Formaldehyde absorbing particles for air purifier and preparation method of formaldehyde absorbing particles

Abstract

The invention discloses a formaldehyde absorbing particles for an air purifier and a preparation method of the formaldehyde absorbing particles. The preparation method comprises the following steps: mixing high chlorinated polyethylene and ethidene diamine in a mass ratio of 1:5 and stirring to react; then, washing a reaction product by distilled water; then washing the reaction product by ethanol until the lotion is colorless and transparent; filtering, drying the filter residues and grinding into powder; uniformly mixing the powder and diatomite in a mass ratio of 1:(3-8); and granulating the powder until the particle diameter of particles is 2-3mm, so as to obtain the formaldehyde absorbing particles for the air purifier. The formaldehyde absorbing particles disclosed by the invention have relatively high porosity and specific surface area and formaldehyde in air passing through a filter screen is conveniently contacted with the surfaces of the particles, so that formaldehyde absorbing reaction is facilitated and an aminated polymer in the formaldehyde absorbing particles for the air purifier can form stable Mannich base by virtue of chemical action, so that the concentration of formaldehyde is effectively reduced, and the pollution caused by secondary release is avoided; and the cost is low.

Description

Technical field: [0001] The invention belongs to the field of air purification, and in particular relates to formaldehyde-absorbing particles used in air purifiers and a preparation method thereof. Background technique: [0002] Formaldehyde is defined as carcinogenic and teratogenic shape material by the World Health Organization, is the allergen of generally acknowledging, also is one of potential strong mutagen. [0003] Studies have shown that: formaldehyde has strong carcinogenic and short cancer effects. The lot of documents record, formaldehyde mainly shows aspects such as allotriosmia, stimulation, allergy, abnormal pulmonary function, dysfunction of liver and immunologic dysfunction to health effects. When its concentration reaches 0.06-0.07mg / m3 in every cubic meter of air, children will have mild asthma. When the formaldehyde content in the indoor air is 0.1mg / m3, peculiar smell and sense of discomfort are just arranged; When reaching 0.5mg / m3, can stimulate eye...

AI Technical Summary

Problems solved by technology

[0007] At present, activated carbon and its products are mainly used as solid adsorbents, which only have a strong adsorption effect on non-polar or weakly polar substances, but have a small adsorption capacity for highly polar formaldehyde. It is easy to be released again under certain environmental conditions, causing secondary pollution

Moreover, the price of activated carbon is also relatively high at present, and the price of coconut shell carbon with better quality is above 13,000 yuan / ton, resulting in a higher cost of the filter screen. Therefore, it is necessary to develop a low-cost particle with high absorption efficiency for formaldehyde. The production of formaldehyde filter in the production of air purifier is very necessary