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Lotus leaf surface-imitated super-hydrophobic film and preparation method thereof

A super-hydrophobic, imitation lotus leaf technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems that limit the wide application of micro/nano coatings, the inability to form large-scale films, and the complicated preparation process, and achieve stable storage Good performance, low cost and good mechanical properties

Inactive Publication Date: 2012-10-03
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these surface treatments generally need to be carried out under strict laboratory equipment and process control conditions, or can only be realized on special substrates (such as carbon nanotube arrays), and the preparation process is complicated and costly, and it is impossible to form large-scale films. Thus limiting the wide application of micro / nano coatings in the production field

Method used

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  • Lotus leaf surface-imitated super-hydrophobic film and preparation method thereof
  • Lotus leaf surface-imitated super-hydrophobic film and preparation method thereof
  • Lotus leaf surface-imitated super-hydrophobic film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Kind of like figure 1 The superhydrophobic film imitating the surface of the lotus leaf of the present invention is shown, and the superhydrophobic film includes a base film made of low surface energy material and a micro / nano structure formed on the base film. The base film is a composite of organic fluorine modified acrylate and organic silicon modified polyurethane. The micro / nano structure includes micron-sized particles uniformly distributed on the base film (the average particle size of the micron-sized particles in this embodiment is about 3 μm, see figure 1 ) And the nanoscale papillae grown on the micron-scale particles (the average particle size of the nanoscale papillae in this example is about 40nm, see figure 1 ), the micron-sized particles and nano-sized papillae are made of modified Fe 3 O 4 Aggregated by nanoparticles. In the superhydrophobic film imitating the surface of the lotus leaf of this embodiment, the modified Fe 3 O 4 The mass ratio of nanopartic...

Embodiment 2

[0038] A super-hydrophobic film imitating the surface of a lotus leaf of the present invention. The super-hydrophobic film comprises a base film made of low surface energy material and a micro / nano structure formed on the base film. The base film is a composite of organic fluorine modified acrylate and organic silicon modified polyurethane. The micro / nano structure includes uniformly distributed micron-sized particles (average particle size around 5μm) on the base film and nano-sized papillae (average particle size around 40nm) grown on the micron-scale particles, the micron-scale particles and Nanoscale papillae are made of modified SiO 2 Aggregated by nanoparticles. In the super-hydrophobic film on the surface of the lotus leaf of this embodiment, the modified SiO 2 The mass ratio of nanoparticles to base film is 0.1:1.

[0039] The superhydrophobic film imitating the surface of the lotus leaf of this embodiment is specifically prepared by the following steps:

[0040] (1) Prep...

Embodiment 3

[0047] A super-hydrophobic film imitating the surface of a lotus leaf of the present invention. The super-hydrophobic film comprises a base film made of low surface energy material and a micro / nano structure formed on the base film. The base film is a composite of organic fluorine modified acrylate and organic silicon modified polyurethane. The micro / nano structure includes uniformly distributed micron-sized particles (average particle size around 5μm) on the base film and nano-scale papillae (average particle size around 40nm) grown on the micron-scale particles. The micron-scale particles and Nanoscale papillae are made of modified TiO 2 Aggregated by nanoparticles. In the super-hydrophobic film imitating the surface of the lotus leaf of this embodiment, the modified TiO 2 The mass ratio of nanoparticles to base film is 0.2:1.

[0048] The super-hydrophobic film imitating the surface of the lotus leaf of this embodiment is specifically prepared by the following steps:

[0049] ...

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Abstract

The invention discloses a lotus leaf surface-imitated super-hydrophobic film and a preparation method thereof. The super-hydrophobic film comprises a base membrane made of a low surface energy material and a micro / nano structure formed on the base membrane, wherein the micro / nano structure comprises micron particles evenly distributed on the base membrane and nano mastoids grown on the micron particles. The preparation method comprises the following steps: firstly, dispersing oxide nano particles in a modified solution added with a coupling agent, stirring, separating and drying, thus obtaining modified oxide nano particles; then adding an initiator in the modified oxide nano particle solution, heating, and simultaneously dropwise adding a mixed monomer solution of fluorine-containing acrylate monomers and hydroxyl-containing acrylate monomers; mixing with organic silicon modified polyurethane, and adding a catalyst so as to obtain a nano composite solution after reaction; and finally, filming by utilizing the diluted nano composite solution, and drying so as to obtain the lotus leaf surface-imitated super-hydrophobic film. The film discloses by the invention has the advantages ofgood self-cleaning effect, good mechanical property and stability, low cost, environmental friendliness and the like.

Description

Technical field [0001] The invention relates to a composite organic film and a preparation method thereof, in particular to a superhydrophobic film and a preparation method thereof. Background technique [0002] In nature, the surface of the lotus leaf has a unique self-cleaning function, which is determined by the surface microstructure and low surface energy chemicals. It can be seen from the SEM picture of the surface of the lotus leaf that the surface is composed of many papillae of 5μm-9μm, and each papillae has a nano-level secondary structure. The super-hydrophobic micro-nano secondary structure (micro / nano structure for short) on the surface of the lotus leaf includes: the surface cell morphology of the lotus leaf has a micro / nano dual-scale papillary structure, and the surface micro / nano structure contains hydrophobic wax Plastid. As the super-hydrophobic self-cleaning micro / nano structure characteristics and mechanism of the lotus leaf surface are recognized by people...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08K9/06C08K3/36C08K3/22C08G18/77C08G18/62C08F220/28C08F220/14C08F220/18C08F212/08C08F220/22C08F2/44C08J5/18C09D175/04C09D7/12C09D5/00
Inventor 王建方田小洲钱斯文吴文健王璟赖媛媛
Owner NAT UNIV OF DEFENSE TECH
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