Honeycomb core composite structural material and preparation method thereof

A composite structure and honeycomb technology, applied in the field of materials, can solve the problems of difficult to meet the needs of materials, narrow effective damping temperature range, low strength and stiffness, etc., and achieve long service life, enhanced service ability and wide application prospects.

Active Publication Date: 2014-09-24
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polymer-based damping materials have disadvantages such as narrow effective damping temperature range and low mechanical strength, which limit their practical application in engineering to varying degrees.
[0004] Because of its light weight and high specific strength and specific stiffness, honeycomb structure materials have been widely used in high-speed trains, aviation, aerospace and other fields in recent years. Viscoelastic polymer elastomers or polymer fluids have excellent Damping performance, but its strength and stiffness are very low, it is difficult to meet the demand for materials in practical engineering applications

Method used

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  • Honeycomb core composite structural material and preparation method thereof
  • Honeycomb core composite structural material and preparation method thereof
  • Honeycomb core composite structural material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1, the aramid paper honeycomb sandwich composite damping material filled with PMMA / [EMIM][TFSI] solution

[0055] 1. Preparation of PMMA / [EMIM][TFSI] solution

[0056] Dissolve PMMA in dichloromethane, then add [EMIM][TFSI] ionic liquid, stir evenly, let stand at room temperature, let the dichloromethane basically volatilize, then dry under reduced pressure at 70°C to constant weight . A colorless, clear and transparent viscous solution was obtained. The ionic liquid solutions with PMMA mass fractions of 8wt%, 12wt% and 15wt% were prepared respectively. The PMMA / [EMIM][TFSI] solutions of different mass fractions were used for dynamic shear tests, and the results were as follows: figure 2 As shown, it can be seen that the PMMA / [EMIM][TFSI] solution exhibits a high damping loss factor.

[0057] 2. Preparation of honeycomb materials filled with ionic liquid polymers

[0058] Coat a layer of uncured Dow Corning186 liquid silicone rubber on a flat PTFE board...

Embodiment 2

[0062] Embodiment 2, aramid paper honeycomb sandwich composite damping material filled with liquid polyisobutylene (PIB)

[0063] According to the steps of Example 1, only the 8wt% PMMA / [EMIM][TFSI] solution was replaced with liquid polyisobutylene (PIB), and the composite damping material with a sandwich sandwich structure provided by the present invention was obtained.

[0064] The honeycomb sandwich composite structure material is composed of a honeycomb matrix material, a filling material and a sealing layer; wherein, the filling material liquid polyisobutylene (PIB) is embedded in the honeycomb matrix material; the sealing layer silicone rubber film is located on the upper and lower surfaces of the honeycomb matrix material .

[0065] image 3 Be storage modulus G ' of PIB in this embodiment, loss modulus G " and loss factor tan δ change curve (25 ℃) with angular frequency ω. As can be seen from the figure, PIB is in the frequency range 0.1-10rad / s of test All have high...

Embodiment 3

[0066] Embodiment 3, aramid paper honeycomb sandwich composite damping material filled with liquid polybutadiene (PB)

[0067] In this example, liquid PB was selected as the filling material to prepare the honeycomb sandwich composite structure.

[0068] Do a dynamic shear test on PB, the results are as follows Figure 4 As shown, it can be seen that the liquid PB has a high damping loss factor in the whole frequency range.

[0069] Coat a layer of uncured Dow Corning186 liquid silicone rubber on a flat PTFE board, gently place the cut aramid paper honeycomb core on it, and cure at 60°C for 3 hours, the lower part of the honeycomb core is covered with a silicone rubber film Adhesive seal.

[0070] Use a syringe to fill the PB into the holes of the honeycomb, vacuumize for 0.5h, until the vacuum degree is 200mbar, after completely eliminating the air bubbles inside, mix with 4%wt crosslinking agent trimethylolpropane tris(3-mercaptopropane) Ester) PB solution coated on the u...

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Abstract

The invention discloses a honeycomb core composite structural material and a preparation method thereof. The composite material comprises a honeycomb base material, a filling material and sealing layers, wherein the filling material is embedded into the honeycomb base material; the sealing layers are positioned on the upper and lower surfaces of the honeycomb base material; the filling material is a damping material, and specifically is macromolecule fluid with viscoelasticity. Compared with a conventional damping material, the structural material successfully achieves combination of high strength and high damping property, meanwhile has the advantages of simplicity and stability of preparation process, long service life and the like, and meets the requirements of the field with special demands, such as the communication and transportation industry and the spaceflight industry.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a damping material, in particular to a honeycomb sandwich composite structure material and a preparation method thereof. Background technique [0002] Vibration will not only cause damage to the mechanical structure and reduce the accuracy of machines, instruments or tools, but also radiate noise to the surroundings, pollute the environment, and cause increasingly serious harm to the current society. Therefore, it is of great significance to research and develop damping materials or structures with excellent performance for vibration and noise reduction. [0003] The main working principle of damping material is to absorb vibration mechanical energy and convert it into other forms of energy (such as heat energy, electric energy, magnetic energy, sound energy, etc.) and dissipate it. As a traditional damping material, polymer-based damping materials take advantage of their viscous damping ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/06B32B25/08B32B27/04B32B3/12
Inventor 汪东沈衡赵宁张小莉董海侠
Owner INST OF CHEM CHINESE ACAD OF SCI
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