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Photo-thermal super-hydrophobic coating based on MXene (at) Au hybrid and preparation method of photo-thermal super-hydrophobic coating

A technology of super-hydrophobic coatings and hybrids, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problem of low photothermal conversion efficiency of photothermal superhydrophobic coatings, and achieve improved photothermal conversion efficiency and excellent stability The effect of superhydrophobic performance

Active Publication Date: 2022-06-28
YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a photothermal superhydrophobic coating based on MXene@Au hybrid and its preparation method to solve the technical problem of low photothermal conversion efficiency of the photothermal superhydrophobic coating

Method used

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  • Photo-thermal super-hydrophobic coating based on MXene (at) Au hybrid and preparation method of photo-thermal super-hydrophobic coating
  • Photo-thermal super-hydrophobic coating based on MXene (at) Au hybrid and preparation method of photo-thermal super-hydrophobic coating
  • Photo-thermal super-hydrophobic coating based on MXene (at) Au hybrid and preparation method of photo-thermal super-hydrophobic coating

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Experimental program
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Effect test

Embodiment 1

[0044] A preparation method of photothermal superhydrophobic coating based on MXene@Au hybrid, comprising the following steps:

[0045] (1) Preparation of MXene nanosheets

[0046] Slowly add 10 mL of concentrated hydrochloric acid (6 mol / L) to 10 mL of deionized water, and stir well. Add 1 g of lithium fluoride powder to the solution and stir for 20 min to dissolve. Slowly add 1 g of MAX powder to the solution in several times, and after stirring for 30 minutes, turn on the heating, and make the mixed solution stir and react at a temperature of 55° C. and a rotation speed of 400 rpm for 24 hours. After the reaction was completed, the reaction was washed with water by ultrasonic centrifugation several times until the pH value was close to 7. The centrifuged product was placed in a vacuum drying oven and dried at 40 °C overnight to obtain MXene nanosheets.

[0047] (2) Preparation of gold nanoparticle dispersion

[0048] Prepare 10 mL of 0.1 mol / L cetyltrimethylammonium bro...

Embodiment 2

[0064] The photothermal superhydrophobic coating containing only MXene was prepared according to the same steps in Example 1 (the MXene powder was 1%, 2% and 4% according to the mass fraction of the aqueous polyurethane dispersion, without Au doping). like Figure 12As shown, for the photothermal superhydrophobic coatings containing different mass fractions of MXene prepared separately, when the mass fraction of MXene powder accounted for 3% of the aqueous polyurethane dispersion, the absorption spectrum of the coating showed the best performance, so based on this For optimization, the mass fraction of MXene powder in the aqueous polyurethane dispersion is set to be 3%. Therefore, when the mass fraction of MXene nanosheets in the aqueous polyurethane dispersion is less than 3%, the light absorption rate of the prepared coating increases with the mass fraction of MXene; and when the mass fraction of MXene nanosheets in the aqueous polyurethane dispersion exceeds At 3%, the lig...

Embodiment 3

[0066] The photothermal superhydrophobic coating containing MXene@Au was prepared according to the same steps as in Example 1, except that in the step (3), the mass ratio of MXene to Au was 12:1, 10:1 and 6 The corresponding photothermal superhydrophobic coatings were prepared separately from 1. like Figure 13 As shown, for Example 1 and Example 3, the coatings containing different mass ratios of MXene to Au were prepared, when the mass ratio of MXene to Au was 8 to 1, the absorbance spectra of the coatings showed the best performance , so based on this optimization, the mass ratio of MXene to Au is set to 8:1. When the mass ratio of MXene to Au in the MXene@Au hybrid dispersion is too high and the content of Au particles is low, the plasmon effect and photothermal synergistic effect are not obvious, and the coating absorption rate is not high. The light-to-heat conversion performance is not high. When the mass ratio of MXene to Au in the MXene@Au hybrid is too low, the co...

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Abstract

The invention provides a photo-thermal super-hydrophobic coating based on an MXene (at) Au hybrid and a preparation method of the photo-thermal super-hydrophobic coating. The preparation method comprises the following steps: (1) preparing an MXene nanosheet; adopting a gold seed solution regrowth method to obtain Au nanoparticles; (2) forming an MXene (at) Au hybrid dispersion liquid from the dispersion liquid of the MXene nanosheets and the Au nanoparticles, and drying to obtain MXene (at) Au hybrid powder; (3) adding the MXene (at) Au hybrid powder into waterborne polyurethane to obtain a waterborne polyurethane dispersion liquid of the MXene (at) Au hybrid; preparing modified super-hydrophobic silicon oxide nano particles; and (4) sequentially spraying the aqueous polyurethane dispersion liquid of the MXene (at) Au hybrid and the dispersion liquid of the modified super-hydrophobic silicon oxide nanoparticles, heating and drying to obtain the coating. The photothermal conversion capacity of the MXene photothermal hydrophobic coating is effectively improved, and the MXene photothermal hydrophobic coating can be applied to the fields of photothermal defrosting and deicing, remote light driving, medicine conveying and transferring and the like.

Description

technical field [0001] The invention belongs to the field of hydrophobic materials, in particular to a photothermal superhydrophobic coating based on MXene@Au hybrid and a preparation method thereof. Background technique [0002] The superhydrophobic surface has properties such as self-cleaning and water repellency; the contact angle of the superhydrophobic material is greater than 150°, and the rolling angle is less than 10°. As one of the superhydrophobic materials, photothermal superhydrophobic coatings have great potential in the fields of building anti-icing, outdoor defrosting and de-icing, flexible wearable devices, remote optical drives, and assisting drug delivery. To obtain a photothermal superhydrophobic coating with excellent performance, on the one hand, the photothermal material is selected to give the coating high photothermal conversion efficiency, and on the other hand, the surface has superhydrophobicity. [0003] The photothermal conversion efficiency of ...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/61C09D7/62
CPCC09D175/04C09D7/61C09D7/62C08K2201/011C08K2003/0831C08K3/14C08K3/08C08K9/06C08K3/34
Inventor 王佳莹王志明
Owner YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
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