CN104017419A

CN104017419A - Method for preparing silicon dioxide and zinc oxide composite material

Info

Publication number: CN104017419A
Application number: CN201310721162.XA
Authority: CN
Inventors: 韦先飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-24
Filing date: 2013-12-24
Publication date: 2014-09-03

Abstract

The invention discloses a method for preparing a silicon dioxide and zinc oxide composite material. The method comprises the following steps: firstly, adding urea or an ammonia solution into a zinc nitrate solution, zinc acetate solution or zinc sulfate solution, mixing uniformly, reacting for 8-12 hours at the constant temperature of 70-95 DEG C, then, filtrating, drying and calcining, so as to obtain nano zinc oxide; adding water to the obtained nano zinc oxide, so as to prepare a solution, enabling the solution to react with a sodium silicate solution, filtrating, drying and calcining, thereby obtaining the silicon dioxide and zinc oxide composite material. By applying the composite material to the preparation of dry-powder latex paint, the prepared dry-powder latex paint can efficiently decompose harmful gases, such as formaldehyde, toluene and the like, in air, so as to improve the quality of indoor air, and can exert a long-term bactericidal effect Instead of the traditional bactericides.

Description

The preparation method of silicon-dioxide and zinc oxide composite

Technical field

The invention belongs to field of compound material, the preparation method of especially a kind of silicon-dioxide and zinc oxide composite.

Background technology

According to related data statistics, the people of the nearly half in the whole world lives in the room air of pollution, and indoor environmental pollution has caused 35.7% respiratory tract disease, 22% chronic lung disease and 15% trachitis, bronchitis and lung cancer.The investigation of international related organization is found, in the air in the buildings of the more than 30% newly-built or reconstruction in the whole world, all has the healthy disadvantageous objectionable impurities to people, and room air pollution has been put into one of 5 environmental factorss that public health is had the greatest impact.Wherein formaldehyde is typical pollutant matter, and therefore, people solve serious Formaldehyde Pollution of Indoor Air problem in the urgent need to a kind of safe and permanently effective method.

Summary of the invention

The invention provides a kind of silicon-dioxide and zinc oxide composite, by this matrix material for the preparation of dry powder emulsion paint coating, and by the dry powder emulsion paint coating making as indoor wall coating, can solve serious Formaldehyde Pollution of Indoor Air problem.

For solving the problems of the technologies described above, the technical solution adopted in the present invention is:

The preparation process of a kind of silicon-dioxide and zinc oxide composite comprises the following steps:

A, to containing 0.1mol/LZn ²⁺salts solution in add precipitation agent, mix then isothermal reaction 8 hours～12 hours at 70 DEG C～95 DEG C; Wherein, described precipitation agent is the one in the ammonia soln of 0.4mol/L urea soln or 25%～28%, and the volume ratio of described salts solution and described urea soln is 1:0.5～1; The volume ratio of described salts solution and described ammoniacal liquor is 1:0.1～0.3;

B, after reaction described in steps A finishes, product that described reaction is obtained filters, and collects filter residue I; Described filter residue I is first dried to 2 hours～10 hours at 75 DEG C, then calcines 4 hours at 350 DEG C～550 DEG C, obtain intermediate product;

C, the intermediate product that step B is obtained add water and be mixed with massfraction is 30% solution, then be the sodium silicate solution of 0.05mol/L to adding concentration in described solution, mix, and regulate its pH value to 8.5, standing and reacting 3 hours, then in described sodium silicate solution, drip dehydrated alcohol, no longer include Precipitation to reacting; Wherein, the volume ratio of the aqueous solution of described sodium silicate solution and described intermediate product is 1:0.2～0.5;

D, after reaction described in step C finishes, product that described reaction is obtained filters, and collects filter residue II, by described filter residue II first 95 DEG C dry 8 hours, then 350 DEG C～550 DEG C calcinings 4 hours, obtain this silicon-dioxide and zinc oxide composite.

In technique scheme, technical scheme is more specifically: described salts solution is zinc nitrate solution, zinc acetate solution, the one in three kinds of solution of solution of zinc sulfate.

Owing to adopting technique scheme, the beneficial effect that the present invention obtains is:

The silicon-dioxide that the present invention is made and zinc oxide composite are for the preparation of in dry powder emulsion paint coating, the dry powder emulsion paint coating that it makes not only can efficiently decompose the obnoxious flavoures such as airborne formaldehyde and toluene, improve IAQ (indoor air quality), can also replace traditional sterilant to play the effect of long-acting bactericidal: antibacterial effect reaches more than 98%; Daylight or light-illuminating are after 48 hours, and decomposing, purifying formaldehyde rate reaches more than 83%, and decomposing, purifying toluene rate reaches more than 49%; Meet the requirement of the building material industry standard JC/T 1074-2008 of the People's Republic of China (PRC) " function of purifying indoor air coating material purifying property ".

Embodiment

Below in conjunction with specific examples, the invention will be further described:

embodiment 1

To the urea soln that adds the 0.4mol/L of 100mL in the zinc nitrate solution of the 0.1mol/L of 200mL, both are mixed, then isothermal reaction 12 hours at 70 DEG C, after question response finishes, the product that reaction is obtained filters, and collects filter residue; Filter residue I is first dried to 2 hours at 75 DEG C, then at 350 DEG C, calcines 4 hours, obtain nano zine oxide; Then nano zine oxide being added water and being mixed with massfraction is 30% solution, is then the sodium silicate solution of 0.05mol/L to adding 600mL concentration in described solution; Mix, and regulate its pH value to 8.5, standing and reacting 3 hours, then in described sodium silicate solution, drip dehydrated alcohol, no longer include Precipitation to reacting, the product that reaction is obtained filters, collect filter residue II, described filter residue II is first dried to 8 hours at 95 DEG C, then 350 DEG C of calcinings 4 hours, obtains this silicon-dioxide and zinc oxide composite.

The silicon-dioxide that the present invention is made and zinc oxide composite are for the preparation of dry powder emulsion paint coating, and add 150 grams of water by every square metre with 100 grams of dry emulsion powder coatings and stir, be coated on indoor wall, after film-forming, detect, find without under light conditions the adsorbable indoor formaldehyde of this coating, toluene and peculiar smell; After having daylight or light according to 48 hours, antibacterial effect to bacterium common in room air reaches 98.5%, can decomposing, purifying formaldehyde rate reach 85.3%, decomposing, purifying toluene rate reaches 52.5%, meets the requirement of the building material industry standard JC/T 1074-2008 of the People's Republic of China (PRC) " function of purifying indoor air coating material purifying property ".

embodiment 2

To the urea soln that adds the 0.4mol/L of 150mL in the 0.1mol/L zinc nitrate solution of 200mL, both are mixed, then isothermal reaction 10 hours at 80 DEG C, after question response finishes, the product that reaction is obtained filters, and collects filter residue; Filter residue I is first dried to 6 hours at 75 DEG C, then at 450 DEG C, calcines 4 hours, obtain nano zine oxide; Then nano zine oxide being added water and being mixed with massfraction is 30% solution, is then the sodium silicate solution of 0.05mol/L to adding 1200mL concentration in described solution; Mix, and regulate its pH value to 8.5, standing and reacting 3 hours then drips dehydrated alcohol in described sodium silicate solution, no longer includes Precipitation to reacting; The product that reaction is obtained filters, and collects filter residue II, and described filter residue II is first dried to 8 hours at 95 DEG C, then 450 DEG C of calcinings 4 hours, obtains this silicon-dioxide and zinc oxide composite.

The silicon-dioxide that the present invention is made and zinc oxide composite are for the preparation of dry powder emulsion paint coating, and add 150 grams of water by every square metre with 100 grams of dry emulsion powder coatings and stir, be coated on indoor wall, film-forming, detect, find without under light conditions the adsorbable indoor formaldehyde of this coating, toluene and peculiar smell; After having daylight or light according to 48 hours, antibacterial effect to bacterium common in room air reaches 98.3%, can decomposing, purifying formaldehyde rate reach 86.1%, decomposing, purifying toluene rate reaches 51.7%, meets the requirement of the building material industry standard JC/T 1074-2008 of the People's Republic of China (PRC) " function of purifying indoor air coating material purifying property ".

embodiment 3

To the urea soln that adds the 0.4mol/L of 200mL in the 0.1mol/L zinc nitrate solution of 200mL, both are mixed, then isothermal reaction 12 hours at 95 DEG C, after question response finishes, the product that reaction is obtained filters, and collects filter residue; Filter residue I is first dried to 2 hours at 75 DEG C, then at 550 DEG C, calcines 4 hours, obtain nano zine oxide; Then nano zine oxide being added water and being mixed with massfraction is 30% solution, is then the sodium silicate solution of 0.05mol/L to adding 2000mL concentration in described solution; Mix, and regulate its pH value to 8.5, standing and reacting 3 hours then drips dehydrated alcohol in described sodium silicate solution, no longer includes Precipitation to reacting; The product that reaction is obtained filters, and collects filter residue II, and described filter residue II is first dried to 8 hours at 95 DEG C, then 550 DEG C of calcinings 4 hours, obtains this silicon-dioxide and zinc oxide composite.

The silicon-dioxide that the present invention is made and zinc oxide composite are for the preparation of dry powder emulsion paint coating, and add 150 grams of water by every square metre with 100 grams of dry emulsion powder coatings and stir, be coated on indoor wall, film-forming, detect, find without under light conditions the adsorbable indoor formaldehyde of this coating, toluene and peculiar smell; After having daylight or light according to 48 hours, antibacterial effect to bacterium common in room air reaches 98.1%, can decomposing, purifying formaldehyde rate reach 85.4%, decomposing, purifying toluene rate reaches 52.8%, meets the requirement of the building material industry standard JC/T 1074-2008 of the People's Republic of China (PRC) " function of purifying indoor air coating material purifying property ".

Claims

1. a preparation method for silicon-dioxide and zinc oxide composite, is characterized in that comprising the following steps:

A, to containing 0.1mol/L Zn ²⁺salts solution in add precipitation agent, mix then isothermal reaction 8 hours～12 hours at 70 DEG C～95 DEG C; Wherein, described precipitation agent is the one in the ammonia soln of 0.4mol/L urea soln or 25%～28%, and the volume ratio of described salts solution and described urea soln is 1:0.5～1; The volume ratio of described salts solution and described ammoniacal liquor is 1:0.1～0.3;

C, the intermediate product that step B is obtained add water and be mixed with massfraction is 30% solution, is then the sodium silicate solution of 0.05mol/L to adding concentration in described solution; Wherein, the volume ratio of the aqueous solution of described sodium silicate solution and described intermediate product is 1:0.2～0.5; Mix, and regulate its pH value to 8.5, standing and reacting 3 hours then drips dehydrated alcohol in described sodium silicate solution, no longer includes Precipitation to reacting;

2. the preparation method of a kind of silicon-dioxide according to claim 1 and zinc oxide composite, is characterized in that described salts solution is zinc nitrate solution, zinc acetate solution, the one in three kinds of solution of solution of zinc sulfate.