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Super-hydrophobic coating with self-cleaning and antibacterial functions and preparation method thereof

A super-hydrophobic coating, self-cleaning technology, applied in coatings, antifouling/underwater coatings, biocide-containing paints, etc., can solve problems such as ignoring antibacterial properties, organic matter and microbial contamination, and achieve thermal stability and Good chemical stability, low production cost, and the effect of preventing the formation of biofilm

Active Publication Date: 2018-03-30
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Superhydrophobic surfaces can prevent the adhesion of liquid and solid particles, but are easily contaminated by organic matter and microorganisms in water
Much research has focused on the self-cleaning properties of these surfaces while neglecting antimicrobial studies

Method used

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  • Super-hydrophobic coating with self-cleaning and antibacterial functions and preparation method thereof
  • Super-hydrophobic coating with self-cleaning and antibacterial functions and preparation method thereof
  • Super-hydrophobic coating with self-cleaning and antibacterial functions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]A superhydrophobic coating with self-cleaning and antibacterial functions, the preparation method is as follows:

[0038] 1) Synthesize ZIF-8 nanoparticles in aqueous solution using triethylamine as a guide agent: get 0.733g of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100mL of deionized water, and then 3.244g of 2-methylimidazole (Hmim) and 4g of triethylamine (TEA) were dissolved in another 100mL of deionized water. At room temperature, zinc nitrate aqueous solution was added rapidly Stirring was continued for 10 min in the stirred Hmim and TEA solution. Then the precipitate was collected by centrifugation at 8000rpm for 10min and washed with deionized water, which was repeated three times. The obtained ZIF-8 nanoparticles were vacuum-dried at 40°C for 24 h, and then ground for use.

[0039] 2) Preparation of superhydrophobic coating solution: First, 3 g of PVDF was added to 97 g of N,N-dimethylacetamide and stirred for 2 h to form a transparent solution of PVDF. Secon...

Embodiment 2

[0050] A superhydrophobic coating with self-cleaning and antibacterial functions, the preparation method is as follows:

[0051] 1) in aqueous solution, use triethylamine as guide agent to synthesize ZIF-8 nanoparticles: same as Example 1;

[0052] 2) Preparation of superhydrophobic coating solution: First, 3 g of PVDF was added to 97 g of N,N-dimethylformamide and stirred for 2 h to form a transparent solution of PVDF. Second, 10 g of PVDF solution was mixed with 90 g of ethanol, stirred vigorously for 20 min, and then the mixture was sonicated for 30 min to obtain a solid suspension of PVDF. Disperse 0.5g of ZIF-8 nanoparticles in the above system and sonicate for 10min. Finally, add 1.0g of tridecafluorooctyltriethoxysilane to the above mixture, and stir magnetically for 12h to obtain a superhydrophobic coating solution;

[0053] 3) Preparation of superhydrophobic coating: PAN film is used as the substrate (the same below), and the others are the same as in Example 1.

[...

Embodiment 3

[0056] A superhydrophobic coating with self-cleaning and antibacterial functions, the preparation method is as follows:

[0057] 1) Synthesis of ZIF-8 nanoparticles in an aqueous solution using triethylamine as a guide agent: the obtained ZIF-8 nanoparticles were vacuum-dried at 50° C. for 24 hours, and then ground for later use. Others were the same as in Example 1.

[0058] 2) Preparation of superhydrophobic coating solution: First, 3 g of PVDF was added to 97 g of N-methylpyrrolidone and stirred for 2 h to form a transparent solution of PVDF. Second, 10 g of PVDF solution was mixed with 90 g of ethanol, vigorously stirred for 30 min, and then the mixture was sonicated for 30 min to obtain a solid suspension of PVDF. Disperse 0.5g of ZIF-8 nanoparticles in the above system and sonicate for 10min. Finally, add 1.0g of tridecafluorooctyltriethoxysilane to the above mixture, and stir magnetically for 12h to obtain a superhydrophobic coating solution;

[0059] 3) Preparation of...

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Abstract

The invention belongs to the technical field of preparation of super-hydrophobic coatings, and particularly relates to a super-hydrophobic coating with self-cleaning and antibacterial functions and apreparation method thereof. The preparation method comprises the steps of: preparing PVDF solid suspension A by adopting an organic solution of polyvinylidene fluoride and small-molecular-weight alcohol, then adding ZIF nanoparticles into the suspension A, then adding fluoride with low surface energy to obtain a super-hydrophobic coating solution, and painting a substrate with the super-hydrophobic coating solution so as to obtain the super-hydrophobic coating with the self-cleaning and antibacterial functions. The super-hydrophobic coating with the self-cleaning and antibacterial functions isprovided, has the advantages of a simple preparation process, mild reaction conditions and good thermal stability and chemical stability, and is applicable to a plurality of different substrates andlarge-scale production, and not only can a function of surface contaminants self cleaning be achieved through the super-hydrophobic coating, but also bacteria on the surface of the coating can be killed at the same time, so that the formation of biofilm is prevented, and the super-hydrophobic coating has great potential application values in the self-cleaning and antibacterial fields.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic coating preparation, and in particular relates to a superhydrophobic coating with self-cleaning and antibacterial functions and a preparation method thereof. Background technique [0002] The study of biomimetic superhydrophobic surfaces is a new field in the study of chemically simulated biological systems. In nature, it is very common for animals and plants to achieve self-cleaning functions by forming superhydrophobic surfaces, such as lotus leaves, bird feathers, water strider legs, and butterfly wings. The most typical example is the surface of the lotus leaf, which is not stained by mud, and has a strong self-cleaning ability, which is called the lotus effect. The surface of the lotus leaf is composed of many papillae, and the average diameter of the papillae is 5-9 μm. The contact angle and rolling angle of water on this surface are 161.0±2.7° and 2°, respectively. Each papillae...

Claims

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Application Information

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IPC IPC(8): C09D127/16C09D7/63C09D5/14
CPCC08K5/5419C08K7/26C08K2201/011C09D5/14C09D127/16
Inventor 张亚涛刘金盾缪伟振张翔
Owner ZHENGZHOU UNIV
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