A kind of preparation method and application of superwetting janus material
A super-wetting and super-hydrophilic technology, which is applied in the field of preparation of super-wetting Janus materials, can solve the problems of super-wetting Janus interface materials, such as cumbersome steps, difficult control of operating conditions, and difficulty in controlling the direction of fluid transport. The method is simple and convenient, Effects with a wide range of applications and less time-consuming
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[0037] The invention provides a kind of preparation method of superwetting Janus material, comprises the following steps:
[0038] Provide copper mesh or copper foam; the aperture of the copper mesh is 20-100 mesh, and the porosity of the copper foam is 50-90%;
[0039] Etching the copper mesh or copper foam in a corrosive solution to obtain a superhydrophilic copper mesh or superhydrophilic copper foam; the corrosive solution is a mixed solution of ammonium persulfate solution and sodium hydroxide solution;
[0040] pre-curing the pre-polydimethylsiloxane solution to obtain pre-cured polydimethylsiloxane;
[0041] The superhydrophilic copper mesh or superhydrophilic copper foam is placed on the surface of the pre-cured polydimethylsiloxane for hydrophobic modification, and at the same time, the superhydrophilic copper mesh is controlled by dropping deionized water Or after the contact time of the super-hydrophilic copper foam and the polydimethylsiloxane of the pre-curing, a...
Embodiment 1
[0061] Provide a copper mesh (aperture 20 mesh); ultrasonically clean the copper mesh in absolute ethanol for 20 minutes, wash it 3 times, rinse it with a large amount of deionized water, and then place it in a 1mol / L hydrochloric acid solution for ultrasonic cleaning After 10 minutes, rinse the copper material with a large amount of deionized water, dry it at room temperature, and set it aside;
[0062] According to the volume ratio of 1:1, mix the ammonium persulfate solution with a concentration of 0.015 mol / L and the sodium hydroxide solution with a concentration of 5 mol / L to obtain a corrosion solution;
[0063] After the pretreated copper grid is placed in the etching solution for etching (at a temperature of 30° C. and a time of 8 min), it is washed with a large amount of deionized water and dried at room temperature to obtain a super-hydrophilic copper grid;
[0064] Mix dimethylsiloxane and cross-linking agent (mass ratio: 10:1) and stir evenly, vacuum filter for 30 ...
Embodiment 2
[0067] Provide a copper mesh (30 mesh aperture); ultrasonically clean the copper mesh in absolute ethanol for 20 minutes, wash it 3 times, rinse it with a large amount of deionized water, and then place it in a 1mol / L hydrochloric acid solution for ultrasonic cleaning After 10 minutes, rinse the copper material with a large amount of deionized water, dry it at room temperature, and set it aside;
[0068] According to the volume ratio of 1:1, mix the ammonium persulfate solution with a concentration of 0.015 mol / L and the sodium hydroxide solution with a concentration of 5 mol / L to obtain a corrosion solution;
[0069] After the pretreated copper grid is placed in the etching solution for etching (at a temperature of 30° C. and a time of 8 min), it is washed with a large amount of deionized water and dried at room temperature to obtain a super-hydrophilic copper grid;
[0070] Mix dimethylsiloxane and cross-linking agent (mass ratio: 10:1) and stir evenly, vacuum filter for 30 ...
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