A kind of ash batch material with the function of catalytic degradation of formaldehyde and its preparation method

Abstract

The invention discloses an ash batch material with the function of catalyzing and degrading formaldehyde absorption and a preparation method thereof. In parts by weight, the ash material with the function of catalytic degradation of formaldehyde absorption includes the following components: 30-40 parts of inorganic powder, 5-10 parts of gypsum, 1-5 parts of anatase titanium dioxide powder, and 20 parts of polyvinyl alcohol ~40 parts, 40~60 parts of water and 10~20 parts of crosslinking agent, the acid-base regulator is one or more of hydrochloric acid, sodium dihydrogen phosphate, potassium dihydrogen phosphate, sodium carbonate, sodium bicarbonate , the crosslinking agent is selected from at least one of boric acid, borate, glutaraldehyde, and citric acid. The method comprises the following steps: step 1, weighing polyvinyl alcohol and water according to the weight fraction ratio, heating the water to 90° C. to fully dissolve the polyvinyl alcohol; step 2, adjusting the pH value of the polyvinyl alcohol aqueous solution obtained in step 1 to 2- After 3, mix evenly with cross-linking agent, let stand for 24-48 hours, obtain cross-linked polyvinyl alcohol aqueous solution; Step 3, adjust the cross-linked polyvinyl alcohol aqueous solution pH value that step 2 obtains to 7-8; Step 4, put The cross-linked polyvinyl alcohol aqueous solution obtained in step 3 is uniformly mixed with inorganic powder, gypsum, and anatase-shaped titanium dioxide powder to obtain the ash material with the function of catalytically degrading formaldehyde.

Description

technical field [0001] The invention relates to the field of ash-triggering materials, in particular to an ash-triggering material with the function of catalytically degrading formaldehyde. Background technique [0002] Formaldehyde is one of the main organic pollutants that volatilize indoors. It has a serious impact on human health and has the risk of carcinogenesis. Therefore, its removal is very important to improve air quality and human health. In the prior art, limestone materials are generally made by mixing inorganic fillers such as lime with construction glue. Among them, traditional construction glue contains unreacted formaldehyde. In some improved construction glue formulas, urea is added to absorb unreacted formaldehyde. formaldehyde, but it is impossible to absorb free formaldehyde in the air released by indoor furniture, curtains and other objects. On the market, anatase-type titanium dioxide powder is used to catalyze the degradation of formaldehyde, but due...

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Problems solved by technology

In the prior art, limestone materials are generally made by mixing inorganic fillers such as lime with construction glue. Among them, traditional construction glue contains unreacted formaldehyde. In some improved construction glue formulas, urea is added to absorb unreacted formaldehyde. formaldehyde, but it is impossible to absorb free formaldehyde in the air released by indoor furniture, curtains and other objects

On the market, anatase-type titanium dioxide powder is used to catalyze the degradation of formaldehyde, but due to the use of fluorocarbon emulsion with poor air permeability and water absorption, the anatase-type titanium dioxide powder cannot fully contact with the air, and, resulting in The efficiency of catalytic degradation is not high (patent application number: 201520061816.1)

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