CN111888882A - Air purification material for removing formaldehyde - Google Patents

Air purification material for removing formaldehyde Download PDF

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CN111888882A
CN111888882A CN202010597584.0A CN202010597584A CN111888882A CN 111888882 A CN111888882 A CN 111888882A CN 202010597584 A CN202010597584 A CN 202010597584A CN 111888882 A CN111888882 A CN 111888882A
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activated carbon
carbon fiber
manganese
modified activated
air purification
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不公告发明人
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Jiaxing Juetuo Technology Co ltd
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    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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Abstract

The invention discloses a formaldehyde-removing air purification material, which belongs to the field of air purification and is prepared from manganese-loaded modified activated carbon fibers, wherein the preparation conditions of the manganese-loaded modified activated carbon fibers are as follows: the active carbon fiber is modified by trimethyl colchicine acid, then dipped in potassium permanganate solution, and finally freeze-dried to obtain the active carbon fiber. The air purification material obtained by the invention has a good formaldehyde removal effect, the formaldehyde removal rate reaches at least 75%, the air purification material has a good water removal effect on air, the moisture absorption is at least 5%, the air circulation is good, and the maximum air pressure drop is 15.6 kPa/g. Therefore, the formaldehyde-removing air purification material has the advantages of high formaldehyde removal effect, good hygroscopicity and good air circulation.

Description

Air purification material for removing formaldehyde
Technical Field
The invention belongs to the field of air purification, and particularly relates to an air purification material for removing formaldehyde.
Background
With the rapid development of global economy, the air quality of partial areas (especially the densely populated areas of developing countries) is rapidly deteriorated, and the ever-occurring air pollution problem seriously harms the health of human beings and the production and life of society. The source treatment and the terminal filtration become main means for treating air pollution in China, and the air purification material becomes an effective way for solving the problem of air pollution by virtue of the advantages of high filtration efficiency, quick effect, easy realization, low cost and the like.
In recent years, researches on indoor air formaldehyde pollution and harm to human bodies caused by room decoration have become a focus of social attention, and a physical adsorption method is commonly used in formaldehyde purification, wherein formaldehyde is adsorbed by Van der Waals force between a material with large porosity and strong adsorption and formaldehyde molecules, but the material is selective, not easy to stabilize and easy to desorb. The porous media such as the activated carbon have the adsorption effect on formaldehyde, the activated carbon has various types, different materials and manufacturing processes, large difference of adsorption capacity on formaldehyde, and limited single-pass efficiency of pure physical adsorption on the removal effect of gas-phase formaldehyde of less than 50%.
Activated Carbon Fibers (ACFs) are developed on the basis of the carbon fiber industry, and have been popular in various countries since the coming out of the world due to the advantages of excellent adsorption performance, wide application, convenience in use and the like. The macroscopic morphology and the microstructure of the ACFs are essentially different from those of the traditional activated carbon, the specific surface area is large, micropores are rich, the pore size is small, the distribution is narrow, the adsorption capacity is large, the adsorption speed is high, and the adsorption capacity is 1-0 times that of the common activated carbon; easy regeneration and large process flexibility (can be made into various forms such as yarn, cloth, felt and paper); and the characteristics of difficult pulverization and sedimentation, etc. Currently, the ACFs are widely applied to the aspects of chemical industry, environmental protection, medical use, food sanitation and the like, and are more and more concerned by people.
The activated carbon fiber has stronger performance, but the mechanical property of the activated carbon fiber is reduced along with the increase of the oxidation time, and the further utilization of the activated carbon fiber is influenced. In the preparation of the composite material, the decrease of the mechanical property of the activated carbon fiber can lead to the decrease of the adsorption property.
Air quality problems are various, and higher requirements are also put on air purification materials, and good air circulation is required.
Disclosure of Invention
The invention aims to provide a manganese-loaded modified activated carbon fiber which can be used for adsorbing materials, has good mechanical properties and can be used for formaldehyde purification.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a preparation method of manganese-loaded modified activated carbon fiber comprises the following steps: soaking the activated carbon fiber in a nitric acid solution for activation for 3-10h, filtering, washing and drying, adding the activated carbon fiber and trimethyl colchicine acid into a hydrochloric acid solution, adding ammonium persulfate, reacting at the temperature of 5-15 ℃ for 3-6h, filtering and drying to obtain a modified activated carbon fiber, soaking the modified activated carbon fiber in a potassium permanganate solution for 1-6h, filtering and drying to obtain the manganese-loaded modified activated carbon fiber. Activated by nitric acid, the surface oxygen-containing groups of the activated carbon fiber are increased, the activated carbon fiber with a developed pore structure is formed, a polycyclic ring and polar groups are introduced into the activated carbon fiber through the reaction of trimethyl colchicine acid and the activated carbon fiber, the mechanical property of the activated carbon fiber is improved through intermolecular force, the pore structure of the activated carbon fiber is maintained, and the formaldehyde removal effect of the air purification material is further improved.
Preferably, the preparation of activated carbon fibers: adding the activated carbon fiber into a nitric acid solution, standing for pretreatment for 10-60min, then activating for 3-10h at the temperature of 60-90 ℃, then taking out the activated carbon fiber, washing the activated carbon fiber with deionized water to the pH value of 6-8, and drying in an oven to obtain the activated carbon fiber.
More preferably, the mass fraction of the nitric acid solution is 50-70 wt%, e.g., 52, 55, 57, 60, 67, 69 wt%.
More preferably, the amount of the activated carbon fiber added is HNO35-20 wt% of the solution, e.g., 6, 6.5, 9, 12, 16, 18, 19 wt%.
Preferably, the preparation of the manganese-loaded modified activated carbon fiber comprises the following steps: adding activated carbon fiber and trimethyl colchicine acid into a hydrochloric acid solution, adding ammonium persulfate, reacting at the temperature of 5-15 ℃ for 6-24h, filtering, alternately washing with acetone and deionized water for 2-5 times, washing with deionized water to the pH value of 6-8, vacuum drying to obtain modified activated carbon fiber, soaking the modified activated carbon fiber in a potassium permanganate solution at the temperature of 10-40 ℃ for 1-6h, filtering and drying to obtain the manganese-loaded modified activated carbon fiber.
More preferably, the concentration of the hydrochloric acid solution is 0.3 to 3M.
More preferably, the activated carbon fiber is added in an amount of 1 to 5 wt% of the hydrochloric acid solution, for example, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 wt%.
More preferably, the amount of trimethylcolchiconic acid added is 3-12 wt% of the hydrochloric acid solution, e.g. 3.5, 4.5, 6, 7.5, 8, 9, 10, 11, 11.5 wt%.
More preferably, the ammonium persulfate is added in an amount of 0.05 to 2 wt% based on the hydrochloric acid solution.
More preferably, the modification time is from 12 to 24h, e.g., 13, 15, 18, 20, 22, 23 h.
More preferably, the concentration of the potassium permanganate solution is 1-10 wt%, 1.5, 2, 3.5, 4, 5.5, 6, 8, 9 wt%.
The invention provides a manganese-loaded modified activated carbon fiber capable of being used in an adsorption material and a preparation method thereof.
The invention also aims to provide the formaldehyde-removing air purification material with high formaldehyde removal effect.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a preparation method of an air purification material for removing formaldehyde comprises the following steps: adding the modified activated carbon fiber and/or the manganese-loaded modified activated carbon fiber, hydroxyapatite and cellulose into a solvent, uniformly stirring and mixing to obtain sticky slurry, injecting the sticky slurry into a mold, and drying and molding to obtain the air purification material.
Preferably, the amount of hydroxyapatite added is 20-50 wt% of the activated carbon fiber, e.g., 23, 28, 32, 35, 40, 45, 48 wt%.
Preferably, the cellulose is added in an amount of 10-30 wt% of the activated carbon fiber, e.g., 12, 116, 18, 20, 21, 23, 25, 27 wt%.
Preferably, the solvent is cyclohexanone and water in a mass ratio of 1: 0.2-5.
Preferably, the amount of solvent added is 100-200 wt%, e.g., 120, 150, 160, 180, 190 wt% of the activated carbon fiber.
Preferably, the air purification material can also be prepared as follows: adding the manganese-loaded modified activated carbon fiber, the modified hydroxyapatite and the cellulose into a solvent, stirring and mixing uniformly to obtain sticky slurry, injecting the sticky slurry into a mold, and drying and molding. Wherein, the preparation of the modified hydroxyapatite comprises the following steps: adding pregnenolone, ribostamycin sulfate and hydroxyapatite into absolute ethyl alcohol, stirring, mixing and dissolving, treating at 60-90 ℃ for 2-9h, and finally drying in a vacuum drying oven to obtain the modified hydroxyapatite. Polar groups on pregnenolone and ribostamycin sulfate attract ions in hydroxyapatite tightly, and other hydrophilic oxygen atoms in the molecules are positioned at the outer side, so that the periphery of the molecules is easily combined with water, and the hydrophilicity is greatly enhanced; the pregnenolone, the ribostamycin sulfate and the hydroxyapatite particle form pores on the surface, and can be absorbed by water to swell due to hydrophilic groups, so that the hygroscopicity is increased. The pregnenolone and the ribostamycin sulfate adsorbed on the surface of the hydroxyapatite particle and the cellulose are mutually wound with the manganese-loaded modified activated carbon fiber to form a large number of pore structures due to hydrogen bonds and space effects, and the pore structures are favorable for air circulation and reduce air resistance of the air purification material.
More preferably, the amount of hydroxyapatite added is 1-5 wt% of absolute ethanol, e.g., 2, 2.5, 3, 3.5, 4, 4.5 wt%.
More preferably, pregnenolone is added in an amount of 5-20 wt%, e.g. 6, 8, 10, 12, 15, 18, 19 wt% of absolute ethanol.
More preferably, the amount of ribostamycin sulfate added is 5-20 wt% of absolute ethanol, e.g., 6, 8, 10, 12, 15, 16, 18, 19 wt%.
Because the invention adopts manganese loaded modified activated carbon fiber, hydroxyapatite or modified hydroxyapatite, cellulose, the invention has the following beneficial effects: the formaldehyde scavenger has good effect of scavenging formaldehyde, the formaldehyde scavenging rate at least reaches 75%, the formaldehyde scavenger has good effect of scavenging moisture in the air, the moisture absorption at least reaches 5%, the air circulation is good, and the maximum air pressure drop is 15.6 kPa/g. Therefore, the formaldehyde-removing air purification material has the advantages of high formaldehyde removal effect, good hygroscopicity and good air circulation.
Drawings
FIG. 1 is an infrared image of activated carbon fibers before and after modification;
FIG. 2 is a graph of formaldehyde removal rate for an air purification material;
FIG. 3 is a graph of the moisture absorption rate of an air purification material;
fig. 4 is a graph of the unit pressure drop of the air purification material.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:
example 1:
a preparation method of an air purification material for removing formaldehyde,
preparing activated carbon fiber: adding activated carbon fiber into HNO3Standing and pretreating the solution for 30min, then activating the solution at the temperature of 60-90 ℃ for 8h, taking out the activated carbon fiber, washing the activated carbon fiber by deionized water until the pH value is 7, and drying the activated carbon fiber in an oven to obtain the activated carbon fiber; HNO3The mass fraction of the solution is 65 wt%, and the addition amount of the activated carbon fiber is HNO 310 wt% of the solution.
Preparing the manganese-loaded modified activated carbon fiber: adding activated carbon fiber and trimethyl colchicine acid into a hydrochloric acid solution, adding ammonium persulfate, reacting at the temperature of 10 ℃ for 16h, filtering, alternately washing with acetone and deionized water for 2 times, then washing with deionized water to pH 7, vacuum drying to obtain modified activated carbon fiber, soaking the modified activated carbon fiber in a potassium permanganate solution at the temperature of 20 ℃ for 3h, filtering and drying to obtain manganese-loaded modified activated carbon fiber; the concentration of the hydrochloric acid solution is 1.2M, the addition amount of the activated carbon fiber is 3 wt% of the hydrochloric acid solution, the addition amount of the trimethyl colchicine acid is 5 wt% of the hydrochloric acid solution, the addition amount of the ammonium persulfate is 0.8 wt% of the hydrochloric acid solution, and the concentration of the potassium permanganate solution is 6 wt%.
Preparing an air purification material: adding the manganese-loaded modified activated carbon fiber, hydroxyapatite and cellulose into a solvent, stirring and mixing uniformly to obtain viscous slurry, injecting the viscous slurry into a mold, and drying and molding to obtain the air purification material; the addition amount of the hydroxyapatite is 30 wt% of the manganese-loaded modified activated carbon fiber, the addition amount of the cellulose is 20 wt% of the manganese-loaded modified activated carbon fiber, and the solvent is cyclohexanone and water in a mass ratio of 1: 1, and the addition amount of the solvent is 120 wt% of the manganese-loaded modified activated carbon fiber.
Example 2:
a preparation method of an air purification material for removing formaldehyde,
preparing activated carbon fiber: adding activated carbon fiber into HNO3Standing and pretreating the solution for 30min, then activating the solution at the temperature of 60-90 ℃ for 8h, taking out the activated carbon fiber, washing the activated carbon fiber by deionized water until the pH value is 7, and drying the activated carbon fiber in an oven to obtain the activated carbon fiber; HNO3The mass fraction of the solution is 65 wt%, and the addition amount of the activated carbon fiber is HNO 310 wt% of the solution.
Preparing the manganese-loaded modified activated carbon fiber: adding activated carbon fiber and trimethyl colchicine acid into a hydrochloric acid solution, adding ammonium persulfate, reacting at the temperature of 10 ℃ for 16h, filtering, alternately washing with acetone and deionized water for 2 times, then washing with deionized water to pH 7, vacuum drying to obtain modified activated carbon fiber, soaking the modified activated carbon fiber in a potassium permanganate solution at the temperature of 20 ℃ for 3h, filtering and drying to obtain manganese-loaded modified activated carbon fiber; the concentration of the hydrochloric acid solution is 1.2M, the addition amount of the activated carbon fiber is 3 wt% of the hydrochloric acid solution, the addition amount of the trimethyl colchicine acid is 9 wt% of the hydrochloric acid solution, the addition amount of the ammonium persulfate is 0.8 wt% of the hydrochloric acid solution, and the concentration of the potassium permanganate solution is 6 wt%.
Preparing an air purification material: adding the manganese-loaded modified activated carbon fiber, hydroxyapatite and cellulose into a solvent, stirring and mixing uniformly to obtain viscous slurry, injecting the viscous slurry into a mold, and drying and molding to obtain the air purification material; the addition amount of the hydroxyapatite is 30 wt% of the manganese-loaded modified activated carbon fiber, the addition amount of the cellulose is 20 wt% of the manganese-loaded modified activated carbon fiber, and the solvent is cyclohexanone and water in a mass ratio of 1: 1, and the addition amount of the solvent is 120 wt% of the manganese-loaded modified activated carbon fiber.
Example 3:
a preparation method of an air purification material for removing formaldehyde,
preparing activated carbon fiber: adding activated carbon fiber into HNO3Standing and pretreating the solution for 30min, then activating the solution at the temperature of 60-90 ℃ for 8h, taking out the activated carbon fiber, washing the activated carbon fiber by deionized water until the pH value is 7, and drying the activated carbon fiber in an oven to obtain the activated carbon fiber; HNO3The mass fraction of the solution is 65 wt%, and the addition amount of the activated carbon fiber is HNO 310 wt% of the solution.
Preparing the manganese-loaded modified activated carbon fiber: adding activated carbon fiber and trimethyl colchicine acid into a hydrochloric acid solution, adding ammonium persulfate, reacting at the temperature of 10 ℃ for 16h, filtering, alternately washing with acetone and deionized water for 2 times, then washing with deionized water to pH 7, vacuum drying to obtain modified activated carbon fiber, soaking the modified activated carbon fiber in a potassium permanganate solution at the temperature of 20 ℃ for 3h, filtering and drying to obtain manganese-loaded modified activated carbon fiber; the concentration of the hydrochloric acid solution is 1.2M, the addition amount of the activated carbon fiber is 3 wt% of the hydrochloric acid solution, the addition amount of the trimethyl colchicine acid is 9 wt% of the hydrochloric acid solution, the addition amount of the ammonium persulfate is 0.8 wt% of the hydrochloric acid solution, and the concentration of the potassium permanganate solution is 6 wt%.
Preparing modified hydroxyapatite: adding the manganese-loaded modified activated carbon fiber, the modified hydroxyapatite and the cellulose into a solvent, stirring and mixing uniformly to obtain sticky slurry, injecting the sticky slurry into a mold, and drying and molding. Wherein, the preparation of the modified hydroxyapatite comprises the following steps: adding pregnenolone, ribostamycin sulfate and hydroxyapatite into absolute ethyl alcohol, stirring, mixing and dissolving, treating at 60-90 ℃ for 2-9h, and finally drying in a vacuum drying oven to obtain modified hydroxyapatite; the addition amount of the hydroxyapatite is 3 wt% of the absolute ethyl alcohol. The addition amount of pregnenolone is 6 wt% of absolute ethyl alcohol, and the addition amount of ribostamycin sulfate is 5 wt% of absolute ethyl alcohol.
Preparing an air purification material: adding the manganese-loaded modified activated carbon fiber, the modified hydroxyapatite and the cellulose into a solvent, stirring and mixing uniformly to obtain sticky slurry, injecting the sticky slurry into a mold, and drying and molding to obtain the air purification material; the addition amount of the modified hydroxyapatite is 30 wt% of the manganese-loaded modified activated carbon fiber, the addition amount of the cellulose is 20 wt% of the manganese-loaded modified activated carbon fiber, and the solvent is cyclohexanone and water in a mass ratio of 1: 1, and the addition amount of the solvent is 120 wt% of the manganese-loaded modified activated carbon fiber.
Example 4:
a preparation method of an air purification material for removing formaldehyde,
preparing activated carbon fiber: adding activated carbon fiber into HNO3Standing and pretreating the solution for 30min, then activating the solution at the temperature of 60-90 ℃ for 8h, taking out the activated carbon fiber, washing the activated carbon fiber by deionized water until the pH value is 7, and drying the activated carbon fiber in an oven to obtain the activated carbon fiber; HNO3The mass fraction of the solution is 65 wt%, and the addition amount of the activated carbon fiber is HNO 310 wt% of the solution.
Preparing the manganese-loaded modified activated carbon fiber: adding activated carbon fiber and trimethyl colchicine acid into a hydrochloric acid solution, adding ammonium persulfate, reacting at the temperature of 10 ℃ for 16h, filtering, alternately washing with acetone and deionized water for 2 times, then washing with deionized water to pH 7, vacuum drying to obtain modified activated carbon fiber, soaking the modified activated carbon fiber in a potassium permanganate solution at the temperature of 20 ℃ for 3h, filtering and drying to obtain manganese-loaded modified activated carbon fiber; the concentration of the hydrochloric acid solution is 1.2M, the addition amount of the activated carbon fiber is 3 wt% of the hydrochloric acid solution, the addition amount of the trimethyl colchicine acid is 9 wt% of the hydrochloric acid solution, the addition amount of the ammonium persulfate is 0.8 wt% of the hydrochloric acid solution, and the concentration of the potassium permanganate solution is 6 wt%.
Preparing modified hydroxyapatite: adding the manganese-loaded modified activated carbon fiber, the modified hydroxyapatite and the cellulose into a solvent, stirring and mixing uniformly to obtain sticky slurry, injecting the sticky slurry into a mold, and drying and molding. Wherein, the preparation of the modified hydroxyapatite comprises the following steps: adding pregnenolone, ribostamycin sulfate and hydroxyapatite into absolute ethyl alcohol, stirring, mixing and dissolving, treating at 60-90 ℃ for 2-9h, and finally drying in a vacuum drying oven to obtain modified hydroxyapatite; the addition amount of the hydroxyapatite is 3 wt% of the absolute ethyl alcohol. The addition amount of pregnenolone is 10 wt% of absolute ethyl alcohol, and the addition amount of ribostamycin sulfate is 10 wt% of absolute ethyl alcohol.
Preparing an air purification material: adding the manganese-loaded modified activated carbon fiber, the modified hydroxyapatite and the cellulose into a solvent, stirring and mixing uniformly to obtain sticky slurry, injecting the sticky slurry into a mold, and drying and molding to obtain the air purification material; the addition amount of the modified hydroxyapatite is 30 wt% of the manganese-loaded modified activated carbon fiber, the addition amount of the cellulose is 20 wt% of the manganese-loaded modified activated carbon fiber, and the solvent is cyclohexanone and water in a mass ratio of 1: 1, and the addition amount of the solvent is 120 wt% of the manganese-loaded modified activated carbon fiber.
Comparative example 1:
the comparative example is different from example 2 only in that the manganese-loaded modified activated carbon fiber is replaced with the modified activated carbon fiber in the preparation of the air purification material.
Comparative example 2:
compared with the example 2, the comparative example is different only in that the manganese-loaded modified activated carbon fiber is replaced by the manganese-loaded activated carbon fiber in the preparation of the air purification material.
The preparation method of the manganese-loaded activated carbon fiber is to replace the modified carbon fiber with the activated carbon fiber.
Comparative example 3:
the comparative example is different from example 2 only in that the manganese-loaded modified activated carbon fiber is replaced with the activated carbon fiber in the preparation of the air purification material.
Comparative example 4:
this comparative example is different from example 4 only in that ribostamycin sulfate was not added in the preparation of the modified hydroxyapatite.
Comparative example 5:
this comparative example is different from example 4 only in that pregnenolone was not added in the preparation of the modified hydroxyapatite.
Comparative example 6:
this comparative example is different from example 4 only in that cellulose is not added in the preparation of the air cleaning material.
Comparative example 7:
this comparative example is different from example 4 only in that modified hydroxyapatite was not added in the preparation of the air purification material.
Comparative example 8:
this comparative example is different from example 4 only in that only manganese-supported modified activated carbon was used in the preparation of the air cleaning material.
Test example 1:
1. activated carbon fiber modification front and back infrared detection
The activated carbon fiber before and after modification is subjected to potassium bromide tabletting method, and the test wavelength is 500-4000cm-1。
The infrared test result is shown in figure 1, wherein a is the infrared spectrum of the activated carbon fiber, and b is the infrared spectrum of the modified activated carbon fiber; compared with the infrared spectrum of the activated carbon fiber, the modified activated carbon fiber is 2960cm-1Has a strong alkane absorption peak at 1680cm-1Generates a carbonyl absorption peak of 1320cm-1The position is shown as a carbon-nitrogen absorption peak, which indicates that the trimethyl colchicine acid is successfully modified to the activated carbon fiber.
2. Activated carbon fiber and modified activated carbon fiber mechanical property
The activated carbon fibers and modified activated carbon fibers obtained in example 2 were tested for tensile strength using an electronic universal tester, model U.S. Instron 3382, at a tensile speed of 5mm/min, and each group of samples was subjected to 5 repeated experiments under the same test conditions, and the average value was taken as a test result.
TABLE 1 mechanical Strength
Tensile strength/MPa RSD/％
Activated carbon fiber 151.48 3.15
Activated carbon fiber 132.45 3.24
Modified activated carbon fiber 168.63 4.62
The mechanical strength test is shown in table 1, and the tensile strength of the activated carbon fiber is improved by 27.32% compared with the tensile strength of the activated carbon fiber and 11.32% compared with the tensile strength of the activated carbon fiber after the activated carbon fiber is modified.
Test example 2:
1. air purifying material formaldehyde scavenging performance
In a national Standard test, according to GB/T18801-2015(3 m)3Test chamber), 50g of the air-purifying material obtained in each example and comparative example was placed in a Philips ACA-301 air purifier, the chamber door was closed, the stirring fan was turned on, 38% formaldehyde was dropped into the heater, and when the formaldehyde concentration in the test chamber was stabilized at 1mg/m3In time, the air purifier is started, the test time is 1 hour, and the test is finishedAnd detecting the concentration of formaldehyde in the bin.
Formaldehyde clearance ═ (concentration before test-concentration after test)/concentration before test
The result of the test on the formaldehyde removal performance of the air purification material is shown in fig. 2, the formaldehyde removal rate of the air purification material obtained in example 2 is the highest, the formaldehyde removal rate of the comparative example 3 is the lowest, and compared with the comparative example 1, the formaldehyde removal rate of the example 2 is improved by 12%, which shows that the formaldehyde removal rate is improved when manganese is loaded on the modified activated carbon fiber; compared with the comparative example 2, the formaldehyde removal rate obtained in the example 2 is improved by 16%, which shows that the formaldehyde removal rate is improved after the activated carbon fiber is modified; compared with the comparative example 3, the formaldehyde removal rate obtained in the example 2 is improved by 20%, which shows that the formaldehyde removal effect of the activated carbon fiber is greatly improved after the activated carbon fiber is modified and loaded with manganese; compared with the comparative example 3, the formaldehyde removal rate obtained in the comparative example 1 is improved by 8 percent, and the removal effect of the activated carbon fiber modified by the trimethylcolchicine acid on formaldehyde is further shown to be better than that of the unmodified carbon fiber; comparative example 2 compared to comparative example 3, the formaldehyde removal rate obtained in comparative example 2 was increased by 4%, further indicating that the loading of manganese can increase the formaldehyde removal rate.
2. Moisture absorption performance of air purification material
The air purification materials obtained in the examples and the comparative examples are taken and put in an oven to be dried for 2 hours at the temperature of 60 ℃, 50g of the air purification materials obtained in the dried examples and the comparative examples are respectively weighed by an analytical balance and put in a constant temperature and humidity incubator, and the humidity conditioning condition of the materials is measured at different temperatures and humidity for certain time.
The moisture absorption test method comprises the following steps: setting up constant temperature and humidity incubator parameter, the temperature is set to 25 ℃, and relative humidity sets to 85%, and after the working parameter is stable, put into the studio respectively with the sample, weigh the sample every 2h, and the moisture absorption rate formula does not change until the sample reaches saturated moisture absorption weight no longer:
moisture absorption rate (sample mass after moisture absorption-sample initial mass)/sample initial mass × 100%
The result of the air purification material moisture absorption performance test is shown in fig. 3, the air purification material obtained in example 4 has the highest moisture absorption rate, which reaches 12%, the air purification material obtained in example 2 has the lowest moisture absorption rate, which only reaches 5%, and example 4 is compared with example 2, which shows that the moisture absorption of the air purification material is improved by modifying hydroxyapatite with pregnenolone and ribostamycin sulfate; example 4 compared with comparative example 4, shows that the moisture absorption effect of pregnenolone and ribostamycin sulfate on hydroxyapatite modification is better than that of pregnenolone only; example 4 compared with comparative example 5, the moisture absorption effect of pregnenolone and ribostamycin sulfate on hydroxyapatite modification is better than that of only ribostamycin sulfate modification; compared with example 2, the comparative example 4 shows that the hygroscopicity effect is improved by about 1% after the pregnenolone modified hydroxyapatite; compared with example 2, the comparison example 5 shows that the hygroscopicity effect is improved by about 2% after the hydroxyapatite is modified by the ribostamycin sulfate; in conclusion, it is proved that the hygroscopicity of the air purification material can be slightly improved by singly modifying the hydroxyapatite, and the hygroscopicity of the air purification material is optimal when the pregnenolone and the ribostamycin sulfate are jointly modified.
3. Air resistance of air purifying material
50g of the test specimen was placed in a sealing jig and measured at an air flow rate of 4cm/s and an air resistance (. DELTA.P) of the air cleaning film by a pressure gauge (UEi, EM 201-B).
Air purification material air resistance/mass
The test results of the air resistance of the air purification material are shown in fig. 4, the air resistance of the air purification materials obtained in comparative example 7 and comparative example 8 are relatively close, and the fact that the cellulose in the comparative example 7 cannot reduce the air resistance of the air purification material is shown; compared with the comparative example 6, the comparative example 8 shows that the addition of the modified hydroxyapatite reduces the air resistance of the air purification material and improves the air circulation effect; compared with example 4, comparative example 8 shows that the air resistance of the air purification material is further reduced by adding the modified hydroxyapatite and the cellulose, and the air resistance can be further reduced by adding the cellulose to prepare the air purification material in the presence of the modified hydroxyapatite.
The above embodiments are merely illustrative, and not restrictive, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims (10)

1. A preparation method of manganese-loaded modified activated carbon fiber comprises the following steps: soaking the activated carbon fiber in a nitric acid solution for activation for 3-10h, filtering, washing and drying, adding the activated carbon fiber and trimethyl colchicine acid into a hydrochloric acid solution, adding ammonium persulfate, reacting at the temperature of 5-15 ℃ for 3-6h, filtering and drying to obtain a modified activated carbon fiber, soaking the modified activated carbon fiber in a potassium permanganate solution for 1-6h, filtering and drying to obtain the manganese-loaded modified activated carbon fiber.
2. The preparation method of the manganese-loaded modified activated carbon fiber according to claim 1, which is characterized by comprising the following steps: the addition amount of the trimethyl colchicine acid is 3-12 wt% of the hydrochloric acid solution.
3. The preparation method of the manganese-loaded modified activated carbon fiber according to claim 1, which is characterized by comprising the following steps: the addition amount of the activated carbon fiber is 1-5 wt% of the hydrochloric acid solution.
4. A modified activated carbon fiber or a manganese-loaded modified activated carbon fiber prepared by the method of any one of claims 1 to 3.
5. Use of the modified activated carbon fiber or manganese-loaded modified activated carbon fiber of claim 4 in an adsorbent material.
6. A preparation method of an air purification material for removing formaldehyde comprises the following steps: adding the modified activated carbon fiber and/or the manganese-loaded modified activated carbon fiber, the hydroxyapatite and the cellulose of claim 4 into a solvent, uniformly stirring and mixing to obtain viscous slurry, injecting the viscous slurry into a mold, and drying and molding to obtain the air purification material.
7. The method for preparing the air purifying material for removing formaldehyde as claimed in claim 6, wherein the method comprises the following steps: the addition amount of the hydroxyapatite is 20-50 wt% of the activated carbon fiber.
8. The method for preparing the air purifying material for removing formaldehyde as claimed in claim 6, wherein the method comprises the following steps: the addition amount of the cellulose is 10-30 wt% of the activated carbon fiber.
9. The method for preparing the air purifying material for removing formaldehyde as claimed in claim 6, wherein the method comprises the following steps: the solvent is cyclohexanone and water.
10. An air cleaning material obtainable by the process of any one of claims 6 to 9.
CN202010597584.0A 2020-06-28 2020-06-28 Air purification material for removing formaldehyde Withdrawn CN111888882A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114130194A (en) * 2021-12-13 2022-03-04 吕国杰 Formaldehyde purifying agent and preparation process thereof
CN115874491A (en) * 2022-12-23 2023-03-31 点金新型材料研究院(厦门)有限公司 Aldehyde-removing decorative paper, aldehyde-removing decorative board and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114130194A (en) * 2021-12-13 2022-03-04 吕国杰 Formaldehyde purifying agent and preparation process thereof
CN115874491A (en) * 2022-12-23 2023-03-31 点金新型材料研究院(厦门)有限公司 Aldehyde-removing decorative paper, aldehyde-removing decorative board and preparation method thereof
CN115874491B (en) * 2022-12-23 2024-03-08 点金新型材料研究院(厦门)有限公司 Aldehyde-removing decorative paper, aldehyde-removing decorative board and preparation method of aldehyde-removing decorative paper

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Application publication date: 20201106