phenyltriethoxysilane with the same volume as the aged material in the reaction kettle in the step (4); stirring for 80 minutes to obtain a silicon aerogel precursor coated with a replacement solvent n-hexane and a coupling agent phenyltriethoxysilane;

(7) drying

Putting the silicon aerogel precursor into a drying kettle, filling nitrogen into the drying kettle to remove oxygen until the oxygen content in the drying kettle is less than 3%, then performing microwave vacuum drying on the materials in the drying kettle for 70 minutes at a microwave frequency of 2450MHZ and a negative pressure of 0.1MPa in the drying kettle at a temperature of 100 ℃, and drying to obtain solid powdery silicon aerogel;

(8) modification of

Soaking the silicon dioxide aerogel powder in ammonia water with the concentration of 20wt% for 36h to prepare a soaking solution of the silicon dioxide aerogel powder; the volume ratio of the silicon dioxide aerogel powder to the ammonia water is 1: 2;

under the conditions of stirring and ultrasound, dropwise adding the impregnating solution of the silicon dioxide aerogel powder into a titanium sulfate solution with the concentration of 6wt%, and reacting for 20 minutes; wherein the stirring speed is controlled at 680 r/min, the frequency of ultrasonic vibration is 30KHz, and the power density is 0.4W/cm 2; the mass ratio of the impregnating solution of the silicon dioxide aerogel powder to the titanium sulfate solution is 1: 7; then adjusting the pH value of the system to 8.5, and continuing to react for 60 minutes; then, filtering and washing the obtained slurry to ensure that the pH value of the slurry is 7.8, and filtering until the solid content of the material is 45%; adding 300kg of deionized water, simultaneously adding 0.25kg of 50wt% lanthanum nitrate solution, stirring and heating to 78 ℃, spraying ammonia water to adjust the pH value to 7.5, adding 25mL of hydrogen peroxide, and stirring and reacting for 30 minutes; washing and filtering to obtain a slurry with the solid content of 42 percent; the slurry was then spray dried at 280 ℃ inlet and 110 ℃ outlet. Then the mixture enters a tubular oscillation furnace, the heating temperature in the furnace is set to 480 ℃, so that the titanium hydroxide/lanthanum coated on the surface of the aerogel is converted into nano-scale anatase titanium oxide/lanthanum, wherein the inlet temperature of spray drying is 280 ℃, and the outlet temperature is 110 ℃; the inclination angle of the tubular oscillation sintering furnace is 7 ℃, and the vibration frequency is 360 times/minute; finally obtaining modified silicon dioxide aerogel powder; namely nano titanium oxide/lanthanum solid solution compounded silicon aerogel particles.

Preferably, the reaction temperature of the materials in the steps (1) to (3) is 18 to 22 ℃.

The second purpose of the invention is to provide the sound-insulation melt-blown fabric with the photocatalytic function, which is prepared by the preparation method of the first purpose of the invention.

The third object of the present invention is to provide the application of the soundproof melt-blown fabric having the photocatalytic function of the second object of the present invention.

Has the advantages that:

the sound-insulation melt-blown fabric with the photocatalytic function has a better sound-absorbing effect, can reduce the weight of the sound-insulation melt-blown fabric with the photocatalytic function, and improves the flame-retardant effect and the sterilization effect of the sound-insulation melt-blown fabric with the photocatalytic function.

The modified silica aerogel powder prepared by the invention has good photocatalytic performance, and can adsorb and decompose VOCs, methylbenzene and other gaseous pollutants in air in a long-acting and strong-acting manner;

according to the invention, a certain amount of rare earth oxide is added into the prepared modified silicon dioxide aerogel powder, so that the anatase crystal conversion of the nano-titanium oxide can be greatly realized at a lower temperature, and the catalytic activity of the nano-titanium oxide is promoted to be enhanced; the raw materials used in the invention are easy to purchase and low in price, and the process method is relatively simple, easy to realize industrialization and low in production cost.

Detailed Description

While the present invention will be described in detail with reference to the following examples, it should be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the present invention.

Example 1

The preparation method of the modified silicon dioxide aerogel powder comprises the following steps:

(1) preparation of a mixed solution of a silicon source and a solvent

Putting sodium silicate with the modulus of 3.3 into a reaction kettle, adding deionized water with the mass 5 times that of the sodium silicate for dilution, stirring the reaction kettle at the speed of 300 revolutions per minute for 30 minutes, and filtering the mixture through a 200-mesh sieve to obtain a sodium silicate solution;

(2) sol gel

Adding water into oxalic acid, diluting to 22 mol/L, adding aluminum oxalate and yttrium oxalate into the oxalic acid, mixing uniformly, and adding the mixture into the sodium silicate solution obtained in the step (1) in a manner of injecting the mixture into liquid; the whole feeding time is controlled to be 25 minutes, the stirring speed is 300 revolutions per minute, and the pH value of the sodium silicate solution is controlled to be 2.5, so that sol is obtained; the molar ratio of the aluminum oxalate to the yttrium oxalate is 100: 4; the molar ratio of the oxide of aluminum oxalate to the silicon oxide in sodium silicate is 4: 100, respectively;

(3) gel

Taking sodium hydroxide or ammonia water, adding deionized water to dilute until the pH value is 11, and adding the sodium hydroxide or ammonia water into the reaction kettle in a spraying manner; rapidly stirring the materials in the reaction kettle at 1600 rpm while spraying, and stopping spraying when the pH value of the materials in the reaction kettle is 5.5 to obtain gel;

(4) aging of

Continuously stirring the mixture in the reaction kettle for 10 hours at the speed of 30 r/min, aging the materials in the reaction kettle, and controlling the temperature of the materials in the reaction kettle to be 18 ℃;

(5) solvent replacement

Continuously stirring for 90 minutes in the reaction kettle, and simultaneously adding a displacement solvent n-hexane with the same volume as the aged material in the reaction kettle in the step (4) to displace the residual water;

(6) surface modification

Continuously stirring in the reaction kettle, and simultaneously continuously adding the coupling agent phenyltriethoxysilane with the same volume as the aged material in the reaction kettle in the step (4); stirring for 80 minutes to obtain a silicon aerogel precursor coated with a replacement solvent n-hexane and a coupling agent phenyltriethoxysilane;

(7) drying

Putting the silicon aerogel precursor into a drying kettle, filling nitrogen into the drying kettle to remove oxygen until the oxygen content in the drying kettle is less than 3%, then performing microwave vacuum drying on the materials in the drying kettle for 70 minutes at a microwave frequency of 2450MHZ and a negative pressure of 0.1MPa in the drying kettle at a temperature of 100 ℃, and drying to obtain solid powdery silicon aerogel;

(8) modification of

Soaking the silicon dioxide aerogel powder in ammonia water with the concentration of 20wt% for 36h to prepare a soaking solution of the silicon dioxide aerogel powder; the volume ratio of the silicon dioxide aerogel powder to the ammonia water is 1: 2;

under the conditions of stirring and ultrasound, dropwise adding the impregnating solution of the silicon dioxide aerogel powder into a titanium sulfate solution with the concentration of 6wt%, and reacting for 20 minutes; wherein the stirring speed is controlled at 680 r/min, the frequency of ultrasonic vibration is 30KHz, and the power density is 0.4W/cm 2; the mass ratio of the impregnating solution of the silicon dioxide aerogel powder to the titanium sulfate solution is 1: 7; then adjusting the pH value of the system to 8.5, and continuing to react for 60 minutes; then, filtering and washing the obtained slurry to ensure that the pH value of the slurry is 7.8, and filtering until the solid content of the material is 45%; adding 300kg of deionized water, simultaneously adding 0.25kg of 50wt% lanthanum nitrate solution, stirring and heating to 78 ℃, spraying ammonia water to adjust the pH value to 7.5, adding 25mL of hydrogen peroxide, and stirring and reacting for 30 minutes; washing and filtering to obtain a slurry with the solid content of 42 percent; the slurry was then spray dried at 280 ℃ inlet and 110 ℃ outlet. Then the mixture enters a tubular oscillation furnace, the heating temperature in the furnace is set to 480 ℃, so that the titanium hydroxide/lanthanum coated on the surface of the aerogel is converted into nano-scale anatase titanium oxide/lanthanum, wherein the inlet temperature of spray drying is 280 ℃, and the outlet temperature is 110 ℃; the inclination angle of the tubular oscillation sintering furnace is 7 ℃, and the vibration frequency is 360 times/minute; finally obtaining modified silicon dioxide aerogel powder; namely nano titanium oxide/lanthanum solid solution compounded silicon aerogel particles.

The reaction temperature of the materials in the steps (1) to (3) in the above preparation method is 18 ℃.

The average pore diameter of the modified silicon dioxide aerogel powder prepared by the preparation method is 18nm, and then the modified silicon dioxide aerogel powder is ground, so that the average particle diameter of the modified silicon dioxide aerogel powder is 6um, and the maximum particle diameter is not more than 10 um.

Example 2

The preparation method is basically the same as that of the example 1, except that the reaction temperature of the materials in the steps (1) to (3) in the example 2 is 22 ℃, and the temperature of the materials in the reaction kettle is controlled to be 22 ℃ when the step (4) is aged.

The average pore diameter of the modified silicon dioxide aerogel powder prepared by the preparation method is 25nm, and then the modified silicon dioxide aerogel powder is ground, so that the average particle diameter of the modified silicon dioxide aerogel powder is 8um, and the maximum particle diameter is not more than 10 um.

Example 3

The preparation method is basically the same as that of the example 1, except that the reaction temperature of the materials in the steps (1) to (3) in the example 2 is 20 ℃, and the temperature of the materials in the reaction kettle is controlled to be 20 ℃ when the step (4) is aged.

The average pore diameter of the modified silicon dioxide aerogel powder prepared by the preparation method is 20nm, and then the modified silicon dioxide aerogel powder is ground, so that the average particle diameter of the modified silicon dioxide aerogel powder is 5um, and the maximum particle diameter is not more than 10 um.

The modified silica aerogel powder prepared in examples 1 to 3 has an escherichia coli killing capability of not less than 95% in 24 hours and a staphylococcus aureus killing capability of not less than 90% in 24 hours under lighting.

Example 4

A preparation method of sound-insulation melt-blown cloth with a photocatalytic function comprises the steps of melting polypropylene, then feeding the melted polypropylene into melt-blowing equipment for melt-blowing, and extruding and melting the polypropylene by adopting a single-screw extruder, wherein the heating temperature is 210 ℃; simultaneously spraying modified silicon dioxide aerogel powder with a photocatalytic sterilization effect (silicon dioxide aerogel powder prepared in embodiment 1) on the surface of the sprayed polypropylene fiber, wherein the silicon dioxide aerogel powder is put into a storage hopper arranged on a high-speed hot air flow pipeline of a screw extruder, polyester is melted, extruded and drawn and stretched in the screw extruder according to a conventional process, meanwhile, the silicon dioxide aerogel powder also enters the high-speed hot air flow by utilizing the negative pressure effect generated by the high-speed hot air flow and is uniformly adhered to the surface of the hot-viscous hot-adhesive fiber at a nozzle of a die head, the air flow velocity of a drawing air flow is 10000m/min, the air flow temperature of the drawing air flow is 220 ℃, and the air flow pressure of the drawing air flow is 0.12 Mpa; and then cooling, forming and collecting (the collecting speed can be adjusted according to the surface density requirement), thus obtaining the sound-insulation melt-blown fabric with the photocatalysis function.

The surface density of the sound-proof melt-blown fabric with the photocatalysis function in the sound-proof melt-blown fabric with the photocatalysis function prepared by the preparation method is 20g/m²(ii) a The sound-insulating melt-blown fabric with the photocatalytic function contains 1 wt% of silica aerogel powder.

Example 5

A preparation method of sound-insulation melt-blown cloth with a photocatalytic function comprises the steps of melting polypropylene, then feeding the melted polypropylene into melt-blowing equipment for melt-blowing, and extruding and melting the polypropylene by adopting a single-screw extruder, wherein the heating temperature is 220 ℃; simultaneously spraying modified silicon dioxide aerogel powder with a photocatalytic sterilization effect (silicon dioxide aerogel powder prepared in embodiment 1) on the surface of the sprayed polypropylene fiber, wherein the silicon dioxide aerogel powder is put into a storage hopper arranged on a high-speed hot air flow pipeline of a screw extruder, polyester is melted, extruded and drawn and stretched in the screw extruder according to a conventional process, meanwhile, the silicon dioxide aerogel powder also enters the high-speed hot air flow by utilizing the negative pressure effect generated by the high-speed hot air flow and is uniformly adhered to the surface of the hot-viscous hot-adhesive fiber at a nozzle of a die head, the air flow velocity of a drawing air flow is 11000m/min, the air flow temperature of the drawing air flow is 220 ℃, and the air flow pressure of the drawing air flow is 0.15 MPa; and then cooling, forming and collecting (the collecting speed can be adjusted according to the surface density requirement), thus obtaining the sound-insulation melt-blown fabric with the photocatalysis function.

The sound-proof melt-blown fabric with the photocatalytic function in the sound-proof melt-blown fabric with the photocatalytic function prepared by the preparation method has the surface density of 50g/m²(ii) a The sound-insulating melt-blown fabric with the photocatalytic function contains 2 wt% of silica aerogel powder.

Example 6

A preparation method of sound-proof melt-blown cloth with a photocatalytic function comprises melting polypropylene, melt-blowing in melt-blowing equipment, and extruding and melting by a single-screw extruder at 235 ℃; simultaneously spraying modified silicon dioxide aerogel powder with a photocatalytic sterilization effect (silicon dioxide aerogel powder prepared in embodiment 1) on the surface of the sprayed polypropylene fiber, wherein the silicon dioxide aerogel powder is put into a storage hopper arranged on a high-speed hot air flow pipeline of a screw extruder, polyester is melted, extruded and drawn and stretched in the screw extruder according to a conventional process, meanwhile, the silicon dioxide aerogel powder also enters the high-speed hot air flow by utilizing the negative pressure effect generated by the high-speed hot air flow and is uniformly adhered to the surface of the hot-viscous hot-adhesive fiber at a nozzle of a die head, the air flow velocity of a drawing air flow is 10000m/min, the air flow temperature of the drawing air flow is 220 ℃, and the air flow pressure of the drawing air flow is 0.14 Mpa; and then cooling, forming and collecting (the collecting speed can be adjusted according to the surface density requirement), thus obtaining the sound-insulation melt-blown fabric with the photocatalysis function.

The surface density of the sound-proof melt-blown fabric with the photocatalysis function in the sound-proof melt-blown fabric with the photocatalysis function prepared by the preparation method is 40g/m²(ii) a The sound-insulating melt-blown fabric with the photocatalytic function contains 1.5 wt% of silica aerogel powder.

Example 7

A preparation method of sound-insulation melt-blown cloth with a photocatalytic function comprises the steps of melting polypropylene, then feeding the melted polypropylene into melt-blowing equipment for melt-blowing, and extruding and melting the polypropylene by adopting a single-screw extruder, wherein the heating temperature is 210 ℃; simultaneously spraying modified silicon dioxide aerogel powder with a photocatalytic sterilization effect (silicon dioxide aerogel powder prepared in embodiment 1) on the surface of the sprayed polypropylene fiber, wherein the silicon dioxide aerogel powder is put into a storage hopper arranged on a high-speed hot air flow pipeline of a screw extruder, polyester is melted, extruded and drawn and stretched in the screw extruder according to a conventional process, meanwhile, the silicon dioxide aerogel powder also enters the high-speed hot air flow by utilizing the negative pressure effect generated by the high-speed hot air flow and is uniformly adhered to the surface of the hot-viscous hot-adhesive fiber at a die head nozzle, the flow velocity of melt-blown air flow of a traction air flow is 10500m/min, the air flow temperature of the traction air flow is 220 ℃, and the air flow pressure of the traction air flow is 0.13 Mpa; and then cooling, forming and collecting (the collecting speed can be adjusted according to the surface density requirement), thus obtaining the sound-insulation melt-blown fabric with the photocatalysis function.

The surface density of the sound-proof melt-blown fabric with the photocatalysis function in the sound-proof melt-blown fabric with the photocatalysis function prepared by the preparation method is 35g/m²(ii) a The sound-insulating melt-blown fabric with the photocatalytic function contains 1.3 wt% of silica aerogel powder.

Comparative example 1

In example 6, the raw materials and the preparation process of the sound-insulating meltblown fabric having a photocatalytic function were the same, except that the average pore diameter of the modified silica aerogel powder was 60 nm. The surface density of the sound-proof melt-blown fabric with the photocatalysis function in the sound-proof melt-blown fabric with the photocatalysis function prepared by the preparation method is 43g/m²

Comparative example 2

The preparation process of the soundproof meltblown having the photocatalytic function in example 6 was the same, except that the raw material of the soundproof meltblown having the photocatalytic function did not contain silica aerogel powder, and the areal density of the soundproof meltblown having the photocatalytic function in the soundproof meltblown having the photocatalytic function prepared by the above preparation method was 65g/m²。

Comparative example 3

Example 6 raw materials and production Process for soundproof meltblown having photocatalytic functionThe same, except that the modified silica aerogel powder had an average particle size of 25 um. The surface density of the sound-proof melt-blown fabric with the photocatalysis function in the sound-proof melt-blown fabric with the photocatalysis function prepared by the preparation method is 55g/m²

The soundproof meltblown having photocatalytic function according to examples 4 to 7 of the present invention and comparative examples 1 to 3 were subjected to flame retardant effect and sound absorption effect tests. The sound absorption effect is measured by GB/T18696.2-2002, and the impact resistance times refer to the impact strength of 5KJ/m²The impact force of the impact energy is used for impacting the sound-insulation cloth, and the impact energy is stopped when the sound-insulation melt-blown cloth with the photocatalysis function seriously loses powder.

The test results are shown in table 1 below,

TABLE 1 Performance data for acoustic meltblown fabrics with photocatalytic function

It can be seen from the comparison of the above data that the sound-insulating meltblown having a photocatalytic function according to the present invention has a significantly improved attraction effect at low audio frequencies.

The sound insulation melt-blown fabric with the photocatalytic function can be firmly attached to polyester fibers only under the proper pore diameter and particle size of the silicon dioxide aerogel powder.

Compared with polyester fiber, the sound-insulation melt-blown fabric with the photocatalytic function has the advantage that the flame retardant effect is obviously improved.

Compared with polyester fiber, the sound-insulation melt-blown fabric with the photocatalytic function has the advantage that the weight reduction effect is obviously improved.

Compared with polyester fiber, the sound-insulation melt-blown fabric with the photocatalytic function has the advantage that the antibacterial effect is obviously improved.

The soundproof melt-blown fabric with the photocatalytic function of the present invention can be used in automobile interior trims, subway trims, and the like.