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Self-repairing super-hydrophobic composite material, preparation method and application thereof

A composite material and super-hydrophobic technology, applied in the field of super-hydrophobic composite materials, can solve the problems of no self-repair, local sharp convex structures are easily damaged, and it is difficult to maintain mechanical stability.

Active Publication Date: 2016-09-21
SHANGHAI MARITIME UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0003] Although superhydrophobic materials have shown excellent properties and great application prospects in the field of antifouling, they have been greatly restricted in practical applications. The main reason is that the conventional micro-nano hierarchical rough surface construction method (such as , chemical etching, plasma treatment, vapor deposition and electrochemical deposition, etc.), are too complicated and the process requirements are too high, which is not conducive to large-scale production; secondly, due to the rough structure of these modified superhydrophobic surfaces in practical applications , most of them have no self-healing function when they are worn or damaged. When the micro-nano hierarchical structure with rough surface is rubbed, its local sharp convex structure is easily damaged, resulting in the disappearance of the micro-nano hierarchical structure and it is difficult to maintain good mechanical stability. ; Moreover, if in a relatively static marine environment, relying solely on the superhydrophobic properties of the coating is not enough to completely inhibit the purpose of biological adhesion, it is necessary to cooperate with other technologies

Method used

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  • Self-repairing super-hydrophobic composite material, preparation method and application thereof

Examples

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Embodiment 1

[0033] 1. Preparation of Nanosilver

[0034] Dissolve 45 mg of hydrolyzed casein and 10 mg of sodium hydroxide in 45 mL of deionized water, then drop into 5 mL of silver nitrate (20 mM) solution. The above mixed solution was heated with magnetic stirring at 60 °C for 3 h, mixed with alcohol 1:4 and centrifuged at 20000 × g at high speed, and finally the precipitate was washed with deionized water and dried in vacuum to obtain silver nanoparticles (Ag NPs) particles.

[0035] 2. Preparation of nanoscale hollow mesoporous silica (HMS)

[0036] First, in 1 L of deionized water, add 5 g of purchased nanoscale (200 nm–500 nm) spherical monodisperse solid SiO 2 Microspheres, and ultrasonically dispersed to form white SiO 2 Emulsion; then mix CTAB, ethanol and deionized water in a volume ratio of 5:1:1, and adjust the pH value of the solution to 8.0~8.5 with ammonia water; mix the solution with the above SiO 2 The emulsion is mixed according to the volume ratio of 10:1. After unifor...

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Abstract

The invention discloses a self-repairing super-hydrophobic composite material, a preparation method and application thereof. The composite material has a structural general formula of: APA / M-PD / APA@HMS, wherein, APA is alkyl primary amine having a long carbon chain with C greater than or equal to 12, PD is polydopamine, HMS is hollow mesoporous SiO2 microsphere, APA@HMS refers to HMS loaded with APA, and the M refers to an antifouling able to stick on PD. The preparation method provided by the invention has the advantages of simple operation, and rich raw material sources, and is suitable for mass production. The prepared APA / M-PD / APA@HMS can be used as a paint additive, can endow a coating with super-hydrophobicity, antifouling property, self-repairability, and durability, and can be used for protective coatings of marine materials.

Description

technical field [0001] The invention relates to a superhydrophobic composite material, in particular to a self-repairing superhydrophobic composite material, its preparation method and application. Background technique [0002] The adhesion and corrosion of marine organisms to sea-related materials has become a global problem that seriously affects the service performance of marine facilities. As an anti-fouling concept that has emerged in recent years, super-hydrophobic biomimetic coatings are the most active type in the research field of new environment-friendly anti-fouling coatings. Antifouling coatings can greatly expand its application fields, and its development prospects are very broad. This type of coating is usually made by simulating the surface of animals and plants such as lotus leaves and shark skin, using hydrophobic materials to construct surface micro-nano rough structures or modifying low surface energy substances on the surface of rough porous materials t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/16C09D7/12C09D163/00
CPCC08K3/08C08K3/36C08K5/17C08K9/10C08K9/12C08K2003/0806C08K2201/011C09D5/1606C09D5/1618C09D7/62C09D7/63C09D163/00
Inventor 董耀华董丽华谭微刘涛
Owner SHANGHAI MARITIME UNIVERSITY
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