A carbonized rice husk foam photothermal material and its preparation method

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...