KR20200033813A - Composition with air purification function - Google Patents

Abstract

The present invention relates to a composition with an air purification function, containing calcium chloride, copper chloride, and iron salts in water to have a pH of 4.0 to 8.0, and forming no precipitate at 0 to 80°C to have high liquid stability.

Description

Composition with air purification function {COMPOSITION WITH AIR PURIFICATION FUNCTION}

The present invention relates to a composition having an air purifying function, specifically, to a composition having an air purifying function capable of purifying air by removing volatile organic compounds and odors in the air.

The environment in which we live is a state in which air is contaminated with volatile organic compounds (VOCs; Volatile Organic Compounds, hereinafter referred to as 'VOCs') and various bacteria and fungi.

The volatile organic compounds (VOCs) include benzene, toluene, xylene, and the like, and they can cause mutations and cancer even in very small amounts.

In particular, benzene is a carcinogen and is a substance that induces leukemia and lymphoma. Toluene and xylene are known to cause damage to the kidneys and liver as well as brain dysfunction when habitually inhaled (MOBachmann and JE) Myers, Soc Sci Med 40, 245, 1995) These days, environmentally friendly regulations for these substances are conducted in the United States and Japan by implementing a system called "Pollutant Release and Transfer Register (PRTR)" to release, transfer and register environmental pollutants in the country. By legislation, the EU has been managed through the REACH system, which has been applied since 2004, and our country also manages volatile organic compounds through relevant regulations, but it is also used The countermeasures against Korea are still insufficient.

In addition, air pollution caused by bacteria and fungi causes a lot of unpleasant sensations by generating odors in clothing and interior products that are frequently used in real life.

In addition, recently reported to the media, the sick house syndrome is a serious harm to adults as well as physically resistant children, as harmful substances such as volatile organic compounds are dissipated from building materials such as wallpaper, furniture, flooring, etc. Giving.

Therefore, in recent years, the improvement of air quality has increased the public interest, and this social atmosphere demands environmentally friendly products that are pleasant to the daily necessities as well as comfortable and harmless to the human body.

Various methods have been proposed as a method for treating odors through volatile organic compounds and bacteria, but a post-treatment method by photocatalytic reaction and adsorption has been proposed and utilized. Typical materials include titanium dioxide as a photocatalyst material and activated carbon and charcoal as an adsorbent material. Titanium dioxide is easy to manufacture and stable among the photocatalysts studied to date, and is the most used photocatalyst, and activated carbon shows high organic matter adsorption.

As a conventional technique for purifying such air, by irradiating an electron beam to a titanium dioxide photocatalyst in Korean Patent Publication No. 2011-0073072, the surface of the photocatalyst is modified to absorb light under visible light and to remove volatile organic compounds with increased photoactivity. Catalyst is disclosed, and Korean Patent Publication No. 2011-0072844 discloses a method for removing volatile organic compounds using carbon fibers. However, the titanium dioxide photocatalyst has a low adsorption rate of organic matter, and the activated carbon takes too long to purify the air, so it is difficult to actually see a large effect.

Accordingly, there is an urgent need to develop a composition that can effectively remove volatile organic compounds in the air and quickly remove odors and causes of odors.

The present invention was invented to solve the problems of the prior art as described above, and provides a composition having high stability and a high air purifying function to remove the root cause of odor and suppress the inhabitation of various bacteria. It aims to do.

In addition, an object of the present invention is to provide a composition having an air purifying function capable of imparting an air purifying function to wallpaper and textile products.

In addition, an object of the present invention is to provide a method for preparing a composition having an air purifying function.

The present invention provides a composition having an air purifying function characterized in that the calcium chloride, copper chloride, and iron salts contained in water have a pH of 4.0 to 8.0, and high liquid stability with no precipitate formed at 0 to 80 ° C.

In addition, it provides a composition having an air purification function characterized in that the water contains 1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt.

In addition, it provides a composition having an air purification function, characterized in that the composition further comprises a crosslinking agent.

In addition, the crosslinking agent provides a composition having an air purification function, characterized in that 10 to 20 parts by weight of water is included.

In addition, the present invention is a raw material mixing step of adding 1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt to water; A catalyst mixing step of further adding a catalyst, a pH adjusting agent, and a metal ion blocker to the mixed composition; A reaction step of reacting the catalyst-mixed composition at 40-80 ° C. for 90-150 minutes; It provides a method for producing a composition having an air purifying function, characterized in that it comprises a cooling step of cooling the composition after the reaction is completed.

In addition, the composition has a pH of 4.0 to 8.0, and provides a method for preparing a composition having an air purifying function, characterized in that stability in which no precipitate is formed at 0 to 80 ° C is improved.

As described above, the composition having the air purifying function according to the present invention is a composition formed of an inorganic material, and has high stability of the composition, and thus has excellent air purifying function and deodorizing property without precipitation.

In addition, the composition having the air purifying function of the present invention has the effect of removing the root cause of the odor and suppressing the growth of various bacteria.

In addition, when used in wallpaper and textile products, a composition capable of imparting air purifying and deodorizing properties to a product, which is suitable for wallpaper and textile products.

1 is a process diagram of a method for producing a composition having an air purifying function according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, among the drawings, the same components or parts indicate the same reference numerals as possible. In describing the present invention, detailed descriptions of related known functions or configurations will be omitted so as not to obscure the subject matter of the present invention.

As used herein, the terms 'about', 'substantially', etc. are used in or at a value close to that value when manufacturing and substance tolerances specific to the stated meaning are presented, and the understanding of the invention To aid, accurate or absolute figures are used to prevent unconscionable abusers from unduly using the disclosed disclosure.

The present invention is a composition having an air purifying function including calcium chloride, copper chloride, and iron salt in water, including a raw material mixing step, a catalyst mixing step, a reaction step, and a cooling step as shown in FIG. 1. Is manufactured.

The composition having an air purifying function of the present invention includes 1 to 9% by weight of calcium chloride, 1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt. Add iron salt.

The copper chloride may be monovalent copper (I) chloride, divalent copper chloride, or the like, and it will be preferable to use divalent copper (II) chloride.

The calcium chloride and copper chloride may be used to increase the solubility of water.

When the calcium chloride, copper chloride, and iron salts are added below the content range, air purification performance and deodorant function may be deteriorated. Sediment may occur.

In addition, when the content of copper chloride is high, air purifying and deodorizing functions are high, but yellowing may occur on the composition or sheet containing the composition, so it is necessary to adjust the content depending on the place of use and purpose, and less than 2% by weight It would be desirable to be used as.

Chloride substances, which are compositions having the air purifying function, decompose volatile organic compounds (VOCs) and harmful substances in the air through oxidizing action with Mcl ₂ (M is a transition metal such as Ca, Cu, Fe), which is an active component of multi metal sol. And, it has a mechanism to decompose cell membranes by acting directly on harmful bacteria and disinfecting the electron transport system of harmful bacteria.

In other words, the Mcl ₂ melts the cell membrane of harmful bacteria and works with enzymes in the cell to block the metabolic function of nutrients, that is, the influx and discharge of nutrients, and prevents the breathing function of harmful bacteria, thereby causing intracellular APT (adenosine triphosphate, adenosine triphosphate) It inhibits production, destroys growth stop and regeneration ability, and kills harmful bacteria.

In addition, Mcl ₂ is a strong reactive substance that fundamentally removes harmful gas components by decomposing or changing odor components and neutral odor components into odorless compounds through chemical reactions such as oxidation, reduction and neutralization with basic odor components and neutral odor components. Is done.

[Ammonia decomposition mechanism]

2NH ₃ + H ₂ + Mcl ₂ → 2NH ₄ cl (ammonium chloride) + M

Mcl ₂ is a metal with a very high electropositivity, and causes a reduction reaction that generates hydrogen (H) from water molecules in the air, and reacts with ammonia (2NH ₃ ) gas to make ammonium salt, an odorless ammonium salt, Ammonium Chloride (NH ₄ cl) To remove malodor.

[Formaldehyde decomposition mechanism]

HCHO (formaldehyde) + Mcl ₂ → HCO- ₃ (Bicarbonate) + M + H ₂ ↑

Mcl ₂ causes a reduction reaction that generates hydrogen (H) from water molecules in the air. At this time, it reacts with formaldehyde gas, which is a neutral odor, to convert into bicarbonate (bicarbonate), a harmless component, to decompose HCHO (formaldehyde). Do it.

In the raw material mixing step, glycine may be further added as a buffering agent in order to increase reaction stability in the reaction step.

When adding the glycine, it will be preferable to add 0.5 to 2 parts by weight to 100 parts by weight of water.

In addition, when the composition having the air purifying function of the present invention is manufactured for a fiber product, a crosslinking agent may be added in the raw material mixing step to increase the bonding force between the fiber product and the composition having the air purifying function.

The crosslinking agent may be a silane-based crosslinking agent, and it will be preferable to use Glycidoxy propyl trimethoxy silane.

The crosslinking agent will preferably contain 10 to 20 parts by weight of 100 parts by weight of water.

The catalyst mixing step is a step of further adding a catalyst, a pH adjusting agent, and a metal ion blocker to the composition in which the raw materials are mixed.

In the catalyst mixing step, it may be possible to use imidazole as a catalyst, formic acid as a pH regulator, and EDTA-2Na dihydrate as a metal ion blocker.

The catalyst, pH adjusting agent, and metal ion blocker will preferably add 0.3 to 2 parts by weight to 100 parts by weight of water, respectively.

The reaction step is a step of reacting a composition in which a raw material and a catalyst are mixed at 40 to 80 ° C. for 90 to 150 minutes, and it is important to continuously stir during the reaction so that the composition can stably react.

The cooling step is a step in which the reaction-completed composition is left at room temperature or cooled under low temperature.

After the cooling step, it may be possible to conduct a inspection step of dropping sodium hydroxide and inspecting the amount of precipitates generated.

It is preferable that the composition having the air purifying function of the present invention prepared as described above is formed to have a pH of 4.0 to 8.0. Precipitation may occur when the pH of the composition having the air purifying function of the present invention is less than 4.0 or exceeds 8.0. You can.

The composition having the air purifying function according to the present invention as described above can be diluted with water and sprayed onto a toilet, sink, etc., to provide air purifying function by coating, dipping, etc. on a sheet or ad paper attached to the wallpaper or outside. It can be applied to various products that require deodorization and air purification functions such as pet's toilet pads and toilet sand.

As described above, the composition having the air purifying function of the present invention can impart an air purifying function to a product by various methods such as immersion, coating, spraying, and water, for example, when used in sheet paper or textile products made of paper. It can be applied to the product by diluting it in 1 ~ 5% by weight and immersing it in the condition of pick-up rate 50 ~ 100%, and then heat-treating it at high temperature. You can do it.

Hereinafter, examples of a method for preparing a composition having an air purifying function according to the present invention are shown, but the present invention is not limited to the examples.

▣ Measurement method

For all evaluations, the evaluation composition was added to water to prepare a dilution of 3 ows%, and a nonwoven fabric having a basis weight of 150 gsm, made of 100% polyester fiber, was immersed in the dilution, and then dried sheet paper at 180 ° C. for 100 seconds to prepare a sample. Was evaluated.

 When a control group is required, a nonwoven fabric having a basis weight of 150 gsm of 100% polyester fiber, which is not treated at all, was used as a control, and evaluated in a test environment at a temperature of 20 ° C and a humidity of 65% R.H.

1. Deodorization evaluation

* Measured by the method specified in the SEK mark mark textile product certification standard.

2. Evaluation of removal of volatile organic compounds

(1) Formaldehyde removal evaluation

* Measured through the gas detection tube method, and injected with 20 μg / mL of formaldehyde (HCHO) into a 1000 mL container and measured.

-Test environment: temperature 20 ℃, humidity 65% R.H.

-Removal rate (%) = [(Blank gas concentration-Sample gas concentration) / Blank gas concentration] X100

(2) Other volatile organic compound removal evaluation

* As measured by gas chromatography (GC), a sample of 10 cm X 5 cm is placed in a 500 ml Erlenmeyer flask, sealed with a volatile organic compound whose initial concentration is adjusted, sealed, and sampled in Syringe after 2 hours, followed by GC measurement. Measure the concentration of volatile organic compounds

3. Antibacterial evaluation

* Antibacterial evaluation was performed by measuring Staphylococcus aureus (ATCC 6538) and pneumococcal Klebsiella pneumoniae (ATCC 4352) by measuring the reduction rate of bacterium after 6, 12 and 18 hours incubation.

▣ Preparation of air purifying composition

Examples 1-3

In the raw material mixing step, calcium chloride, copper chloride, and iron salt were added to the water as shown in Table 1 according to the examples, and 12 parts by weight of Glycidoxy propyl trimethoxy silane was added to 100 parts by weight of water as a crosslinking agent.

Calcium chloride hydrate was used as the calcium chloride, and divalent copper (II) chloride hydrate was used as copper chloride.

In the catalyst mixing step, imidazole as a catalyst, formic acid as a pH regulator, and EDTA-2Na dihydrate as a metal ion blocker were further added to the composition in which the raw materials were mixed, and 0.8 parts by weight of 100 parts by weight of water was added.

The reaction step was reacted with stirring at 60 ° C. for 120 minutes, and the reaction was completed and the cooling step of standing at room temperature to prepare a composition having the air purifying function of the present invention. The pH of the prepared composition is shown in Table 1.

division Preparation Example 1 Preparation Example 2 Preparation Example 3 Calcium chloride (% by weight) 7 10 15 Copper chloride dihydrate (% by weight) One 3 9 Iron salt (% by weight) 0.1 One 4 Composition pH 7.0 7.3 7.5

▣ Composition stability evaluation experiment with air purification function

The composition having the air purifying function prepared above was stored in a thermostat at a set temperature for 7 days, and then visually observed to confirm the state of the sediment and shown in Table 2. (X: No sediment, ○: Sediment generation)

Temperature (℃) Preparation Example 1 Preparation Example 2 Preparation Example 3 -One X X ○ 30 X X X 40 X X X 50 X X ○ 60 X X ○ 70 X X ○ 80 X X ○ 90 X ○ ○

As shown in Table 2, in the case of Examples 1 and 2, sediment was not generated in the temperature range of 0 to 80 ° C, but in Example 3, precipitates were generated below 0 ° C or above 50 ° C, and calcium chloride, copper chloride, and iron salts were generated. It can be seen that the stability of the composition is improved when silver is contained in the range of 1 to 9% by weight of calcium chloride dihydrate, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt, respectively.

▣ Deodorization evaluation experiment

Among the examples prepared above, the deodorizing properties of the composition having the air purifying function of Example 2 excellent in liquid stability were evaluated, and the results are shown in Table 3.

division Initial (ppm) 2 hours later (ppm) Decrease rate (%) Hydrogen sulfide gas Example 2 4.0 ≤0.08 98 Control 4.0 3.8 5 Pyridine gas Example 2 12 ≤1.0 91 Control 12 6.9 42.5 Ammonia gas Example 2 100 4.3 95 Control 100 72 28 Acetic acid gas Example 2 30 2.4 92 Control 30 20 33 Trimethylamine gas Example 2 28 0.5 98 Control 28 24 14 Isogilacetic acid gas Example 2 98% reduction after 2 hours Indole gas Example 2 95% reduction after 2 hours Nonenal gas Example 2 94% reduction after 2 hours

As shown in Table 3, the composition having the air purifying function of the present invention has a hydrogen sulfide gas and trimethylamine gas showing a 99% reduction rate, and pyridine gas, ammonia gas, acetic acid gas, isogilacetic acid gas, indole gas, and Nonenal gas are all 90 It can be seen that the deodorizing property is very excellent by showing a reduction rate of% or more.

▣ Experiment for decomposition of volatile organic compounds

1. Measurement of formaldehyde removal rate

It is shown in Table 4 by measuring the formaldehyde removal rate through the control of the air purifying function and the deodorization evaluation experiment prepared above.

time Control Example 30 minutes 0% 78% 60 minutes 0% 92% 90 minutes 4% 95% or more 120 minutes 9% 95% or more

As shown in Table 4, the composition having the air purifying function of the present invention has a very high value compared to the control group, and it can be seen that the formaldehyde removal efficiency is very good at a formaldehyde removal rate of 95% or more after 90 minutes.

2. Measurement of removal rate of other volatile organic compounds

Table 5 shows the removal rate for volatile organic compounds other than formaldehyde through the composition having the air purifying function prepared above and the control group of the deodorization evaluation experiment.

matter Control
(ppb) Example 2
(ppb) 2-Butene 11.5 1.6 Acetonitrile 15.6 2.2 2-Methyl-2-propanol 2.7 0.2 Butanal 0.6 0 2-Butanone 2.7 0.3 Ethyl Acetate 1.5 0.2 Trichloromethane 1.6 0.2 Tetrahydro-Furan 1.1 0.5 2-Cyclopropyl-propane 0.7 0.1 Benzene 0.7 0 1,3,5-Trioxane 13.5 11.1 Methyl-Urea 302.4 0 N, N-Dimethyl-Formamide 8.6 2.5 2,4-Dimethyl-Hexane 2.2 0.5 N, N-Dimethyl-Acetamide 65.2 0.2 o-Xylene 4.0 0.1 Propylene Carbonate 6.2 0 2-Ethyl-1-hexanol 5.2 2.8

As shown in Table 5, the composition having the air purifying function of the present invention has a lower concentration of the volatile organic compound than the control group, and it can be seen that the composition having the air purifying function of the present invention effectively decomposes the volatile organic compound.

◎ Antibacterial evaluation experiment

Among the examples prepared above, the antimicrobial properties of the composition having the air purifying function of Example 2 having excellent liquid stability were evaluated, and the results are shown in Table 6.

Strain Incubation time Example 2 Staphylococcus aureus After 6 hours 77.5% 12 hours later 84.2% 18 hours later 99.9% Pneumococcal After 6 hours 62.2% 12 hours later 83.9% 18 hours later 99.9%

As shown in Table 6, the composition having the air purifying function of the present invention was found to be 99.9% extinct Staphylococcus aureus and pneumococcus after 18 hours, and it was found that the antibacterial property was excellent.

Claims (6)

A composition having an air purifying function characterized in that the calcium chloride, copper chloride, and iron salts contained in water have a pH of 4.0 to 8.0, and a high liquid stability with no precipitate formed at 0 to 80 ° C. According to claim 1,
A composition having an air purifying function, characterized in that the water contains 1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt. According to claim 1,
A composition having an air purifying function, characterized in that the composition further comprises a crosslinking agent. According to claim 3,
The crosslinking agent is a composition having an air purifying function, characterized in that 10 to 20 parts by weight of water is contained in 100 parts by weight. A raw material mixing step of adding 1 to 9% by weight of calcium chloride, 0.1 to 9% by weight of copper chloride, and 0.1 to 3% by weight of iron salt;
A catalyst mixing step of further adding a catalyst, a pH adjusting agent, and a metal ion blocker to the mixed composition;
A reaction step of reacting the catalyst-mixed composition at 40-80 ° C. for 90-150 minutes;
Method for producing a composition having an air purification function, characterized in that it comprises a cooling step of cooling the composition after the reaction is completed. The method of claim 5,
The composition is a pH 4.0 ~ 8.0, 0 to 80 ℃ method for preparing a composition having an air purification function, characterized in that the stability is not formed precipitate is improved.

Images