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A three-dimensional shell-imitated material and a preparing method thereof

A structural material and shell imitation technology, applied in the field of materials, can solve the problems of slow preparation method and poor material tolerance, and achieve the effect of simple operation and wide application prospect

Active Publication Date: 2018-11-30
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Three-dimensional imitation shell structure materials have very important practical application value in the fields of mechanical engineering, aerospace and bulletproof armor, but the research on three-dimensional imitation shell structure materials is still in the initial stage of exploration, and still faces many challenges
Although such materials have excellent mechanical properties, the material has poor environmental resistance and the preparation method is relatively slow.

Method used

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  • A three-dimensional shell-imitated material and a preparing method thereof
  • A three-dimensional shell-imitated material and a preparing method thereof
  • A three-dimensional shell-imitated material and a preparing method thereof

Examples

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preparation example Construction

[0033] The invention provides a preparation method of a three-dimensional imitation shell structure material, comprising:

[0034] A) the aramid fiber is in a solvent, and the aramid nanofiber solution is obtained by stirring and stripping;

[0035] The mica dispersion is mixed with a surface modifier and a dispersant to obtain a suspension of mica flakes modified by the surface modifier;

[0036] B) mixing the mica sheet suspension modified by the surface modifier with the aramid fiber dissolving solution to obtain a mica-aramid nanofiber dispersion;

[0037] C) the mica-aramid nanofiber dispersion is sprayed into a composite film by spraying assembly method;

[0038] D) spraying zinc oxide nanoparticles on the composite film, impregnating epoxy resin, stacking, and hot pressing to obtain a three-dimensional imitation shell structure material.

[0039] The preparation method of the three-dimensional imitation shell structure material provided by the invention first dissolve...

Embodiment 1

[0074] Preparation of artificial shell composites:

[0075] a. Prepare 10mg / mL polyacrylic acid, 0.1mol / L sodium chloride solution, 1L, add 20mL polyacrylic acid and sodium chloride solution to the 4mg / mL mica flake suspension, stir at room temperature for 1h, centrifuge at 8000r / min for 10min, After washing for 3 times, a suspension of 2% polyacrylic acid-modified nano-mica flakes was obtained. figure 2 It is a scanning electron micrograph of a polyacrylic acid-modified mica sheet in Example 1 of the present invention.

[0076] b. Weigh 10g of potassium hydroxide and 10g of aramid fibers into a 2L beaker containing 1L of dimethyl sulfoxide, stir for one week at room temperature, and wait until the fibers are completely peeled off to obtain a 1% solution of aramid nanofibers. The scanning electron micrographs of aramid nanofibers prepared under these conditions are as follows: image 3 as shown, image 3 It is a scanning electron micrograph of the aramid nanofiber in Examp...

Embodiment 2

[0082] Preparation of pure aramid nanofiber three-dimensional bulk composites:

[0083] a. The preparation of aramid nanofiber is the same as in Example 1.

[0084] b. The preparation of pure aramid nanofiber membrane is the same as in Example 1.

[0085] c, Pure aramid nanofiber membrane as the object to prepare three-dimensional composite materials. Prepare a certain concentration of nano-zinc oxide solution, use a small spray gun to evenly spray a layer of nanoparticles on the surface of the film, after drying, use scissors to cut the film into ~2.25cm*4cm, and measure the film thickness with a spiral micrometer. Configure a certain volume of epoxy resin, use the infiltration method to coat the epoxy resin, and after the composite film is infiltrated, use the lamination method to tightly bond the films together. After the block is briefly covered with filter paper, use a tablet press. Under the action of 60°C and 30KPa for 48 hours, a pre-pressed block with a certain hard...

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Abstract

A preparing method of a three-dimensional shell-imitated material is provided. The method includes preparing a nanometer aromatic polyamide fiber dissolved solution from aromatic polyamide fibers in asolvent by utilizing stirring and stripping; mixing a mica dispersion, a surface modifier and a dispersing agent to obtain a mica sheet suspension modified with the surface modifier; mixing the micasheet suspension modified with the surface modifier with the nanometer aromatic polyamide fiber dissolved solution to obtain a mica-nanometer aromatic polyamide fiber dispersion; preparing a compositefilm by spraying the mica-nanometer aromatic polyamide fiber dispersion through a spray-assembling method; spraying the composite film with zinc oxide nanoparticles; infiltrating the composite film in epoxy resin; and performing lamination and hot press processing to obtain the three-dimensional shell-imitated material. The three-dimensional shell-imitated material has bending stress, toughness and Young modulus which are far higher than those of pure nanometer aromatic polyamide fiber block materials, and has specific stress and specific toughness which are far higher than those of shell-imitated materials of the same type. In addition, stability of properties in acidic, alkaline, high-temperature, low-temperature, radiation environments and other harsh environments is achieved.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a three-dimensional imitation shell structure material and a preparation method thereof. Background technique [0002] With the development of nanotechnology, the research and design of bionic materials have been accurate to the nanoscale. Through bionics, nanoscale structural units can be assembled and constructed into macroscopic functional materials with multi-level ordered structures, so that the unique properties of nanomaterials Fully exerted on the macro scale to meet the needs of a variety of special and extreme applications, especially the relationship between the excellent mechanical properties of shells and their highly ordered "brick-mud" microstructure for our design and preparation of lightweight, high-strength The materials provide inspiration and methods. Three-dimensional shell-like structural materials have very important practical application value in the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L77/10C08K9/04C08K3/34C08K3/22
CPCC08K2003/2296C08K2201/011C08L63/00C08L2205/16C08L77/10C08K9/08C08K3/34C08K3/22
Inventor 俞书宏潘晓锋高怀岭
Owner UNIV OF SCI & TECH OF CHINA
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