Preparation method of colour development methyl aldehyde adsorption material

Abstract

The invention discloses a method for preparing chromogenic formaldehyde adsorbing materials, comprising the following steps: a, mixing 25ml of polyethylene polyamine polymer with a concentration of 30% and a molecular weight of 8000 and 0.5ml of polyethylene glycol, adding 20ml of deionized water for dilution to prepare a formaldehyde reaction indicator; b, adding 20mg if beta-naphthol indicator, mixing uniformly for standby; c, uniformly spraying the mixing liquid from the step b on the surface of a folded paper filter with the size of 25mm*40mm, then drying at 30 DEG C in vacuum, preparing the chromogenic formaldehyde adsorbing materials. The chromogenic formaldehyde adsorbing material prepared by the invention can quickly, thoroughly and continuously remove formaldehyde pollution in indoor air until the content of the formaldehyde is reduced to safe concentration, are nontoxic, pollution-free, safe and environment-friendly to use, and can intuitively show the reaction degree of the formaldehyde.

Description

technical field [0001] The invention relates to a preparation method of a color-developing formaldehyde adsorption material. The color-developing formaldehyde adsorption material shows the degree of formaldehyde reaction through color change, and is suitable for indoor formaldehyde pollution control. Background technique [0002] With the development of the economy and the improvement of people's living standards, a large number of new houses have been built, and the interior decoration has become more and more exquisite. my country's "Indoor Air Quality Standards" stipulates that the maximum allowable concentration of formaldehyde in the living room is 0.10mg / m 3 , the vast majority of newly renovated homes have indoor formaldehyde concentrations that exceed the standard by several to ten times within 5 to 10 months after the completion of the decoration. Residents usually adopt relatively passive methods such as opening windows for ventilation or waiting for a period of ti...

AI Technical Summary

Problems solved by technology

The patent application number is 03104742.4, and the name is "adsorption and decomposition agent for indoor harmful gas formaldehyde". It discloses a formaldehyde adsorption and decomposition agent that uses methyl yellow, magenta, etc. as indicators to indicate the degree of formaldehyde reaction, but the patent is a liquid preparation. , directly sprayed indoors when used, the effect of removing formaldehyde is limited, and the oxides contained in the liquid will cause secondary pollution