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High-hydrophobicity antibacterial adhesion surface taking dopamine as anchor molecule and preparation method thereof

A technology with anti-bacterial adhesion and high hydrophobicity, which can be applied to devices for coating liquid on the surface, paints containing biocides, antifouling/underwater coatings, etc., and can solve complex modification methods and limited modification substrates, etc. problem, to achieve the effect of convenient operation, simple implementation process conditions and simple operation

Active Publication Date: 2017-12-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Compared with the existing hydrophobic anti-bacterial adhesion surface preparation technology, the present invention uses a simple dip coating method, combined with the super-adhesive properties of dopamine and its derivatives, to solve the problem of limited modification of substrates and complicated modification methods. The problem

Method used

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  • High-hydrophobicity antibacterial adhesion surface taking dopamine as anchor molecule and preparation method thereof
  • High-hydrophobicity antibacterial adhesion surface taking dopamine as anchor molecule and preparation method thereof
  • High-hydrophobicity antibacterial adhesion surface taking dopamine as anchor molecule and preparation method thereof

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Embodiment 1

[0034] (1) Hydrophobically modified SiO 2 Preparation of nanoparticles: First, the SiO 2 The nanoparticles were dissolved in ethanol with a mass fraction of 0.5%, and mixed uniformly under slow stirring for later use; nitrogen-(3,4-hydroxyphenylethyl)methacrylamide (DMA) was mixed with a mass fraction of The proportion of % is dissolved in Tris-HCl buffer solution, after mixing evenly, slowly add to the above SiO 2 In the dispersion liquid, after the dropwise addition is completed, react at room temperature for 8 hours. The reaction mixture was centrifuged to obtain SiO 2 @DMA nanoparticles; then, SiO with a mass ratio of 1:5 2 @DMA nanoparticles and n-dodecanethiol (NDM) are dissolved in ethanol, and add 0.1% azobisisobutyronitrile and 0.01% triethylamine accounting for the total mass of the reactants, at 60°C The reaction was carried out for 4 hours. After the reaction, centrifuge the reaction mixture to obtain hydrophobically modified SiO 2 Nanoparticle SiO 2 @DMA @N...

Embodiment 2

[0044] (1) Hydrophobically modified SiO 2 Preparation of nanoparticles: First, the SiO 2 The nanoparticles were dissolved in methanol at a mass fraction of 1%, and mixed uniformly for later use under slow stirring; The ratio of % is dissolved in NaOH solution, after mixing evenly, slowly add dropwise to the above SiO 2 In the dispersion liquid, after the dropwise addition is completed, react at room temperature for 8 to 24 hours. The reaction mixture was centrifuged to obtain SiO2@DMA nanoparticles; then, SiO with a mass ratio of 1:10 2 @DMA nanoparticles and n-tetradecanethiol were dissolved in methanol, and 0.5% ammonium persulfate and 0.05% triethylamine were added to the total mass of the reactants, and reacted at 40°C for 8 hours. After the reaction, centrifuge the reaction mixture to obtain hydrophobically modified SiO 2 Nanoparticles. The hydrophobically modified SiO that this embodiment makes 2 The infrared spectra and particle size distribution curves of nanopar...

Embodiment 3

[0048] (1) Hydrophobically modified SiO 2 Preparation of nanoparticles: First, the SiO 2 The nanoparticles were dissolved in isopropanol at a mass fraction of 2.5%, and mixed uniformly for later use under slow stirring; nitrogen-(3,4-hydroxyphenylethyl)methacrylamide (DMA) was Dissolved in NaCO at a ratio of 3.5% 3 solution, after mixing evenly, slowly add dropwise to the above SiO 2 In the dispersion liquid, after the dropwise addition is completed, react at room temperature for 16 hours. The reaction mixture was centrifuged to obtain SiO2@DMA nanoparticles; then, SiO with a mass ratio of 1:20 2 @DMA nanoparticles and n-hexadecanthiol were dissolved in methanol, and benzoyl peroxide accounting for 0.8% of the total mass of the reactants and acetamide accounting for 0.07% of the total mass of the reactants were added, and reacted at 80°C for 16 hours . After the reaction, centrifuge the reaction mixture to obtain hydrophobically modified SiO 2 Nanoparticles. The hydroph...

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Abstract

The invention discloses a high-hydrophobicity antibacterial adhesion surface taking dopamine as anchor molecule and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing hydrophobic modified SiO2 nanometer particle by utilizing dopa derivative containing double bond and alkyl sulfhydryl modified SiO2 nanometer particle, and then modifying the dopamine and the hydrophobic modified SiO2 nanometer particle to the base material surface under an alkaline condition, thereby acquiring the high-hydrophobicity antibacterial adhesion surface taking dopamine as anchor molecule. According to the invention, an antibacterial adhesion surface material with high hydrophobicity is prepared in the manner of taking the dopamine and derivative molecule thereof with reaction activity as the anchor molecule, taking the hydrophobic SiO2 nanometer particle as an interface material and utilizing the super-strong adhesion characteristic of catechol group in the anchor molecule structure to link the substrate and the hydrophobic SiO2 nanometer particle. According to the invention, the problems of limited modification substrate and complex modifying method are solved, the implementation process and condition are simple and the operation is convenient and feasible.

Description

technical field [0001] The invention relates to an anti-bacteria adhesion surface material, in particular to a highly hydrophobic anti-bacteria adhesion surface with dopamine as an anchor molecule and a preparation method thereof. Background technique [0002] For a long time, superhydrophobic surfaces with contact angles greater than 150° have attracted extensive attention from researchers at home and abroad due to their excellent anti-adhesion and self-cleaning properties. Biological surfaces in nature, such as rice leaves, lotus leaves, legs of water striders, wings of butterflies, and feet of geckos, all have excellent superhydrophobic properties. Experimental observations and theoretical analyzes of them show that the superhydrophobic properties of these biological surfaces depend on two factors: the surface chemical composition and the multiscale micro-nano composite structure. It is an effective way to prepare superhydrophobic surfaces by modifying low surface energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/16C09D1/00B05D1/18B05D1/36
Inventor 李光吉王立莹陈志锋张子勋
Owner SOUTH CHINA UNIV OF TECH
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