Polymer/foam aluminum integrated composite sandwich board

A foamed aluminum plate and polymer technology, applied in the direction of layered products, metal layered products, chemical instruments and methods, etc., can solve the problems of poor performance, low bonding strength, and easy corrosion, etc., to achieve superior energy absorption performance, Low yield strength, anti-corrosion effect

Inactive Publication Date: 2014-07-23
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of method is that the bonding strength is low, the performance is poor under high temperature or corrosion conditions, and the peeling of the core layer and the surface layer is easy to occur
The disadvantage of this method is that the combination of flux and aluminum is prone to corrosion problems, and the welding area is limited to the hole edge, which will also lead to a decrease in structural strength
Studies have shown that the strength of the formed composite material is much higher than that of pure foamed aluminum. For example, the compressive yield strength of pure foamed aluminum is only 5-8Mpa, while the compressive yield strength of epoxy resin/foamed aluminum composite material is as high as 40-60Mpa, which

Method used

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  • Polymer/foam aluminum integrated composite sandwich board
  • Polymer/foam aluminum integrated composite sandwich board
  • Polymer/foam aluminum integrated composite sandwich board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Prepare polyurethane / aluminum foam integrated composite sandwich panel, the design thickness of polyurethane surface layer is 2mm, and the design thickness of polyurethane / aluminum foam composite layer is 3mm:

[0023] (1) Choose a spherical open-cell foam aluminum plate with a porosity of 85%, a through-porosity of 90%, and a pore size of 4mm. The plate size is (2000×1000×30) mm. Use low-concentration HCl acid solution to clean, then clean in low-concentration NaoH alkali solution, then rinse with clean water, dry and use silane coupling agent alcohol solution for treatment, and dry for use.

[0024] (2) if figure 2 As described above, a mold 6 with a height of 5 mm is prepared, and the bottom of the mold is provided with 8 thimbles for controlling the thickness of the pure polymer layer, and the height of the thimbles is 2 mm. After mixing the two raw materials of polyurethane, white material polyether triol N303 and black material toluene diisocyanate PM200 1:1, st...

Embodiment 2

[0027] Prepare epoxy resin / foam aluminum integrated composite sandwich panel, the design thickness of epoxy resin surface layer is 3mm, and the design thickness of epoxy resin / foam aluminum composite layer is 2mm:

[0028] (1) Choose a mesh-shaped open-cell foam aluminum plate with a porosity of 80%, a through-porosity of 90%, and a pore size of 3mm. The plate size is (2000×1000×30) mm. Use low-concentration HCl acid solution to clean, then clean in low-concentration NaoH lye, rinse with clean water, dry and use silane coupling agent alcohol solution for treatment, and dry for use.

[0029] (2) Prepare a mold with a height of 5mm, and set 8 thimbles at the bottom of the mold to control the thickness of the pure polymer surface layer, and the height of the thimbles is 3mm. The type of epoxy resin is selected as (E-44), and the curing agent is polyamide active curing agent (650#). Heat it in a water bath at 80°C until it is clear and free of bubbles. Mix the epoxy resin and curi...

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Abstract

The invention provides a polymer/foam aluminum integrated composite sandwich board. According to the polymer/foam aluminum integrated composite sandwich board, a foam aluminum core layer is arranged in the middle of the sandwich board and polymer/foam aluminum composite layers are arranged on upper and lower faces of the sandwich board; a five-layered structure with pure polymer protection surface layers are arranged on upper and lower surface layers. A preparation method of the polymer/foam aluminum integrated composite sandwich board comprises the following steps: washing a foam aluminum board to remove oil; drying for later use; preparing a polymer into fluid and injecting the fluid into a mould; arranging a plurality of thimbles for controlling the thickness of pure polymers on the surface layers at the bottom of the mould, wherein the height of the mould is equal to the sum of the thicknesses of the pure polymer surface layers and the thicknesses of the polymer/foam aluminum composite layers; then, slowly placing a treated foam aluminum board to be used into the mould, curing and de-molding; cutting surplus polyurethane on the edge; and overturning the board and repeating the preparation process. The polymer/foam aluminum integrated composite sandwich board is simple in process, low in cost, high in operability and good in integrity; a problem of cracking releasing of an interface between a core material and a panel and a surface corrosion problem are avoided.

Description

technical field [0001] The invention relates to a polymer / foam aluminum integrated composite sandwich panel and a preparation method thereof. The sandwich panel can be used for collision, impact or explosion energy absorption protection. Background technique [0002] Foam aluminum sandwich panel is also called foam aluminum sandwich panel and foam aluminum sandwich panel. The traditional method is to connect the foam aluminum core material and the skin panel in a certain way to form a composite structure. The aluminum foam sandwich panel has the characteristics of light weight, high specific stiffness, high specific strength, and high energy absorption efficiency. It is a good protective material against collisions, impacts, and explosions. At the same time, the foamed aluminum sandwich panel has the properties of energy absorption, sound absorption, electromagnetic shielding, etc., and realizes the multifunctionality of structural materials, and has broad application prospe...

Claims

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Application Information

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IPC IPC(8): B32B15/092B32B15/095B32B15/06B29C39/18B29C39/20
Inventor 辛亚军李慧剑程树良
Owner YANSHAN UNIV
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