A carbonized rice husk foam photothermal material and its preparation method

A technology of carbonizing rice husk and foam slurry, which is applied in the field of light-to-heat conversion, can solve problems such as no technical report on carbonized rice husk foam, achieve high water evaporation efficiency and light-to-heat conversion efficiency, promote transmission, and simple preparation process Effect

Inactive Publication Date: 2020-11-17
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Carbonized rice husk is a biomass relic material with a wide range of sources. Its natural micropore and nanopore structure, high carbon content (30-40wt%) and wide light absorption range (ultraviolet-near infrared light region) endow It has great research prospects as a new type of biomass photothermal material, but there is no technical report on using carbonized rice husk foam as a photothermal material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A carbonized rice husk foam photothermal material and a preparation method thereof. The preparation method described in this embodiment is:

[0025] Step 1. Add 2 to 4 parts by mass of carbonized rice husk to 100 parts by mass of deionized water, mix well to obtain a suspension; then add 2 to 2.3 parts by mass of dodecyl to the suspension Sodium sulfonate, 2 to 2.3 parts by mass of dodecanol, and 2 to 2.3 parts by mass of resin glue are stirred at 40 to 56° C. and 100 to 200 r / min for 10 to 16 minutes to obtain a mixed solution.

[0026] Step 2. Under the condition of rotating speed of 1500~2000r / min, stir the mixture for 15~18min, then add 3~6 parts by mass of binding agent to the mixture under stirring, continue to stir for 5~8min to obtain Carbonized rice husk foam slurry.

[0027] Step 3: Pouring the carbonized rice husk foam slurry into a shape, freeze-drying for 6-8 hours, and then drying at 80-90°C for 18-20 hours to prepare a carbonized rice husk foam photothermal ma...

Embodiment 2

[0030] A carbonized rice husk foam photothermal material and a preparation method thereof. The preparation method described in this embodiment is:

[0031] Step 1. Add 4-6 parts by mass of carbonized rice husk to 100 parts by mass of deionized water, mix uniformly to obtain a suspension; then add 2.1-2.4 parts by mass of dodecyl to the suspension Sodium sulfonate, 2.1-2.4 parts by mass of dodecanol and 2.1-2.4 parts by mass of resin glue are stirred at 42-58°C and 100-200 r / min for 12-18 minutes to obtain a mixed solution.

[0032] Step 2. Under the condition of rotating speed of 1500~2000r / min, stir the mixture for 16~19min, then add 6-9 parts by mass of binding agent to the mixture under stirring, and continue to stir for 6-9min to obtain Carbonized rice husk foam slurry.

[0033] Step 3: Pouring the carbonized rice husk foam slurry into a shape, freeze-drying for 8-10 hours, and then drying at 80-90°C for 20-22 hours to prepare a carbonized rice husk foam photothermal material. ...

Embodiment 3

[0036] A carbonized rice husk foam photothermal material and a preparation method thereof. The preparation method described in this embodiment is:

[0037] Step 1. Add 6-8 parts by mass of carbonized rice husk to 100 parts by mass of deionized water, mix uniformly to obtain a suspension; then add 2.2-2.5 parts by mass of dodecyl to the suspension Sodium sulfonate, 2.2-2.5 parts by mass of dodecanol and 2.2-2.5 parts by mass of resin glue are stirred at 44-60° C. and 100-200 r / min for 14-20 minutes to obtain a mixed solution.

[0038] Step 2. Under the condition of rotating speed of 1500~2000r / min, stir the mixture for 17~20min, then add 9~12 parts by mass of binding agent to the mixture under stirring, and continue to stir for 7~10min to obtain Carbonized rice husk foam slurry.

[0039] Step 3: Pouring the carbonized rice husk foam slurry into a shape, freeze-drying for 10-12 hours, and then drying at 80-90°C for 22-24 hours to prepare a carbonized rice husk foam photothermal mater...

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Abstract

The invention relates to a charred rice husk foam photothermal material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: adding 2 to 8 parts of charred rice husks by mass into 100 parts of de-ionized water by mass and uniformly mixing; adding 2 to 2.5 parts of sodium dodecyl benzenesulfonate by mass, 2 to 2.5 parts of dodecanol by mass and 2 to 2.5 parts of resin glue by mass; stirring for 10 to 20min under the conditions that the temperature is 40 to 60 DEG C and the rotary speed is 100 to 200r / min, so as to obtain a mixed solution; stirring the mixed solution for 15 to 20min under the condition that the rotary speed is 1500 to 2000r / min; then adding 3 to 12 parts of a binding agent by mass into the stirred mixed solution; continually stirring for 5 to 10min to obtain charred rice husk foam slurry; pouring and molding the charred rice husk foam slurry and freezing and drying for 6 to 12h; and drying for 18 to 24h under the condition that the temperature is 80 to 100 DEG C to prepare the charred rice husk foam photothermal material. The preparation method provided by the invention has a simple technology andlow cost; and the prepared charred rice husk foam photothermal material has high water evaporation efficiency and photothermal conversion efficiency.

Description

Technical field [0001] The invention belongs to the technical field of photothermal conversion. Specifically, it relates to a carbonized rice husk foam photothermal material and a preparation method thereof. Background technique [0002] The photothermal conversion technology refers to the process in which the crystal lattice and photon energy of the photothermal conversion material vibrate with each other under the sunlight, the molecular vibration is intensified, the internal energy increases, and the temperature of the material increases, thereby converting light energy into heat energy. In the field of photothermal conversion technology, the solar steam generation system (Solar Steam Generation) is currently a very promising research direction. It mainly uses porous photothermal materials to greatly absorb solar energy and converts solar energy into heat energy, thereby realizing water vapor Evaporate quickly and efficiently. Biomass remnant materials have the advantages of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L29/04C08L101/00C08K13/04C08K7/26C08K7/24C08K5/42C08K5/05
CPCC08L29/04C08L63/00C08L101/00C08K13/04C08K7/26C08K7/24C08K5/42C08K5/05
Inventor 方伟赵雷陈晓东沈悦陈辉何漩李薇馨
Owner WUHAN UNIV OF SCI & TECH
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