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 t

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

Examples

Experimental program
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Example Embodiment

[0022] Example 1

[0023] A composite coating used to protect medium and high frequency electromagnetic wave radiation. 100g composite coating consists of 5g micro-nano mussel shell powder, 8g graphene, 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 shells and air-drying, crushing to 10nm~100nm, and calcining at 580℃ 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 as 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 debris are reduced, and the pores are more unobstructed. Magnetic Fe 4 O 3 Prepared by the following process: 11.92gFeCl 3 ·6H 2 O and 3.66gFeSO 4 ·7H 2 O was diss...

Example Embodiment

[0025] Example 2

[0026] A composite coating used to protect medium and high frequency electromagnetic wave radiation. 100g of composite coating consists of 10g micro-nano mussel shell powder, 10g graphene, and magnetic Fe 4 O 3 12g, 3.5g curing agent, 3g defoamer, 7g water and 54.5g solvent; curing agent is dodecyl alcohol ester; defoaming agent is higher alcohol fatty acid ester compound; solvent is polyurethane. Micro-nano mussel shell powder is prepared by cleaning the mussel shells, air-drying, crushing to 10nm~100nm, and calcining at 600℃ for 4 hours; magnetic Fe 4 O 3 Prepared by the following process: 11.92gFeCl 3 ·6H 2 O and 3.66gFeSO 4 ·7H 2 O was dissolved in 50mL of distilled water, stirred for 30min under nitrogen atmosphere, then heated to 60℃, and then added 7.7mL of 25% NH 3 ·H 2 O reacts for 75min, then add 2.5mL oleic acid, heat up to 70℃ and mature for 75min to obtain 5-10nm magnetic Fe 3 O 4 , And then washed with absolute ethanol 4 times.

[0027] The preparati...

Example Embodiment

[0028] Example 3

[0029] A composite coating used to protect medium and high frequency electromagnetic wave radiation. The difference from Example 2 is that 100g of composite coating is made of 17g micro-nano mussel shell powder, 13g graphene, magnetic Fe 4 O 3 It is composed of 15g, 4g curing agent, 4g defoamer, 11g water and 35g solvent.

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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

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Claims

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Application Information

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Owner ZHEJIANG OCEAN UNIV
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