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Soft template and ultraviolet curing process to prepare surface super hydrophobic material

A soft template and super-hydrophobic technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of complex process and equipment requirements, reduced super-hydrophobic performance, and insufficiently low surface energy, achieving low cost and low pollution , the effect of high polymerization efficiency

Inactive Publication Date: 2006-08-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the above-mentioned methods still have many limitations: the general process of constructing rough surface structure and chemical reaction to form hydrophobic film is relatively complicated, and requires special equipment and materials; the materials directly coated on the surface generally contain Fluorine organic matter does not meet the requirements of environmentally friendly development, and the use of other organic coatings often leads to a decrease in superhydrophobic performance due to insufficient low surface energy; at the same time, the combination of the above two methods usually has better superhydrophobic performance, but the process Process and equipment requirements are also more complex
At present, there is no literature report on the preparation of surface superhydrophobic materials by ultraviolet light curing method.

Method used

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  • Soft template and ultraviolet curing process to prepare surface super hydrophobic material
  • Soft template and ultraviolet curing process to prepare surface super hydrophobic material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Mix polydimethylsiloxane (PDMS, sylgard 184, purchased from Dow Corning Company) prepolymer (siliconeelastomer base) and crosslinking agent (silicone elastomer curing agent) in a mass ratio of 10:1, pour until clean On the flat surface of the lotus leaf, after standing for 20 minutes, it will become an elastomer after being heated and cured. The reaction temperature is 40°C, and the reaction time is 4 hours; After curing, the PDMS elastic template can be obtained by peeling off.

[0036] Oligomer EMA 2g, oligomer UA 1g; monomer IBA 0.5g, monomer AE 0.5g; crosslinking agent N, N'-methylenebisacrylamide 0.25g; photoinitiator α-hydroxycyclohexyl 0.2 g of phenyl ketone was mixed uniformly to prepare a prepolymer. Place the prepolymer between the glass substrate and the elastic template, and expose it to ultraviolet light for 8 minutes. The light source is a high-pressure mercury lamp with a main emission wavelength of 365nm, and the intensity of ultraviolet light is I=10mW...

Embodiment 2

[0038] Mix the prepolymer and crosslinking agent of polydimethylsiloxane (PDMS, sylgard 184, purchased from Dow Corning Company) uniformly in a mass ratio of 3:1, pour it on the clean and flat lotus leaf surface, and let it stand for 10 Minutes later, it becomes an elastomer after being heated and cured. The reaction temperature is 30°C, and the reaction time is 2 hours; After curing, the PDMS elastic template can be obtained by peeling off.

[0039] Mix oligomer EA 1g, oligomer SUA 5g; monomer MDA 0.5g, monomer IBA 0.3g; crosslinking agent diethylene glycol diacrylate 1.2g; photoinitiator benzoin dimethyl ether 0.25g and mix well, Prepared as a prepolymer. Place the prepolymer between the silicon substrate and the elastic template, and expose it to ultraviolet light for 2 minutes. The light source is a high-pressure mercury lamp with a main emission wavelength of 365nm, and the intensity of ultraviolet light is I=10mW / cm 2 , the prepolymer is polymerized and cross-linked, a...

Embodiment 3

[0041] Mix the prepolymer and crosslinking agent of polydimethylsiloxane (PDMS, sylgard 184, purchased from Dow Corning Company) in a mass ratio of 7:1, pour it onto the clean and flat lotus leaf surface, and let it stand for 40 Minutes later, it will become an elastomer after being heated and solidified. The reaction temperature is 50°C and the reaction time is 6 hours; After curing, the PDMS elastic template can be obtained by peeling off.

[0042] Oligomer EMA 0.5g, oligomer SUA 6g, oligomer EA 1g; monomer IBA 0.5g, monomer MA 0.3g, monomer PEA 0.2g, monomer IBA 0.25g, monomer MDA 0.5g; Crosslinking agent dipentaerythritol pentaacrylate 0.5g; Photoinitiator [α-hydroxyl, α-phenylpropiophenone] 0.25g, photoinitiator 1-hydroxycyclohexyl benzophenone 0.15g, photoinitiator 2-hydroxyl- 0.1 g of 2-methyl-1-phenylacetone was uniformly mixed to prepare a prepolymer. Place the prepolymer between the quartz substrate and the elastic template, and expose it to ultraviolet light for 1...

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Abstract

The present invention is soft template an ultraviolet curing process to prepare surface super hydrophobic material, and belongs to the field of solid material surface modifying technology. The surface super hydrophobic material is prepared through preparation of elastic soft template, setting the pre-polymer between the elastic template and the base board, ultraviolet irradiation to cure and eliminate the elastic template to obtain surface super hydrophobic material. The surface super hydrophobic material of cross-linked polymer is adhered onto the base board and is easy to separate from the elastic template. The surface super hydrophobic material has pattern copied from the elastic template, excellent super hydrophobic performance and surface water contact angle at room temperature greater than 150 deg. The surface super hydrophobic material has simple preparation process, high polymerization efficiency, less pollution, low cost and environment friendship.

Description

technical field [0001] The invention discloses a method for preparing a surface super-hydrophobic material by using a soft template and ultraviolet light curing technology, relates to a method for forming a super-hydrophobic surface of an ultraviolet light curing material, and belongs to the technical field of surface modification methods of solid materials. Background technique [0002] A superhydrophobic surface generally refers to a surface with a contact angle with water greater than 150° and a small rolling angle. This kind of surface with special wettability has always been highly concerned by people. People's research interest in super-hydrophobic surfaces originally originated from super-hydrophobic phenomena in nature, such as water bird feathers, lotus leaves, rice leaves, and legs of water insects. Due to its important characteristics such as waterproof, anti-fog, anti-oxidation, and self-cleaning, super-hydrophobic surfaces have extremely broad application prosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/18C08J5/00
Inventor 刘斌阮维青范寅王晓工
Owner TSINGHUA UNIV
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