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Hydrogel microstructure template-based multifunctional superhydrophobic coating

A super-hydrophobic coating, hydrogel technology, applied in liquid separation, chemical instruments and methods, separation methods, etc., can solve the problem of difficulty in providing synthetic methods, and achieve excellent cycle performance, strong adaptability, and long cycle life. Effect

Active Publication Date: 2014-10-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing synthetic methods are difficult to provide universal superhydrophobic coatings on substrates with different material compositions and sizes, shapes and structures, and the main challenge in this field is still how to achieve low-cost and large-scale Surface treatment and super-hydrophobic coating with stable performance

Method used

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  • Hydrogel microstructure template-based multifunctional superhydrophobic coating
  • Hydrogel microstructure template-based multifunctional superhydrophobic coating
  • Hydrogel microstructure template-based multifunctional superhydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Embodiment 1: preparation of polyaniline superhydrophobic coating;

[0084] First configure 1ml of ammonium persulfate oxidant aqueous solution containing 0.286g, configure the monomer aqueous solution mixed with aniline (0.458ml) and phytic acid (0.921ml), and configure isopropanol (0.5ml) and tetraethyl orthosilicate (0.263ml) . The molar ratio of polyaniline and tetraethyl orthosilicate is 1:1, and similar results can be obtained for raw materials within the ratio range of the present invention. Then mix the three solutions, shake quickly after mixing, and then use a straw to draw the mixed solution and apply it to the treated clean silicon wafer, and spread it evenly. Within a few minutes, the polymerization reaction occurred, and the polyaniline hydrogel formed on the silicon wafer, which was covered with a plastic film to retain moisture. After 12 hours, the plastic film was removed, and the silicon wafer was soaked in deionized water for a few minutes. Dry the ...

Embodiment 2

[0085] Embodiment 2: preparation of polyaniline superhydrophobic coating (tetraethyl orthosilicate solute is changed into ethanol);

[0086] First configure 1ml of ammonium persulfate oxidant aqueous solution containing 0.286g, configure aniline (0.458ml) and phytic acid (0.921ml) mixed monomer aqueous solution, and configure ethanol (0.5ml) and tetraethyl orthosilicate (0.263ml). The molar ratio of polyaniline and tetraethyl orthosilicate is 1:1. Then mix the three solutions, shake quickly after mixing, and then use a straw to draw the mixed solution and apply it to the treated clean silicon wafer, and spread it evenly. Within a few minutes, the polymerization reaction occurred, and the polyaniline hydrogel formed on the silicon wafer, which was covered with a plastic film to retain moisture. After 12 hours, the plastic film was removed, and the silicon wafer was soaked in deionized water for a few minutes. Dry the silicon wafer at room temperature or in a drying oven and tr...

Embodiment 3

[0087] Embodiment 3: preparation of polypyrrole superhydrophobic coating;

[0088] First configure 0.5ml of ammonium persulfate oxidant aqueous solution containing 0.274g, configure aniline (0.084ml) and phytic acid (0.184ml) mixed monomer aqueous solution, and configure isopropanol (0.5ml) and tetraethyl orthosilicate (0.267ml ). The molar ratio of polyaniline and tetraethyl orthosilicate is 1:1. Then mix the three solutions, shake quickly after mixing, and then use a straw to draw the mixed solution and apply it to the treated clean silicon wafer, and spread it evenly. Within a few minutes, the polymerization reaction took place, and the polypyrrole hydrogel formed on the silicon wafer, which was covered with a plastic film to retain moisture. After 12 hours, the plastic film was removed, and the silicon wafer was soaked in deionized water for a few minutes. Dry the silicon wafer at room temperature or in a drying oven and treat it with octadecyltrichlorosilane (OTS) solut...

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Abstract

The invention discloses a hydrogel self-assembled microstructure template-based multifunctional superhydrophobic coating. Silicate ester is added into a hydrogel monomer (precursor) solution, after hydrogel monomer gelation and silicate ester hydrolysis, a silica microstructure film is formed, the silica microstructure film is modified by a self-assembled monomolecular film having hydrophobicity so that a super-hydrophobic coating is formed, the hydrogel monomer comprises at least one of aniline or its derivatives, and pyrrole or its derivatives, the silicate ester comprises at least one of methyl silicate, ethyl silicate, propyl silicate, butyl silicate and tetrachlorosilicane, and the self-assembled monomolecular film comprises at least one of silanization reagents such as alkylchlorosilane, alkylsiloxane, fluoroalkylchlorosilane and fluoroalkylsiloxane.

Description

technical field [0001] The invention relates to a surface interface material or an oil-water separation material, in particular to a multifunctional super-hydrophobic coating and its preparation technology using a hydrogel microstructure as a template. Background technique [0002] Controlling the surface properties of materials such as wettability is one of the main goals in the research of surface science. Surfaces with water contact angles (CA) greater than 150° and tumble angles (TA) less than 10° are called superhydrophobic surfaces [1,2], and have great application prospects such as: waterproof coatings [3-5] , self-cleaning surfaces [2], smooth surfaces [6], anti-wetting fabrics [7], drag-reducing coatings [8] and selective oil / water separation etc. [9]. The lotus leaf is an example of a natural superhydrophobic surface that allows water droplets to bead and roll off, allowing pollutants to be removed [10-13]. The reason is that the microscopic structure on the surf...

Claims

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Application Information

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IPC IPC(8): B01D17/022
Inventor 潘力佳余桂华王亚群石晔施毅
Owner NANJING UNIV
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