CN110922835A - Composite material for removing formaldehyde and preparation method thereof - Google Patents

Abstract

The invention relates to a composite material for removing formaldehyde and a preparation method thereof. The composite material for removing formaldehyde comprises the following raw materials in parts by weight: 1-10 parts of plant essential oil; 5-20 parts of negative ion inducing source minerals; 0.5 to 2 parts of rosin; 500-600 parts of resin emulsion; 3-10 parts of porous silica gel or molecular sieve; 15-25 parts of a film-forming assistant; 3-8 parts of polyacrylic acid sodium salt; 1.5-5 parts of waterborne polyether modified siloxane; 5-10 parts of an anti-settling agent; 100-150 parts of titanium dioxide; 150-200 parts of a filler; 100 to 300 portions of water. The inventor of the invention researches an antibacterial composite material for removing formaldehyde through continuous experiments, on one hand, the induction quantity and the retention rate of negative ions are improved, and on the other hand, the composite material has high formaldehyde purification rate and still has high formaldehyde purification rate after being weathered for 1000 hours.

Description

Composite material for removing formaldehyde and preparation method thereof

Technical Field

The invention relates to the technical field of materials, in particular to a composite material for removing formaldehyde and a preparation method thereof.

Background

With the development of human civilization, especially after the second industrial revolution, the acceleration of industrialization and urbanization processes, the problem of human living environment pollution is increasingly prominent, especially with the common application of industrial decoration materials. A large amount of chemical decoration materials and chemical building materials enter a room, the use of household appliances, the tight closing of doors and windows and other problems cause rare indoor air negative ions, and the air negative oxygen ions in the living environment of human beings are increasingly reduced. And most building decoration materials have the problem of formaldehyde release.

Formaldehyde has strong carcinogenic and carcinogenic effects. It is well documented that formaldehyde affects human health primarily in olfactory abnormalities, irritations, allergies, lung dysfunction, liver dysfunction, and immune dysfunction. When the concentration of formaldehyde in the air reaches 0.06-0.07mg/m³When it is used, children can suffer slight asthma; when the formaldehyde content in the indoor air is 0.1mg/m³In time, peculiar smell and uncomfortable feeling are generated; when the formaldehyde content in the indoor air reaches 0.5mg/m³It can stimulate eyes and cause lacrimation; when the formaldehyde content in the indoor air reaches 0.6mg/m³It can cause discomfort or pain in the throat; higher concentrations can cause nausea, vomiting, cough, chest distress, asthma and even pulmonary edema; when the formaldehyde content in the indoor air reaches 30mg/m³Immediately, it will cause death.

The method for increasing the concentration of the indoor negative ions is a common method for providing the negative ions by adding the negative ion inducing material into the composite material, and meanwhile, the negative ions also have certain formaldehyde purification capacity and antibacterial effect. However, the formaldehyde purifying and antibacterial effects of the composite material still need to be improved, researchers usually further add amine antibacterial agents or silver ion antibacterial agents, but the chemical antibacterial agents often have certain toxicity and can generate some unpleasant odor.

Disclosure of Invention

Therefore, it is necessary to provide a formaldehyde-removing composite material and a preparation method thereof, aiming at the problem that the traditional formaldehyde-removing composite material has certain toxicity.

The composite material for removing formaldehyde comprises the following raw materials in parts by mass:

the plant essential oil contains organic chemical substances such as monoterpene, sesquiterpene and diterpene, has antibacterial, antiinflammatory, anticancer and growth hormone secretion promoting effects, and has effects in promoting activity of bronchus and kidney system, inhibiting mental anxiety, promoting metabolism, regulating spirit, relieving fatigue, resisting diseases and strengthening body constitution. The terpene organic chemical substances in the essential oil can promote air ionization to generate abundant negative ions, and particularly, the forest has a great effect of increasing the concentration of the negative ions in the air. The negative ions in the air reach a certain concentration, so that the mood of people can be adjusted, and people can feel fresh, comfortable and pleasant in air; and has the effects of inhibiting, relieving and assisting in treating more than 30 diseases of 7 systems of human bodies, and particularly has more obvious health-care effect on human bodies.

The research also finds that the plant essential oil has the function of removing formaldehyde, and the basic degradation principle is as follows: the functional groups of the effective components in the plant essential oil completely remove formaldehyde in the air by means of oxidative degradation, complexation and the like.

The inventors of the present invention found that: although the plant essential oil has the beneficial effects, the plant essential oil is directly added into the traditional composite material, and due to the problem of the coordination between the negative ion induction source mineral and the plant essential oil, the induction source mineral influences the volatilization of the plant essential oil, and further influences the exertion of the effect of the plant essential oil. Therefore, through continuous experiments, the inventor of the present invention has studied a formaldehyde-removing antibacterial composite material, and by blending plant essential oil, negative ion inducing source mineral, rosin, porous silica gel or molecular sieve, film forming aid, sodium polyacrylate, water-based polyether modified siloxane and other raw materials, on one hand, the negative ion inducing amount and the negative ion retention rate are improved, and on the other hand, the formaldehyde purification rate of the composite material is high, and the formaldehyde purification rate is still high after the composite material is weathered for 1000 hours. Secondly, the stability and the dispersibility of the composite material, the smoothness of the prepared coating, the storage stability and other factors are considered, and the final composite material has excellent comprehensive effect.

In one embodiment, the formaldehyde-removing composite material comprises the following raw materials in parts by mass:

in one embodiment, the formaldehyde-removing composite material comprises the following raw materials in parts by mass:

in one embodiment, the plant essential oil is at least one selected from lavender essential oil, wormwood essential oil, linden flower essential oil, rose essential oil, and peppermint essential oil.

In one embodiment, the negative ion inducing source mineral is at least one selected from quartz, feldspar, tourmaline, mica, monazite and zircon.

In one embodiment, the negative ion induction source minerals are tourmaline and monazite, and the mass ratio of the tourmaline to the monazite is (3-5): 1.

In one embodiment, the sodium polyacrylate salt is a sodium polyacrylate salt modified with maleic anhydride or an unmodified sodium polyacrylate salt.

In one embodiment, the resin emulsion is selected from at least one of a pure acrylic emulsion, a styrene-acrylate copolymer emulsion, a vinyl acetate-vinyl propionate emulsion, and a vinyl chloride-vinylidene chloride emulsion.

In one embodiment, the coalescing agent is selected from at least one of ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol n-butyl ether, and propylene glycol phenyl ether.

The invention provides a preparation method of a formaldehyde-removing composite material, which comprises the following steps:

preparing raw materials of the composite material for removing formaldehyde according to any one item;

mixing and ball-milling a film-forming auxiliary agent, porous silica gel or molecular sieve, negative ion inducing source mineral, rosin and vegetable essential oil until the average particle size is less than 0.6 mu m, grinding titanium dioxide, filler, sodium polyacrylate, waterborne polyether modified siloxane, an anti-settling agent and part of water, and finally adding resin emulsion to blend uniformly to obtain the water-based paint.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings, which illustrate embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The invention provides a formaldehyde-removing composite material which comprises the following raw materials in parts by mass:

the plant essential oil contains organic chemical substances such as monoterpene, sesquiterpene and diterpene, and has antibacterial, antiinflammatory, anticancer and growth hormone secretion promoting effects. The plant essential oil has the function of removing formaldehyde, and the degradation principle is that the functional groups of the effective components in the plant essential oil completely remove the formaldehyde in the air through modes of oxidative degradation, complexation and the like. The dosage of the plant essential oil is 5 to 20 parts, and the dosage is not suitable to be excessive, otherwise, the oil bleaching phenomenon can be caused.

Rosin has an important influence on the retention rate of the negative ion induction amount, the retention rate is reduced when no rosin is added, but the dosage of the rosin is not too large, otherwise the effect of the plant essential oil is influenced.

The film forming assistant also affects the effect of ball milling in the system, when the dosage is less than 15 parts, the overall performance of the composite material can not meet the ideal requirement, and when the dosage is not too large, the film forming effect of the composite material can be affected.

The dosage of the porous silica gel or the molecular sieve is not suitable to be too low, otherwise, the matching effect between the anion-inducing source mineral and the plant essential oil is influenced, but the dosage is not too high, and the composite material is easy to settle.

The amount of the ion-inducing source minerals directly influences the anion inducing amount, the anion inducing amount is small when the amount is too low, the anion inducing amount cannot be further increased when the amount is too high, the radioactivity of the composite material is increased, harm is caused to a human body, and meanwhile the composite material can be settled, so that the final using effect is influenced.

The sodium polyacrylate salt is preferably used in an amount of 3-8 parts, and too small an amount may affect the coating performance of the composite material due to insufficient dispersion stability of the solid particles, but too high an amount may increase the viscosity of the composite material, and even cause demulsification due to large ionic strength.

The waterborne polyether modified siloxane has the functions of leveling and defoaming, the dosage is too low, the defoaming effect is not obvious, the leveling effect is not ideal, and the smoothness and the appearance of the coating of the composite material can be influenced.

The anti-settling agent mainly influences the settling stability of the composite material emulsion, when the using amount is less than 5 parts, the settling stability of the emulsion is extremely poor, the storage period of the product is short, and when the using amount is more than 10 parts, the adhesion effect of a coating film can be influenced.

Further, the composite material for removing formaldehyde comprises the following raw materials in parts by mass:

preferably, the formaldehyde-removing composite material comprises the following raw materials in parts by mass:

preferably, the plant essential oil is at least one selected from lavender essential oil, wormwood essential oil, linden flower essential oil, rose essential oil and mint essential oil.

In one embodiment, the negative ion inducing source mineral is selected from at least one of quartz, feldspar, tourmaline, mica, monazite and zircon.

Preferably, the negative ion inducing source minerals are tourmaline and monazite, and the mass ratio of the tourmaline to the monazite is (3-5): 1.

In one embodiment, the sodium polyacrylate salt is a maleic anhydride modified sodium polyacrylate salt or an unmodified sodium polyacrylate salt.

In one embodiment, the resin emulsion is selected from at least one of a pure acrylic emulsion, a styrene-acrylate copolymer emulsion, a vinyl acetate-vinyl propionate emulsion, and a vinyl chloride-vinylidene chloride emulsion.

In one embodiment, the filler is kaolin or talc; the anti-settling agent is at least one selected from bentonite and polyolefin wax particles.

In one embodiment, the coalescing agent is selected from at least one of ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol n-butyl ether, and propylene glycol phenyl ether.

The composite material for removing formaldehyde can be used for walls such as inner walls, outer walls and the like of buildings, and the composite material is painted on the wall surface.

The inventor of the invention researches a formaldehyde-removing antibacterial composite material through continuous tests, and by matching plant essential oil, negative ion inducing source mineral, rosin, porous silica gel or molecular sieve, film forming auxiliary agent, sodium polyacrylate, waterborne polyether modified siloxane and other raw materials, on one hand, the induction quantity of negative ions and the retention rate of negative ions are improved, and on the other hand, the formaldehyde purification rate of the composite material is higher, and the formaldehyde purification rate is still higher after the composite material is weathered for 1000 hours. Secondly, the stability and the dispersibility of the composite material, the smoothness of the prepared coating, the storage stability and other factors are considered, and finally the composite material has excellent comprehensive effect.

The invention also provides a preparation method of the formaldehyde-removing composite material, which comprises the following steps:

preparing raw materials of the composite material for removing formaldehyde according to any one of the above;

mixing and ball-milling a film-forming auxiliary agent, porous silica gel or molecular sieve, negative ion inducing source mineral, rosin and vegetable essential oil until the average particle size is less than 0.6 mu m, grinding titanium dioxide, filler, sodium polyacrylate, waterborne polyether modified siloxane, an anti-settling agent and part of water, and finally adding resin emulsion to blend uniformly to obtain the water-based paint.

The film forming aid, the porous silica gel or the molecular sieve, the anion inducing source mineral, the rosin and the plant essential oil are ground together, so that the rosin and the lavender essential oil can be uniformly dispersed, the performance of the overall performance of the composition is favorably exerted, and the condition that the dispersion uniformity of the rosin and the lavender essential oil is influenced by the existence of water and further the performance is influenced can be avoided.

The following are specific examples

The raw materials of the formaldehyde-removing composite materials of examples 1 to 4 are shown in table 1:

TABLE 1

Note that ① is polyacrylic acid sodium salt modified by maleic anhydride, and ② is unmodified polyacrylic acid sodium salt.

The preparation method of the formaldehyde-removing composite material of the embodiment 1 to 4 comprises the following steps: according to the formula shown in the table 1, dipropylene glycol monomethyl ether, porous silica gel, ion-inducing source minerals, rosin and lavender essential oil are ground by a ball mill until the average particle size is less than 0.6 micrometer, then titanium dioxide, kaolin, polyacrylic acid sodium salt, waterborne polyether modified siloxane, bentonite and water are added and ground to specified fineness, and finally resin emulsion is added and uniformly blended to obtain the formaldehyde-removing composite material.

Comparative example 1

Comparative example 1 a composite material except for formaldehyde was prepared in substantially the same manner as in example 3 except that the amount of the porous silica gel was 2.5 g.

Comparative example 2

Comparative example 2 a formaldehyde-free composite material was prepared in substantially the same manner as in example 3, except that no rosin was added.

Comparative example 3

Comparative example 3 a formaldehyde-free composite material was prepared in substantially the same manner as in example 3, except that 2.5g of rosin was used.

Comparative example 4

Comparative example 4A composite material except for formaldehyde was prepared in substantially the same manner as in example 3 except that dipropylene glycol monomethyl ether was used in an amount of 14 g.

Comparative example 5

Comparative example 5A formaldehyde-removed composite material was prepared in substantially the same manner as in example 3 except that the amount of the maleic anhydride-modified sodium polyacrylate salt was 2.5 g.

Comparative example 6

Comparative example 6 a formaldehyde-removed composite material was prepared substantially as in example 3, except that lavender essential oil was not added.

Comparative example 7

The preparation method of the composite material except formaldehyde in the comparative example 7 is basically the same as that in the example 4, except that the preparation method comprises the following steps: grinding dipropylene glycol monomethyl ether, porous silica gel, ion-inducing source minerals, rosin, lavender essential oil, titanium dioxide, kaolin, polyacrylic acid sodium salt, waterborne polyether modified siloxane, bentonite and water to specified fineness, and adding resin emulsion to blend uniformly to obtain the formaldehyde-removing composite material.

Negative ion induction amount detection

The formaldehyde-removing composite materials prepared in examples 1-4 and comparative examples 1-7 were coated on a sample plate in the same amount, the sample plate was dried and then placed in the same sealed empty box (made by JC/T1074), the concentration of negative ions in air in the empty box was measured after 3 days, the middle position of the sampling box was measured for 15min, the average value of the measurement was taken as the concentration of negative ions in air in the box, and the amount of induced negative ions was expressed by subtracting the concentration of negative ions in the blank box from the concentration of negative ions in the box.

Weather resistance test

Xenon lamps using a daylight filter were performed according to GB/T1865-2009 "xenon arc radiation filtered by artificial weathering of paints and varnishes and artificial radiation exposure" [ method 1 (artificial weathering) ], the template wetting cycle was in the a mode with a continuous exposure time of 1000 h. (the retention rate of the anion concentration after weathering for 1000 hours is up to 90% and above, and the retention rate below 90% is off-specification)

Formaldehyde purification rate detection

According to JC/T1074 plus 2008 indoor air purification function coating material purification performance, the formaldehyde purification efficiency of the sample is improved

The test results are shown in table 2.

TABLE 2

As can be seen from the data in Table 2, the initial anion-induced amounts of the formaldehyde-removing composite materials of examples 1-6 of the present invention were all 3000/cm³And the retention rate of the negative ion induction amount is qualified after the weather resistance is 1000 hours. And the initial formaldehyde purification rate reaches more than 90 percent, and the formaldehyde purification rate after the weather resistance is 1000 hours can still reach 79 percent or more. The composite material for removing formaldehyde in the comparative example 1 has low content of porous silica gel, so that the matching effect between the negative ion inducing source mineral and the plant essential oil is influenced, and the formaldehyde purification effect is poor. As can be seen from comparative examples 2 and 3, the rosin is not added in the composite material except for formaldehyde, so that the influence on the retention rate of the negative ion induction amount is large, when the rosin content is too large, the effect of the plant essential oil is influenced, and the formaldehyde purification rate is reduced more after the composite material is weathered for 1000 hours. The composite material except formaldehyde of the comparative example 4 contains too little dipropylene glycol monomethyl ether, which affects the ball milling effect, and the overall performance of the composite material can not meet the ideal requirements. The content of the maleic anhydride modified polyacrylic acid sodium salt in the formaldehyde-removing composite material of the comparative example 5 is too low, so that the dispersion stability of the solid particles is insufficient, the coating performance of the composite material can be influenced, and the anion retention rate and the formaldehyde purification rate of the composite material can not meet the requirements. The lavender essential oil is not added into the formaldehyde removing composite material in the comparative example 6, the negative ion induction amount of the composite material meets the requirement, but the formaldehyde purification effect of the composite material is poor.

The rosin and the lavender essential oil can be uniformly dispersed by grinding the dipropylene glycol monomethyl ether, the porous silica gel, the negative ion inducing source mineral, the rosin and the lavender essential oil together, so that the overall performance of the composition is favorably exerted. In contrast, in the preparation method of the composite material except formaldehyde in the comparative example 7, all the raw materials except the acrylic emulsion are ground together, and particularly, the existence of water affects the dispersion uniformity of the rosin and the lavender essential oil, thereby affecting the performance.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The composite material for removing formaldehyde is characterized by comprising the following raw materials in parts by mass:

2. the formaldehyde-removing composite material according to claim 1, which is characterized by comprising the following raw materials in parts by mass:

3. the formaldehyde-removing composite material according to claim 1, which is characterized by comprising the following raw materials in parts by mass:

4. the formaldehyde-removing composite material according to claim 1, wherein the plant essential oil is at least one selected from the group consisting of lavender essential oil, wormwood essential oil, linden flower essential oil, rose essential oil and mint essential oil.

5. The formaldehyde-scavenging composite material according to claim 1, wherein the negative ion-inducing source mineral is at least one selected from quartz, feldspar, tourmaline, mica, monazite and zircon.

6. The formaldehyde-removing composite material according to claim 5, wherein the negative ion-inducing source minerals are tourmaline and monazite, and the mass ratio of the tourmaline to the monazite is (3-5): 1.

7. The formaldehyde-removing composite material as claimed in claim 1, wherein the sodium polyacrylate salt is a sodium polyacrylate salt modified with maleic anhydride or an unmodified sodium polyacrylate salt.

8. The formaldehyde-scavenging composite of claim 1, wherein the resin emulsion is selected from at least one of a acrylic emulsion, a styrene-acrylate copolymer emulsion, a vinyl acetate-vinyl propionate emulsion, and a vinyl chloride-vinylidene chloride emulsion.

9. The formaldehyde-scavenging composite of any one of claims 1 to 8, wherein the coalescent is selected from at least one of ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol n-butyl ether, and propylene glycol phenyl ether.

10. The preparation method of the formaldehyde-removing composite material is characterized by comprising the following steps:

preparing raw materials of the formaldehyde-removing composite material according to any one of claims 1 to 9;

mixing and ball-milling a film-forming auxiliary agent, porous silica gel or molecular sieve, negative ion inducing source mineral, rosin and vegetable essential oil until the average particle size is less than 0.6 mu m, grinding titanium dioxide, filler, sodium polyacrylate, waterborne polyether modified siloxane, an anti-settling agent and part of water, and finally adding resin emulsion to blend uniformly to obtain the water-based paint.