CN116731421A - Noise-reduction composite cotton material for aircraft passenger cabin and preparation method and application thereof - Google Patents
Noise-reduction composite cotton material for aircraft passenger cabin and preparation method and application thereof Download PDFInfo
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- CN116731421A CN116731421A CN202310807762.1A CN202310807762A CN116731421A CN 116731421 A CN116731421 A CN 116731421A CN 202310807762 A CN202310807762 A CN 202310807762A CN 116731421 A CN116731421 A CN 116731421A
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- 239000000463 material Substances 0.000 title claims abstract description 181
- 229920000742 Cotton Polymers 0.000 title claims abstract description 63
- 239000002131 composite material Substances 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 57
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims abstract description 34
- JVTAAEKCZFNVCJ-REOHCLBHSA-N L-lactic acid Chemical compound C[C@H](O)C(O)=O JVTAAEKCZFNVCJ-REOHCLBHSA-N 0.000 claims abstract description 34
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 30
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims abstract description 18
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims abstract description 18
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims abstract description 18
- 235000003956 Luffa Nutrition 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 17
- 239000004814 polyurethane Substances 0.000 claims abstract description 16
- 229920002635 polyurethane Polymers 0.000 claims abstract description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 15
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 15
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 15
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 15
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 15
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 14
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 14
- AWARHXCROCWEAK-UHFFFAOYSA-N tert-butyl n-prop-2-enylcarbamate Chemical compound CC(C)(C)OC(=O)NCC=C AWARHXCROCWEAK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 119
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 238000002156 mixing Methods 0.000 claims description 38
- 230000009467 reduction Effects 0.000 claims description 32
- 238000001816 cooling Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 14
- 230000035484 reaction time Effects 0.000 claims description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims description 14
- 239000010935 stainless steel Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 238000005469 granulation Methods 0.000 claims description 12
- 230000003179 granulation Effects 0.000 claims description 12
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 12
- 244000050983 Luffa operculata Species 0.000 claims 1
- 241000219138 Luffa Species 0.000 abstract description 16
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 7
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000006116 polymerization reaction Methods 0.000 abstract description 3
- 239000012761 high-performance material Substances 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 description 18
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 15
- 239000003063 flame retardant Substances 0.000 description 15
- 238000009413 insulation Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
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- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Abstract
The application discloses a noise-reducing composite cotton material for an aircraft cabin, and a preparation method and application thereof, and belongs to the technical field of high-performance materials. The main material comprises the following raw material components: l-lactic acid, polyurethane, magnesium carbonate, alumina, luffa fiber, tert-butyl N-allylcarbamate, polyvinyl alcohol and ethylene-vinyl acetate copolymer; the auxiliary materials comprise the following raw material components: maleic anhydride, divinylbenzene, ethanol, polyvinylpyrrolidone. The application designs two components of main materials and auxiliary materials, wherein the main materials comprise raw materials such as L-lactic acid, polyurethane, luffa fiber, polyvinyl alcohol and the like, the auxiliary materials comprise raw materials such as maleic anhydride, polyvinylpyrrolidone and the like, and the noise-reducing composite cotton material for the aircraft cabin is obtained after polymerization, covalent coupling and the like and treatment.
Description
Technical Field
The application belongs to the technical field of high-performance materials, and particularly relates to a noise-reducing composite cotton material for an aircraft cabin, and a preparation method and application thereof.
Background
As the use of commercial aircraft mainly carries passengers, the comfort of the environment in the cabin of the commercial aircraft is an important index reflecting the advantages and disadvantages of the commercial aircraft, along with the continuous progress of technology, the diversification of human comfort indexes and the gradual popularization of civil passenger plane vehicles, and the noise level in the cabin is more and more important in the design indexes of the comfort of the civil passenger plane. Because the civil airliner has external sound sources such as external air power, an engine, an APU (auxiliary power unit), a landing gear, a hydraulic pump and the like, and also has a plurality of internal sound sources such as an air conditioning system, an avionic system, an entertainment system and the like, the design of a plurality of systems such as an engine hanger, a fuselage structure, a heat and sound insulation layer, cabin interior decoration, cabin layout and the like also affects the noise level in the cabin of the civil airliner. The main foreign civil airliner manufacturers pay more and more attention to the noise design in the cabin, invest a great deal of funds and manpower to study the noise control and integration technology in the cabin, reduce the noise design index in the cabin of the novel aircraft, simultaneously, carry out noise reduction design optimization on the existing aircraft, and improve the market competitiveness of the respective civil airliner models. The air bus company first performs the official bris-brix representation. Air bus companies have been working on reducing aircraft noise from the source since the date of creation, providing the quietest aircraft to the market. In the past, the air passenger car reduces the aircraft noise while continuously improving the aircraft voyage and passenger capacity through technical innovation. The noise sources in the cabin of the commercial aircraft mainly comprise an engine, pneumatic boundary layer noise, environmental control system air conditioning component noise, pressure regulating system jet noise and pneumatic noise in an air conditioning pipe. At present, the noise reduction technology of cabin interior noise adopted in the commercial aircraft design mainly has the advantages of optimizing aerodynamic appearance, reducing the contribution of the noise of the external boundary layer of the aircraft to the noise in the cabin, paving a heat insulation and sound insulation layer between the aircraft skin and cabin interior trim, absorbing the contribution of an engine and the external aerodynamic turbulence boundary layer to the noise in the cabin, optimizing the turbine and the compressor blades of the air conditioning component of the environmental control system, and additionally installing a muffler on an air conditioning pipeline, thereby reducing the contribution of the environmental control system to the noise in the cabin. Because the aircraft has a plurality of state stages such as ground waiting for flight, take-off, landing, climbing, cruising and the like, the sound source characteristics of the main cabin noise source of the aircraft can change in different state stages, for example, the landing gear needs to be put down in the aircraft landing stage, the landing gear is retracted and put down, the pneumatic noise outside the aircraft is directly changed, and the noise level in the cabin and after the landing gear is put down can be obviously increased. In addition, under various conditions such as opening of an airplane flap and opening of a back thrust system, noise in a cabin of an airplane can be obviously increased, but due to the fact that the noise spectrum characteristics of noise sources in abnormal states are special, the noise in the cabin can be rapidly increased in a short time, and the noise is very little influenced by a traditional passive noise reduction mode of laying a heat insulation and sound insulation layer, so that a crew and passengers have to accept the fact that the noise in the cabin is increased.
At present, noise reduction measures adopted by commercial aircraft in the cabin comprise adding a structural heat insulation and sound insulation layer, adding an environmental control pipeline muffler, improving the aerodynamic appearance of the aircraft and the like. For example, application number: CN202310389757.3, a vibration-damping noise-reducing coating and its preparation method, the coating of the vibration-damping noise-reducing coating is made of the following raw materials by mass percent: 25-35% of epoxy resin E, 15-25% of 2-ethyl methacrylate, 9-15% of magnetic EVA particles, 15-20% of filler, 0.5-3% of dispersing agent, 3-6% of emulsifying agent, 0.5-2% of tackifier, 1-2% of defoaming agent and the balance of solvent water. However, it is difficult to apply the coating to the aircraft cabin, firstly the flammability of the epoxy resin, and secondly the effective suppression of noise is difficult to achieve with a thin coating, and furthermore, the coating is easy to fall off due to the noise of the aircraft cabin accompanied by large vibrations.
Disclosure of Invention
Aiming at the defects of the prior art, the application aims to provide the noise reduction composite cotton material for the aircraft passenger cabin and the preparation method and the application thereof.
In order to achieve the above purpose, the present application provides the following technical solutions:
a noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is (8-12): (2-5);
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the noise-reducing composite cotton material for the aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is (8-12): (2-5); the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the noise-reducing composite cotton material for the aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 10:3, a step of; the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 70-90 deg.c and 5-10 MPa for 6-10 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled to be 180-200 ℃, the reaction time is controlled to be 12 hours, and the reaction pressure is controlled to be 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 55-80 deg.c for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 110-120 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
wherein the parameters of the mixing are as follows:
stirring at 80deg.C under 7MPa for 7 hr.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 190 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
wherein the parameters of the water bath are as follows: heating in water bath at 64deg.C for 20 hr.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
wherein the parameter conditions for the second reaction are as follows: the reaction was carried out at 115℃for 0.5h.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
The noise reduction composite cotton material for the aircraft cabin is applied to noise reduction.
Compared with the prior art, the application has the beneficial effects that:
in summary, the application designs two components of the main material and the auxiliary material, wherein the main material comprises raw materials such as L-lactic acid, polyurethane, luffa fiber, polyvinyl alcohol and the like, the auxiliary material comprises raw materials such as maleic anhydride, polyvinylpyrrolidone and the like, and the main material and the auxiliary material are subjected to polymerization, covalent coupling and other reactions and treatment to obtain the noise reduction composite cotton material for the aircraft cabin. In addition, the flame retardant composition is presumed to reach the flame retardant standard without too much additive amount in the high molecular polymer, and the flame retardant composition has good dispersibility in the high molecular polymer, is not easy to generate agglomeration, reduces dust emission and is environment-friendly; the possible reasons for the guess are: the surface structure of the alumina is in a block shape or a column shape, the angle is large, the alumina is not easy to enter the inside of a matrix of a high polymer, the magnesium carbonate, the L-lactic acid and the luffa fiber can generate a flame-retardant composition with a sharp corner structure after interaction, and the sharp corner structure weakens the resistance of the alumina entering the inside of the high polymer due to the action of the surface maleic anhydride, is easy to be inserted into the matrix of the high polymer, is easy to transfer and disperse in the inside of the polymer, and improves the dispersibility of the flame-retardant composition in the polymer. Meanwhile, the polyvinylpyrrolidone promotes carbonization of the polymer surface to cover the polymer surface after being heated, and the flame retardant effect is further improved by isolating air.
Detailed Description
The following describes the technical solutions in the embodiments of the present application in detail, and the described embodiments are only some of the embodiments of the present application. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application. The application is further described below in connection with specific embodiments.
Example 1
Noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 8:5, a step of;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 70deg.C under 10MPa for 6 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 180 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 55deg.C for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 120 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
The noise reduction composite cotton material for the aircraft cabin is applied to noise reduction.
Example 2
Noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 12:2;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 90deg.C under 5MPa for 10 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 200 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 80deg.C for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 110 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
The noise reduction composite cotton material for the aircraft cabin is applied to noise reduction.
Example 3
Noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 8:2;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 70deg.C under 5MPa for 6 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 180 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 55deg.C for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 110 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
The noise reduction composite cotton material for the aircraft cabin is applied to noise reduction.
Example 4
Noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 12:5, a step of;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 90deg.C under 10MPa for 10 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 200 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 80deg.C for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 120 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
The noise reduction composite cotton material for the aircraft cabin is applied to noise reduction.
Example 5
Noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 10:3, a step of;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 80deg.C under 7MPa for 7 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 190 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 64deg.C for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 115 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
The noise reduction composite cotton material for the aircraft cabin is applied to noise reduction.
Comparative example 1
Noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 10:3, a step of;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 80deg.C under 7MPa for 7 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 190 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 64deg.C for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 115 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
Comparative example 2
Noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 10:3, a step of;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 80deg.C under 7MPa for 7 hr;
after the mixing operation is finished, dropwise adding the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester to carry out a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 190 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 64deg.C for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 115 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
Comparative example 3
Noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 10:3, a step of;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
the preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 80deg.C under 7MPa for 7 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 190 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa; cooling to room temperature after the first reaction;
then adding the ethylene-vinyl acetate copolymer, the ethanol and transferring to a constant temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 64deg.C for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 115 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
Comparative example 4
Noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 10:3, a step of;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
14 parts of divinylbenzene, and the balance of divinylbenzene,
15 parts of ethanol, and the mixture is prepared from the following components,
6 parts of polyvinylpyrrolidone.
The preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 80deg.C under 7MPa for 7 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 190 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 64deg.C for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 115 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
Comparative example 5
Noise-reducing composite cotton material for an aircraft cabin,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 10:3, a step of;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
34 parts of maleic anhydride, and the mixture is prepared,
14 parts of divinylbenzene, and the balance of divinylbenzene,
15 parts of ethanol.
The preparation method of the noise-reducing composite cotton material for the aircraft passenger cabin,
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 80deg.C under 7MPa for 7 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 190 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 64deg.C for 20 hr; cooling to room temperature, and granulating with a double screw extruder.
The preparation method of the noise-reducing composite cotton material for the aircraft cabin,
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
Application scheme
The materials prepared in examples 1 to 5 and the materials prepared in comparative examples 1 to 5 were selected and tested for noise reduction performance and flame retardant performance, respectively.
(1) Noise reduction performance
The material with the thickness of 20mm is manufactured, then is dried, 2 frequencies are measured and compared within the range of 0-5000Hz of octaves, and the noise reduction coefficient is calculated by taking the arithmetic average value under the sound absorption coefficient of 1000 and 2000 Hz.
Table 1 noise reduction performance
(2) Flame retardant Properties
The materials were tested for oxygen index (LOI) according to GB/T2406-2009.
TABLE 2 flame retardant Properties
In summary, the application designs two components of the main material and the auxiliary material, wherein the main material comprises raw materials such as L-lactic acid, polyurethane, luffa fiber, polyvinyl alcohol and the like, the auxiliary material comprises raw materials such as maleic anhydride, polyvinylpyrrolidone and the like, and the main material and the auxiliary material are subjected to polymerization, covalent coupling and other reactions and treatment to obtain the noise reduction composite cotton material for the aircraft cabin. In addition, the flame retardant composition is presumed to reach the flame retardant standard without too much additive amount in the high molecular polymer, and the flame retardant composition has good dispersibility in the high molecular polymer, is not easy to generate agglomeration, reduces dust emission and is environment-friendly; the possible reasons for the guess are: the surface structure of the alumina is in a block shape or a column shape, the angle is large, the alumina is not easy to enter the inside of a matrix of a high polymer, the magnesium carbonate, the L-lactic acid and the luffa fiber can generate a flame-retardant composition with a sharp corner structure after interaction, and the sharp corner structure weakens the resistance of the alumina entering the inside of the high polymer due to the action of the surface maleic anhydride, is easy to be inserted into the matrix of the high polymer, is easy to transfer and disperse in the inside of the polymer, and improves the dispersibility of the flame-retardant composition in the polymer. Meanwhile, the polyvinylpyrrolidone promotes carbonization of the polymer surface to cover the polymer surface after being heated, and the flame retardant effect is further improved by isolating air.
The application and its embodiments have been described above by way of illustration and not limitation, and the actual construction is not limited to this. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present application.
Claims (10)
1. A noise-reducing composite cotton material for an aircraft cabin is characterized in that,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is (8-12): (2-5); the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
2. the noise reduction composite cotton material for an aircraft passenger cabin according to claim 1,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is (8-12): (2-5); the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
3. the noise reduction composite cotton material for an aircraft passenger cabin according to claim 1,
the raw materials comprise main materials and auxiliary materials, wherein the mass ratio of the main materials to the auxiliary materials is 10:3, a step of;
the main material comprises the following raw material components in parts by weight:
the auxiliary materials comprise the following raw material components in parts by weight:
4. a method for preparing the noise reduction composite cotton material for the passenger cabin of an aircraft according to any one of claims 1 to 3, wherein:
the method comprises the following steps:
mixing the L-lactic acid, the polyurethane, the magnesium carbonate and the aluminum oxide, wherein the mixing parameters are as follows: stirring at 70-90 deg.c and 5-10 MPa for 6-10 hr;
after the mixing operation is finished, dropwise adding the luffa fiber, the maleic anhydride, the divinylbenzene and the N-allyl carbamic acid tert-butyl ester for a first reaction, wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled to be 180-200 ℃, the reaction time is controlled to be 12 hours, and the reaction pressure is controlled to be 3MPa; cooling to room temperature after the first reaction;
then adding the polyvinyl alcohol, the ethylene-vinyl acetate copolymer and the ethanol and transferring the mixture into a constant-temperature water bath kettle, wherein the parameters of the water bath are as follows: heating in water bath at 55-80 deg.c for 20 hr; then slowly dropwise adding polyvinylpyrrolidone to perform a second reaction, wherein the parameter conditions of the second reaction are as follows: reacting for 0.5h at 110-120 ℃; and after the second reaction is finished, cooling to room temperature, and granulating by using a double-screw extruder.
5. The method for preparing the noise reduction composite cotton material for the aircraft passenger cabin according to claim 4, wherein the method comprises the following steps of:
wherein the parameters of the mixing are as follows:
stirring at 80deg.C under 7MPa for 7 hr.
6. The method for preparing the noise reduction composite cotton material for the aircraft passenger cabin according to claim 4, wherein the method comprises the following steps of:
wherein the parameter conditions of the first reaction are as follows: a high-temperature high-pressure stainless steel reaction kettle is adopted, the reaction temperature is controlled at 190 ℃, the reaction time is controlled at 12 hours, and the reaction pressure is controlled at 3MPa.
7. The method for preparing the noise reduction composite cotton material for the aircraft passenger cabin according to claim 4, wherein the method comprises the following steps of:
wherein the parameters of the water bath are as follows: heating in water bath at 64deg.C for 20 hr.
8. The method for preparing the noise reduction composite cotton material for the aircraft passenger cabin according to claim 4, wherein the method comprises the following steps of:
wherein the parameter conditions for the second reaction are as follows: the reaction was carried out at 115℃for 0.5h.
9. The method for preparing the noise reduction composite cotton material for the aircraft passenger cabin according to claim 4, wherein the method comprises the following steps of:
the parameters of the granulation are as follows:
the temperature of the first zone and the fifth zone of the double-screw extruder is 140 ℃, 160 ℃, 180 ℃, 200 ℃, 210 ℃, the temperature of the machine head is 220 ℃, the rotating speed of the screw is 60r/min, the blanking speed is 9r/min, and the diameter of the screw is 20mm.
10. A noise reducing composite cotton material for an aircraft passenger cabin according to claim 1 for use in noise reduction.
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