Formaldehyde adsorption material and preparation method thereof

Abstract

The invention discloses a formaldehyde adsorption material which is prepared from the following raw materials in percentage by weight: 5-15 percent of tannin, 10-20 percent of collagen fibers, 1-5 percent of a cross-linking agent, 2-10 percent of chitosan, 0.1-3 percent of a penetrating agent, 0.3-3.2 percent of a surfactant, 0.15-1.0 percent of a pH regulator and the balance of water, wherein the tannin is formed by mixing one or more of persimmon tannin or diospyros lotus tannin according to any ratio; and the surfactant refers to one of stearic acid and sodium dodecyl benzene sulfonate. The formaldehyde adsorption material disclosed by the invention has the beneficial effects that the preparation process is simple, good in adsorptive action, convenient to use and low in cost, the added chitosan and tannin can carry out a great reaction with formaldehyde, the formaldehyde gas can be deeply eliminated, and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of indoor air purification, in particular to a formaldehyde-adsorbing material and a preparation method thereof. Background technique [0002] Formaldehyde is a colorless, irritating gas with a strong odor, and its 35%~40% aqueous solution is commonly known as formalin. Formaldehyde is a protoplasmic poison, which can be combined with protein. After inhaling high-concentration formaldehyde, severe irritation and edema of the respiratory tract, eye stinging, headache, and bronchial asthma may occur. Direct skin contact with formaldehyde can cause dermatitis, stains, and necrosis. Frequent inhalation of a small amount of formaldehyde can cause chronic poisoning, mucous membrane hyperemia, skin irritation, allergic dermatitis keratosis and fragility, nail bed finger pain, long-term inhalation by pregnant women may lead to newborn baby deformities, and even death, long-term inhalation by men can cause male Spe...

AI Technical Summary

Problems solved by technology

The third is a product that uses the principle of photocatalysis. Some catalysts are coated on the adsorption material, and formaldehyde is oxidized by sunlight and oxygen in the air. Photocatalysts currently on the market are such products, and the treatment cost per square meter is about 20 yuan. , the price is more expensive

The fourth is the plant method. Many plants have the function of absorbing harmful gases such as formaldehyde, such as Chlorophytum, Sansevieria, Ivy, Aloe, etc., to convert formaldehyde into other substances, but this absorption is not stable and the processing speed is relatively slow

The above materials and methods all have a certain effect on removing formaldehyde, but there are still limitations such as easy adsorption saturation, poor regeneration, and high cost of use.