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Self-floating wood-based hydrogel photo-thermal evaporator and preparation method and application thereof

A hydrogel, self-floating technology, applied in the direction of gel preparation, chemical instruments and methods, general water supply saving, etc., to achieve wide application prospects, highlight the effect of photoevaporation rate and efficiency, and significant photothermal purification ability

Pending Publication Date: 2022-03-01
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although water resources occupy 71% of the earth's surface area, the fresh water resources available for human use only account for 4% of the total water volume. Fresh water shortage is becoming a serious global problem

Method used

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  • Self-floating wood-based hydrogel photo-thermal evaporator and preparation method and application thereof
  • Self-floating wood-based hydrogel photo-thermal evaporator and preparation method and application thereof
  • Self-floating wood-based hydrogel photo-thermal evaporator and preparation method and application thereof

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Embodiment 1

[0030] A preparation method of self-floating wood-based hydrogel photothermal material, comprising the following steps:

[0031] (1) Cut the balsa wood perpendicular to its water delivery channel and cut it into 2*2cm blocks (remembered as Wood); burn its upper surface evenly with a spray gun flame at 1300 ° C, and immediately immerse it in deionized water to obtain Photothermal evaporator (referred to as B-Wood);

[0032] (2) be that chitosan is joined in mass fraction by being in the 1wt% acetic acid solution, high-speed stirring is to dissolving completely, obtains the chitosan solution that mass concentration is 5wt%; Alcoholysis degree is that the polyvinyl alcohol of 87.0% joins in In hot deionized water, heat in a water bath at 100°C, stir at high speed until completely dissolved, and obtain a polyvinyl alcohol solution with a mass concentration of 10% by weight;

[0033] (3) Mix the polyvinyl alcohol solution with the chitosan solution, put it into a magnet and stir e...

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Abstract

The invention discloses a self-floating wood-based hydrogel photo-thermal evaporator and a preparation method and application thereof, and belongs to the technical field of photo-thermal conversion. The preparation method comprises the following steps: mixing chitosan and polyvinyl alcohol to prepare an interpenetrating network polymer, and then combining a wood material with the polymer to prepare the photo-thermal wood-based hydrogel material. A wood material is subjected to surface treatment through high-temperature firing of a spray gun, the sunlight absorptivity of the surface of the balsa wood is improved, natural pore channels of the balsa wood are filled with a hydrogel photo-thermal material, energy needed by evaporation is reduced, evaporation enthalpy change is reduced, and efficient water production is achieved while rapid water delivery of the evaporator is ensured. The hydrogel material is simple in preparation process and has wide application prospects in the fields of sewage treatment, seawater desalination and the like.

Description

technical field [0001] The invention belongs to the technical field of photothermal conversion, and in particular relates to a self-floating wood-based hydrogel photothermal evaporator and its preparation method and application. Background technique [0002] Since the first industrial revolution, human society has developed rapidly, but the ensuing water resource crisis and environmental pollution problems are increasing day by day. Although water resources occupy 71% of the earth's surface area, the fresh water resources available for human use only account for 4% of the overall water volume. Fresh water shortage is becoming a serious global problem. Due to the abundance of solar energy resources, the effective use of seawater and sewage resources through solar photothermal evaporation technology will undoubtedly alleviate the serious problem of insufficient fresh water resources. In order to accelerate the development and practical application of solar photothermal evapor...

Claims

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Application Information

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IPC IPC(8): B01J13/00C02F1/04C02F1/14C02F101/30C02F103/08
CPCB01J13/0065C02F1/14C02F1/048C02F2101/308C02F2103/08Y02A20/124Y02A20/142Y02A20/212
Inventor 陆依范德琪唐奕成张昊杨小飞
Owner NANJING FORESTRY UNIV
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