Pleurotus eryngii-based photo-thermal conversion material and preparation method thereof

A light-to-heat conversion material and light-to-heat conversion technology, applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of increased material cost, high manufacturing cost, and poor environmental friendliness, and reduce heat loss and reaction Good activity and simple operation

Active Publication Date: 2021-06-04
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photothermal conversion material prepared by this method has cumbersome steps, many types of raw materials and chemical reactions, poor environmental friendliness, and graphene oxide is expensive, and the manufacturing cost is relatively high.
[0004] Existing light-to-heat conversion materials rarely use biological materials as substrates, and more modified materials use graphene and its derivatives, which greatly increases the cost of materials, and most of them require multiple assembly, integrating water absorption, heat preservation, There are fewer materials for photothermal conversion

Method used

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  • Pleurotus eryngii-based photo-thermal conversion material and preparation method thereof
  • Pleurotus eryngii-based photo-thermal conversion material and preparation method thereof
  • Pleurotus eryngii-based photo-thermal conversion material and preparation method thereof

Examples

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Effect test

preparation example Construction

[0030] A preparation method of Pleurotus eryngii-based light-to-heat conversion material provided by the invention comprises the following steps:

[0031] S1. Ultrasonic cleaning the Pleurotus eryngii mushrooms cut into preset columns with deionized water, take out and remove the surface moisture, then freeze at -20~-5℃ for 6~24h, and then transfer to -80~-20 The temperature is ℃ and the vacuum environment is frozen for 48 to 96 hours to obtain the pretreated Pleurotus eryngii.

[0032] The cut Pleurotus eryngii is placed in the environment of -20~-5℃ and frozen for 6~24 hours. The reason is that -20℃ is enough to freeze the water in the Pleurotus eryngii. Too low a temperature wastes a lot of energy. When the temperature is higher than At -5°C, the freezing rate is slow. The freezing time is selected to be 6-24 hours. When the time is higher than 24 hours, the Pleurotus eryngii has been completely frozen, resulting in high energy consumption; when the time is lower than 6 ho...

Embodiment 1

[0046] A Pleurotus eryngii-based light-to-heat conversion material, prepared by the following steps:

[0047] S1. Pretreatment of Pleurotus eryngii

[0048] Soak fresh Pleurotus eryngii in deionized water and put it into an ultrasonic cleaner, use 80Hz frequency ultrasonic cleaning for 60 minutes, wipe off the moisture on the surface of Pleurotus eryngii with absorbent paper, and then cut Pleurotus eryngii into cylinders or cuboids Or cube, the cut Pleurotus eryngii is frozen in -20℃ environment for 6h, the frozen Pleurotus eryngii is placed in a vacuum of 10Pa, and the temperature is -80℃ for 96h, and the pretreated Pleurotus eryngii can be obtained by taking it out mushroom.

[0049] Wherein, the mass ratio of deionized water used for soaking Pleurotus eryngii and Pleurotus eryngii is 5:1, and the diameter of cylinder is 5cm, and height is 8cm, and the high direction is the growth direction of Pleurotus eryngii.

[0050] S2. Preparation of dopamine hydrochloride reaction s...

Embodiment 2-5 and comparative example 1-3

[0057] Compared with Example 1, the Pleurotus eryngii-based photothermal conversion materials provided in Examples 2-5 and Comparative Examples 1-3 are different in that in step S1, the freezing temperature and vacuum freezing temperature are shown in Table 1 , and others are substantially the same as those in Embodiment 1, and will not be repeated here.

[0058] The preparation conditions of table 1 embodiment 2-5 and comparative example 1-3

[0059] Test case Freezing temperature (℃) Vacuum freezing temperature (℃) Example 2 -10 -80 Example 3 -5 -80 Example 4 -20 -60 Example 5 -20 -20 Comparative example 1 Not frozen -80 Comparative example 2 -20 Not vacuum frozen Comparative example 3 Not frozen Not vacuum frozen

[0060] In step S1, the freezing treatment of the sample before the vacuum freeze-drying is the premise of the vacuum freeze-drying, if the freezing treatment is not performed, the vacuum freez...

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Abstract

The invention provides a pleurotus eryngii-based photo-thermal conversion material and a preparation method thereof. The preparation method comprises the following steps: cutting pleurotus eryngii according to the growth direction of the pleurotus eryngii, performing vacuum freeze drying, putting the cut pleurotus eryngii into a photothermal conversion material modification reaction solution, reacting for a certain time to enable the photothermal conversion material to be adsorbed on the porous structure and the surface of the pleurotus eryngii, and performing vacuum freeze drying to obtain the pleurotus eryngii-based photothermal conversion material. According to the invention, the dopamine is ingeniously adhered to the surface and pore walls of the pleurotus eryngii by utilizing the super-strong adhesiveness of the dopamine hydrochloride and the porous property of the pleurotus eryngii, so that the photo-thermal conversion material integrating a photo-thermal conversion part, a heat preservation part and a moisture transmission part is obtained. Water can be automatically transported from bottom to top through the wicking effect, heat can be preserved so as to reduce heat loss, and the method has the advantages of being low in cost, easy to operate, capable of being naturally degraded, environmentally friendly and the like.

Description

technical field [0001] The invention relates to the technical field of solar photothermal conversion evaporation, in particular to a Pleurotus eryngii-based photothermal conversion material and a preparation method thereof. Background technique [0002] With the advancement of science and the continuous improvement of the quality of human life, human demand for various resources is also increasing, and the pressure on the environment is also increasing. Energy shortage and environmental pollution are problems that plague the world. The lack of fresh water resources, domestic wastewater, factory wastewater, dye wastewater, etc. are continuously discharged, resulting in less and less water resources that can be directly used by humans. How to use clean energy to treat sewage and avoid secondary pollution is an important solution to the shortage of fresh water resources. research direction. The photothermal conversion material is a material that absorbs the energy of sunlight ...

Claims

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Application Information

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IPC IPC(8): C09K5/14
CPCC09K5/14
Inventor 杨红军汪林锋卞力行庄燕徐卫林顾绍金
Owner WUHAN TEXTILE UNIV
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