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Composite coating for protecting medium-high-frequency electromagnetic radiation and preparation method of composite coating

A composite coating and electromagnetic wave technology, applied in coatings and other directions, can solve problems such as waste, achieve the effects of improving radiation resistance, increasing resource value, and enriching pores

Active Publication Date: 2018-06-22
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In response to the above problems, the object of the present invention is to provide a composite coating for protecting medium and high frequency electromagnetic radiation, using micro-nano mussel shell powder as a functional carrier, utilizing the micropores and layered structure of the micro-nano mussel shell powder to prepare electromagnetic short-wave The composite coating has a good protective effect on electromagnetic and short-wave radiation, and can make full use of the mussel shell resources of exhaust gas, improve the economic value of mussel shells, and solve the environmental problems caused by the waste of mussel shell resources

Method used

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  • Composite coating for protecting medium-high-frequency electromagnetic radiation and preparation method of composite coating
  • Composite coating for protecting medium-high-frequency electromagnetic radiation and preparation method of composite coating
  • Composite coating for protecting medium-high-frequency electromagnetic radiation and preparation method of composite coating

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Embodiment 1

[0023] A kind of composite coating that is used for protecting medium and high frequency electromagnetic wave radiation, the composite coating of 100g is made of micronano mussel shell powder 5g, graphene 8g, magnetic Fe 4 o 3 10g, curing agent 3g, defoaming agent 2g, water 5g and solvent 67g; curing agent is 2-methylimidazole; defoaming agent is emulsified silicone oil; solvent is polyurethane. The micro-nano mussel shell powder is prepared by cleaning the mussel shell, air-drying, crushing to 10nm-100nm, and then calcining at 580°C for 5 hours. The SEM image of the activated micro-nano mussel shell powder is as follows figure 2 As shown, the SEM image before activation is shown in figure 2 As shown, it can be seen that the pores of the activated micro-nano mussel shell powder are more regular and orderly, and the impurities and detrital substances are reduced, and the pores are more smooth. Magnetic Fe 4 o 3 Prepared by the following process: 11.92gFeCl 3 ·6H 2 O and...

Embodiment 2

[0026] A kind of composite coating that is used for protecting medium and high frequency electromagnetic wave radiation, the composite coating of 100g is made of micronano mussel shell powder 10g, graphene 10g, magnetic Fe 4 o 3 12g, curing agent 3.5g, defoaming agent 3g, water 7g and solvent 54.5g; curing agent is dodecyl alcohol fat; defoaming agent is high carbon alcohol fatty acid ester compound; solvent is polyurethane. Micro-nano mussel shell powder is prepared by cleaning mussel shells, air-drying, crushing to 10nm-100nm, and then calcining at 600°C for 4 hours; magnetic Fe 4 o 3 Prepared by the following process: 11.92gFeCl 3 ·6H 2 O and 3.66g FeSO 4 ·7H 2 O was dissolved in 50 mL of distilled water, stirred for 30 min under a nitrogen atmosphere, then heated to 60 °C, and then 7.7 mL of 25% NH 3 ·H 2 O reacted for 75min, then added 2.5mL oleic acid, heated to 70°C and matured for 75min to obtain 5-10nm magnetic Fe 3 o 4 , and then washed 4 times with absolute...

Embodiment 3

[0029] A kind of composite coating that is used to protect middle and high frequency electromagnetic wave radiation, the difference with embodiment 2 is that the composite coating of 100g is made of micronano mussel shell powder 17g, graphene 13g, magnetic Fe 4 o 3 15g, curing agent 4g, defoamer 4g, water 11g and solvent 35g.

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Abstract

The invention relates to the technical field of electromagnetic protection and specifically relates to a composite coating for protecting medium-high-frequency electromagnetic radiation. The compositecoating is composed of one or more of micro-nano mussel shell powder, graphene, nano-metal or metal oxide as well as a curing agent, a defoaming agent, water and a solvent, wherein the metal is Fe orAl, and the metal oxide is Al2O3 or magnetic Fe4O3. During preparation, water is added into the solvent and is stirred to obtain a first-stage feed liquid; then, one or more of the micro-nano musselshell powder, graphene, the nano-metal or the metal oxide are added and stirred to obtain a second-stage feed liquid; and the curing agent and the defoaming agent are added into the second-stage feedliquid and are stirred to obtain the composite coating. The effectiveness of shielding medium-high-frequency electromagnetic waves within the range of 300kHz-1.5GHz can reach 35.632-47.777dB; in addition, waste oceanic mussel shells are used as raw materials, so that the resource values of the mussel shells are increased, and the composite coating is of great importance in guaranteeing the ecological construction of the Zhoushan environment and promoting the sustainable development of marine industry.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave protection, in particular to a composite coating for protecting medium and high frequency electromagnetic wave radiation and a preparation method thereof. Background technique [0002] In the 21st century, with the rapid development of modern science and technology, people's living standards have been significantly improved, and various household appliances such as televisions, computers, refrigerators, washing machines and microwave ovens have become an indispensable part of daily life. Modern electronic systems such as radio technology, high-voltage power lines, generators, etc. are also widely used in residential life and industrial production, resulting in people's inevitable exposure to electromagnetic fields. Environmental scientists have predicted that according to the average annual growth rate of space electromagnetic energy of 7% to 14%, the environmental electromagnetic ene...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/61C09D7/62C09D7/63C09D7/65C09D7/20
CPCC09D1/00
Inventor 王亚宁宋文东纪丽丽郭健蔡璐应知伟
Owner ZHEJIANG OCEAN UNIV
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