Unlock instant, AI-driven research and patent intelligence for your innovation.

Modified carbon nanotube reinforced EPDM rubber insulation material and preparation method

A technology of EPDM rubber and carbon nanotubes, which is applied in the field of ablation-resistant aerospace materials, can solve problems such as unsatisfactory ablation resistance performance, and achieve the effects of reducing thermal conductivity, reducing thermal conductivity, and reducing carbonization and ablation rate

Active Publication Date: 2021-02-02
NORTHWESTERN POLYTECHNICAL UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of science, new solid rocket motors pay more attention to high speed, high maneuverability and high reliability. The ablation resistance of existing EPDM insulation materials can no longer meet the requirements of contemporary solid rocket motors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified carbon nanotube reinforced EPDM rubber insulation material and preparation method
  • Modified carbon nanotube reinforced EPDM rubber insulation material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The embodiment of the present application provides a method for preparing modified carbon nanotubes, comprising the following steps:

[0037] Weigh the carbon nanotubes and put them into a high-temperature furnace, and evacuate the high-temperature furnace to be less than or equal to -0.09MPa. The carbon nanotubes used in this embodiment have an inner diameter of 0.8-5 nm, an outer diameter of 0.9-15 nm, and a length of 1-20 μm. Preferably, the carbon nanotubes are multi-walled carbon nanotubes, the inner diameter of the multi-walled carbon nanotubes is 3-5 nm, the outer diameter is 8-15 nm, the length is 3-12 μm, the number of tube wall layers is 8-15, and the aspect ratio is 230-200 nm. 930.

[0038] Inert gas is introduced into the high-temperature furnace until the pressure in the high-temperature furnace is greater than the standard atmospheric pressure and the purity of the inert gas in the high-temperature furnace is greater than or equal to 98%, and the gas out...

Embodiment 1

[0049] Yet another embodiment of the present application provides a modified carbon nanotube-reinforced EPDM rubber insulation material, which consists of the following raw materials in parts by weight:

[0050] 100 parts of EPDM rubber, 10 parts of aramid fiber, 20 parts of phenolic resin, 20 parts of fumed silica, 10 parts of zinc borate, 10 parts of pre-coated carbon nanotubes, 10 parts of paraffin oil, 1.5 parts of sulfur, DCP 4.5 copies. Using the thermal insulation material component in this embodiment, the thermal insulation effect is the best, and the carbonization and ablation rate is the lowest.

[0051] Yet another embodiment of the present application provides a method for preparing a modified carbon nanotube-reinforced EPDM thermal insulation material, comprising the following steps:

[0052] Weigh 100 parts by weight of EPDM rubber, and prepare an EPDM rubber matrix; weigh 5 to 15 parts by weight of aramid fiber, add it to the EPDM rubber matrix, and knead until...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The preparation method discloses a modified carbon nanotube reinforced ethylene propylene diene monomer thermal insulation material and a preparation method thereof. The preparation method comprises the following steps: weighing carbon nanotubes, putting the carbon nanotubes into a high-temperature furnace, and vacuumizing the high-temperature furnace until the pressure of the high-temperature furnace is less than or equal to -0.09 MPa; introducing an inert gas into the high-temperature furnace until the pressure in the high-temperature furnace is greater than the standard atmospheric pressure, opening a gas outlet of the high-temperature furnace, and keeping circulation of the inert gas; raising the temperature of the high-temperature furnace to 800-1300 DEG C; stopping inputting the inert gas, and inputting a hydrocarbon carbon source gas into the high-temperature furnace at the flow rate of 50-600ml / min; keeping the temperature of the high-temperature furnace until modified carbon nanotubes are formed. According to the embodiment of the invention, after the carbon nanotubes are subjected to vapor deposition pretreatment in the high-temperature tubular furnace, the carbon nanotubes are coated with a deposited carbon protection layer, so that the structure of the carbon nanotube fillers is changed, the thermal conductivity of the thermal insulation material and the generated carbonization layer is reduced, and the carbonization ablation rate of the thermal insulation material is also obviously reduced.

Description

【Technical field】 [0001] The invention belongs to the technical field of ablation-resistant aerospace materials, and in particular relates to a modified carbon nanotube-reinforced EPDM rubber thermal insulation material and a preparation method. 【Background technique】 [0002] EPDM thermal insulation material is mainly based on EPDM rubber, mixed with fillers such as phenolic, fiber and inorganic fillers, and has the characteristics of low density, aging resistance, ablation resistance, good thermal insulation performance and beneficial mechanical properties. Therefore, it is widely used as the thermal insulation material in the solid rocket motor. [0003] During the ablation process of the EPDM thermal insulation material, a carbonized layer is formed on the surface. The carbonized layer is an important barrier for the thermal insulation material to resist high-temperature gas ablation and particle erosion in the combustion chamber. Improving the strength of the carbonized...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L77/10C08L61/06C08L91/06C08K13/06C08K3/36C08K3/38C08K9/02C08K3/04C08K3/06C08K5/14
CPCC08K2003/387C08L23/16C08L2201/02C08L2201/08C08L2205/035C08L2205/16C08L77/10C08L61/06C08L91/06C08K13/06C08K3/36C08K3/38C08K9/02C08K3/041C08K3/06C08K5/14
Inventor 李江惠昆王逸溦郭梦飞李康
Owner NORTHWESTERN POLYTECHNICAL UNIV