Shell-based air purifying material and preparation method thereof

Abstract

The invention discloses a shell-based air purifying material and a preparation method thereof. Raw materials include 100 parts of shell powder, 60-80 parts of calcium chloride dihydrate, 30-40 parts of ammonia water with the concentration of 20%, 180-250 parts of hydrogen peroxide with the concentration of 30%, 20-80 parts of gypsum-based gelatinization powder and 50-180 parts of water. The preparation method comprises the following steps: carrying out pretreatment, in-situ reaction and combination to obtain a powdery material with an air purifying function; adding 0.1-3.5 parts of a reinforcing filler and 0.1-73 parts of a hydration liquid-phase medium into the powdery material, then moulding, drying, maintaining, and then carrying out finishing treatment, so that powdered granulated, shaped granular or plate-shaped shell-based air purifying material is obtained. The preparation method disclosed by the invention has the advantages that the in-situ reaction is carried out on the shell powder, so that micro-scale calcium peroxide is produced in porous channels of the shell powder, the shell powder has the capability of directly oxidizing and decomposing harmful gases such as formaldehyde, the problems that an existing air purifying material is low in purification rate and poor in purification persistence are solved, and functionality and decorativeness such as self humidity control, antibacterial and mouldproof properties, fire resistance, noninflammability, sound absorption and noise reduction can be achieved.

Description

technical field [0001] The invention relates to a shell-based air purification material and a preparation method thereof, belonging to the technical field of green ecological environment building materials. Background technique [0002] Air purification materials absorb and decompose harmful substances in the air through physical and chemical methods. The application of air purification materials is an effective way to control air pollution sources. At present, indoor air purification materials and technologies mainly include the following categories: (1) Porous media represented by activated carbon, diatom pure, nano-mineral crystals, clay, molecular sieves, etc., mainly adsorb, but the amount of adsorption is often limited. When the temperature and humidity change, it will also cause desorption; (2) One or more of HEPA, activated carbon (modified activated carbon), photocatalyst, negative ions, etc. are used to form an air purification filter element (filter membrane) for ...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a shell-based air purification material for the deficiencies in the prior art. By reacting shell powder in situ, micron-scale calcium peroxide can be produced in the pores of the shell powder. The ability to directly oxidize and decompose harmful gases such as formaldehyde solves the low purification rate and poor purification durability of existing air purification materials, and can simultaneously obtain the unique self-humidity adjustment, antibacterial and mildew-proof, fire-resistant and non-combustible properties of shell powder and gypsum materials. Functional and decorative functions such as sound absorption and noise reduction

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