CN112430407B - Material with air purifying and negative ion releasing effects, preparation method thereof and application thereof in coating - Google Patents
Material with air purifying and negative ion releasing effects, preparation method thereof and application thereof in coating Download PDFInfo
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- CN112430407B CN112430407B CN202011273802.1A CN202011273802A CN112430407B CN 112430407 B CN112430407 B CN 112430407B CN 202011273802 A CN202011273802 A CN 202011273802A CN 112430407 B CN112430407 B CN 112430407B
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Abstract
The invention discloses a material with the function of purifying air and releasing negative ions, a preparation method thereof and application thereof in paint, which is prepared from the following raw materials: tourmaline powder, modified titanium dioxide, modified montmorillonite, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan, magnesium oxide and deionized water. The material with the effect of purifying air and releasing negative ions can effectively purify air and release negative ions, and can be widely applied to indoor and outdoor air purification; the tourmaline powder can be added to effectively release negative ions, and the material can effectively improve the absorption of indoor harmful gases and achieve the effect of purifying air by combining physical adsorption, chemical oxidation and photocatalytic degradation through scientific and reasonable proportioning.
Description
Technical Field
The invention relates to the technical field of air purification materials, in particular to a material with an effect of purifying air and releasing negative ions, a preparation method thereof and application thereof in paint.
Background
Indoor furniture, ornaments, household chemicals and the like respectively cause pollution to indoor environments to different degrees. Currently, scientists have detected 500 or more organics from indoor air, with common indoor contaminants being mainly formaldehyde, benzene, toluene, xylenes, ammonia and Total Volatile Organic Compounds (TVOC). These contaminants directly affect the quality of life and physical health of people. Air purification materials in interior wall coating materials are popular and accepted by the market, but how to improve the purification effect of the air purification materials is a problem to be solved.
Chinese patent CN201510776125.8 discloses a bentonite color paint powder with air purifying function, which uses nano titanium dioxide, and specifically illustrates that nano titanium dioxide can generate photocatalytic reaction similar to photosynthesis under the action of light, generate free hydroxyl and active oxygen with extremely strong oxidizing ability, have extremely strong photooxidation-reduction function, can oxidatively decompose various organic compounds and partial inorganic matters, can destroy bacterial cell membranes and solidify viral proteins, can kill bacteria and decompose organic pollutants, and decompose the organic pollutants into pollution-free water and carbon dioxide, thus having extremely strong functions of sterilization, deodorization, mildew prevention, antifouling self-cleaning and air purifying. However, when the used nano titanium dioxide is applied in the coating, the titanium dioxide is only responsive in the ultraviolet light region, which is unfavorable for the application in the inner wall, namely, the photocatalysis can be carried out only under the irradiation of ultraviolet light.
The Chinese paper, "preparation and performance research of natural zeolite supported titanium dioxide photocatalyst" discloses that the TiO 2/zeolite photocatalyst is prepared by using butyl titanate as a titanium source and natural zeolite as a carrier by a sol-gel method, and the prepared TiO2 photocatalyst has a good photocatalytic degradation effect on methyl orange. TiO 2/zeolite photocatalyst with 35% TiO2 load, when the dosage is 2 g/L, the decoloring rate of methyl orange solution can reach 96% after ultraviolet light irradiation for 30 min. It teaches that the natural zeolite supports titanium dioxide, but the titanium dioxide still needs ultraviolet light continuous irradiation to play the role of the titanium dioxide, and cannot be applied to the field of indoor coating, and it does not disclose whether the effect of the supported titanium dioxide on purifying air is improved or not.
The Chinese paper, "research on photocatalytic performance of molecular sieve-loaded titanium dioxide" discloses that a TiO2/A type molecular sieve photocatalyst is synthesized by a sol-gel impregnation method. The surface active site of the A-type molecular sieve is improved by loading TiO2, the photocatalytic activity of a sample is effectively improved, and the degradation rate of the TiO 2-loaded A-type molecular sieve catalyst to RhB reaches 95.4% after ultraviolet light irradiates 2 h. After the ultraviolet light is loaded, ultraviolet light irradiation is needed, the ultraviolet light can not be applied to the field of indoor coatings, and the degradation rate of RhB reaches 95.4%. Nor does it disclose whether the effect of the supported titanium dioxide on purifying air is improved.
Disclosure of Invention
The invention provides a material with an effect of purifying air and releasing negative ions, a preparation method thereof and application thereof in a coating, wherein the material can effectively purify air and has an excellent antibacterial effect.
The invention solves the technical problems by adopting the following technical scheme:
a material with the effect of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 10-20 parts of tourmaline powder, 4-10 parts of modified titanium dioxide, 4-10 parts of modified montmorillonite, 2-6 parts of triple superphosphate powder, 2-5 parts of sodium silicate, 1-4 parts of humic acid, 1-3 parts of lithopone, 0.5-2.5 parts of silica sol, 0.5-2 parts of tea polyphenol, 0.5-1.5 parts of chitosan, 0.5-1.5 parts of magnesium oxide and 45-70 parts of deionized water.
As a most preferable scheme, the material with the effect of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 12 parts of tourmaline powder, 7 parts of modified titanium dioxide, 6 parts of modified montmorillonite, 5 parts of heavy calcium carbonate powder, 3 parts of sodium silicate, 2 parts of humic acid, 1.5 parts of lithopone, 1.5 parts of silica sol, 1.2 parts of tea polyphenol, 1 part of chitosan, 0.8 part of magnesium oxide and 60 parts of deionized water.
As a preferred scheme, the preparation method of the modified titanium dioxide comprises the following steps:
adding 1-4 parts of titanium dioxide into 40-60 parts of absolute ethyl alcohol, and stirring for 30-60 minutes at a rotating speed of 60-100 rpm to obtain a suspension;
adding 1-4 parts of zeolite into 20-40 parts of hydrochloric acid solution, stirring at 60-80 ℃ and 60-100 rpm for 100-150 min, filtering, and drying to obtain pretreated zeolite;
and adding 1-4 parts of pretreated zeolite into 5-15 parts of suspension, adding 0.05-0.15 part of octadecyltrimethoxysilane, heating to 60-90 ℃, stirring at 60-100 rpm for 100-200 min, filtering, drying, and grinding to 100-300 meshes to obtain the modified titanium dioxide.
Under the action of illumination or ultraviolet light, the titanium dioxide can generate active oxygen and hydroxyl with extremely strong oxidizing ability to decompose the polluted gas of formaldehyde into water and carbon dioxide, thereby achieving the aim of purifying air and being an optimal raw material for purifying air.
When the titanium dioxide is applied in the coating, the titanium dioxide only responds in the ultraviolet light region, so that the titanium dioxide is unfavorable for the application in the inner wall, namely, the photocatalysis activity of the titanium dioxide can be carried out only under the irradiation of ultraviolet light, and the photo-generated electron-hole pair of the pure titanium dioxide is easy to recombine, so that the pure nano titanium dioxide needs to be modified, and the photocatalysis activity of the titanium dioxide can be carried out under the irradiation of sunlight and indoor light.
According to the invention, titanium dioxide is tightly combined with the zeolite subjected to acidification treatment, the zeolite has a special pore structure and has ion exchange, selective adsorption and catalytic reaction activities, so that the combination of photo-generated electrons and holes can be obviously inhibited, the specific surface area of photocatalysis can be increased, the photocatalysis efficiency can be effectively improved, the effect on air purification can be improved, and the zeolite can be widely applied to the field of indoor decoration.
The applicant of the invention finds that the titanium dioxide modified by zeolite in a large number of research centers, although the photocatalysis efficiency is obviously improved, the titanium dioxide can be applied to the field of interior decoration, the obtained modified titanium dioxide is difficult to disperse in a paint formula and an aqueous solution, and can generate an agglomeration phenomenon, so that the application of the modified titanium dioxide is seriously influenced, and therefore, how to solve the problem of dispersing the modified titanium dioxide becomes a new problem facing the inventor.
As a preferred embodiment, the hydrochloric acid solution has a molar concentration of 4mol/L.
As a preferable scheme, the preparation method of the modified montmorillonite is characterized in that:
adding 1-4 parts of montmorillonite into 20-50 parts of deionized water, and stirring at a rotating speed of 60-100 rpm for 80-150 min to obtain a suspension;
adding 1-4 parts of sepiolite into 30-60 parts of nitric acid solution, and stirring at the speed of 80-150 rpm for 50-80 min at the temperature of 70-95 ℃ to obtain a mixed solution;
and (3) dripping 0.5-2 parts of the mixed solution into 10-20 parts of the suspension, performing ultrasonic treatment for 25-40 min, filtering, drying, and grinding to 100-300 meshes to obtain the modified montmorillonite.
The applicant of the present invention found in a great deal of researches that interlayer lattices are cracked by modifying montmorillonite, interlayer spacing of montmorillonite is enlarged, specific surface area of montmorillonite is increased, and adsorption effect of montmorillonite is remarkably increased.
The applicant of the invention surprisingly found that the modified montmorillonite obtained by modification has good suspension performance and dispersibility in aqueous solution, and can effectively adjust the leveling performance of the aqueous solution (or paint formula), so that the problem of dispersibility of the modified titanium dioxide in the aqueous solution (or paint formula) can be effectively solved, and the modified montmorillonite and the modified titanium dioxide have good synergistic effect.
As a preferable mode, the molar concentration of the nitric acid is 1.5-2.5 mol/L.
As a preferable scheme, the ultrasonic power is 400-800W.
The invention also provides a preparation method of the material with the effect of purifying air and releasing negative ions, which comprises the following steps:
(1) Adding the modified titanium dioxide, the modified montmorillonite and the deionized water into a mixer, and stirring for 6-10 min at a rotating speed of 200-400 rpm;
(2) Adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at 600-1000 rpm for 8-15 min to obtain a mixed solution;
(3) Filtering the mixed solution, and drying to obtain the material with the effect of purifying air and releasing negative ions.
As a preferable scheme, the step (1) specifically comprises: adding the modified titanium dioxide, the modified montmorillonite and the deionized water into a mixer, and stirring for 8min at a rotating speed of 300 rpm.
The invention also provides application of the material with the function of purifying air and releasing negative ions in the paint.
The invention has the beneficial effects that: (1) The material with the effect of purifying air and releasing negative ions can effectively purify air and release negative ions, and can be widely applied to indoor and outdoor air purification; (2) The tourmaline powder is added into the material to effectively release negative ions, and physical adsorption, chemical oxidation and photocatalytic degradation are combined through scientific and reasonable proportion, so that the absorption of indoor harmful gas can be effectively improved, and the effect of purifying air is achieved; (3) The invention combines titanium dioxide and zeolite after acidification, the zeolite has special pore canal structure and ion exchange, selective adsorption and catalytic reaction activity, can obviously inhibit the recombination of photo-generated electrons and holes, increase the specific surface area of photocatalysis, can effectively improve the photocatalysis efficiency, improves the effect on air purification, and can be widely applied to the field of indoor decoration; the interlayer lattice is cracked by modifying the montmorillonite, so that the interlayer spacing of the montmorillonite is enlarged, the specific surface area of the montmorillonite is increased, and the adsorption effect of the montmorillonite is obviously improved; the modified montmorillonite obtained through modification has good suspension performance and dispersibility in aqueous solution, and can effectively adjust the leveling performance of the aqueous solution (or a paint formula), so that the dispersibility problem of the modified titanium dioxide in the aqueous solution (or the paint formula) can be effectively solved, the modified montmorillonite and the modified titanium dioxide have good synergistic effect, and the modified titanium dioxide and the modified montmorillonite can have synergistic effect in the aspect of purifying air; (4) The material has obvious antibacterial effect, wherein the modified titanium dioxide and the modified montmorillonite can obviously improve the antibacterial effect.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The term "parts" is defined as parts by weight unless specifically stated otherwise.
Example 1
A material with the effect of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 12 parts of tourmaline powder, 7 parts of modified titanium dioxide, 6 parts of modified montmorillonite, 5 parts of heavy calcium carbonate powder, 3 parts of sodium silicate, 2 parts of humic acid, 1.5 parts of lithopone, 1.5 parts of silica sol, 1.2 parts of tea polyphenol, 1 part of chitosan, 0.8 part of magnesium oxide and 60 parts of deionized water.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring for 50min at a speed of 80rpm to obtain a suspension;
adding 2 parts of zeolite into 38 parts of hydrochloric acid solution, stirring at the speed of 80rpm for 100-150 min at the temperature of 75 ℃, filtering and drying to obtain pretreated zeolite;
adding 2 parts of pretreated zeolite into 13 parts of suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4mol/L.
The preparation method of the modified montmorillonite comprises the following steps:
adding 2 parts of montmorillonite into 48 parts of deionized water, and stirring at 80rpm for 100min to obtain a suspension;
adding 2 parts of sepiolite into 38 parts of nitric acid solution, and stirring at a speed of 120rpm for 70min at 85 ℃ to obtain a mixed solution;
dripping 1 part of the mixed solution into 14 parts of the suspension, performing ultrasonic treatment for 30min, filtering, drying, and grinding to 200 meshes to obtain the modified montmorillonite.
The molar concentration of nitric acid is 2mol/L.
The ultrasonic power is 500W.
The preparation method of the material with the effect of purifying air and releasing negative ions comprises the following steps:
(1) Adding the modified titanium dioxide, the modified montmorillonite and the deionized water into a mixer, and stirring for 8min at a rotating speed of 300 rpm;
(2) Adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at 800rpm for 12min to obtain a mixed solution;
(3) Filtering the mixed solution, and drying to obtain the material with the effect of purifying air and releasing negative ions.
Example 2
A material with the effect of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 10 parts of tourmaline powder, 4 parts of modified titanium dioxide, 4 parts of modified montmorillonite, 2 parts of coarse whiting powder, 2 parts of sodium silicate, 1 part of humic acid, 1 part of lithopone, 0.5 part of silica sol, 0.5 part of tea polyphenol, 0.5 part of chitosan, 0.5 part of magnesium oxide and 45 parts of deionized water.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring for 50min at a speed of 80rpm to obtain a suspension;
adding 2 parts of zeolite into 38 parts of hydrochloric acid solution, stirring at the speed of 80rpm for 100-150 min at the temperature of 75 ℃, filtering and drying to obtain pretreated zeolite;
adding 2 parts of pretreated zeolite into 13 parts of suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4mol/L.
The preparation method of the modified montmorillonite comprises the following steps:
adding 2 parts of montmorillonite into 48 parts of deionized water, and stirring at 80rpm for 100min to obtain a suspension;
adding 2 parts of sepiolite into 38 parts of nitric acid solution, and stirring at a speed of 120rpm for 70min at 85 ℃ to obtain a mixed solution;
dripping 1 part of the mixed solution into 14 parts of the suspension, performing ultrasonic treatment for 30min, filtering, drying, and grinding to 200 meshes to obtain the modified montmorillonite.
The molar concentration of nitric acid is 2mol/L.
The ultrasonic power is 500W.
The preparation method of the material with the effect of purifying air and releasing negative ions comprises the following steps:
(1) Adding the modified titanium dioxide, the modified montmorillonite and the deionized water into a mixer, and stirring for 8min at a rotating speed of 300 rpm;
(2) Adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at 800rpm for 12min to obtain a mixed solution;
(3) Filtering the mixed solution, and drying to obtain the material with the effect of purifying air and releasing negative ions.
Example 3
A material with the effect of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 20 parts of tourmaline powder, 10 parts of modified titanium dioxide, 10 parts of modified montmorillonite, 6 parts of heavy calcium powder, 5 parts of sodium silicate, 4 parts of humic acid, 3 parts of lithopone, 2.5 parts of silica sol, 2 parts of tea polyphenol, 1.5 parts of chitosan, 1.5 parts of magnesium oxide and 70 parts of deionized water.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring for 50min at a speed of 80rpm to obtain a suspension;
adding 2 parts of zeolite into 38 parts of hydrochloric acid solution, stirring at the speed of 80rpm for 100-150 min at the temperature of 75 ℃, filtering and drying to obtain pretreated zeolite;
adding 2 parts of pretreated zeolite into 13 parts of suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4mol/L.
The preparation method of the modified montmorillonite comprises the following steps:
adding 2 parts of montmorillonite into 48 parts of deionized water, and stirring at 80rpm for 100min to obtain a suspension;
adding 2 parts of sepiolite into 38 parts of nitric acid solution, and stirring at a speed of 120rpm for 70min at 85 ℃ to obtain a mixed solution;
dripping 1 part of the mixed solution into 14 parts of the suspension, performing ultrasonic treatment for 30min, filtering, drying, and grinding to 200 meshes to obtain the modified montmorillonite.
The molar concentration of nitric acid is 2mol/L.
The ultrasonic power is 500W.
The preparation method of the material with the effect of purifying air and releasing negative ions comprises the following steps:
(1) Adding the modified titanium dioxide, the modified montmorillonite and the deionized water into a mixer, and stirring for 8min at a rotating speed of 300 rpm;
(2) Adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at 800rpm for 12min to obtain a mixed solution;
(3) Filtering the mixed solution, and drying to obtain the material with the effect of purifying air and releasing negative ions.
Example 4
The material with the effect of purifying air and releasing negative ions is characterized by being prepared from the following raw materials in parts by weight: 15 parts of tourmaline powder, 8 parts of modified titanium dioxide, 6 parts of modified montmorillonite, 3 parts of triple superphosphate powder, 3 parts of sodium silicate, 2 parts of humic acid, 1.5 parts of lithopone, 1 part of silica sol, 1 part of tea polyphenol, 0.8 part of chitosan, 0.7 part of magnesium oxide and 58 parts of deionized water.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring for 50min at a speed of 80rpm to obtain a suspension;
adding 2 parts of zeolite into 38 parts of hydrochloric acid solution, stirring at the speed of 80rpm for 100-150 min at the temperature of 75 ℃, filtering and drying to obtain pretreated zeolite;
adding 2 parts of pretreated zeolite into 13 parts of suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4mol/L.
The preparation method of the modified montmorillonite comprises the following steps:
adding 2 parts of montmorillonite into 48 parts of deionized water, and stirring at 80rpm for 100min to obtain a suspension;
adding 2 parts of sepiolite into 38 parts of nitric acid solution, and stirring at a speed of 120rpm for 70min at 85 ℃ to obtain a mixed solution;
dripping 1 part of the mixed solution into 14 parts of the suspension, performing ultrasonic treatment for 30min, filtering, drying, and grinding to 200 meshes to obtain the modified montmorillonite.
The molar concentration of nitric acid is 2mol/L.
The ultrasonic power is 500W.
The preparation method of the material with the effect of purifying air and releasing negative ions comprises the following steps:
(1) Adding the modified titanium dioxide, the modified montmorillonite and the deionized water into a mixer, and stirring for 8min at a rotating speed of 300 rpm;
(2) Adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at 800rpm for 12min to obtain a mixed solution;
(3) Filtering the mixed solution, and drying to obtain the material with the effect of purifying air and releasing negative ions.
Comparative example 1
Comparative example 1 differs from example 1 in that comparative example 1 does not contain modified titanium dioxide, all other things being equal.
Comparative example 2
Comparative example 2 differs from example 1 in that comparative example 2 replaces the modified titanium dioxide with titanium dioxide, all other things being equal.
Comparative example 3
Comparative example 3 is different from example 1 in that the modified titanium dioxide described in comparative example 3 is produced by a method different from example 1, and the other are the same.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring for 50min at a speed of 80rpm to obtain a suspension;
adding 2 parts of diatomite into 38 parts of hydrochloric acid solution, stirring at the speed of 80rpm for 100-150 min at the temperature of 75 ℃, filtering, and drying to obtain pretreated diatomite;
2 parts of pretreated diatomite is added into 13 parts of suspension, then 0.1 part of octadecyltrimethoxysilane is added, the mixture is heated to 75 ℃, stirred for 120min at 80rpm, filtered, dried and ground to 200 meshes, and the modified titanium dioxide is obtained.
The molar concentration of the hydrochloric acid solution is 4mol/L.
Comparative example 4
Comparative example 4 differs from example 1 in that the modified titanium dioxide was produced by the same method as described above.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring for 50min at a speed of 80rpm to obtain a suspension;
adding 2 parts of zeolite into 13 parts of suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4mol/L.
Comparative example 5
Comparative example 5 differs from example 1 in that comparative example 5 does not contain modified montmorillonite, all other things being equal.
Comparative example 6
Comparative example 6 differs from example 1 in that comparative example 6 replaces the modified montmorillonite with montmorillonite, all the other things being equal.
Comparative example 7
Comparative example 7 is different from example 1 in that the preparation method of the modified montmorillonite described in comparative example 7 is different from example 1, and the other are the same.
The preparation method of the modified montmorillonite comprises the following steps:
adding 2 parts of montmorillonite into 48 parts of deionized water, and stirring at 80rpm for 100min to obtain a suspension;
adding 2 parts of chitosan into 38 parts of nitric acid solution, and stirring at a speed of 120rpm at 85 ℃ for 70min to obtain a mixed solution;
dripping 1 part of the mixed solution into 14 parts of the suspension, performing ultrasonic treatment for 30min, filtering, drying, and grinding to 200 meshes to obtain the modified montmorillonite.
The molar concentration of nitric acid is 2mol/L.
The ultrasonic power is 500W.
The ultrasonic power is 500W.
Comparative example 8
Comparative example 8 differs from example 1 in that comparative example 8 does not contain modified titanium dioxide, modified montmorillonite, and is otherwise identical.
To further demonstrate the effect of the present invention, the following test methods were provided:
1. the detection method comprises the following steps: taking 12 materials with the same size and 10m volume 3 And air cleaning materials (per m) prepared in examples 1 to 4 and comparative examples 1 to 8 were placed 3 Uniformly placing 10 g); placing smoke generator in the sealed boxes, opening to generate smoke to make PM2.5 concentration in each sealed box be 6.0 μg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the After 3 hours, the PM2.5 concentration in each box was measured, and the removal rate was calculated, and the specific results are shown in Table 1.
2. The detection method comprises the following steps: equal mass of the air cleaning materials of examples 1 to 4 and comparative examples 1 to 8 were placed at 1m, respectively 3 (per m) 3 Uniformly placing 10 g) on the inner wall of an environment test cabin, filling equivalent smoke into the environment test cabin through a smoke generator, purifying the smoke filled into the test cabin, and testing the initial concentration of the pollutants respectively as formaldehyde and toluene, wherein the initial concentration of the pollutants is 100mg/L, analyzing the concentration of the pollutants by using a gas chromatograph after 20 minutes, and calculating the purification rate, wherein the test result is shown in table 1.
Table 1 test results
As can be seen from Table 1, the material provided by the invention has a good air purifying effect, and can effectively remove PM2.5, formaldehyde and toluene.
As can be seen from comparative examples 1-4, different formulation ratios can affect the removal of PM2.5, formaldehyde, toluene, wherein example 1 is the optimal ratio.
As can be seen from comparative examples 1 and 1-2, the modified titanium dioxide according to the invention can significantly improve the removal of PM2.5, formaldehyde and toluene, and if the modified titanium dioxide is replaced by titanium dioxide, the removal of PM2.5, formaldehyde and toluene is significantly reduced.
Comparative example 1 and comparative examples 3 and 4 show that the production process of the modified titanium dioxide according to the present invention, if it is replaced, significantly reduces the removal of PM2.5, formaldehyde and toluene.
As can be seen from comparative examples 1 and 5-6, the modified montmorillonite provided by the invention can significantly improve the removal of PM2.5, formaldehyde and toluene, and if the modified montmorillonite is replaced by montmorillonite, the removal of PM2.5, formaldehyde and toluene can be significantly reduced.
Comparative examples 1 and 7 show that the preparation of the modified montmorillonite in the present invention, if replaced, significantly reduces the removal of PM2.5, formaldehyde and toluene.
Comparative example 1 and comparative example 8 show that the modified montmorillonite and the modified titanium dioxide according to the invention have a synergistic effect in the removal of PM2.5, formaldehyde and toluene.
The modified montmorillonite obtained by modification has good suspension property and dispersibility in aqueous solution, and can effectively adjust the leveling property of the aqueous solution (or paint formula), so that the dispersibility problem of the modified titanium dioxide in the aqueous solution (or paint formula) can be effectively solved, and the modified montmorillonite and the paint formula have good synergistic effect when being combined.
3. The amount of negative ions released was measured by the method described in JCT 1016-2006 method for measuring negative ion generation amount, and the measurement results are shown in Table 2.
TABLE 2 negative ion Release test results
As can be seen from Table 2, the materials of the present invention can effectively release negative ions, and comparative examples 1 to 4 show that different ratios can affect the release amount of negative ions, wherein example 1 is the optimal ratio.
4. The antibacterial rate was tested according to the standard QB/T2591-2003 of the light industry of China. The strain used in the experiment: the test results of staphylococcus aureus and escherichia coli are shown in table 3.
TABLE 3 antibacterial test results
As can be seen from table 1, the materials according to the present invention have an antibacterial effect.
As can be seen from comparative examples 1-4, different formulations can affect the antibacterial effect, wherein example 1 is the optimal formulation.
As can be seen from comparative examples 1 and 1 to 2, the modified titanium dioxide of the present invention can significantly improve the antibacterial effect, and if titanium dioxide is used instead of the modified titanium dioxide, the antibacterial effect is significantly reduced.
Comparative example 1 and comparative examples 3 and 4 show that the antibacterial activity of the modified titanium dioxide according to the present invention is significantly reduced when the modified titanium dioxide is replaced.
As can be seen from comparative examples 1 and 5 to 6, the modified montmorillonite of the present invention can significantly improve the antibacterial effect, and if the modified montmorillonite is replaced with montmorillonite, the antibacterial effect is significantly reduced.
Comparative examples 1 and 7 show that the antibacterial effect of the modified montmorillonite is significantly reduced when the preparation method of the modified montmorillonite is replaced.
Comparative example 1 and comparative example 8 show that the modified montmorillonite and the modified titanium dioxide according to the invention have a synergistic effect in terms of antibacterial activity.
The modified montmorillonite obtained by modification has good suspension property and dispersibility in aqueous solution, and can effectively adjust the leveling property of the aqueous solution (or paint formula), so that the dispersibility problem of the modified titanium dioxide in the aqueous solution (or paint formula) can be effectively solved, and the modified montmorillonite and the paint formula have good synergistic effect when being combined.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of the claims.
Claims (8)
1. The material with the effect of purifying air and releasing negative ions is characterized by being prepared from the following raw materials in parts by weight: 10-20 parts of tourmaline powder, 4-10 parts of modified titanium dioxide, 4-10 parts of modified montmorillonite, 2-6 parts of triple superphosphate powder, 2-5 parts of sodium silicate, 1-4 parts of humic acid, 1-3 parts of lithopone, 0.5-2.5 parts of silica sol, 0.5-2 parts of tea polyphenol, 0.5-1.5 parts of chitosan, 0.5-1.5 parts of magnesium oxide and 45-70 parts of deionized water;
the preparation method of the modified titanium dioxide comprises the following steps:
adding 1-4 parts of titanium dioxide into 40-60 parts of absolute ethyl alcohol, and stirring for 30-60 minutes at a rotating speed of 60-100 rpm to obtain a suspension;
adding 1-4 parts of zeolite into 20-40 parts of hydrochloric acid solution, stirring at 60-80 ℃ and 60-100 rpm for 100-150 min, filtering, and drying to obtain pretreated zeolite;
adding 1-4 parts of pretreated zeolite into 5-15 parts of suspension, adding 0.05-0.15 part of octadecyltrimethoxysilane, heating to 60-90 ℃, stirring at 60-100 rpm for 100-200 min, filtering, drying, and grinding to 100-300 meshes to obtain modified titanium dioxide;
the preparation method of the modified montmorillonite comprises the following steps:
adding 1-4 parts of montmorillonite into 20-50 parts of deionized water, and stirring at a rotating speed of 60-100 rpm for 80-150 min to obtain a suspension;
adding 1-4 parts of sepiolite into 30-60 parts of nitric acid solution, and stirring at the speed of 80-150 rpm for 50-80 min at the temperature of 70-95 ℃ to obtain a mixed solution;
and (3) dripping 0.5-2 parts of the mixed solution into 10-20 parts of the suspension, performing ultrasonic treatment for 25-40 min, filtering, drying, and grinding to 100-300 meshes to obtain the modified montmorillonite.
2. The material with the effect of purifying air and releasing negative ions according to claim 1, wherein the material with the effect of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 12 parts of tourmaline powder, 7 parts of modified titanium dioxide, 6 parts of modified montmorillonite, 5 parts of heavy calcium carbonate powder, 3 parts of sodium silicate, 2 parts of humic acid, 1.5 parts of lithopone, 1.5 parts of silica sol, 1.2 parts of tea polyphenol, 1 part of chitosan, 0.8 part of magnesium oxide and 60 parts of deionized water.
3. The material with the negative ion releasing function for purifying air according to claim 1, wherein the molar concentration of the hydrochloric acid solution is 4mol/L.
4. The material with the effect of purifying air to release negative ions according to claim 1, wherein the molar concentration of nitric acid is 1.5-2.5 mol/L.
5. The material with the effect of purifying air to release negative ions according to claim 1, wherein the ultrasonic power is 400-800 w.
6. The method for preparing the material with the effect of purifying air and releasing negative ions according to any one of claims 1 to 5, which is characterized by comprising the following steps:
(1) Adding the modified titanium dioxide, the modified montmorillonite and the deionized water into a mixer, and stirring for 6-10 min at a rotating speed of 200-400 rpm;
(2) Adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at 600-1000 rpm for 8-15 min to obtain a mixed solution;
(3) Filtering the mixed solution, and drying to obtain the material with the effect of purifying air and releasing negative ions.
7. The method for preparing a material with negative ion releasing function for purifying air according to claim 6, wherein the step (1) specifically comprises: adding the modified titanium dioxide, the modified montmorillonite and the deionized water into a mixer, and stirring for 8min at a rotating speed of 300 rpm.
8. The application of the material with the function of purifying air and releasing negative ions in the paint.
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| CN116288870B (en) * | 2023-03-25 | 2024-01-16 | 常州市林克制衣有限公司 | Negative ion fiber blended flame-retardant garment fabric and preparation method thereof |
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