Mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material and preparation method thereof

Abstract

The invention relates to the technical field of noise reduction core materials, in particular to a mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material and a preparation method thereof, and the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material is prepared from the following raw materials in parts by mass: 3-20 parts of mesoporous ceramic, 75.6-92.6 parts of chlorinated polypropylene carbonate, 4 parts of azodicarbonamide and 0.4 part of zinc oxide. The mesoporous ceramic / chlorinated polypropylene carbonate foam material has the advantages of being low in density, high in strength, excellent in sound insulation performance, environmentally friendly and the like, the transmission loss at the intermediate frequency of 1000-2000 Hz can reach 34-60 dB, the compression modulus can reach 10.6-26.8 MPa, the compression strength can reach 0.24-0.45 MPa, and the mesoporous ceramic / chlorinated polypropylene carbonate foam material can serve as a sound insulation foam core material to be filled in a building wall and has the advantages of being good in sound insulation performance and the like. Good application prospects are realized in the fields of wall earthquake prevention and sound insulation in the building industry.

Description

Technical Field

[0001] The invention relates to the technical field of noise reduction core materials, and in particular to a mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material and a preparation method thereof. Background Art

[0002] With the development of modern society, the problem of noise pollution is becoming increasingly serious, which has a negative impact on people's quality of life and health. In the fields of construction, transportation, industrial production, and household appliances, the demand for noise control and optimization of acoustic environment is increasing. In order to effectively reduce noise and improve indoor and outdoor acoustic environments, the development of materials with excellent sound insulation performance has become a research hotspot. Due to its lightweight, porous, and customizable structure, sound insulation foam core materials show broad application prospects in sound absorption and sound insulation. Studies have shown that by adjusting the pore size, density, thickness and other physical parameters of foam materials, their sound insulation effect can be significantly improved. At the same time, modern industry has increasingly higher requirements for the comprehensive performance of materials, requiring not only sound insulation foam core materials to have excellent acoustic properties, but also good mechanical strength, weather resistance and environmental protection. Therefore, research and development of sound insulation foam core materials with superior performance has become an important topic in the field of acoustic materials, which can not only meet diverse market needs, but also provide a new technical path for achieving sustainable development.

[0003] At present, a considerable number of lightweight partition walls at home and abroad have poor sound insulation performance. The sound insulation of single-layer walls cannot meet the minimum sound insulation requirements of residential partition walls and can only be used for intra-suite partition walls. The traditional foam core material production method mainly relies on chemical foaming agents, which pose a threat to the environment and human health at high temperatures. As sound insulation wall materials, there are five main categories: concrete walls, block walls, strip walls, thin plate composite walls, and sprayed cement mortar surface walls. Most of these walls improve their sound insulation performance by increasing the wall thickness and making them into solid materials. The sound insulation foam core material is a fine closed bubble filled with gas, which is characterized by light weight, impact resistance, shock absorption, and sound insulation. Chinese patent CN202122574634.6 discloses a method for preparing a sound insulation and noise reduction polystyrene foam board, which needs to be spliced ​​and combined, uses a lot of sound insulation and fireproof fillers, and the process is complicated. Chinese patent CN202320026257.9 discloses a high-efficiency thermal insulation foam board with sound insulation effect. The selected material polystyrene is non-degradable, and the problem of waste recycling needs to be considered. The mesoporous ceramics in this article have high bactericidal properties, chlorinated polypropylene carbonate is degradable, and azodicarbonamide is selected to be food grade, which meets the requirements of green and pollution-free in terms of material selection. The compression modulus of the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material of the present invention can reach 5.6-26.8MPa, and the compression strength can reach 0.11-0.45MPa. The transmission loss at the medium frequency of 1000-2000Hz is 34-60dB. It is a good foam core material for a new type of lightweight sound insulation wall, and has good application prospects in the fields of wall earthquake protection and sound insulation in the construction industry. Summary of the invention

[0004] One of the purposes of the present invention is to provide a mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material. Through the synergistic effect of the nanopore structure of the mesoporous ceramic and the micropore structure of the foam, the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam has a good noise reduction effect. The mesoporous ceramic / chlorinated polypropylene carbonate foam material of the present invention has the advantages of low density, high strength, excellent sound insulation performance, and environmental protection.

[0005] The second object of the present invention is to provide a mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material and a preparation method thereof, the preparation process is simple and easy to adjust.

[0006] The solution adopted by the present invention to achieve one of the purposes is: a mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material is made of the following raw materials in parts by mass: 3-20 parts of mesoporous ceramic, 75.6-92.6 parts of chlorinated polypropylene carbonate (CPPC), 4 parts of azodicarbonamide (ADC), and 0.4 parts of zinc oxide.

[0007] Preferably, the mesoporous ceramic is prepared by mixing red stone, alkaline sodium bentonite, zinc stone, asphaltite with starch, silver citrate, and ferrous citrate aqueous solution, drying in an airtight condition, calcining at 700-1000° C. for 4-6 hours, and then cooling and grinding.

[0008] The surface of the mesoporous ceramic prepared by the present invention has hook-shaped crystallized iron nanoparticles and silver nanoparticles, and the contact area with the CPPC matrix is ​​increased.

[0009] Preferably, the chlorinated polypropylene carbonate is prepared by modifying polypropylene carbonate through an aqueous phase suspension chlorination reaction.

[0010] The solution adopted by the present invention to achieve the second purpose is: a method for preparing the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material, wherein the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material is prepared by melt blending and physical restraint foaming of mesoporous ceramic, chlorinated polypropylene carbonate, azodicarbonamide, and zinc oxide.

[0011] Preferably, the method comprises the following steps:

[0012] (1) Calculate the required mass fractions of each raw material and mix them uniformly in a mixer to obtain a mixed raw material;

[0013] (2) pouring the mixed raw materials in step (1) into a torque rheometer for melt blending to obtain a CPPC-based composite material;

[0014] (3) hot pressing the CPPC-based composite material after melt blending in step (2) to prepare a CPPC-based composite material sheet;

[0015] (4) The CPPC-based composite material sheet is placed in a polytetrafluoroethylene mold and the foaming temperature, foaming time and mold size are controlled to perform physical restraint foaming to obtain a mesoporous ceramic / CPPC foam material.

[0016] Preferably, in step (1), when premixing, the rotation speed is 1000-2000 r / min and the time is 20-40 s.

[0017] Preferably, in step (2), during melt blending, the rotation speed is 40-60 r / min, the temperature is 120-140° C., and the time is 12 min.

[0018] Preferably, in step (3), the thickness of the CPPC-based composite material sheet is 2-5 mm, and the hot pressing conditions are: hot pressing temperature 120-140° C., pressure 10-15 MPa, and holding time 5-8 min.

[0019] Preferably, in step (4), the foaming conditions of the mesoporous ceramic / chlorinated polypropylene carbonate foam material are: foaming temperature 165-200° C., and foaming time 10-30 min.

[0020] The surface of the mesoporous ceramic used in the present invention has hook-shaped crystallized iron nanoparticles and silver nanoparticles, and the contact area with the CPPC matrix is ​​increased. At the same time, the decomposition product of the foaming agent ADC has an amide bond (-CO-NH-) with a large polarity, which is easy to form a hydrogen bond with the hydroxyl group (-OH) in the mesoporous ceramic, so that the mesoporous ceramic in the mesoporous ceramic / CPPC foam material is tightly combined with the CPPC matrix; the mesoporous ceramic can be used as a heterogeneous nucleating agent to promote pore nucleation during the foaming process, reduce the pore diameter, and increase the propagation path of the sound wave in the foam material. At the same time, it can also be used as a reinforcing phase to improve the mechanical properties of the foam material.

[0021] The present invention has the following advantages and beneficial effects:

[0022] The mesoporous ceramic / CPPC sound insulation foam core material of the present invention comprises a micron-scale closed-cell and nano-scale open-cell pore structure, a mesoporous ceramic and a CPPC matrix. The pore structure promotes multiple reflections, refractions and collisions of incident sound waves in the pores to dissipate sound energy. The mesoporous ceramic is tightly combined with the CPPC matrix, so that a small portion of the sound waves entering the matrix are further reflected and collided in the mesoporous ceramic with the nanopore structure to dissipate sound energy. Through the synergistic effect of the nanopore structure of the mesoporous ceramic and the micropore structure of the pores, the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam has a good noise reduction effect.

[0023] The mesoporous ceramic / chlorinated polypropylene carbonate foam material of the present invention has the advantages of low density, high strength, excellent sound insulation performance, environmental protection, etc. The transmission loss at the medium frequency of 1000-2000Hz can reach 34-60dB, the compression modulus can reach 10.6-26.8MPa, and the compression strength can reach 0.24-0.45MPa. It can be used as a sound insulation foam core material to fill in building walls, and has good application prospects in the fields of wall earthquake resistance and sound insulation in the construction industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a diagram of the sound wave transmission mechanism of the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam of the present invention;

[0025] Figure 2 This is a microscopic morphology of the mesoporous ceramic of the present invention;

[0026] Figure 3 This is the microscopic morphology of the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam of the present invention. DETAILED DESCRIPTION

[0027] For a better understanding of the present invention, the following examples are provided to further illustrate the present invention, but the present invention is not limited to the following examples.

[0028] In the present invention, chlorinated polypropylene carbonate was provided by Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, mesoporous ceramics were provided by Wuhan Maifeite Technology Co., Ltd., azodicarbonamide was purchased from Henan Shuangcheng Food Co., Ltd., and zinc oxide was purchased from Shanghai MacLean Biochemical Technology Co., Ltd.

[0029] Figure 1 This is a diagram of the sound wave transmission mechanism of the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam of the present invention.

[0030] The mesoporous ceramic of the present invention is prepared by mixing red stone, alkaline sodium bentonite, zinc stone, asphaltite with starch, silver citrate, and ferrous citrate aqueous solution, drying under a nitrogen atmosphere at 120°C, calcining at 800°C for 4 hours, and then cooling and grinding. Figure 2 The figure shows the microscopic morphology of the mesoporous ceramic of the present invention. It can be seen from the figure that the pore size of the mesoporous ceramic is in the range of 20-50nm, and 5-10nm "hook-shaped" crystals are distributed on the surface and in the pore channels. It is composed of zero-valent iron nanoparticles and silver nanoparticles, which increase the contact area with the substrate. The addition of mesoporous ceramic as a doping phase improves the acoustic and mechanical properties of the mesoporous ceramic / chlorinated polypropylene carbonate foam.

[0031] Example 1

[0032] The chlorinated polypropylene carbonate was placed in an oven at 50°C and dried for 2 hours, then taken out, 15 parts of mesoporous ceramics, 80.6 parts of chlorinated polypropylene carbonate, 4 parts of azodicarbonamide, and 0.4 parts of zinc oxide were weighed and mixed evenly in a mixer at a speed of 2000 r / min for 40 seconds; the mixture was poured into a torque rheometer, and melt-blended at a temperature of 140°C and a speed of 60 r / min for 12 minutes to obtain a CPPC-based composite material; the CPPC-based composite material was heated to 140°C and melt-blended for 12 minutes. ℃ , pressure 15MPa, pressure holding 5min, hot pressing 2mm CPPC-based composite sheet; placing the sheet in a Φ29mm×5mm polytetrafluoroethylene mold, keeping it at 190℃ for 20min for foaming, and finally cooling and shaping at room temperature to obtain a mesoporous ceramic / CPPC foam material. The compression modulus of the prepared mesoporous ceramic / CPPC foam material is 17.2MPa, the compression strength is 0.33MPa, the average pore size is 552μm, the transmission loss of 1000-2000Hz is 36-45dB, and its microscopic morphology is shown in the figure Figure 3 As shown in (d), the pore structure is an elliptical closed pore with a relatively regular shape, a moderate pore diameter, and a thick pore wall. The sound insulation performance is improved to a certain extent, and the mechanical properties are greatly improved.

[0033] Example 2

[0034] The chlorinated polypropylene carbonate was placed in an oven at 50°C and dried for 2 hours, then taken out, 6 parts of mesoporous ceramics, 89.6 parts of chlorinated polypropylene carbonate, 4 parts of azodicarbonamide, and 0.4 parts of zinc oxide were weighed and mixed evenly in a mixer at a speed of 1500 r / min for 30 seconds; the mixture was poured into a torque rheometer, and melt-blended at a temperature of 130°C and a speed of 50 r / min for 12 minutes to obtain a CPPC-based composite material; the CPPC-based composite material was heated at a temperature of 130 ℃ , pressure 12MPa, pressure holding 5min, hot pressing 3mm CPPC-based composite sheet; placing the sheet in a Φ29mm×6mm polytetrafluoroethylene mold, keeping it at 180℃ for 20min for foaming, and finally cooling and shaping at room temperature to obtain a mesoporous ceramic / CPPC foam material. The compression modulus of the prepared mesoporous ceramic / CPPC foam material is 15.9MPa, the compression strength is 0.28MPa, the average pore size is 575μm, the transmission loss of 1000-2000Hz is 38-48dB, and its microscopic morphology is shown in the figure below. Figure 3 As shown in (e), the pore structure is an elliptical closed pore with a moderate pore diameter and a relatively regular shape. The sound insulation performance is improved to a certain extent, and the mechanical properties are also improved to a certain extent.

[0035] Example 3

[0036] The chlorinated polypropylene carbonate was placed in an oven at 50°C and dried for 2h, then taken out, 20 parts of mesoporous ceramics, 75.6 parts of chlorinated polypropylene carbonate, 4 parts of azodicarbonamide, and 0.4 parts of zinc oxide were weighed and mixed evenly in a mixer at a speed of 2000r / min for 40s; the mixture was poured into a torque rheometer, and melt-blended at a temperature of 140°C and a speed of 60r / min for 12min to obtain a CPPC-based composite material; the CPPC-based composite material was heated at a temperature of 140 ℃ , pressure 15MPa, pressure holding 5min, hot pressing 3mm CPPC-based composite sheet; placing the sheet in a Φ29mm×7mm polytetrafluoroethylene mold, keeping it at 200℃ for 20min for foaming, and finally cooling and shaping at room temperature to obtain a mesoporous ceramic / CPPC foam material. The compression modulus of the prepared mesoporous ceramic / CPPC foam material is 26.8MPa, the compression strength is 0.45MPa, the average pore size is 531μm, the transmission loss of 1000-2000Hz is 39-46dB, and its microscopic morphology is shown in the figure Figure 3 As shown in (f), the pore structure is an elliptical closed pore with a moderate pore diameter and a relatively regular shape, and there are a small number of small holes. The sound insulation performance is improved to a certain extent, and the mechanical properties are greatly improved.

[0037] Example 4

[0038] The chlorinated polypropylene carbonate was placed in an oven at 50°C and dried for 2 hours, then taken out, 12 parts of mesoporous ceramics, 83.6 parts of chlorinated polypropylene carbonate, 4 parts of azodicarbonamide, and 0.4 parts of zinc oxide were weighed and mixed evenly in a mixer at a speed of 2000 r / min for 40 seconds; the mixture was poured into a torque rheometer, and melt-blended at a temperature of 140°C and a speed of 60 r / min for 12 minutes to obtain a CPPC-based composite material; the CPPC-based composite material was heated to 140°C and then melt-blended for 12 minutes. ℃ , pressure 15MPa, pressure holding 5min, hot pressing 4mm CPPC-based composite sheet; placing the sheet in a Φ29mm×9mm polytetrafluoroethylene mold, keeping it at 190℃ for 20min for foaming, and finally cooling and shaping at room temperature to obtain a mesoporous ceramic / CPPC foam material. The compression modulus of the prepared mesoporous ceramic / CPPC foam material is 15.2MPa, the compression strength is 0.38MPa, the average pore size is 588μm, the transmission loss of 1000-2000Hz is 36-47dB, and its microscopic morphology is shown in the figure below. Figure 3 As shown in (g), the hole structure is a circular closed hole with thinner hole walls in some areas. The sound insulation performance is improved to a certain extent and the mechanical properties are greatly improved.

[0039] Example 5

[0040] The chlorinated polypropylene carbonate was placed in an oven at 50°C and dried for 2 hours, then taken out, 3 parts of mesoporous ceramics, 92.6 parts of chlorinated polypropylene carbonate, 4 parts of azodicarbonamide, and 0.4 parts of zinc oxide were weighed and mixed evenly in a mixer at a speed of 1000 r / min for 20 seconds; the mixture was poured into a torque rheometer, and melt-blended at a temperature of 120°C and a speed of 40 r / min for 12 minutes to obtain a CPPC-based composite material; the CPPC-based composite material was heated at a temperature of 120 ℃ , pressure 10MPa, pressure holding 5min, hot pressing 5mm CPPC-based composite sheet; placing the sheet in a Φ29mm×10mm polytetrafluoroethylene mold, keeping it at 170℃ for 20min for foaming, and finally cooling and shaping at room temperature to obtain a mesoporous ceramic / CPPC foam material. The compression modulus of the prepared mesoporous ceramic / CPPC foam material is 10.6MPa, the compression strength is 0.29MPa, the average pore size is 671μm, the transmission loss of 1000-2000Hz is 49-60dB, and its microscopic morphology is shown in the figure Figure 3 As shown in (h), the hole structure is a circular closed hole with thinner hole walls in some parts. The sound insulation performance is greatly improved and the mechanical properties are improved to a certain extent.

[0041] Example 6

[0042] The chlorinated polypropylene carbonate was placed in an oven at 50°C and dried for 2 hours, then taken out, 9 parts of mesoporous ceramics, 86.6 parts of chlorinated polypropylene carbonate, 4 parts of azodicarbonamide, and 0.4 parts of zinc oxide were weighed and mixed evenly in a mixer at a speed of 1500 r / min for 30 seconds; the mixture was poured into a torque rheometer, and melt-blended at a temperature of 130°C and a speed of 50 r / min for 12 minutes to obtain a CPPC-based composite material; the CPPC-based composite material was heated at a temperature of 130 ℃ , pressure 12MPa, pressure holding 5min, hot pressing 4mm CPPC-based composite sheet; placing the sheet in a Φ29mm×8mm polytetrafluoroethylene mold, keeping it at 180℃ for 20min for foaming, and finally cooling and shaping at room temperature to obtain a mesoporous ceramic / CPPC foam material. The compression modulus of the prepared mesoporous ceramic / CPPC foam material is 12.8MPa, the compression strength is 0.24MPa, the average pore size is 666μm, the transmission loss of 1000-2000Hz is 39-50dB, and its microscopic morphology is shown in the figure below. Figure 3 As shown in (i), the hole structure is a circular closed hole, the hole wall is locally thin, the number of small holes is increased, the sound insulation performance is improved to a certain extent, and the mechanical properties are improved to a certain extent.

[0043] Comparative Example 1

[0044] The chlorinated polypropylene carbonate was placed in an oven at 50°C and dried for 2 hours, then taken out, 95.6 parts of chlorinated polypropylene carbonate, 4 parts of azodicarbonamide, and 0.4 parts of zinc oxide were weighed and mixed evenly in a mixer at a speed of 1000 r / min for 20 seconds; the mixture was poured into a torque rheometer, and melt-blended at a temperature of 120°C and a speed of 40 r / min for 12 minutes to obtain a CPPC-based composite material; the CPPC-based composite material was heated at a temperature of 120 ℃ , pressure 10MPa, pressure holding 5min, hot pressing to obtain 3mm thick CPPC-based composite material sheet; placing the sheet in a Φ29mm×7mm polytetrafluoroethylene mold, keeping it at 165℃ for 20min for foaming, and finally cooling and shaping at room temperature to obtain CPPC foam material. The compression modulus of the obtained CPPC foam material is 5.6MPa, the compression strength is 0.11MPa, the average pore size is 804μm, the transmission loss of 1000-2000Hz is 34-40dB, and its microscopic morphology is shown in the figure below. Figure 3 As shown in (a), the hole structure is an elliptical closed hole, the hole wall is thicker, the hole diameter is larger than that of the embodiment, and the sound insulation performance and mechanical properties are lower than those of the embodiment.

[0045] Comparative Example 2

[0046] Polyurethane foam, compression modulus is 0.07MPa, compression strength is 0.004MPa, average cell diameter is 767μm, transmission loss at 1000-2000Hz is 12-18dB, and its microscopic morphology is as follows Figure 3 As shown in (b), the pore structure is spherical open pores with high porosity, and the sound insulation performance and mechanical properties are much lower than those in the embodiment.

[0047] Comparative Example 3

[0048] Ceramic / polyurethane foam, compression modulus is 0.11MPa, compression strength is 0.01MPa, average cell diameter is 715μm, transmission loss at 1000-2000Hz is 20-23dB, and its microscopic morphology is shown in the figure below: Figure 3 As shown in (c), the pore structure is spherical open pores with high porosity, and the sound insulation performance and mechanical properties are improved compared with those of comparative example 2, while the sound insulation performance and mechanical properties are much lower than those of the embodiment.

[0049] Table 1 Performance parameters of the sound insulation foams prepared in Examples 1-6 and Comparative Examples 1-3

[0050]

[0051]

[0052] It can be seen from the data in Table 1 that the transmission loss of the mesoporous ceramic / chlorinated polypropylene carbonate foam material of the present invention at the medium frequency of 1000-2000Hz can reach 34-60dB, which is 32%-66% higher than that of the chlorinated polypropylene carbonate foam material, the compression modulus can reach 10.6-26.8MPa, which is 89%-378% higher than that of the chlorinated polypropylene carbonate foam material, and the compression strength can reach 0.24-0.45MPa, which is 118%-309% higher than that of the chlorinated polypropylene carbonate foam material.

[0053] The above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and changes can be made without departing from the principle of the present invention, and these improvements and changes are also regarded as the protection scope of the present invention.

Claims

1. A mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material, characterized in that: The invention is prepared from the following raw materials in parts by weight: 3-20 parts of mesoporous ceramics, 75.6-92.6 parts of chlorinated polypropylene carbonate, 4 parts of azodicarbonamide and 0.4 parts of zinc oxide.

2. The mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material according to claim 1, characterized in that: The mesoporous ceramic is prepared by mixing red stone, alkaline sodium bentonite, zinc stone, asphalt stone with starch, silver citrate and ferrous citrate aqueous solution, drying under air-tight conditions, calcining at 700-1000° C. for 4-6 hours, and then cooling and grinding.

3. The mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material according to claim 1, characterized in that: The chlorinated polypropylene carbonate is prepared by modifying polypropylene carbonate through a water phase suspension chlorination reaction.

4. A method for preparing a mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material according to any one of claims 1 to 3, characterized in that: The mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material is prepared by melt blending and physically restraining foaming of mesoporous ceramic, chlorinated polypropylene carbonate, azodicarbonamide and zinc oxide.

5. The method for preparing the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material according to claim 4, characterized in that: The following steps are involved: (1) Calculate the required mass fractions of each raw material and mix them uniformly in a mixer to obtain a mixed raw material; (2) pouring the mixed raw materials in step (1) into a torque rheometer for melt blending to obtain a CPPC-based composite material; (3) hot pressing the CPPC-based composite material after melt blending in step (2) to prepare a CPPC-based composite material sheet; (4) The CPPC-based composite material sheet is placed in a polytetrafluoroethylene mold and the foaming temperature, foaming time and mold size are controlled to perform physical restraint foaming to obtain a mesoporous ceramic / CPPC foam material.

6. The method for preparing the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material according to claim 5, characterized in that: In step (1), when premixing, the rotation speed is 1000-2000 r / min, and the time is 20-40 s.

7. The method for preparing the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material according to claim 5, characterized in that: In step (2), during melt blending, the rotation speed is 40-60 r / min, the temperature is 120-140° C., and the time is 12 min.

8. The method for preparing the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material according to claim 5, characterized in that: In step (3), the thickness of the CPPC-based composite material sheet is 2-5 mm, and the hot pressing conditions are: hot pressing temperature 120-140° C., pressure 10-15 MPa, and holding time 5-8 min.

9. The method for preparing the mesoporous ceramic / chlorinated polypropylene carbonate sound insulation foam core material according to claim 5, characterized in that: In step (4), the foaming conditions of the mesoporous ceramic / chlorinated polypropylene carbonate foam material are: foaming temperature 165-200° C., and foaming time 10-30 min.

Images