Sandwich structure based on carbon foam as well as preparation method and maintenance method of sandwich structure

A sandwich structure and carbon foam technology, applied in the field of composite materials, can solve the problems of function and performance research and application without carbon foam sandwich structure, and achieve the effects of strong adaptability to complex environments, good machining performance, and long life

CN113771445AActive Publication Date: 2021-12-10BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-12-10

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Abstract

The invention discloses a sandwich structure based on carbon foam as well as a preparation method and maintenance method of the sandwich structure The sandwich structure comprises a carbon foam sandwich and a panel, wherein the carbon foam sandwich is composed of one or more of resin-based carbon foam, coal-based carbon foam and asphalt-based carbon foam. The carbon foam sandwich has the advantages of thermoelectric conduction property, tailorability, large modulus, high strength, impact resistance, good processability, stable physical and chemical properties, flame retardance, no toxicity, moisture resistance, wave absorption, capability of being compounded with various functional materials and the like; the carbon foam sandwich can be matched with the panel made of different materials according to requirements, so that the sandwich structure with outstanding key functions and excellent comprehensive performance can be formed under different environments; and the sandwich structure can be widely applied to military and civil fields such as aerospace, automobiles and ships, composite material manufacturing, buildings, safety protection and the like.
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Description

technical field

[0001] The invention relates to the technical field of composite materials, in particular to a lightweight sandwich structure applied in a complex environment and requiring high mechanical and thermal properties, and in particular to a carbon foam-based sandwich structure and its preparation method and maintenance method. Background technique

[0002] The sandwich structure has been widely used in many fields because of its high specific stiffness, good stability, and good manufacturability. With the continuous advancement of science and technology, the requirements for the performance of sandwich structures are getting higher and higher. Its development direction is mainly reflected in: 1) Improving the compression and bending load-bearing efficiency of sandwich structures; 2) Making sandwich structures have wave absorption, heat insulation, heat conduction, 3) Improve the survivability of the sandwich structure in complex environments such as high temperatu...

Examples

Embodiment

[0070] A lightweight structure-insulation integrated shell sandwich structure based on carbon foam, see image 3 . The sandwich structure includes a coal-based carbon foam sandwich core 31, an outer panel 32, and an inner panel 33, wherein the coal-based carbon foam sandwich core 31 has a density of 0.45 g / cm 3 1. Insulating coal-based carbon foam with room temperature thermal conductivity of 0.08W / (m·K), the outer panel 32 is made of carbon / carbon composite material, and the inner panel 33 is made of Shuangma resin-based carbon fiber reinforced composite material.

[0071] The preparation method of the sandwich structure described in this example comprises the following operations:

[0072] 1) The coal-based carbon foam sandwich core 31 is machined. Foam the coal-based carbon into the desired shape with a CNC machine tool, and the thickness of the foam is 25mm;

[0073] 2) Forming and compounding of the outer panel 32 . The outer surface of the foam is covered with a carb...