阅读说明：本技术 一种混合气凝胶改性的密胺泡绵及其应用 (Mixed aerogel modified melamine foam and application thereof ) 是由 樊雪子 李洋洋 于 2021-02-03 设计创作，主要内容包括：本发明提供了一种混合气凝胶改性的密胺泡绵及其应用,是由下述制备方法制成：制备澄清的淀粉透明溶胶；取三聚氰胺和甲醛,加入淀粉透明溶胶,制备混合湿凝胶,老化,溶剂置换、干燥后得混合气凝胶,将制得的混合气凝胶球磨处理；取三聚甲醛和甲醛混合,进行预聚反应,得预聚物,将粉碎后的混合气凝胶加入预聚物中,加入乳化剂、二苯基甲烷二异氰酸酯、丙二醇、发泡剂、的阻燃剂,混合均匀；微波发泡,固化定型后得混合气凝胶改性的密胺泡绵。本发明的制作备的密胺泡绵发泡率高,轻质保温,进一步地提高了隔热性和吸音性。(The invention provides a mixed aerogel modified melamine foam and application thereof, and the mixed aerogel modified melamine foam is prepared by the following preparation method: preparing clear transparent starch sol; taking melamine and formaldehyde, adding transparent starch sol, preparing mixed wet gel, aging, replacing a solvent, and drying to obtain mixed aerogel, and performing ball milling treatment on the prepared mixed aerogel; mixing trioxymethylene and formaldehyde, carrying out prepolymerization reaction to obtain a prepolymer, adding the crushed mixed aerogel into the prepolymer, adding an emulsifier, diphenylmethane diisocyanate, propylene glycol, a foaming agent and a flame retardant, and uniformly mixing; and (4) performing microwave foaming, curing and shaping to obtain the mixed aerogel modified melamine foam. The prepared melamine foam has high foaming rate, is light and heat-insulating, and further improves the heat insulation property and the sound absorption property.)

1. The mixed aerogel modified melamine foam is characterized by being prepared by the following preparation method:

(1) weighing 2-5g of soluble starch and 0.1-0.2g of sodium citrate, adding into 20ml of deionized water, and continuously stirring at a rotating speed of 600rad/min below 60 ℃ until clear transparent sol is formed;

(2) weighing 5-8g of melamine, adding the melamine into 100ml of deionized water, adding 0.1g of sodium carbonate, stirring for 10min at 70-75 ℃, adding 10ml of formaldehyde, stirring for 20min at 70-75 ℃, adding the transparent sol and the propylene glycol obtained in the step (1), stirring for 10min at 85-90 ℃, adding hydrochloric acid to adjust the pH value to 1.5, standing for 10-20h at 70-80 ℃, treating the gel by using a supercritical drying technology after the gel is completely gelled and performing solvent replacement by using acetone, and drying for 3-6h at 35-45 ℃ and 8-12MPa to obtain mixed aerogel;

(3) ball milling the prepared mixed aerogel for 30-50min, and sieving with a 100-mesh sieve; mixing 65-80g of trioxymethylene and 70-80ml of formaldehyde, carrying out prepolymerization reaction to obtain a prepolymer, adding the crushed mixed aerogel into the prepolymer, adding 6-8g of emulsifier, 12-16g of diphenylmethane diisocyanate, 2-5g of propylene glycol, 3-7g of foaming agent and 2-6g of flame retardant, and uniformly mixing; and (4) performing microwave foaming, curing and shaping to obtain the mixed aerogel modified melamine foam.

2. The hybrid aerogel modified melamine foam according to claim 1, wherein: the emulsifier is sodium dodecyl benzene sulfonate, sodium dodecyl sulfate or sodium benzene sulfonate.

3. The hybrid aerogel modified melamine foam according to claim 1, wherein: the foaming agent is n-pentane, n-butane, n-hexane or dichlorofluoromethane.

4. The hybrid aerogel modified melamine foam according to claim 1, wherein: the flame retardant is cyanuric acid or ammonium polyphosphate.

5. Use of a hybrid aerogel modified melamine foam of any of claims 1-5 in an aircraft.

6. Use of a hybrid aerogel modified melamine foam according to claim 5 in an aircraft, characterized in that: the airplane comprises a shock absorption and noise reduction plate, wherein the shock absorption and noise reduction plate comprises a rigid plate, a shock absorption layer, a main plate, a protective layer and a noise reduction layer arranged on the main plate, and the shock absorption layer is positioned between the rigid plate and the noise reduction layer;

the damping layer comprises a damping plate, a plurality of soft sleeves and a conduction spring, the damping plate is arranged on one surface, close to the main board, of the rigid plate, the contact area of the damping plate and the rigid plate is the same, the damping plate is made of aerogel modified melamine foam, the soft sleeves are installed in the inner cavity of the damping plate, the number of the soft sleeves is multiple, the soft sleeves are uniformly distributed in the cavity of the damping plate, and the soft sleeves are made of melamine foam; the conducting springs are installed in the soft sleeves, and two ends of the conducting springs are connected with the hard plate and the noise reduction layer respectively.

7. The hybrid aerogel modified melamine foam of claim 1, wherein the noise reduction layer comprises a first noise reduction plate and a second noise reduction plate, the first noise reduction plate being disposed on the main plate and the first noise reduction plate being adjacent to the shock absorption plate; the second noise reduction plate is installed on the main plate, and the second noise reduction plate is far away from the first noise reduction plate.

8. The hybrid aerogel modified melamine foam of claim 7, wherein the protective layer comprises a first protective plate and a second protective plate, the first protective plate is mounted on the second noise reduction plate, and the first protective plate is remote from the main plate; the second protection plate is installed on the first protection plate, and the second protection plate is far away from the second noise reduction plate.

9. The aerogel modified melamine foam of claim 7, wherein the shock absorbing plate has the same contact area with the first noise reducing plate.

10. The hybrid aerogel modified melamine foam of claim 8, wherein the thickness of the first protective plate is 8mm, and the thickness of the first protective plate is equal to the thickness of the first noise reduction plate.

Technical Field

The invention belongs to the technical field of aerogel materials, and particularly relates to a mixed aerogel modified melamine foam and application thereof.

Background

Melamine foamed plastic with three-dimensional grid structure system with sufficient open poresThe ratio of length to diameter (L/D) of the grid is between 10 and 20, so that sound waves can conveniently and effectively enter the deep layer of the foam body and are converted into vibration energy of the grid to be consumed and absorbed, reflected waves are effectively eliminated, the foam is not easily decomposed in a transient environment of 150-180 ℃, and the density of the foam is only 8-12 kg/m³And the heat conductivity coefficient is 0.037W/m.K, so that the product has good thermal stability and ageing resistance. The melamine foam is a flame-retardant substance, the surface of the melamine foam is quickly carbonized after the melamine foam meets open fire, the product can reach the B1-grade low-flammability material standard (German standard) and the UL 94-V0-grade high-flame-retardant material standard (American insurance Association standard) specified by DIN 4102 without adding any flame retardant, and the melamine foam is a novel high-tech fireproof material recommended by the Ministry of public Security of China at present.

Aerogel is a special kind of nanoporous material with many excellent physicochemical properties, such as: low density, high porosity, high specific surface area, adjustable surface chemistry, etc. Because the aerogel has unique performance in the aspects of physics, chemistry, machinery and the like, the aerogel is widely applied in the fields of heat preservation and insulation, catalysis, environmental purification, chemical sensors, acoustic sensors, energy storage equipment, waterproof coatings, inertial confinement fusion, high-energy physics, particle capture, biomedicine, food processing and the like.

If the aerogel is used in a melamine resin high-molecular foaming material, the foaming process of the melamine resin has a good promoting effect, and the heat insulation property and the sound absorption property of the melamine foam can be further improved.

Disclosure of Invention

The invention provides a mixed aerogel modified melamine foam and application thereof, which can further improve the heat insulation property and the sound absorption property of the melamine foam.

The technical scheme of the invention is realized as follows:

a mixed aerogel modified melamine foam is prepared by the following preparation method:

(1) weighing 2-5g of soluble starch and 0.1-0.2g of sodium citrate, adding into 20ml of deionized water, and continuously stirring at a rotating speed of 600rad/min below 60 ℃ until clear transparent sol is formed;

(2) weighing 5-8g of melamine, adding the melamine into 100ml of deionized water, adding 0.1g of sodium carbonate, stirring for 10min at 70-75 ℃, adding 10ml of formaldehyde, stirring for 20min at 70-75 ℃, adding the transparent sol and the propylene glycol obtained in the step (1), stirring for 10min at 85-90 ℃, adding hydrochloric acid to adjust the pH value to 1.5, standing for 10-20h at 70-80 ℃, treating the gel by using a supercritical drying technology after the gel is completely gelled and performing solvent replacement by using acetone, and drying for 3-6h at 35-45 ℃ and 8-12MPa to obtain mixed aerogel;

(3) ball milling the prepared mixed aerogel for 30-50min, and sieving with a 100-mesh sieve; mixing 65-80g of trioxymethylene and 70-80ml of formaldehyde, carrying out prepolymerization reaction to obtain a prepolymer, adding the crushed mixed aerogel into the prepolymer, adding 6-8g of emulsifier, 12-16g of diphenylmethane diisocyanate, 2-5g of propylene glycol, 3-7g of foaming agent and 2-6g of flame retardant, and uniformly mixing; and (4) performing microwave foaming, curing and shaping to obtain the mixed aerogel modified melamine foam.

Wherein, preferably, the emulsifier is sodium dodecyl benzene sulfonate, sodium dodecyl sulfate or sodium benzene sulfonate.

Among them, preferably, the blowing agent is n-pentane, n-butane, n-hexane, or dichlorofluoromethane.

Wherein, preferably, the flame retardant is cyanuric acid or ammonium polyphosphate.

The application of the mixed aerogel modified melamine foam in the thermal insulation and noise reduction of the airplane.

The airplane comprises a shock absorption and noise reduction plate, wherein the shock absorption and noise reduction plate comprises a rigid plate, a shock absorption layer, a main plate, a protective layer and a noise reduction layer arranged on the main plate, and the shock absorption layer is positioned between the rigid plate and the noise reduction layer;

the shock absorption layer comprises a shock absorption plate, a plurality of soft sleeves and a conduction spring, the shock absorption plate is arranged on one surface, close to the main board, of the rigid plate, the contact area of the shock absorption plate and the contact area of the rigid plate are the same, the shock absorption plate is made of mixed aerogel modified melamine foam, the soft sleeves are installed in the inner cavity of the shock absorption plate, the number of the soft sleeves is multiple, the soft sleeves are uniformly distributed in the cavity of the shock absorption plate, and the soft sleeves are made of melamine foam; the conducting springs are installed in the soft sleeves, and two ends of the conducting springs are connected with the hard plate and the noise reduction layer respectively.

The noise reduction layer comprises a first noise reduction plate and a second noise reduction plate, the first noise reduction plate is arranged on the main plate, and the first noise reduction plate is close to the damping plate; the second noise reduction plate is installed on the main plate, and the second noise reduction plate is far away from the first noise reduction plate.

The protective layer comprises a first protective plate and a second protective plate, the first protective plate is mounted on the second noise reduction plate, and the first protective plate is far away from the main plate; the second protection plate is installed on the first protection plate, and the second protection plate is far away from the second noise reduction plate.

Wherein, preferably, the contact area of the damping plate and the first noise reduction plate is the same.

Preferably, the thickness of the first protection plate is 8mm, and the thickness of the first protection plate is equal to that of the first noise reduction plate.

The invention has the beneficial effects that:

according to the invention, the starch is introduced into the melamine/formaldehyde aerogel, so that the gelling time is shortened, the density of melamine/formaldehyde is reduced, and the mechanical properties of the melamine/formaldehyde aerogel are effectively improved.

In addition, sodium citrate is added into the starch sol to play a role in strengthening the gel, and propylene glycol is added in the step of aging the gel, so that the growth of gel particles can be inhibited, the uniform size of gel network gaps is facilitated, the strength of a gel framework is increased, and the shrinkage and cracking of the gel caused by nonuniform stress in the subsequent drying process are avoided.

The melamine/formaldehyde/starch wet gel has a unique nano porous structure, can be adsorbed in a resin melt in the foaming process of melamine formaldehyde resin, and improves the strength of the resin melt. The prepared melamine foam has high foaming rate, is light and heat-insulating, and is used in a damping and noise-reducing plate of an airplane to further improve the heat insulation property and the sound absorption property.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a vibration and noise reduction panel for an aircraft according to the present invention;

FIG. 2 is a schematic side view of a vibration and noise reduction panel for an aircraft according to the present invention;

FIG. 3 is an enlarged view of the invention at A;

FIG. 4 is a top view of the hard plate of the present invention.

The reference numbers in the figures illustrate: 1. a hard plate; 2. a damper plate; 3. a flexible sleeve; 4. a conductive spring; 5. a first noise reduction plate; 6. a main board; 7. a second noise reduction plate; 8. a first guard plate; 9. and a second protection plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The embodiment provides a mixed aerogel modified melamine foam, which is prepared by the following preparation method:

(1) weighing 4g of soluble starch and 0.15g of sodium citrate, adding into 20ml of deionized water, and continuously stirring at a rotating speed of 600rad/min below 60 ℃ until clear transparent sol is formed;

(2) weighing 6.5g of melamine, adding the melamine into 100ml of deionized water, adding 0.1g of sodium carbonate, stirring for 10min at 72 ℃, adding 10ml of formaldehyde, stirring for 20min at 70 ℃, adding the transparent sol and the propylene glycol obtained in the step (1), stirring for 10min at 85-90 ℃, adding hydrochloric acid to adjust the pH value to 1.5, standing for 15h at 75 ℃, after the gel is completely formed, performing solvent replacement by using acetone, treating the gel by using a supercritical drying technology, and drying for 4.5h at 35-45 ℃ and 10MPa to obtain mixed aerogel; performance testing of aerogels: specific surface area 393.5m²G, porosity 93.2%, density 7.8mg/cm³The thermal conductivity coefficient is 23.14mw/mk, and the compressive strength is about 0.27MPa (25% deformation).

(3) Ball milling the prepared mixed aerogel for 40min, and sieving by a 100-mesh sieve; mixing 70g of trioxymethylene and 75ml of formaldehyde, carrying out prepolymerization reaction to obtain a prepolymer, adding the crushed mixed aerogel into the prepolymer, adding 7g of sodium dodecyl benzene sulfonate, 14g of diphenylmethane diisocyanate, 3.5g of propylene glycol, 5g of n-pentane and 4g of ammonium polyphosphate, and uniformly mixing; and (4) performing microwave foaming, curing and shaping to obtain the mixed aerogel modified melamine foam.

The melamine foam of the present example was subjected to a performance test, and the result showed that the foam had an open cell content of 99.5% and a density of 6.0kg/m³The tensile strength is 0.084 +/-0.004 MPa.

Example 2

The embodiment provides a mixed aerogel modified melamine foam, which is prepared by the following preparation method:

(1) weighing 2g of soluble starch and 0.2g of sodium citrate, adding into 20ml of deionized water, and continuously stirring at a rotating speed of 600rad/min below 60 ℃ until clear transparent sol is formed;

(2) weighing 5-g of melamine, adding the melamine into 100ml of deionized water, adding 0.1g of sodium carbonate, stirring for 10min at 70-75 ℃, adding 10ml of formaldehyde, stirring for 20min at 75 ℃, adding the transparent sol and the propylene glycol obtained in the step (1), stirring for 10min at 85 ℃, adding hydrochloric acid to adjust the pH value to 1.5, standing for 10h at 80 ℃, after complete gelation, carrying out solvent replacement by using acetone, treating the gel by using a supercritical drying technology, and drying for 6h at 45 ℃ and 8MPa to obtain mixed aerogel;

performance testing of aerogels: specific surface area 392.7m²G, porosity 93.4%, density 7.9mg/cm³The thermal conductivity coefficient is 22.45mw/mk, and the compressive strength is about 0.26MPa (25% deformation).

(3) Ball milling the prepared mixed aerogel for 30min, and sieving by a 100-mesh sieve; mixing 80g of trioxymethylene and 70ml of formaldehyde, carrying out prepolymerization reaction to obtain a prepolymer, adding the crushed mixed aerogel into the prepolymer, adding 8g of sodium dodecyl benzene sulfonate, 12g of diphenylmethane diisocyanate, 5g of propylene glycol, 3g of n-butane and 6g of ammonium polyphosphate, and uniformly mixing; and (4) performing microwave foaming, curing and shaping to obtain the mixed aerogel modified melamine foam.

The melamine foam of the present example was subjected to a performance test, and the result showed that the foam had an open cell content of 99.5% and a density of 6.12kg/m³The tensile strength is 0.085 +/-0.004 MPa.

Example 3

The embodiment provides a mixed aerogel modified melamine foam, which is prepared by the following preparation method:

(1) weighing 5g of soluble starch and 0.1g of sodium citrate, adding into 20ml of deionized water, and continuously stirring at a rotating speed of 600rad/min below 60 ℃ until clear transparent sol is formed;

(2) weighing 8g of melamine, adding the melamine into 100ml of deionized water, adding 0.1g of sodium carbonate, stirring for 10min at 70 ℃, adding 10ml of formaldehyde, stirring for 20min at 75 ℃, adding the transparent sol and the propylene glycol obtained in the step (1), stirring for 10min at 85 ℃, adding hydrochloric acid to adjust the pH value to 1.5, standing for 10h at 80 ℃, after the gel is completely formed, carrying out solvent replacement by using acetone, treating the gel by using a supercritical drying technology, and drying for 6h at 45 ℃ and 8MPa to obtain mixed aerogel; performance testing of aerogels: specific surface area 392.7m²(ii) a porosity of 93.4%The density is 7.9mg/cm³The thermal conductivity coefficient is 22.45mw/mk, and the compressive strength is about 0.26MPa (25% deformation);

(3) ball milling the prepared mixed aerogel for 50min, and sieving by a 100-mesh sieve; mixing 65g of trioxymethylene and 80ml of formaldehyde, carrying out prepolymerization reaction to obtain a prepolymer, adding the crushed mixed aerogel into the prepolymer, adding 8g of sodium dodecyl sulfate, 12g of diphenylmethane diisocyanate, 5g of propylene glycol, 3g of n-hexane and 6g of cyanuric acid, and uniformly mixing; and (4) performing microwave foaming, curing and shaping to obtain the mixed aerogel modified melamine foam.

The melamine foam of the present example was subjected to a performance test, and the result showed that the foam had an open cell content of 99.3% and a density of 6.0kg/m³The tensile strength was 0.082. + -. 0.005 MPa.

Example 4

The embodiment provides a mixed aerogel modified melamine foam, which is prepared by the following preparation method:

(1) weighing 3g of soluble starch and 0.18g of sodium citrate, adding into 20ml of deionized water, and continuously stirring at a rotating speed of 600rad/min below 60 ℃ until clear transparent sol is formed;

(2) weighing 6g of melamine, adding the melamine into 100ml of deionized water, adding 0.1g of sodium carbonate, stirring for 10min at 75 ℃, adding 10ml of formaldehyde, stirring for 20min at 75 ℃, adding the transparent sol and the propylene glycol obtained in the step (1), stirring for 10min at 88 ℃, adding hydrochloric acid to adjust the pH value to 1.5, standing for 18h at 75 ℃, after the gel is completely formed, carrying out solvent replacement by using acetone, treating the gel by using a supercritical drying technology, and drying for 5h at 40 ℃ and 10MPa to obtain mixed aerogel; performance testing of aerogels: specific surface area 390.6m²Per g, porosity 92.8%, density 7.6mg/cm³The thermal conductivity coefficient is 23.15mw/mk, and the compressive strength is about 0.25MPa (25% deformation);

(3) ball milling the prepared mixed aerogel for 45min, and sieving the mixed aerogel by a 100-mesh sieve; taking 75g of trioxymethylene and 75ml of formaldehyde to mix, carrying out prepolymerization reaction to obtain a prepolymer, adding the crushed mixed aerogel into the prepolymer, adding 7g of sodium dodecyl sulfate, 13g of diphenylmethane diisocyanate, 4.5g of propylene glycol, 6g of dichloromeflothane and 3.5g of cyanuric acid, and uniformly mixing; and (4) performing microwave foaming, curing and shaping to obtain the mixed aerogel modified melamine foam.

The melamine foam of the present example was subjected to a performance test, and the result showed that the foam had an open cell content of 99.6% and a density of 6.2kg/m³The tensile strength is 0.085 +/-0.005 MPa.

Example 5

The embodiment provides a mixed aerogel modified melamine foam, which is prepared by the following preparation method:

(1) weighing 4.5g of soluble starch and 0.15g of sodium citrate, adding into 20ml of deionized water, and continuously stirring at a rotating speed of 600rad/min below 60 ℃ until clear transparent sol is formed;

(2) weighing 7g of melamine, adding the melamine into 100ml of deionized water, adding 0.1g of sodium carbonate, stirring for 10min at 72 ℃, adding 10ml of formaldehyde, stirring for 20min at 70 ℃, adding the transparent sol and the propylene glycol obtained in the step (1), stirring for 10min at 88 ℃, adding hydrochloric acid to adjust the pH value to 1.5, standing for 12h at 75 ℃, after the gel is completely formed, carrying out solvent replacement by using acetone, treating the gel by using a supercritical drying technology, and drying for 4h at 40 ℃ and 10MPa to obtain mixed aerogel; performance testing of aerogels: specific surface area 390.6m²Per g, porosity 92.8%, density 7.8mg/cm³The thermal conductivity coefficient is 22.34mw/mk, and the compressive strength is about 0.25MPa (25% deformation);

(3) ball milling the prepared mixed aerogel for 40min, and sieving by a 100-mesh sieve; mixing 72g of trioxymethylene and 78ml of formaldehyde, carrying out prepolymerization reaction to obtain a prepolymer, adding the crushed mixed aerogel into the prepolymer, adding 6.5g of sodium benzenesulfonate, 13.5g of diphenylmethane diisocyanate, 4.5g of propylene glycol, 5.5g of dichloromeflothane and 4g of cyanuric acid, and uniformly mixing; and (4) performing microwave foaming, curing and shaping to obtain the mixed aerogel modified melamine foam.

The melamine foam of the embodiment was subjected to a performance test, and the result showed that the foam had an open cell content of 99.2% and a density of 6.2kg/m³The tensile strength is 0.087 +/-0.002 MPa.

Example 6

The embodiment provides melamine foam which is prepared by the following preparation method:

70g of trioxymethylene and 75ml of formaldehyde are mixed, a prepolymerization reaction is carried out to obtain a prepolymer, 7g of sodium dodecyl benzene sulfonate, 14g of diphenylmethane diisocyanate, 3.5g of propylene glycol, 5g of n-pentane and 4g of ammonium polyphosphate are added, and the mixture is uniformly mixed; and (4) performing microwave foaming, curing and shaping to obtain the mixed aerogel modified melamine foam.

The melamine foam of the embodiment was subjected to a performance test, and the result showed that the foam had an open cell content of 88.0% and a density of 8.2kg/m³The tensile strength is 0.068 +/-0.003 MPa. It can be seen from the performance data that the addition of melamine foam to the mixed aerogel significantly increases the open cell content, reduces the density, and further improves the mechanical properties.

Application examples

As shown in fig. 1 to 4, the embodiment provides the application of the hybrid aerogel modified melamine foam in the thermal insulation and noise reduction of the airplane. The airplane comprises a shock absorption and noise reduction plate, wherein the shock absorption and noise reduction plate comprises a rigid plate 1, a shock absorption layer, a main plate 6, a protective layer and a noise reduction layer arranged on the main plate 6, and the shock absorption layer is positioned between the rigid plate 1 and the noise reduction layer; the damping layer comprises a damping plate 2, a soft sleeve 3 and a conduction spring 4, the damping plate 2 is arranged on one surface of the rigid plate 1 close to the main board 6, the contact area of the damping plate 2 and the rigid plate 1 is the same, the damping plate 2 is made of aerogel, and the damping layer has the effect of damping and simultaneously enables the damping plate 2 to have a certain heat preservation effect; the inner cavity of the damping plate 2 is provided with a plurality of soft sleeves 3, the soft sleeves 3 are uniformly distributed in the inner cavity of the damping plate 2, and the soft sleeves 3 are made of mixed aerogel modified melamine foam, so that a better heat insulation effect is achieved; the plurality of soft sleeves 3 are internally provided with a plurality of conductive springs 4, and two ends of the plurality of conductive springs 4 are respectively connected with the hard plate 1 and the noise reduction layer.

The noise reduction layer comprises a first noise reduction plate 5 and a second noise reduction plate 7, the first noise reduction plate 5 is arranged on the main plate 6, and the first noise reduction plate 5 is close to the damping plate 2; the second noise reduction plate 7 is installed on the main plate 6, and the second noise reduction plate 7 is far away from the first noise reduction plate 5, so that sound generated outside the airplane can be better absorbed.

The protective layer comprises a first protective plate 8 and a second protective plate 9, the first protective plate 8 is mounted on the second noise reduction plate 7, and the first protective plate 8 is far away from the main plate 6; the second protection plate 9 is mounted on the first protection plate 8, and the second protection plate 9 is far away from the second noise reduction plate 7, which has the function of better protecting the aircraft panel.

The contact area of the damping plate 2 and the first noise reduction plate 5 is the same, so that the plate for the airplane can be better used to have a certain damping effect.

Wherein, the thickness of first guard plate 8 is 8mm, and the thickness of first guard plate 8 equals with the thickness of first board 5 of making an uproar that falls, and its effect makes the crew member when with the board contact of aircraft, can not appear great colliding with.

When the airplane damping device works, firstly, the rigid plate 1 resists the collision of some external objects, through the arrangement of the damping layer, when the rigid plate 1 generates certain force due to the collision, the damping plate 2 absorbs part of the force, then most of the remaining force is removed under the action of the soft sleeve 3 and the conduction spring 4, so that the force is uniformly dispersed, the airplane plate is ensured to have better damping effect, and meanwhile, external sound is fully absorbed under the action of the first noise reduction plate 5 and the second noise reduction plate 7, so that people inside the airplane cannot be influenced by external noise, and through the action of the first protection plate 8 and the second protection plate 9, the people inside the airplane can be better protected.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.