CN113750651A - Filter material with antibacterial and deodorizing functions and preparation method thereof - Google Patents
Filter material with antibacterial and deodorizing functions and preparation method thereof Download PDFInfo
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- B01D39/14—Other self-supporting filtering material ; Other filtering material
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- A01N55/00—Biocides, pest repellants or attractants, or plant growth regulators, containing organic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen and sulfur
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Abstract
The invention relates to a filter material with antibacterial and deodorizing functions and a preparation method thereof, belonging to the technical field of air purification and comprising the following preparation steps: firstly, preparing an acidic compound aqueous solution, adding the porous material A, soaking for 2-5h, taking out, and drying at 60 ℃ for 1-3h to obtain the porous material A loaded with the acidic compound; preparing a copper chloride aqueous solution, adding the porous material B, soaking for 5-8h, taking out, and drying at 75 ℃ for 1-2h to obtain the porous material B loaded with a metal salt solution liquid film; mixing the porous material A loaded with the acidic compound and the porous material B loaded with the liquid film of the metal salt solution to obtain the filter material; the invention adopts the metal copper chloride as the catalyst, can capture water in the air to form a liquid phase on the surface of the porous material, promotes the absorption of peculiar smell and catalytic reaction, can better promote the absorption and decomposition of odor gases such as ammonia gas, trimethylamine and the like under the acidic condition, and has excellent antibacterial action.
Description
Technical Field
The invention belongs to the technical field of air purification, and particularly relates to a filter material with antibacterial and deodorizing functions and a preparation method thereof.
Background
The prior deodorization technology mainly comprises activated carbon, honeycomb ceramic, photocatalyst and the like, and the technical defects are obvious, such as good initial performance of the activated carbon and the honeycomb ceramic, short service life, formation of a secondary pollution source after reaching adsorption saturation and no antibacterial function. The photocatalyst needs to be matched with ultraviolet rays for use, the deodorization efficiency is lower than that of activated carbon, the requirement on the ultraviolet rays is high, and the ultraviolet rays damage the aging of materials and the health of people.
Chinese patent CN109701320A discloses a filter material with a degerming function and a preparation method thereof, wherein the filter material comprises the following raw materials: activated carbon, acrylic acid, oxalic acid, dodecyl dimethyl benzyl ammonium chloride, phenols, a traditional Chinese medicine degerming agent, a dispersing agent, a modifying agent and water. The preparation method is simple and convenient, but the invention takes the activated carbon as the adsorption base material, the activated carbon adsorbs the acids, the traditional Chinese medicine bactericide and other substances as physical adsorption, the adsorption is not firm, and in the using process, the organic matters are easy to separate from the activated carbon, so that the sterilization function of the filter material is lost, therefore, the filter material with efficient and stable antibacterial and deodorizing functions is the technical problem to be solved at present.
Disclosure of Invention
The invention aims to provide a filter material with antibacterial and deodorizing functions, so as to solve the technical problems in the background technology.
The purpose of the invention can be realized by the following technical scheme:
a filter material with antibacterial and deodorizing functions comprises a porous material A loaded with an acidic compound and a porous material B loaded with a liquid film of a metal salt solution;
the filter material with the antibacterial and deodorizing functions is prepared by the following steps:
firstly, preparing an acid compound aqueous solution with the mass fraction of 2-10%, adding a porous material A, soaking for 2-5h, taking out, and drying at 60 ℃ for 1-3h to obtain the porous material A loaded with the acid compound;
secondly, preparing a copper chloride aqueous solution with the mass fraction of 25-40%, adding the porous material B, soaking for 5-8h, taking out, and drying at 75 ℃ for 1-2h to obtain the porous material B loaded with a metal salt solution liquid film;
thirdly, mixing the porous material A loaded with the acidic compound and the porous material B loaded with the liquid film of the metal salt solution according to a mass ratio of 0.2-1: 0.5 to 5 portions of the mixture is added into a stirring tank and mixed for 1 to 2 hours under the condition of the rotating speed of 200 plus materials and 300r/min, and the filter material with the functions of antibiosis and deodorization is obtained.
Further, the mass ratio of the porous material A to the acidic compound aqueous solution in the first step is 0.5-1: 1-2.
Further, the acidic compound is one or more of phosphoric acid, lactic acid, adipic acid and fumaric acid which are mixed according to any proportion.
Further, the mass ratio of the porous material B to the copper chloride aqueous solution in the second step is 1-2: 2-3.
Further, the porous material B is made by the following steps:
s1, placing N, N-dimethyl N-octadecylamine and epoxy bromopropane in a round-bottom flask, stirring for 10min, heating to 70 ℃, magnetically stirring for reaction for 2h, cooling to room temperature after the reaction is finished to generate a white solid, performing suction filtration, washing a filter cake for 3-5 times by using anhydrous ether, and drying in an oven at 40-45 ℃ for 10-12h to obtain an intermediate product 1;
wherein the dosage ratio of the N, N-dimethyl N-octadecylamine to the epoxy bromopropane is 20 mmol: 20-30mmol, carrying out quaternization reaction by using N, N-dimethyl N-octadecylamine and epoxy bromopropane to obtain an intermediate product 1, wherein the reaction process is as follows:
step S2, adding the intermediate product 1 and tetrahydrofuran into a three-neck flask under the protection of nitrogen, stirring for 5-8min, adding a taurine aqueous solution, heating to reflux reaction for 2-4h under the condition of a rotation speed of 100-;
wherein the dosage ratio of the intermediate product 1, the tetrahydrofuran and the taurine aqueous solution is 50 mmol: 80-110 mL: 10mL, the aqueous solution of taurine is prepared by mixing taurine and deionized water according to the weight ratio of 50 mmol: 10mL of the intermediate product is mixed, and the intermediate product 2 is prepared by performing ring-opening reaction on amino and epoxy, wherein the reaction process is as follows:
step S3, dissolving the intermediate product 2 in dichloromethane, adding 2-methyl-5-nitrobenzene isocyanate, simultaneously dripping dibutyltin dilaurate as a catalyst, uniformly mixing, reacting for 2-3h under magnetic stirring at 60 ℃, cooling to room temperature, vacuum drying the solvent, purifying the dried product in anhydrous ether, filtering, and drying in an oven at 40 ℃ to constant weight to obtain an intermediate product 3;
wherein the dosage ratio of the intermediate product 2, dichloromethane and 2-methyl-5-isocyanic acid nitrobenzene is 20 mmol: 100mL of: 20mmol of dibutyltin dilaurate which is 3-5% of the total mass of the intermediate product 2 and 2-methyl-5-isocyanic nitrobenzene, under the catalytic action of dibutyltin dilaurate, enabling-NCO and-OH to have chemical reaction to obtain an intermediate product 3, wherein the reaction process is as follows:
step S4, adding iron powder and a hydrochloric acid solution into a three-neck flask, heating to 105 ℃, reacting for 20min, adding an ethanol solution of an intermediate product 3, keeping the temperature, reacting for 2-4h, cooling to 80 ℃, adjusting the pH value to 7-8 by using a 0.5mol/L sodium hydroxide solution, filtering to remove iron powder, adding ethyl acetate into filtrate to stratify, carrying out rotary evaporation on an organic phase to 1/3 volume, and finally carrying out freeze drying at-45 ℃ to constant weight to obtain a graft;
wherein the dosage ratio of the iron powder, the hydrochloric acid solution and the ethanol solution of the intermediate product 3 is 0.5-0.8 g: 20-25 mL: 88.7 to 92.6mL, the mass fraction of the hydrochloric acid solution is 17 percent, and the ethanol solution of the intermediate product 3 is prepared by mixing the intermediate product 3 and absolute ethanol according to the weight ratio of 5.6 to 7.4 g: 100mL of a mixture of-NO with iron powder2Reduction to-NH2The graft was obtained by the following reaction sequence:
step S5, dissolving humic acid and sodium silicate in deionized water, stirring for 20min at a rotation speed of 60-100r/min, heating to 70 ℃, dropwise adding a hydrochloric acid solution at a speed of 4-5mL/min while stirring at a rotation speed of 500r/min under stirring, adjusting the pH to 7, adding a calcium chloride solution with a concentration of 1mol/L after precipitation, continuing stirring for 20-30min, filtering, washing a filter cake with deionized water for 5 times, drying to a constant weight at 90 ℃, grinding, and sieving with an 80-mesh sieve to obtain a carrier;
wherein, the dosage ratio of humic acid, sodium silicate and deionized water is 1: 1.5: 28.6-34.2mL, the mass fraction of the hydrochloric acid solution is 17%, and the mass ratio of the calcium chloride solution to the humic acid is 1.1-1.3: 1, in-situ polymerization is adopted, so that silicate ions can wrap humic acid simultaneously in the polymerization process, the humic acid has a certain dispersion effect, the humic acid is tightly combined with silicon dioxide, and the doped silicon dioxide is used as a carrier to improve certain strength, so that the hydration expansion and dissolution of the humic acid can be prevented, the specific surface area and the porosity of the carrier are improved, and more adsorption sites are provided;
step S6, adding a carrier, EDC, NHS and deionized water into a three-neck flask, stirring for 1h at room temperature, then adding a graft, adjusting the pH of a reaction solution to 5-6 by using a hydrochloric acid solution with the mass fraction of 10%, stirring for reaction for 12h at 35 ℃, filtering the reactant, washing a filter cake with deionized water for 3-5 times, and drying in vacuum to constant weight to obtain a porous material B;
wherein, the dosage ratio of the carrier, EDC, NHS, deionized water and the graft is 3.8-4.5 g: 0.5-1 g: 0.4-0.9 g: 120-160 mL: 0.01mol, and obtaining the porous material B by utilizing the amide reaction of carboxyl and amino.
Further, the porous material A is formed by mixing one or more of ceramic particles, activated carbon, activated alumina and natural plant fibers according to any ratio.
Further, the porous material A is honeycomb ceramic particles, and the specific surface area is 800-2/g。
The invention has the beneficial effects that:
the invention provides a filter material with antibacterial and deodorizing functions, which comprises a porous material A loaded with an acidic compound and a porous material B loaded with a metal salt solution liquid film, wherein copper chloride is used as a catalyst, the filter material has good water absorption effect, can capture water in the air to form a liquid phase on the surface of the porous material, promotes the absorption and catalytic reaction of peculiar smell, can better promote the absorption and decomposition of odor gases such as ammonia gas, trimethylamine and the like under an acidic condition, simultaneously has charges of copper ions which can be combined with bacteria to destroy the bacterial metabolism to cause the death of the bacteria and play an antibacterial role, the invention prepares a graft through a series of chemical reactions, the graft is a compound containing a quaternary ammonium salt structure, a sulfonic acid group and an end amino group, then prepares a doped carrier by using humic acid and sodium silicate as raw materials, and utilizes the end amino group of the graft to perform an amide reaction with the carboxyl group of the humic acid in the carrier to obtain the porous material B, a compound containing a quaternary ammonium salt structure and a sulfonic acid group is grafted on the surface of a carrier, humic acid contains various complexing functional groups (carboxyl, phenolic hydroxyl, carbonyl and secondary amino) and chelating groups (secondary amino, carboxyl and ether), wherein the complexing groups can provide electrons to generate a complex with copper ions, the chelating groups have more than two electron-donating ligands to generate a chelate with the copper ions, so that the porous material B has stable load capacity on copper chloride, the quaternary ammonium salt is a hydrophilic group and contains 12-18 carbon atoms in the main chain, the antibacterial property is better, the quaternary ammonium group can adsorb bacteria with negative charges on the surface through electrostatic action, cell walls are damaged, protein is inactivated, the cell structure is finally damaged, the antibacterial property is exerted, the porous material B is a composite material of the humic acid and silicon dioxide, and harder silicon dioxide is doped to ensure that the porous material B has certain hardness, the specific surface area is large, the void ratio is high, and more adsorption sites are provided; therefore, the filter material prepared by the invention can efficiently decompose peculiar smell, has excellent deodorization function and antibacterial performance, and has higher utilization value in the field of air purification.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a porous material B, which is prepared by the following steps:
step S1, placing 20mmol of N, N-dimethyl N-octadecylamine and 20mmol of epoxy bromopropane in a round-bottom flask, stirring for 10min, heating to 70 ℃, magnetically stirring for reaction for 2h, cooling to room temperature after the reaction is finished to generate a white solid, performing suction filtration, washing a filter cake for 3 times by using anhydrous ether, and placing in a 40 ℃ oven for drying for 10h to obtain an intermediate product 1;
step S2, under the protection of nitrogen, adding 50mmol of intermediate product 1 and 80mL of tetrahydrofuran into a three-neck flask, stirring for 5min, adding 10mL of taurine aqueous solution, heating to reflux reaction for 2h under the condition of 100r/min of rotation speed, cooling to room temperature after the reaction is finished, and performing vacuum spin-drying on the solvent to obtain an intermediate product 2, wherein the taurine aqueous solution is prepared by mixing taurine and deionized water according to the proportion of 50 mmol: 10mL of the mixture is mixed;
step S3, dissolving 20mmol of intermediate product 2 in 100mL of dichloromethane, adding 20mmol of 2-methyl-5-isocyanic acid nitrobenzene, simultaneously dropwise adding dibutyltin dilaurate as a catalyst, uniformly mixing, reacting for 2 hours at 60 ℃ under magnetic stirring, cooling to room temperature, vacuum drying the solvent, purifying the dried product in anhydrous ether, filtering, drying in an oven at 40 ℃ to constant weight to obtain an intermediate product 3, wherein dibutyltin dilaurate is 3% of the total mass of the intermediate product 2 and the 2-methyl-5-isocyanic acid nitrobenzene;
step S4, adding 0.5g of iron powder and 20mL of hydrochloric acid solution into a three-neck flask, heating to 105 ℃, reacting for 20min, adding 88.7mL of ethanol solution of intermediate product 3, reacting for 2h while keeping the temperature, cooling to 80 ℃, adjusting the pH value to 7 by using 0.5mol/L sodium hydroxide solution, filtering to remove the iron powder, adding ethyl acetate into filtrate, stratifying, rotationally evaporating an organic phase to 1/3 volume, and finally freeze-drying at-45 ℃ to constant weight to obtain a graft, wherein the mass fraction of the hydrochloric acid solution is 17%, and the ethanol solution of the intermediate product 3 is prepared from the intermediate product 3 and absolute ethyl alcohol according to the weight of 5.6 g: 100mL of the mixture is mixed;
step S5, dissolving 1g of humic acid and 1.5g of sodium silicate in 28.6mL of deionized water, stirring for 20min at a rotation speed of 60r/min, heating to 70 ℃, dropwise adding a hydrochloric acid solution at a speed of 4mL/min while stirring at a rotation speed of 500r/min, adjusting the pH to 7, adding a calcium chloride solution with a concentration of 1mol/L after precipitation, continuously stirring for 20min, filtering, washing a filter cake with the deionized water for 5 times, drying at 90 ℃ to constant weight, grinding, and sieving with a 80-mesh sieve to obtain a carrier, wherein the mass fraction of the hydrochloric acid solution is 17%, and the mass ratio of the calcium chloride solution to the humic acid is 1.1: 1;
and step S6, adding 3.8g of carrier, 0.5g of EDC, 0.4g of NHS and 120mL of deionized water into a three-neck flask, stirring for 1h at room temperature, then adding 0.01mol of graft, adjusting the pH of a reaction solution to 5 by using a hydrochloric acid solution with the mass fraction of 10%, stirring for reaction for 12h at 35 ℃, filtering the reactant, washing a filter cake for 3 times by using the deionized water, and drying in vacuum to constant weight to obtain the porous material B.
Example 2
The invention provides a porous material B, which is prepared by the following steps:
step S1, placing 20mmol of N, N-dimethyl N-octadecylamine and 25mmol of epoxy bromopropane in a round-bottom flask, stirring for 10min, heating to 70 ℃, magnetically stirring for reaction for 2h, cooling to room temperature after the reaction is finished to generate a white solid, performing suction filtration, washing a filter cake for 4 times by using anhydrous ether, and placing in a 42 ℃ oven for drying for 11h to obtain an intermediate product 1;
step S2, under the protection of nitrogen, adding 50mmol of intermediate product 1 and 90mL of tetrahydrofuran into a three-neck flask, stirring for 7min, adding 10mL of taurine aqueous solution, heating to reflux reaction for 3h under the condition of 150r/min of rotation speed, cooling to room temperature after the reaction is finished, and performing vacuum spin-drying on the solvent to obtain an intermediate product 2, wherein the taurine aqueous solution is prepared by mixing taurine and deionized water according to the proportion of 50 mmol: 10mL of the mixture is mixed;
step S3, dissolving 20mmol of intermediate product 2 in 100mL of dichloromethane, adding 20mmol of 2-methyl-5-isocyanic acid nitrobenzene, simultaneously dropwise adding dibutyltin dilaurate as a catalyst, uniformly mixing, reacting for 2.5h under magnetic stirring at 60 ℃, cooling to room temperature, vacuum drying the solvent, purifying the dried product in anhydrous ether, filtering, drying in an oven at 40 ℃ to constant weight to obtain an intermediate product 3, wherein dibutyltin dilaurate is 4% of the total mass of the intermediate product 2 and the 2-methyl-5-isocyanic acid nitrobenzene;
step S4, adding 0.7g of iron powder and 22mL of hydrochloric acid solution into a three-neck flask, heating to 105 ℃, reacting for 20min, adding 89.5mL of ethanol solution of intermediate product 3, keeping the temperature, reacting for 3h, cooling to 80 ℃, adjusting the pH value to 7 by using 0.5mol/L sodium hydroxide solution, filtering to remove the iron powder, adding ethyl acetate into filtrate, stratifying, rotationally evaporating an organic phase to 1/3 volume, and finally freeze-drying at-45 ℃ to constant weight to obtain a graft, wherein the mass fraction of the hydrochloric acid solution is 17%, and the ethanol solution of the intermediate product 3 is prepared from the intermediate product 3 and absolute ethyl alcohol according to the weight of 6.2 g: 100mL of the mixture is mixed;
step S5, dissolving 1g of humic acid and 1.5g of sodium silicate in 31.2mL of deionized water, stirring for 20min at a rotation speed of 80r/min, heating to 70 ℃, dropwise adding a hydrochloric acid solution at a speed of 4.5mL/min while stirring at a rotation speed of 500r/min, adjusting the pH to 7, adding a calcium chloride solution with a concentration of 1mol/L after precipitation, continuously stirring for 25min, filtering, washing a filter cake with deionized water for 5 times, drying at 90 ℃ to constant weight, grinding, and sieving with a 80-mesh sieve to obtain a carrier, wherein the mass fraction of the hydrochloric acid solution is 17%, and the mass ratio of the calcium chloride solution to the humic acid is 1.2: 1;
and step S6, adding 4.1g of carrier, 0.8g of EDC, 0.6g of NHS and 140mL of deionized water into a three-neck flask, stirring for 1h at room temperature, then adding 0.01mol of graft, adjusting the pH of the reaction solution to 5 by using a hydrochloric acid solution with the mass fraction of 10%, stirring for reaction for 12h at 35 ℃, filtering the reactant, washing the filter cake with deionized water for 4 times, and drying in vacuum to constant weight to obtain the porous material B.
Example 3
The invention provides a porous material B, which is prepared by the following steps:
step S1, placing 20mmol of N, N-dimethyl N-octadecylamine and 30mmol of epoxy bromopropane in a round-bottom flask, stirring for 10min, heating to 70 ℃, magnetically stirring for reaction for 2h, cooling to room temperature after the reaction is finished to generate a white solid, performing suction filtration, washing a filter cake for 5 times with anhydrous ether, and placing in a 45 ℃ oven for drying for 12h to obtain an intermediate product 1;
step S2, under the protection of nitrogen, adding 50mmol of intermediate product 1 and 110mL of tetrahydrofuran into a three-neck flask, stirring for 8min, adding 10mL of taurine aqueous solution, heating to reflux reaction for 4h under the condition of the rotation speed of 200r/min, cooling to room temperature after the reaction is finished, and performing vacuum spin-drying on the solvent to obtain an intermediate product 2, wherein the taurine aqueous solution is prepared by mixing taurine and deionized water according to the proportion of 50 mmol: 10mL of the mixture is mixed;
step S3, dissolving 20mmol of intermediate product 2 in 100mL of dichloromethane, adding 20mmol of 2-methyl-5-isocyanic acid nitrobenzene, simultaneously dropwise adding dibutyltin dilaurate as a catalyst, uniformly mixing, reacting for 3 hours at 60 ℃ under magnetic stirring, cooling to room temperature, vacuum drying the solvent, purifying the dried product in anhydrous ether, filtering, drying in an oven at 40 ℃ to constant weight to obtain an intermediate product 3, wherein dibutyltin dilaurate is 5% of the total mass of the intermediate product 2 and the 2-methyl-5-isocyanic acid nitrobenzene;
step S4, adding 0.8g of iron powder and 25mL of hydrochloric acid solution into a three-neck flask, heating to 105 ℃, reacting for 20min, adding 92.6mL of ethanol solution of intermediate product 3, keeping the temperature, reacting for 4h, cooling to 80 ℃, adjusting the pH value to 8 by using 0.5mol/L sodium hydroxide solution, filtering to remove the iron powder, adding ethyl acetate into filtrate, stratifying, rotationally evaporating an organic phase to 1/3 volume, and finally freeze-drying at-45 ℃ to constant weight to obtain a graft, wherein the mass fraction of the hydrochloric acid solution is 17%, and the ethanol solution of the intermediate product 3 is prepared from the intermediate product 3 and absolute ethyl alcohol according to the weight of 7.4 g: 100mL of the mixture is mixed;
step S5, dissolving 1g of humic acid and 1.5g of sodium silicate in 34.2mL of deionized water, stirring for 20min at the rotation speed of 100r/min, heating to 70 ℃, dropwise adding a hydrochloric acid solution at the speed of 5mL/min while stirring at the rotation speed of 500r/min under the stirring condition, adjusting the pH to 7, adding a calcium chloride solution with the concentration of 1mol/L after precipitation, continuously stirring for 30min, filtering, washing a filter cake with the deionized water for 5 times, drying at 90 ℃ to constant weight, grinding, and sieving with a 80-mesh sieve to obtain a carrier, wherein the mass fraction of the hydrochloric acid solution is 17%, and the mass ratio of the calcium chloride solution to the humic acid is 1.3: 1;
and step S6, adding 4.5g of carrier, 1g of EDC, 0.9g of NHS and 160mL of deionized water into a three-neck flask, stirring for 1h at room temperature, then adding 0.01mol of graft, adjusting the pH of a reaction solution to 6 by using a hydrochloric acid solution with the mass fraction of 10%, stirring for reaction for 12h at 35 ℃, filtering the reaction product, washing a filter cake with deionized water for 5 times, and drying in vacuum to constant weight to obtain the porous material B.
Example 4
A filter material with antibacterial and deodorizing functions is prepared by the following steps:
firstly, preparing 1g of an acid compound aqueous solution with the mass fraction of 2%, adding 0.5g of porous material A, soaking for 2 hours, taking out, and drying at 60 ℃ for 1 hour to obtain the porous material A loaded with the acid compound;
secondly, preparing 2g of 25% copper chloride aqueous solution by mass, adding 1g of porous material B, soaking for 5h, taking out, and drying at 75 ℃ for 1h to obtain the porous material B loaded with the metal salt solution liquid film;
thirdly, mixing the porous material A loaded with the acidic compound and the porous material B loaded with the liquid film of the metal salt solution according to a mass ratio of 0.2: 0.5, adding the mixture into a stirring tank, and mixing for 1h at the rotating speed of 200r/min to obtain the filter material with the antibacterial and deodorizing functions.
Wherein the acidic compound is phosphoric acid, lactic acid and adipic acid according to a mass ratio of 1: 1: 1 is prepared by mixing the components of (1),the porous material A is honeycomb ceramic particles and has a specific surface area of 800m2In g, porous material B was prepared as in example 1.
Example 5
A filter material with antibacterial and deodorizing functions is prepared by the following steps:
step one, preparing 1.5g of an acid compound aqueous solution with the mass fraction of 8%, adding 0.8g of porous material A, soaking for 3h, taking out, and drying at 60 ℃ for 2h to obtain the porous material A loaded with the acid compound;
secondly, preparing 2.5g of 30% copper chloride aqueous solution by mass fraction, adding 1.5g of porous material B, soaking for 7h, taking out, and drying at 75 ℃ for 1.5h to obtain the porous material B loaded with the metal salt solution liquid film;
thirdly, mixing the porous material A loaded with the acidic compound and the porous material B loaded with the liquid film of the metal salt solution according to a mass ratio of 0.5: 1, adding the mixture into a stirring tank, and mixing for 1.5 hours at the rotating speed of 250r/min to obtain the filter material with the antibacterial and deodorizing functions.
Wherein the acidic compound is phosphoric acid, lactic acid and adipic acid according to a mass ratio of 1: 1: 1, the porous material A is honeycomb ceramic particles, and the specific surface area is 900m2In g, porous material B was prepared as in example 2.
Example 6
A filter material with antibacterial and deodorizing functions is prepared by the following steps:
step one, preparing 2g of an acid compound aqueous solution with the mass fraction of 10%, adding 1g of porous material A, soaking for 5h, taking out, and drying at 60 ℃ for 3h to obtain the porous material A loaded with the acid compound;
secondly, preparing 3g of 40% copper chloride aqueous solution by mass, adding 2g of porous material B, soaking for 8h, taking out, and drying at 75 ℃ for 2h to obtain the porous material B loaded with the metal salt solution liquid film;
thirdly, mixing the porous material A loaded with the acidic compound and the porous material B loaded with the liquid film of the metal salt solution according to the mass ratio of 1: 5, adding the mixture into a stirring tank, and mixing for 2 hours at the rotating speed of 300r/min to obtain the filter material with the antibacterial and deodorizing functions.
Wherein the acidic compound is phosphoric acid, lactic acid and adipic acid according to a mass ratio of 1: 1: 1, the porous material A is honeycomb ceramic particles and has a specific surface area of 1200m2In g, porous material B was prepared as in example 3.
Comparative example 1
The same material as the porous material A was used for the porous material B in example 4, and the rest of the raw materials and the preparation process were unchanged.
Comparative example 2
The porous material B in the example 5 is replaced by activated alumina sold by the chemical industry Limited liability company of the great opportunity of good luck in the Jinan, and the rest of raw materials and the preparation process are unchanged.
Comparative example 3
This comparative example is the product of example 1 of the invention patent publication No. CN 109701320A.
The filters prepared in examples 4 to 6 and comparative examples 1 to 3 were subjected to a performance test:
the sterilization effect test comprises the following steps:
the degerming effect of each group of filter materials is tested according to the test method in section 1.4 of the application research on KDF filter materials in purified water of the Xironyu, wherein the water flow is controlled at 60L/h, and the test results are shown in Table 1:
TABLE 1
As can be seen from Table 1, the antibacterial performance of the filter materials of examples 4-6 is superior to that of comparative examples 1-3, which shows that the filter materials prepared by the invention have higher antibacterial performance.
And (II) formaldehyde removal performance test:
taking formaldehyde as a pollutant to carry out a static test, and the test conditions are as follows: the initial concentration of formaldehyde is 1.5 +/-0.2 ppm, the test sample is 200g, and the volume of the glass test chamber is 1m3The results are shown in Table 2 using a British PPM-400ST Formaldehyde tester:
TABLE 2
As can be seen from Table 2, the filter materials of examples 4-6 have good purification effect, high purification rate and high durability in the formaldehyde removal test process, which indicates that the filter materials prepared by the invention have excellent formaldehyde removal performance.
(III) deodorization performance:
in a 30L container, each group of filter materials was placed, ammonia gas with a mass fraction of 50% and trimethylamine gas with a mass fraction of 50% were injected, the stirring fan was turned on, and the concentration of the residual odorous gas in the container was measured after 20min, with the test results shown in table 3:
as can be seen from table 3, the deodorizing effects of the filter materials of examples 4 to 6 are superior to those of comparative examples 1 to 3, and the filter material of the present invention includes the porous material a loaded with the acidic compound and the porous material B loaded with the liquid film of the metal salt solution, and the metal copper chloride is used as the catalyst, which has a good water absorption effect, can capture water in the air to form a liquid phase on the surface of the porous material, promotes the absorption and catalytic reaction of the odor, and can better promote the absorption and decomposition of odor gases such as ammonia gas and trimethylamine under an acidic condition, so that the filter material of the present invention has a high application value in the field of air purification.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (8)
1. A preparation method of a filter material with antibacterial and deodorizing functions is characterized by comprising the following steps:
firstly, preparing an acid compound aqueous solution, adding the porous material A, soaking for 2-5h, taking out, and drying at 60 ℃ for 1-3h to obtain the porous material A loaded with the acid compound;
secondly, preparing a copper chloride aqueous solution, adding the porous material B, soaking for 5-8h, taking out, and drying at 75 ℃ for 1-2h to obtain the porous material B loaded with a metal salt solution liquid film;
thirdly, mixing the porous material A loaded with the acidic compound and the porous material B loaded with the metal salt solution liquid film for 1-2 hours to obtain the filter material with the antibacterial and deodorizing functions;
wherein, the porous material B is prepared by the following steps:
mixing the carrier, EDC, NHS and deionized water for 1h, adding the graft, adjusting the pH to 5-6 with hydrochloric acid solution, stirring and reacting at 35 ℃ for 12h, filtering, washing a filter cake, and drying to obtain the porous material B.
2. The method for preparing a filter medium with antibacterial and deodorizing functions as claimed in claim 1, wherein the mass fraction of the aqueous solution of the acidic compound in the first step is 2 to 10%.
3. The method for preparing a filter material with antibacterial and deodorizing functions as claimed in claim 1, wherein the mass fraction of the aqueous solution of copper chloride in the second step is 25 to 40%.
4. The method for preparing the filter material with antibacterial and deodorizing functions as claimed in claim 1, wherein the mass ratio of the porous material A loaded with the acidic compound to the porous material B loaded with the liquid film of the metal salt solution in the third step is 0.2 to 1: 0.5-5.
5. The method for preparing the filter material with antibacterial and deodorizing functions as claimed in claim 1, wherein the carrier is prepared by the steps of:
dissolving humic acid and sodium silicate in deionized water, stirring for 20min, heating to 70 ℃, dropwise adding a hydrochloric acid solution while stirring, adjusting the pH to 7, adding a calcium chloride solution after precipitation, stirring for 20-30min, filtering, washing a filter cake, drying, and grinding to obtain the carrier.
6. The method for preparing the filter material with antibacterial and deodorizing functions as claimed in claim 5, wherein the mass fraction of the hydrochloric acid solution is 17%, and the concentration of the calcium chloride solution is 1 mol/L.
7. The method for preparing the filter material with antibacterial and deodorizing functions as claimed in claim 1, wherein the graft is prepared by the following steps:
step S1, mixing N, N-dimethyl N-octadecylamine and epoxy bromopropane, heating to 70 ℃, magnetically stirring for reacting for 2 hours, filtering, washing a filter cake, and drying to obtain an intermediate product 1;
step S2, under the protection of nitrogen, mixing the intermediate product 1 with tetrahydrofuran, adding an aqueous solution of taurine, carrying out reflux reaction for 2-4h, cooling and then carrying out rotary evaporation to obtain an intermediate product 2;
step S3, dissolving the intermediate product 2 in dichloromethane, adding 2-methyl-5-isocyanic acid nitrobenzene, simultaneously dripping dibutyltin dilaurate, mixing, reacting for 2-3h under magnetic stirring at 60 ℃, performing vacuum spin-drying on the solvent, purifying and drying a spin-dried product to obtain an intermediate product 3;
and step S4, mixing the iron powder and the hydrochloric acid solution, heating to 105 ℃ for reaction for 20min, adding the ethanol solution of the intermediate product 3, keeping the temperature for reaction for 2-4h, cooling to 80 ℃, adjusting the pH value to 7-8 by using a sodium hydroxide solution, filtering, extracting the filtrate, carrying out rotary evaporation on the organic phase, and carrying out freeze drying to obtain the graft.
8. A filter material with antibacterial and deodorizing functions, which is prepared by the preparation method of any one of claims 1 to 7.
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| CN115785727A (en) * | 2022-12-28 | 2023-03-14 | 龙牌涂料(北京)有限公司 | Preparation method and preparation device of mineral wool board inorganic coating |
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