Solar photothermal conversion material and preparation method thereof

A technology for photothermal conversion materials and solar energy, applied in the field of solar photothermal conversion materials and their preparation, can solve the problem that the efficiency of solar photothermal conversion materials needs to be improved, achieves good industrialization prospects, solves the problem of salt junction, and is easy to operate. Effect

Active Publication Date: 2019-01-15
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a solar photothermal conversion material and its preparation me...

Method used

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  • Solar photothermal conversion material and preparation method thereof
  • Solar photothermal conversion material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0044] Preparation of carbon black-polyacrylamide solar photothermal conversion materials:

[0045] 0.5 g of carbon black, 1.5 g of acrylamide (AM), 0.0033 g of N,N - Add methylenebisacrylamide (MBA) and 0.0048 g of ammonium persulfate (APS) to 8 g of deionized water, and use a cylindrical sponge with a height of 1 cm and a radius of 2 cm to absorb the above reaction solution. The gelation was carried out in an oven at ℃, and a preliminary sponge-based hydrogel composite sample was obtained after 24 h of reaction. Soak in water for 12 h to remove unreacted monomers, freeze-thaw several times, and finally freeze-dry, then swell in water to obtain the final carbon black-polyacrylamide solar photothermal conversion material.

Embodiment 2

[0047] Preparation of carbon black-polyvinyl alcohol solar photothermal conversion materials:

[0048] 0.5 g of carbon black, 1.0 g of polyethylene glycol (PVA), 70 mu L of glutaraldehyde (GA) was added to 9.0 g of water, adding 50 mu 1.2 mol / L HCl aqueous solution in 1 L was used to prepare the reaction solution, and it was mixed evenly by ultrasonic waves. Immediately, a cylindrical sponge with a height of 1 cm and a radius of 2 cm was used to absorb the above reaction solution, gelatinized at room temperature, and reacted for 24 h to obtain Preliminary sponge-based hydrogel composite samples. Soak in water for 12 h to remove unreacted monomers, freeze-thaw several times, and finally freeze-dry, then swell in water to obtain the final carbon black-polyvinyl alcohol solar-to-thermal conversion material.

[0049] In summary, the present invention aims to design a highly efficient solar-to-thermal conversion material with self-cleaning function. This method can disperse wat...

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Abstract

The invention discloses a solar photothermal conversion material and a preparation method thereof, wherein the method comprises the steps of: a light absorbing material, a water-soluble monomer, an initiator and a crosslinking agent are mixed and dispersed in water to obtain a reaction liquid; or the light absorbing material, a water-soluble polymer and the crosslinking agent are mixed and dispersed in the water to obtain a reaction liquid; the reaction liquid is adsorbed by a sponge, and gelatinized to obtain a hydrogel, and after several cycles of freeze-thawing, freeze-drying and dissolvingof the hydrogel in water until the hydrogel is saturated to swell, the solar photothermal conversion material is obtained. The porous property of a sponge material enhances the water absorption of the solar photothermal conversion material, and can solve the salt deposition problem, and the solar photothermal conversion material has self-cleaning property. In the solar photothermal conversion material, the light absorbing material ensures the light absorption of the solar photothermal conversion material, and the hydrogel material can reduce the latent heat required for evaporation of water,so that high photothermal conversion efficiency and high evaporation rate can be ensured.

Description

technical field [0001] The invention relates to the field of photothermal materials, in particular to a solar photothermal conversion material and a preparation method thereof. Background technique [0002] Solar photothermal conversion material is a material that can absorb sunlight and convert it into heat energy to accelerate water evaporation. It can be used in many fields such as seawater desalination and wastewater treatment. It is an energy-saving, environmentally friendly and sustainable desalinated water production method. However, the efficiency of solar photothermal conversion materials still needs to be improved, and the salt formation problem needs to be solved. In order to improve the efficiency of solar photothermal conversion, the methods that have been proposed so far include heat collection method, method of increasing light intensity, method of adding light absorber, method of building multi-level structure, method of reducing latent heat, but these method...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F222/38C08K3/04C08L71/02C08J3/075
CPCC08F220/56C08J3/075C08J2333/26C08J2371/02C08K3/04C08F222/385C08L71/02
Inventor 刘翼振梁学称刘智鹏黄其琛
Owner SHENZHEN UNIV
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