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Composite nanomaterials, their preparation methods and applications

A technology of composite nanomaterials and coatings, applied in the field of its preparation and composite nanomaterials, can solve the problems of marine environmental pollution, economic loss, easy enrichment of antifouling agents, etc., and achieve broad application prospects, spectral antifouling activity, antifouling outstanding performance

Active Publication Date: 2021-01-15
深思来福(深圳)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main hazards of marine biofouling include: (1) increasing the roughness of the bottom of the ship, causing an increase in the resistance of the ship's navigation, increasing energy consumption and emissions, and bringing great harm to the ship's navigation
(2) Accelerate the fouling and corrosion of structural parts such as marine facilities and buildings, and significantly shorten their lifespan
(3) Clogging of the meshes and pipes of the breeding net cages and fixed fishing nets
(4) Damage to marine instruments, resulting in failure of the instrument transmission mechanism, signal distortion, performance degradation, and even safety hazards, resulting in huge economic losses
With the highly toxic and teratogenic antifouling agent organotin compounds being banned by the International Maritime Organization (IMO), other antifouling agents such as cuprous oxide and isothiazolones have been widely used. However, these antifouling agents have been found to be There are disadvantages such as easy enrichment, refractory degradation and high toxicity, which cause pollution to the marine environment.

Method used

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  • Composite nanomaterials, their preparation methods and applications
  • Composite nanomaterials, their preparation methods and applications
  • Composite nanomaterials, their preparation methods and applications

Examples

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preparation example Construction

[0019] The preparation method of the composite nanomaterial of the specific embodiment of the present invention comprises: S1, precursor MnO@CoO@TiO 2 preparation; S2, doping with transition elements to obtain a composite nanomaterial intermediate doped with transition metal elements; S3, doping with rare earth elements. The order of steps S2 and S3 is not particularly limited, and the transition element doping may be performed first, followed by the rare earth element doping, or the transition element and the rare earth element may be doped together.

[0020] Specifically, the precursor MnO@CoO@TiO 2 The preparation includes: weighing manganese salt and cobalt salt in proportion, preparing solution A, the concentration of manganese salt in solution A is 0.05mol / L~1.0mol / L, and the concentration of cobalt salt is 0.05mol / L~1.0mol / L , the manganese salt can be manganese nitrate, manganese dichloride, etc.; the cobalt salt can be cobalt nitrate or cobalt dichloride, etc.; under...

Embodiment 1

[0028] The preparative reaction was carried out on the basis of the molar ratio n(Mn):n(Co):n(Ti)=1:1:1. First, take manganese nitrate and cobalt nitrate in proportion to prepare solution A, in which Mn(NO 3 ) 2 The concentration is 0.05mol / L, Co(NO 3 ) 2 The concentration is 0.05mol / L; then, under stirring, titanium tetrachloride and NaOH solution with a concentration of 0.05mol / L are slowly dropped into liquid A, and the stirring reaction is continued for 2 hours to obtain a uniform transparent sol, filter the precipitate, and use Wash 3 times with deionized water; finally, dry the obtained precipitate in a vacuum drying oven at 60°C, then place it in a crucible, calcinate at 600°C for 4 hours in a reducing atmosphere, and cool naturally to room temperature to obtain the precursor MnO@CoO@TiO 2 .

Embodiment 2

[0030] The preparation reaction was carried out on the basis of the molar ratio n(Mn):n(Co):n(Ti)=15:9:100. First, take manganese nitrate and cobalt nitrate in proportion to prepare solution A, in which Mn(NO 3 ) 2 The concentration is 1mol / L, Co(NO 3 ) 2 The concentration is 1 mol / L; then, under stirring, slowly drop titanium tetrachloride and NaOH solution with a concentration of 2 mol / L into liquid A, and continue stirring for 6 hours to obtain a uniform transparent sol, filter the precipitate, and use deionized Washed with water for 3 times; finally, the obtained precipitate was dried in a vacuum drying oven at 100°C, then placed in a crucible, calcined at 1000°C for 12 hours in a reducing atmosphere, and cooled naturally to room temperature to obtain the precursor MnO@ CoO@TiO 2 .

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Abstract

The invention relates to the technical field of marine antifouling coatings and specifically discloses a composite nanomaterial. The composite nanomaterial disclosed by the invention is composed of MnO, CoO and TiO2 which are in the molar ratio of (1-15):(1-15):(1-100); the composite nanomaterial is prepared by doping transition metal elements with rare earth elements; and measured by 100% of thecomposite nanomaterial, the mass percentage of the doped transition metal elements is 0.1%-5%, and the mass percentage of the rare earth elements is 0.1%-3%. The composite nanomaterial disclosed by the invention has a remarkable attachment inhibiting effect for marine microorganisms, seaweeds serving as marine soft fouling organisms and mussels serving as marine large fouling organisms at low concentration and shows efficient and broad-spectrum antifouling activity; and the preparation process is simple and strong in operability, and meanwhile, the composite nanomaterial is remarkable in antifouling property and wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of marine antifouling coatings, in particular to a composite nanomaterial, its preparation method and application. Background technique [0002] With the deepening of human development and utilization of marine resources, the harm caused by marine biofouling has attracted great attention and widespread attention from all over the world. The marine environment is a highly corrosive and biofouling environment. Marine biofouling refers to the phenomenon that microorganisms, plant organisms, animal organisms and other marine organisms in the ocean adhere to the surface of the hull or marine structures and damage them. According to statistics, the direct economic loss caused by marine biofouling is as high as 30-50 billion US dollars every year in the world. The main hazards of marine biofouling include: (1) increasing the roughness of the bottom of the ship, causing an increase in ship navigation resistance, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/16C09D5/14
CPCC08K2003/2241C08K2003/2262C08K2003/2289C08K2201/011C09D5/14C09D5/1618
Inventor 梁岩
Owner 深思来福(深圳)科技有限公司
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