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Paper-surface plasterboard for quickly and efficiently removing methyl aldehyde and preparation method thereof

A gypsum board and gypsum board technology, applied in ceramic products, other household appliances, sustainable waste treatment, etc., can solve the problems of unsatisfactory purification effect and harsh photocatalyst reaction conditions, and achieve the effect of low cost

Inactive Publication Date: 2009-10-07
BEIJING NEW BUILDING MATERIALS PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the harsh reaction conditions of the photocatalyst, visible light and ultraviolet radiation are required, and the purification effect for some dark and humid environments is not very ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] ① Weigh each component of the formaldehyde elimination liquid ingredients: 550 parts of distilled water, 70 parts of acetic acid, 10 parts of formic acid, 170 parts of urea, 30 parts of dicyandiamide, 30 parts of ammonium sulfate, 0.05 parts of polyacrylamide, 0.5 parts of ethyl acetate share;

[0034] ②Weigh each component of the batching of gypsum board: 100 parts of natural plaster powder, 0.5 part of modified starch, 0.8 part of wood fiber, 70 parts of water, 0.06 part of foaming agent (sodium dodecylsulfonate), 0.06 part of formaldehyde 2 parts of elimination solution (weigh after preparation according to the following method);

[0035] ③ Formaldehyde elimination solution preparation steps:

[0036] Add all the formic acid, acetic acid, urea, dicyandiamide and half of the water into the reactor, heat to 95°C, and react to PH=6.0~6.5; add the remaining water, ammonium sulfate and polyacrylamide, and heat Keep it warm for 30-40 minutes; lower the temperature to bel...

Embodiment 2

[0042] ①Weigh the components of the formaldehyde elimination solution: 586 parts of deionized water, 80 parts of phosphoric acid, 20 parts of citric acid, 240 parts of urea, 30 parts of melamine, 20 parts of ammonium sulfate, 20 parts of ammonium chloride, 10 parts of sodium, 0.5 parts of modified polyacrylamide, 1.9 parts of ethyl acetate;

[0043] 2. Take each component of the batching of gypsum board: 100 parts of natural plaster powder, 1 part of modified starch, wood fiber, 1.1 parts, 72 parts of water, 0.09 part of foaming agent (sodium dodecylsulfonate), 3 parts of formaldehyde elimination solution (weigh after preparation according to the following method);

[0044] ③ Formaldehyde elimination solution preparation steps:

[0045] Add all the phosphoric acid, citric acid, urea, melamine and half of the water in the raw material into the reactor, heat to 95°C, and react to PH=6.0~6.5; add the remaining water, ammonium sulfate, ammonium chloride, sodium chloride and Modifi...

Embodiment 3

[0051] ① Weigh the components of the formaldehyde elimination solution: 620 parts of distilled water, 45 parts of strawberry acid, 135 parts of acetic acid, 330 parts of urea, 100 parts of heptane acid hydrazide, 40 parts of ammonium sulfate, 20 parts of ammonium phosphate, chlorine 30 parts of potassium chloride, 0.5 parts of polyacrylamide, 3 parts of acetyl ethyl acetate;

[0052] ② Weigh each component of the batching of gypsum board: 100 parts of natural plaster powder, 1.2 parts of modified starch, 1.2 parts of wood fiber, 75 parts of water, 0.1 part of foaming agent (sodium dodecyl sulfonate), 0.1 part of formaldehyde 4 parts of elimination solution (weigh after preparing according to the following method);

[0053] ③ Formaldehyde elimination solution preparation steps:

[0054] Add all the strawberry acid, acetic acid, urea, heptanoic acid hydrazide and half of the water in the raw material to the reactor, heat to 95°C, and react to PH=6.0~6.5; add the remaining water...

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Abstract

The invention discloses a paper-surface plasterboard for quickly and efficiently removing methyl aldehyde, which comprises the following components: 100 parts of calcined gypsum powder, 60-80 parts of clear water, 0.05-0.1 part of foaming agent, 0.5-1.2 parts of modified starch, 0.8-1.6 parts of wood fiber and 2-4 parts of methyl aldehyde elimination agent. The invention also discloses a method for preparing the paper-surface plasterboard for quickly and efficiently removing the methyl aldehyde, which comprises the following steps: (1) weighting the components; (2) putting the calcined gypsum powder and the modified starch in a mixer and separately and uniformly stirring the clear water, the wood fibers and the methyl aldehyde elimination agent and adding the clear water, the wood fibers and the methyl aldehyde elimination agent into the mixer; (3) foaming the foaming agent and the compressed air, adding the foaming agent and the compressed air into the mixer and uniformly stirring the components in the mixer; and (4) molding the uniformly stirred mixture by a forming machine and finally hardening and drying the mixture. The invention can quickly and efficiently degrade the methyl aldehyde in an environment without light or with weak light.

Description

technical field [0001] The invention relates to an environment-friendly formula of fast and efficient formaldehyde-removing paper-faced gypsum board and a preparation method thereof. Background technique [0002] Formaldehyde is a highly toxic substance, and it ranks second on the list of priority control of toxic chemicals in my country. 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. According to relevant statistics, 70% of the symptoms of human beings are related to the indoor environment. In my country, 120,000 people die from indoor pollution every year, and more than 90% of children with leukemia suffer from the disease within one year after living in a newly decorated room. [0003] There are two main indoor sources of formaldehyde, one is from the incomplete combustion of fuel and tobacco leaves. The second is from chemical p...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B24/38
CPCC04B2111/00025C04B28/14Y02W30/91C04B18/26C04B24/287C04B24/38C04B38/02C04B2103/0076
Inventor 颜博渊王霞周建中冯菊莲赵金平
Owner BEIJING NEW BUILDING MATERIALS PLC
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