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Graphene-reinforced PMI foam-pyramid sandwich panel composite structure and preparation method thereof

A technology of composite structures and pyramids, applied in the direction of metal layered products, chemical instruments and methods, layered products, etc., can solve the problems of foam strength and stiffness reduction, etc., and achieve the improvement of mechanical properties, increase of tensile strength, and high specific strength Effect

Inactive Publication Date: 2018-10-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth noting that the strength and stiffness of PMI foams decrease significantly as the foam density decreases

Method used

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  • Graphene-reinforced PMI foam-pyramid sandwich panel composite structure and preparation method thereof
  • Graphene-reinforced PMI foam-pyramid sandwich panel composite structure and preparation method thereof

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preparation example Construction

[0032] A kind of graphene reinforced PMI foam-pyramid sandwich plate composite structure of the present invention and preparation method thereof, first prepare pyramid lattice core 2, pyramid lattice core 2 and panel 1 are welded into pyramid lattice sandwich plate; Utilize graphite Alkene is used as a reinforcing material, and methacrylonitrile and methacrylic acid are used as comonomers, and initiators, crosslinking agents, foaming agents, and nucleating agents are added to prepare foamable polymers; the foamable polymers are filled into The pores of the pyramid lattice sandwich plate are freely foamed and heat-treated in an oven to prepare graphene-enhanced PMI foam that is completely filled in the pores of the pyramid lattice sandwich plate, and then naturally cooled to room temperature to obtain graphene-enhanced PMI foam-pyramid lattice Sandwich panel composite structure. Specific steps are as follows:

[0033] S1. Form the pyramidal lattice core 2 by molding or folding...

Embodiment 1

[0046] (1) The punched 316 stainless steel rhombic mesh is formed into a pyramid lattice core 2 by molding technology, and then the 316 stainless steel panel 1 and the pyramid lattice core 2 are cleaned with a metal cleaning agent to remove oil and rust. The panel 1 is connected with the pyramid lattice core body 2 to form a pyramid lattice sandwich panel;

[0047] (2) Mix 40 methacrylonitrile, 40 methacrylic acid, 0.1 azobisisobutyronitrile, 0.5 acrylamide, 2.0 propylene glycol, and 0.5 urea according to the ratio of parts by weight. / min mixer speed and mix for 1h to stir the reaction solution evenly;

[0048] (3) Graphene with a weight and number ratio of 2 is added in the reaction solution, the mixed solution is placed in an ultrasonic disperser at a frequency of 5 kHz, ultrasonically dispersed for 20 min, and now the graphene can be uniformly dispersed in the reaction solution;

[0049] (4) Pour the reaction solution into a glass mold, then put it into a water bath, and ...

Embodiment 2

[0053] (1) The flattened TC4 titanium alloy expanded mesh is folded to form a pyramid lattice core 2, and then the TC4 titanium alloy panel 1 and the pyramid lattice core 2 are cleaned with a metal cleaning agent to remove oil and rust. Welding connects the panel 1 and the pyramid lattice core body 2 to make a pyramid lattice sandwich panel;

[0054] (2) Mix 50 methacrylonitrile, 50 methacrylic acid, 0.2 azobisisobutyronitrile, 0.6 methacrylamide, 2.0 formamide and 1.0 methyl urea according to the ratio of parts by weight. Under the temperature, the reaction solution is stirred evenly by mixing at a speed of 2000r / min for 2 hours;

[0055] (3) the graphene that is 10 is added in the reaction solution by weight part ratio, the mixed solution is placed in the ultrasonic disperser under 30kHz frequency, ultrasonic dispersion 30min, now graphene can be evenly dispersed in the reaction solution;

[0056] (4) Pour the reaction solution into a glass mold, then put it into a water ba...

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Abstract

The invention discloses a graphene-reinforced PMI foam-pyramid sandwich panel composite structure and a preparation method thereof. The graphene-reinforced PMI foam-pyramid sandwich panel composite structure comprises panels and a pyramid lattice core body. The pyramid lattice core body is arranged between the two panels so that a pyramid lattice sandwich plate is formed. Graphene-reinforced PMI foam interstitially fills the pores of the pyramid lattice core body and reinforcing phase graphene is added to the graphene-reinforced PMI foam. The preparation method has a low cost, is easy to industrialize, and has wide application prospects in the fields of safety protection, transportation, machinery manufacturing, aerospace and the like.

Description

technical field [0001] The invention belongs to the technical field of ultra-light porous metal materials, and in particular relates to a graphene-reinforced PMI foam-pyramid sandwich plate composite structure and a preparation method thereof. Background technique [0002] Ultralight porous metal materials are a new type of multifunctional materials that have emerged with the rapid development of material preparation and machining technology in recent years, and have the characteristics of structural and functional integration. Its core has high porosity, and its microstructure can be divided into disordered and ordered according to the degree of regularity. The former includes closed-cell aluminum foam materials, while the latter includes two-dimensional lattice materials (such as corrugated structures) and three-dimensional trusses. Structure (such as pyramid structure, tetrahedron structure). [0003] As a new type of two-dimensional nanomaterial, graphene has many excel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B15/18B32B15/20B32B1/06B32B3/08C08F220/50C08F220/06C08F220/56C08F2/44C08K3/04C08J9/00
CPCB32B5/18B32B3/08B32B15/046B32B15/18B32B15/20B32B2266/04C08F2/44C08F220/06C08F220/50C08J9/00C08J2333/02C08J2333/18C08K3/04C08F220/56
Inventor 张钱城王昕赵振宇卢天健钟俊泱金峰
Owner XI AN JIAOTONG UNIV
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