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Composite additive for electromagnetic wave protection and preparation method thereof

A composite additive, electromagnetic wave technology, applied in the field of materials, can solve the problem of inability to meet the requirements of electromagnetic wave radiation protection, and achieve the effect of good broadband wave absorption performance, good innovation and high technology content.

Active Publication Date: 2018-05-18
FUJIAN JIANGXIA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A single material cannot meet the requirements of electromagnetic radiation protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] 1. Activation of halloysite nanotubes:

[0065] 1) After the halloysite nanotubes are mechanically crushed, pass through a 300-mesh sieve for later use;

[0066] 2) Put 48 stainless steel balls with a diameter of 5 mm and 42 stainless steel balls with a diameter of 10 mm in two identical 6 L nylon ball mill jars, and then add the halloysite nanotubes treated in step 1) respectively 2.4 kg of each powder, and then dropwise added 300 mL of absolute ethanol, and sealed with a nylon cap;

[0067] 3) Put two nylon ball mill jars symmetrically into the planetary ball mill, mill for 48 hours at a speed of 300 rpm and automatically switch the direction of rotation every 60 minutes, and obtain short-cut halloysite with a length of 170-200 nm nanotube;

[0068] 4) Add the obtained chopped halloysite nanotubes into Tween 40 aqueous solution with a pH of 8 and a mass concentration of 12% and sonicate for 20 h, filter, wash with water, and vacuum-dry at 65°C for 24 h to obtain the...

Embodiment 2

[0104] Activation and Loading BaFe of Halloysite Nanotubes 12 o 19 The preparation of halloysite nanotubes, halloysite nanotubes loaded with nano-copper, dielectric loss nanocomposites, and iron-doped zinc oxide nanomaterials is the same as in Example 1.

[0105] Preparation of composite additive for electromagnetic wave protection:

[0106] 1) will load BaFe 12 o 19 1.6 parts by weight of halloysite nanotubes and 0.5 parts by weight of methacryloxypropyltrimethoxysilane were stirred at room temperature for 2 h, then 12 parts by weight of polypropylene were added, and after stirring for 3 h, a magnetic loss-containing type was formed. Mixture of nano-additives;

[0107] 2) At room temperature, add 0.3 parts by weight of 3-(2,3-glycidoxy)propyltrimethoxysilane dropwise to 1.2 parts by weight of dielectric loss nanocomposites, stir for 1 h and then add 13 parts by weight 2 parts by weight of polypropylene and stirred for 2 h; then 2 parts by weight of iron-doped zinc oxide ...

Embodiment 3

[0112] Activation and Loading BaFe of Halloysite Nanotubes 12 o 19 The preparation of halloysite nanotubes, halloysite nanotubes loaded with nano-copper, dielectric loss nanocomposites, and iron-doped zinc oxide nanomaterials is the same as in Example 1.

[0113] Preparation of composite additive for electromagnetic wave protection:

[0114] 1) will load BaFe 12 o 19 After stirring 1.2 parts by weight of halloysite nanotubes and 0.3 parts by weight of methacryloxypropyltrimethoxysilane at room temperature for 2 h, add 10 parts by weight of polypropylene and stir for 3 h to form a magnetic loss type Mixture of nano-additives;

[0115] 2) At room temperature, add 0.3 parts by weight of 3-(2,3-glycidoxy)propyltrimethoxysilane dropwise to 0.8 parts by weight of dielectric loss nanocomposite, stir for 1 h and then add 10 parts by weight 1 part of polypropylene and stirred for 2 h; then 1.5 parts by weight of iron-doped zinc oxide nanomaterials were added, and 0.2 parts by weig...

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Abstract

The invention discloses a composite additive for electromagnetic wave protection, and a preparation method thereof. Raw materials used in the composite additive comprise, by weight, 1.2-1.6 parts of BaFe12O19-supported endellite nanotubes, 0.3-0.5 parts of trimethoxysilylpropyl methacrylate, 0.8-1.2 parts of a dielectric loss composite nano-material, 1.5-2 parts of an iron-doped zinc oxide nano-material, 20-25 parts of polypropylene and 0.5-0.8 parts of 3-(2,3-epoxypropoxy)propyltrimethoxysilane. The composite additive for electromagnetic wave protection, prepared through combining special nano-particles with different electromagnetic performances, can effectively improve the loss absorption performance of concrete and various other building materials to electromagnetic waves, and realizes electromagnetic wave protection of various critical buildings.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a composite additive for electromagnetic wave protection and a preparation method thereof. Background technique [0002] Nowadays, electromagnetic wave radiation from high-power wireless communication transmitters and microwave base stations is becoming more and more serious. Building materials with electromagnetic wave absorption function can effectively attenuate electromagnetic waves inside and outside the building. For example, a light-weight and high-toughness absorbing concrete prepared by patent ZL 201010266982.0 has a bandwidth of 10 GHz with a reflectivity less than -7 dB in the frequency range of 8 to 18 GHz. An ideal electromagnetic radiation protection material needs to have the characteristics of adjustable electromagnetic parameters, large electromagnetic loss and light specific gravity. A single material cannot meet the requirements of electromagnet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K13/06C08K9/12C08K3/22C08K9/08C08K9/06C08K9/04C08K3/08C08K7/00C08K3/34
CPCC08K3/08C08K3/22C08K3/346C08K7/00C08K9/04C08K9/06C08K9/08C08K9/12C08K13/06C08K2003/085C08K2003/2227C08K2003/2241C08K2003/2265C08K2003/2296C08K2201/003C08K2201/011C08L2201/08C08L23/12
Inventor 肖三霞
Owner FUJIAN JIANGXIA UNIV
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