High-adhesion super-hydrophobic surface of bionic salvinia natans and preparation method thereof

A super-hydrophobic surface and high-adhesion technology, which is applied to special surfaces, devices for coating liquid on the surface, coatings, etc., can solve problems such as complex methods, high cost, and complex equipment, and achieve simple operation and no complex equipment , good repeatability

Active Publication Date: 2020-01-21
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] According to the above-mentioned existing high-adhesion super-hydrophobic surface design route, there are technical problems such as complex met...

Method used

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  • High-adhesion super-hydrophobic surface of bionic salvinia natans and preparation method thereof
  • High-adhesion super-hydrophobic surface of bionic salvinia natans and preparation method thereof
  • High-adhesion super-hydrophobic surface of bionic salvinia natans and preparation method thereof

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preparation example Construction

[0033] The present invention proposes a high-adhesion superhydrophobic surface of bionic locust leaf apple and its preparation method, and its preparation process is as followsfigure 1 As shown, it specifically includes the following steps.

[0034] (1) Micro-nano structure roughening treatment of various substrates: metal surfaces such as aluminum plates, copper plates, and iron plates, and polymer surfaces such as polystyrene, polymethyl methacrylate, polycarbonate, and polymethylsiloxane With one or more mixtures on the surface of inorganic materials such as silicon wafers and glass as the substrate, various roughness of the micro-nano structure can be obtained by chemical corrosion, photolithography, template method, phase separation, sol-gel and other methods. surface.

[0035] (2) Hydrophobic treatment: select the perfluorodecyltrichlorosilane-toluene solution that is 0.1% by weight fraction, the methyltrichlorosilane-toluene solution that is 0.1% by weight fraction, and...

Embodiment 1

[0040] This embodiment provides a method for preparing a bionic pagoda leaf apple high-adhesion superhydrophobic surface based on an aluminum sheet, which specifically includes the following steps:

[0041] (1) Aluminum sheet is selected as the substrate, and the rough surface of the micro-nano composite structure is obtained by chemical etching. The aluminum sheet was ultrasonically cleaned with ethanol and deionized water for 30 minutes respectively, then corroded in 4 mol / L hydrochloric acid solution for 10 minutes, then ultrasonically cleaned with deionized water for 10 minutes, taken out and blown dry with nitrogen for later use.

[0042] (2) Soak the aluminum sheet treated in step (1) in a perfluorodecyltrichlorosilane-toluene solution with a weight fraction of 0.1% to carry out hydrophobic modification, and the soaking time is 1 hour. After that, they were washed with acetone, ethanol and deionized water, blown dry with nitrogen gas, and dried in an oven at 120°C for 2 ...

Embodiment 2

[0046] This embodiment provides a method for preparing a bionic pagoda leaf apple high-adhesion superhydrophobic surface with a polydimethylsiloxane polymer film as a substrate, which specifically includes the following steps:

[0047] (1) Select polydimethylsiloxane, and obtain a rough surface with micro-nano composite structure by template method. Prepare dimethylsiloxane and curing agent in a weight ratio of 10 / 1, stir evenly and remove air bubbles. Select 800 mesh sandpaper and drop-coat trimethylchlorosilane as an anti-adhesive agent. Then pour the prepared mixture onto the sandpaper surface treated with the anti-adhesive agent above, vacuumize in the vacuum container, and then transfer to an oven with a temperature of 60° C. for curing for 4 hours.

[0048] (2) Peel off the cured polydimethylsiloxane film and sandpaper to obtain a micro-nano composite rough structure polydimethylsiloxane surface with a reverse structure of sandpaper. Hydrophobic modification was carrie...

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Abstract

The invention provides a high-adhesion super-hydrophobic surface of bionic salvinia natans and a preparation method thereof, and belongs to the field of super-hydrophobic surfaces. The high-adhesion super-hydrophobic surface is obtained by taking various super-hydrophobic surfaces of micro-nano composite structures as substrates and performing soaking treatment through a dopamine buffer solution to modify the top ends of the microstructures of the substrates by polydopamine. The surface has the characteristics of the bionic salvinia natans, namely the top ends of the microstructures of the surface are hydrophilic and other parts are hydrophobic, so that the surface of the material has high-adhesion super-hydrophobic performance. The high-adhesion super-hydrophobic surface of the bionic salvinia natans has the characteristics of simple preparation method, wide substrate selectivity, high controllability and the like, is particularly suitable for transferring lossless trace liquid dropsand solid microparticles, and can be widely applied to the fields of scientific research and production of chemistry, physics, machinery, biology, medicine and the like.

Description

technical field [0001] The invention relates to the technical field of super-hydrophobic surfaces, in particular, to a highly-adhesive super-hydrophobic surface imitating bionic Sophora japonica and a preparation method thereof. Background technique [0002] Since the literature report that the arrayed polystyrene nanotube film has high adhesion superhydrophobic properties (the literature report has "Advanced Materials" magazine Adv.Mater.2005,17,1997-1981.), the research of high adhesion superhydrophobic surface attracted widespread attention. High-adhesion superhydrophobic surfaces play a unique role in loss-free liquid transfer, enabling the manipulation of corrosive, valuable, and highly toxic micro-droplets and have attracted much attention in the fields of medicine, biology, and scientific research. At present, the design route of high-adhesion superhydrophobic surface mainly includes the following aspects: [0003] (1) Build a special nanotube structure to achieve h...

Claims

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Application Information

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IPC IPC(8): B05D5/00B05D7/24B05D7/14B05D7/02B05D7/00
CPCB05D5/00B05D7/00B05D7/02B05D7/14B05D7/24B05D2203/30
Inventor 金美花周凯张雨柔
Owner DALIAN MARITIME UNIVERSITY
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