Photo-thermal conversion material, preparation method and applications thereof

A technology of photothermal conversion and double-layer structure, which is applied in chemical instruments and methods, general water supply saving, lamination and other directions, can solve the problems of low solar photothermal conversion efficiency and high cost of photothermal conversion materials, and achieves a simple preparation process, The effect of improving photothermal conversion efficiency

Active Publication Date: 2020-02-21
SDIC XINJIANG LUOBUPO POTASH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a photothermal conversion material and its preparation met

Method used

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  • Photo-thermal conversion material, preparation method and applications thereof
  • Photo-thermal conversion material, preparation method and applications thereof
  • Photo-thermal conversion material, preparation method and applications thereof

Examples

Experimental program
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Embodiment 1

[0056] Such as figure 1 and figure 2 As shown in the middle figure (c), the light-to-heat conversion material is a polydopamine heterogeneously modified polyurethane sponge 1, and the polydopamine heterogeneously modified polyurethane sponge 1 has a double-layer structure, and the top layer of the double-layer structure The concentration of polydopamine in 2 is higher than the concentration of polydopamine in the bottom layer 3 of the double-layer structure, the top layer 2 of the double-layer structure is dark black, the thickness of the top layer 2 is 1.0 mm, and the double-layer structure 1 The total thickness is 20mm.

[0057] Wherein, the density of described polyurethane sponge is 0.2g / cm 3 , the porosity is 70%, the pore diameter is 50μm, and the specific surface area is 2.48m 2 / g.

[0058] Wherein, the load of polydopamine is 24.6 mg.

[0059] The preparation method of the light-to-heat conversion material comprises the following steps:

[0060] S1. Purifying p...

Embodiment 7

[0079] The double-layer modified sponge (PPU-2) is put into 150ml of filling, in the beaker of 3.5wt% salt water, press sponge in 3.5wt% salt water, make whole piece of sponge absorb water completely, and float on the water surface, then in by Under the broadband solar radiation provided by the solar simulator, it is equipped with adjustable components to control 1.0, 1.5, 2.0, 2.5 suns (1.0, 1.5, 2.0, 2.5kW / m 2 ). The solar intensity was measured with a photoradiometer, and the mass change of the water in the beaker was measured in real time with an electronic calibration balance.

[0080] Such as Figure 4 As shown, it is observed that under different solar irradiations, the photothermal conversion efficiency of solar steam is 86.1%, 91.3%, 92.2%, and 93.3%, respectively.

[0081] Compared with the prior art, there is no agitation and the container is not covered, so that the solution is in full contact with the air, and under the oxidation of sufficient oxygen, more dopam...

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Abstract

The invention discloses a photo-thermal conversion material, which has a double-layer structure, wherein the double-layer structure is a polydopamine layer on a polyurethane sponge layer, the top layer of the double-layer structure is dark black, the thickness of the top layer is 0.5-2.0 mm, and the total thickness of the double-layer structure is 10-25 mm. The preparation method of the photo-thermal conversion material comprises: S1, purifying polyurethane sponge; S2, loading polydopamine: immersing the polyurethane sponge purified in the step S1 into a container filled with a hydrochloric acid-containing dopamine trihydroxymethyl aminomethane buffer solution (Tris-HCl buffer solution), and carrying out a water bath reaction for 4-24 h at a temperature of 25-80 DEG C without any disturbance condition and container sealing to obtain modified sponge; and S3, drying. The invention also provides applications of the photo-thermal conversion material. According to the invention, with the photo-thermal conversion material, the problems of low efficiency, high cost, complex process and the like of the existing solar steam photo-thermal conversion are solved.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, and more specifically relates to a photothermal conversion material and its preparation method and application. Background technique [0002] One-third of the world's population, especially in developing countries and remote areas, still suffer from insufficient access to fresh water, ie the challenge of providing safe and sustainable water. Among the technologies for producing clean fresh water, solar energy absorption photothermal conversion technology has become one of the emerging and most promising technologies due to its low impact on the environment and the utilization of renewable and inexhaustible sunlight. . Various solar absorbers, including suspended metal nanoparticles, carbon materials, and plasmonic absorbers, have been developed for solar evaporation. Unfortunately, so far high solar steam efficiencies (>80%) are generally only achievable under high-intensity su...

Claims

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Application Information

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IPC IPC(8): B32B27/40B32B27/06B32B33/00B32B3/24B32B37/00B32B38/08B32B37/06C02F1/14C02F103/08
CPCB32B3/266B32B5/18B32B5/32B32B33/00B32B37/00B32B37/06B32B38/08B32B2250/02B32B2250/24B32B2255/102B32B2255/26B32B2260/02B32B2260/046B32B2305/022C02F1/14C02F2103/08Y02A20/124Y02A20/142Y02A20/212
Inventor 贾菲菲王清淼秦意李艳梅宋少先孙凯歌
Owner SDIC XINJIANG LUOBUPO POTASH CO LTD
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