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Photothermal conversion element and application of polydopamine

A technology for photothermal conversion and polydopamine, which is applied in the field of photoconversion, can solve the problems of low sunlight absorption, low thermal conversion ability, difficult preparation, etc., and achieves the effects of good biocompatibility, low cost of raw materials, and simple preparation.

Active Publication Date: 2017-06-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reported materials with photothermal conversion effects include carbon nanotubes, graphene, ferroferric oxide, gold nanoparticles, etc., all of which have many limitations in current research and future practical applications, such as difficult preparation, cost, etc. High, with certain biological toxicity and other issues
And some materials have low absorption of sunlight or low heat conversion ability

Method used

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  • Photothermal conversion element and application of polydopamine
  • Photothermal conversion element and application of polydopamine
  • Photothermal conversion element and application of polydopamine

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Dissolve dopamine hydrochloride and trishydroxymethylaminomethane in water, stir for a period of time, and wait for the aqueous solution to become pure black, soak the absorbent cotton in the black aqueous solution, shake or slowly stir for a period of time, until the absorbent cotton is completely black, and obtain polydopamine compound absorbent cotton. Rinse polydopamine composite absorbent cotton twice with tap water, dry or air dry naturally. By weighing before and after compounding, the mass percentage of polydopamine in the polydopamine composite absorbent cotton is about 1% to 3%.

[0058] see Figure 5 , the polydopamine composite absorbent cotton of embodiment 1 is placed in the irradiation of simulated sunlight, and the light intensity is equivalent to the light intensity of a sun (about 100mW / cm 2 ), and real-time monitoring of the surface temperature with an infrared thermal imager. After 20 seconds of light exposure, the highest temperature on the surfa...

Embodiment 2

[0061] The light-to-heat conversion element was prepared in the same manner as in Example 1, except that the absorbent cotton was replaced with polymer plastic.

[0062] see Figure 7 , the polydopamine composite polymer plastic of Example 2 was placed under simulated sunlight, and the light intensity was equivalent to the light intensity of one sun, and the surface temperature was monitored in real time with an infrared thermal imager. After 20 seconds of light exposure, the highest temperature on the surface of the polydopamine composite absorbent cotton was about 65°C.

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Abstract

The invention provides a photothermal conversion element comprising polydopamine converting sunlight into heat energy. The invention further provides an application of the polydopamine. The polydopamine is used for the photothermal conversion element and converts the sunlight into the heat energy. The photothermal conversion element can be widely used in the field of solar energy development and utilization, such as a seawater desalination device, a solution purification device, a sewage water treatment device, a water heater, a dryer, a solar stove, a heating furnace, a photothermal power generation device or a light response shape memory device.

Description

technical field [0001] The invention relates to the field of light conversion, in particular to a light-to-heat conversion element and the application of polydopamine. Background technique [0002] Energy shortage is a major problem faced by mankind for a long time, and it is also an important factor restricting my country's economic development. The development of new energy, especially the development of clean energy is an important theme in today's era. As a clean energy source, solar energy has the following characteristics: 1) Solar energy is the most abundant energy that can be developed and utilized by human beings, and it is inexhaustible; 2) The sun shines all over the earth and can be developed and Utilization, no transportation problem; 3) solar energy, as a clean energy source, will not pollute the environment and affect the ecology when it is developed and utilized. The utilization of solar energy mainly includes photothermal conversion, photochemical conversi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/48
CPCF24S70/10Y02A20/142Y02E10/40
Inventor 吉岩危岩李振
Owner TSINGHUA UNIV
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