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Method for preparing bionic super-hydrophobic surface by enzymes biocatalysis

A biocatalytic and superhydrophobic technology, applied in the interdisciplinary field of disciplines, can solve the problems of complex process, application limitation and high cost, and achieve the effect of strong controllability and wide application range.

Inactive Publication Date: 2010-06-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned currently commonly used methods generally use chemical methods, the process is complex, a large amount of organic solvents are used, the environment is polluted, and the cost is relatively high.
Applications in microfluidic devices, antimicrobial coatings, biomolecular diagnostics and detection, biosensors, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Preparation of metal nanoparticles: In a 100mL single-necked flask, add 100mL of water, then add 10mg of chloroauric acid and 100mg of sodium citrate, and heat to 100°C for 1 hour under magnetic stirring to obtain stable and uniformly dispersed gold nanoparticles .

[0026] 2) The PET film is ultrasonically cleaned with acetone, ethanol, and triple-distilled water respectively, and then dried to obtain a PET film with a clean surface. At 10° C., the PET film was immersed in a 10 mg / mL 1,3-butanediamine solution in isopropanol to react for 0.1 h. Then the membrane was taken out, cleaned with water, and then dried under reduced pressure to constant weight to obtain a PET membrane with free amino groups introduced into the surface.

[0027] 3) In the petri dish, put the PET membrane containing free amino groups obtained in step 2), and then add 0.1mL of gold nanoparticles obtained in step 1) dropwise on the surface of the membrane, react at 20°C for 0.5hr, and wash wit...

Embodiment 2

[0031] 1) Preparation of metal nanoparticles: In a 100mL single-necked flask, add 100mL of water, then add 5mg of silver nitrate and 500mg of sodium citrate, and react at 20°C for 1h under magnetic stirring to obtain stable and uniformly dispersed silver nanoparticles.

[0032] 2) The PET film is ultrasonically cleaned with acetone, ethanol, and triple-distilled water respectively, and then dried to obtain a PET film with a clean surface. At 50° C., the PET film was immersed in 0.01 mg / mL glycerin triamine in isopropanol solution for 10 h to react. Then the membrane was taken out, cleaned with water, and then dried under reduced pressure to constant weight to obtain a PET membrane with free amino groups introduced into the surface.

[0033] 3) Put the PET membrane containing free amino groups obtained in step 2) into the petri dish, then add 10mL of silver nanoparticles obtained in step 1) dropwise on the surface of the membrane, react at 20°C for 0.5hr, and wash repeatedly wi...

Embodiment 3

[0037] 1) Preparation of metal nanoparticles: In a 100mL single-necked flask, add 50mL of water, then add 30mg of chloroplatinic acid and 3mg of sodium citrate, and react at 50°C for 1h under magnetic stirring to obtain stable and uniformly dispersed platinum nanoparticles.

[0038] 2) The PET film is ultrasonically cleaned with acetone, ethanol, and triple-distilled water respectively, and then dried to obtain a PET film with a clean surface. At 30° C., the PET film was immersed in 1 mg / mL ethylenediamine in isopropanol solution for 5 h. Then the membrane was taken out, cleaned with water, and then dried under reduced pressure to constant weight to obtain a PET membrane with free amino groups introduced into the surface.

[0039] 3) Put the PET film containing free amino groups obtained in step 2) into the petri dish, then add 10 mL of platinum nanoparticles obtained in step 1) dropwise on the surface of the film, react at 80°C for 10 hr, and wash repeatedly with water to rem...

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PUM

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Abstract

The invention discloses a method for preparing surfaces with bionic super hydrophobic property using enzyme biologic catalysis, comprising following steps: metallic nanometer particles in stable uniform dispersion are previously prepared; simultaneously surface grafting is conducted upon substrate material so that special functional groups are provided and metallic namometer particles are connected to the surface of substrate material; then metallic particles at the surface of the substrate material grow up to a micrometer size, and are catalyzed by enzyme catalyst; and finally a surface withsuper hydrophobic property by introduction of hydrophobic groups is obtained. The invention has the advantages of environmental protection, easy operation, strong controllability, excellent hydrophonic property of the obtained surfaces, huge application prospect in the fields such as micro-fluid equipments, antibacterial coating, diagnosis and testing of biologic numerators and biosensors.

Description

technical field [0001] The invention relates to a method for preparing a bionic superhydrophobic surface by using enzyme biocatalysis, and belongs to the interdisciplinary field of materials, biology, physics, chemistry and other disciplines. Background technique [0002] Wettability is an important physical and chemical property of a solid surface. When the contact angle between the surface of a solid and water is greater than 150 degrees, it is called a superhydrophobic material. Superhydrophobic materials have extremely broad application prospects in industrial and agricultural production and people's daily life. They can be used to prevent snow, rain, self-cleaning, anti-oxidation, prevent current conduction, and be used as microfluidic devices. [0003] Some plants, such as lotus leaves, taro leaves, and straw leaves, have superhydrophobicity and whitening ability, which is called the lotus leaf effect. The surface superhydrophobic phenomenon produced by the lotus leaf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/16C08L67/00C08L23/00C08L27/06C08L33/26C08L77/00C12S13/00C08K3/08C12S99/00
Inventor 徐建平李非凡计剑沈家骢
Owner ZHEJIANG UNIV