Preparation method of photo-thermal conversion porous material and product thereof

A porous material, photothermal conversion technology, applied in the field of solar energy applications, can solve the problems of low photothermal conversion efficiency, low steam generation rate, etc., and achieve excellent photothermal conversion effect, simple and fast preparation process, and adjustable absorbance. Effect

Pending Publication Date: 2021-03-02
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current PANI photothermal conversion materials still have problems such as low photothermal conversion efficiency and low steam generation rate.

Method used

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  • Preparation method of photo-thermal conversion porous material and product thereof
  • Preparation method of photo-thermal conversion porous material and product thereof
  • Preparation method of photo-thermal conversion porous material and product thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) 12ml of 0.5wt% aqueous dispersion of cellulose nanofibers was mixed with 3ml of 1,2-dichloroethane containing 2wt% polylactic acid. The emulsion was sonicated for 5 minutes at a power of 400 W, shaken evenly, and then sonicated again. After five cycles, the Pickering emulsion gel stabilized by cellulose nanofibers can be formed at room temperature, and the emulsion gel is transferred to a petri dish with a hemispherical convex structure mold, and frozen at -20°C for 12 hours;

[0034] (2) Put the emulsion gel in step (1) into a freeze dryer, and freeze-dry it at -49°C for 48 hours to prepare a composite airgel;

[0035] (3) Add 10 mL of hydrochloric acid to 106.5 mL of water, mix well and add 3.5 mL of aniline solution. The concentration of aniline in the final mixed solution is 0.32mol / L, and the concentration of H+ is 1mol / L; put the composite airgel prepared in step (2) into it and soak for 3h;

[0036] (4) Add 20ml hydrochloric acid in 220mL water, after mixin...

Embodiment 2

[0038] (1) 12ml of 0.5wt% aqueous dispersion of cellulose nanofibers was mixed with 3ml of 1,2-dichloroethane containing 2wt% polylactic acid. The emulsion was sonicated for 5 minutes at a power of 400 W, shaken evenly, and then sonicated again. After five cycles, the Pickering emulsion gel stabilized by cellulose nanofibers can be formed at room temperature, and the emulsion gel is transferred to a petri dish and frozen at -20°C for 12 hours;

[0039] (2) Put the emulsion gel in step (1) into a freeze dryer, and freeze-dry it at -49°C for 48 hours to prepare a composite airgel;

[0040] (3) Add 10 mL of hydrochloric acid to 106.5 mL of water, mix well and add 3.5 mL of aniline solution. The concentration of aniline in the final mixed solution is 0.08mol / L, H +The concentration is 1mol / L; put the composite airgel prepared in step (2) into it and soak for 3h;

[0041] (4) Add 20ml hydrochloric acid in 220mL water, after mixing evenly, then add 4.3814g ammonium persulfate, th...

Embodiment 3

[0043] (1) 12ml of 0.5wt% aqueous dispersion of cellulose nanofibers was mixed with 3ml of 1,2-dichloroethane containing 2wt% polylactic acid. The emulsion was sonicated for 5 minutes at a power of 400 W, shaken evenly, and then sonicated again. After five cycles, the Pickering emulsion gel stabilized by cellulose nanofibers can be formed at room temperature, and the emulsion gel is transferred to a petri dish and frozen at -20°C for 12 hours;

[0044] (2) Put the emulsion gel in step (1) into a freeze dryer, and freeze-dry it at -49°C for 48 hours to prepare a composite airgel;

[0045] (3) Add 3.275mL of sulfuric acid to 113.225mL of water, mix well and add 3.5ml of aniline solution. The concentration of aniline in the final mixed solution is 0.32mol / L, H + The concentration is 1mol / L; put the composite airgel prepared in step (2) into it and soak for 3h;

[0046] (4) Add 6.52ml of sulfuric acid in 233.48mL of water, after mixing evenly, then add 4.3814g ammonium persulfa...

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Abstract

The invention discloses a preparation method of a photo-thermal conversion porous material and a product thereof. The preparation method comprises the following steps: firstly, macroscopically designing the surface of a porous material by combining a special mold with an emulsion gelation and freeze drying technology, and then microscopically designing the polyaniline morphology on the surface ofthe porous material by controlling the concentration of an aniline monomer, the concentration of a doped acid and the type of acids in a solution used in an in-situ polymerization process. According to the porous material subjected to interface design, while the original morphology of polyaniline is reserved, the porous material is endowed with higher light absorptivity and lower heat loss, and shows higher surface temperature. The preparation method disclosed by the invention is simple and high in expansibility, and the prepared photo-thermal conversion porous material is high in steam generation rate and has a good application prospect in the aspect of solar-driven steam generation.

Description

technical field [0001] The invention relates to the technical field of solar energy applications, in particular to a preparation method of a light-to-heat conversion porous material and a product thereof. Background technique [0002] With the deepening of the sustainable development strategy, energy supply issues and energy structure issues have attracted more and more attention. With the continuous exploitation of human beings, the depletion of fossil energy is only a matter of time. On the other hand, the CO caused by the use of fossil energy 2 Greenhouse gases such as greenhouse gases also have great damage to the environment and ecology. Therefore, the improvement of energy structure and the use of green and clean energy have become the main goals of people's energy development. As a renewable and inexhaustible clean energy, solar energy has great development potential. In the face of increasingly severe energy crisis, environmental pollution, global warming and othe...

Claims

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Application Information

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IPC IPC(8): C08J9/40C08J9/28C08L67/04C08L1/02
CPCC08J9/405C08J9/286C08J2205/026C08J2367/04C08J2401/02C08J2479/02C08J2201/0482C08J2201/0484
Inventor李帅阳晓纯刘红霞
OwnerGUILIN UNIVERSITY OF TECHNOLOGY