Macromolecular formaldehyde absorbent containing trivalent silver ions and preparation method of macromolecular formaldehyde absorbent

Abstract

The invention provides a macromolecular formaldehyde absorbent containing trivalent silver ions and a preparation method of the macromolecular formaldehyde absorbent. The macromolecular formaldehyde absorbent containing the trivalent silver ions is prepared by mixing the following components by weight percent: 0.6-1.2wt% of polyamide, 0.1-0.6wt% of a promoter, 0.1-1.0wt% of a catalyst, 1.0-5.0wt% of a dispersant, 0.1-0.2wt% of a pH regulator, 10-20wt% of a trivalent silver ion solution and the balance of water. The preparation method comprises the following steps: step I, weighing the components; step II, adding the polyamide, the promoter, the catalyst and the dispersant in water to be dissolved to obtain a solution A; and step III, adding the trivalent silver ion solution in the solution A to obtain a solution B, and regulating a pH value to 8-9 to finish the preparation of the macromolecular formaldehyde absorbent containing the trivalent silver ions. The macromolecular formaldehyde absorbent is good in stability, high in molecular weight and not liable to volatilize or lose; and the trivalent silver ions and the polyamide are combined to have a synergistic effect, so that the macromolecular formaldehyde absorbent purifies an indoor space and is simple in preparation method.

Description

technical field [0001] The invention relates to the field of air purification, in particular to a polymer formaldehyde absorbent containing trivalent silver ions and a preparation method thereof. Background technique [0002] Formaldehyde is one of the most serious sources of indoor pollution, which seriously endangers human health. Its carcinogenicity and teratogenicity have been clearly defined by the World Health Organization, and it ranks second on the priority list of toxic chemicals in my country. According to statistics, within half a year after interior decoration, formaldehyde exceeds the standard by 80% in living rooms, and nearly 100% in conference halls and office spaces; and it still reaches more than 50% within three years. The release time of formaldehyde in the partition is as long as 3-15 years. It can be seen that the long-term excessive indoor formaldehyde concentration has become an invisible killer affecting human health. [0003] Formaldehyde in indoo...

AI Technical Summary

Problems solved by technology

For example, the adsorption of activated carbon is limited by the adsorption activity and its own adsorption capacity; the negative ion generator has strict requirements on the equipment, and it is easy to cause secondary pollution; while the natural green plants have a long time to act and interact slowly.

Low-temperature plasma technology is not suitable for home use, with great efficacy and serious secondary pollution

[0005] Formaldehyde absorbent is an important means of removing formaldehyde in current practical applications. At present, low-molecular-weight compounds such as melamine, dicyandiamide, and ethyl acetoacetate are commonly used as formaldehyde absorbents; however, such low-molecular-weight formaldehyde absorbents have high volatility. , which is neither safe, environmentally friendly nor long-term, and is easy to hydrolyze, releasing acetone, carbon dioxide, etc., which poses a safety hazard