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A kind of stimuli-responsive film material and preparation method thereof

A technology for stimuli-responsive, thin-film materials, applied in the field of super-oleophilic/super-oleophobic stimuli-responsive thin-film materials, can solve the problems of environmental hazards, limited practical application, difficulty in making superoleophobic surfaces, etc., and achieves a simple preparation method. , the effect of easy availability of raw materials

Active Publication Date: 2018-05-29
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And superhydrophobic / superhydrophilic controllable smart surfaces have appeared. However, because the surface energy of oil and some organic matter is much lower than that of water, it is very difficult to make superoleophobic surfaces.
At present, a large number of surface modification methods containing fluorine-containing low surface energy compounds are used, but these fluorine-containing compounds are not only expensive but also harmful to the environment, and their practical applications are limited. More importantly, these fluorine-containing surfaces will lose their superoleophobic properties under water (Langmuir2009 ,25,14165-14173)

Method used

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  • A kind of stimuli-responsive film material and preparation method thereof
  • A kind of stimuli-responsive film material and preparation method thereof
  • A kind of stimuli-responsive film material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Synthesis of Ionic Polyacrylamide

[0047] Anionic polyacrylamide preparation method:

[0048]Add acrylamide (AM) and acrylic acid (AA) into a three-necked flask equipped with a thermometer and a stirrer to prepare an aqueous solution. Wherein, the total concentration of the monomer is 10-20wt%; nitrogen is passed through to drive oxygen for 20 minutes, ammonium persulfate and sodium bisulfite initiator are added, stirred evenly, and then placed in a constant temperature water bath and heated to a predetermined temperature of 60° , After reacting for 8h-12h, the reaction was terminated; the reaction solution was precipitated by ethanol / acetone, filtered through a Buchner funnel, and the obtained powder solid was vacuum-dried at 50°C for 12h to obtain anionic polyacrylamide.

[0049] Cationic polyacrylamide preparation method:

[0050] The preparation method is the same as above, wherein dimethyl diallyl ammonium chloride (DMDAAC) is used instead of acrylic acid (AA) t...

Embodiment 2

[0052] Preparation of polymer cured thin film coatings

[0053] Soak the silicon substrate in 98% H at a volume fraction of 3:1 2 SO 4 and 30% H 2 o 2 In the mixed solution, the mixed solution is used as a cleaning solution, and the silicon wafer is ultrasonically cleaned in the cleaning solution at 50°C; then the silicon wafer is cleaned with deionized water, and the cleaned silicon wafer is placed in a drying oven at 70°C for Dry and set aside.

[0054] Mix the anionic polyacrylamide and cationic polyacrylamide prepared in Example 1 uniformly with each other in a ratio of 4:1 to prepare an aqueous solution, and stir evenly, wherein the total mass fraction of the above two polymers is 10% to 20wt%; then 1. Add glutaraldehyde to the polymer aqueous solution, the amount of glutaraldehyde added is 5% of the polymer mass, stir evenly, and prepare the coating liquid.

[0055] Using the method of spin coating, the above coating liquid is evenly coated on the substrate, the ini...

Embodiment 3

[0057] Fabrication and Characterization of Nanocone-Spine Microstructured Surfaces

[0058] Prepare the anionic polyacrylamide prepared in Example 1 into a 15-20 wt% aqueous solution, add the crosslinking agent glutaraldehyde, the amount of glutaraldehyde added is 2% of the mass of the anionic polyacrylamide, stir evenly, and prepare The film-forming solution was left to stand for use.

[0059] Soak the glass substrate in 98% H at a volume fraction of 3:1 2 SO 4 and 30% H 2 o 2 In the mixed solution, the mixed solution is used as a cleaning solution, and the glass sheet is ultrasonically cleaned in the cleaning solution at 50°C; then the glass sheet is cleaned with deionized water, and the cleaned glass sheet is placed in a drying oven at 70°C for Dry and set aside.

[0060] Using the method of spin coating, the polymer solution is evenly coated on the substrate, the initial speed is 600r / min, the time is 5s, then the speed is increased to 1500r / min, the time is 20s, the ...

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Abstract

The invention discloses a stimuli-responsive thin film material, the film surface has a cone-like microstructure, the particle size of the cone spines is 20-80nm, the density is 20-200μm-2, and the height is 2-20nm. Belonging to intelligent materials, under the action of water, the surface rapidly undergoes reversible changes of superoleophilicity / superoleophobicity, and has good stability. At the same time, the film has ultra-low oil adhesion under water, showing good self-cleaning and antifouling properties.

Description

technical field [0001] The present invention relates to smart materials. More specifically, it relates to a super-oleophilic / super-oleophobic stimulus-responsive film material. Background technique [0002] Responsive materials are a hot field in the research and development of modern functional polymers. Under external environmental stimuli (including temperature, light, electricity, pH of the solution, ionic strength, and biological substances, etc.), their physical and chemical properties will change accordingly. , has become an important class of smart materials, and how to improve the magnitude of the response has become an important goal. Since surface wettability is a very important property of solid materials, especially functional surfaces with special wettability, such as superhydrophobicity, superoleophobicity, superhydrophilicity, and superoleophilicity, further development of such responsive surface materials It is of great value, especially in some high-tech ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J7/00C08L33/26
Inventor 吴飞鹏魏宁宁王尔鑑
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI