CN113003644A - Environment-friendly deodorant and preparation method thereof - Google Patents
Environment-friendly deodorant and preparation method thereof Download PDFInfo
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- CN113003644A CN113003644A CN202110246167.6A CN202110246167A CN113003644A CN 113003644 A CN113003644 A CN 113003644A CN 202110246167 A CN202110246167 A CN 202110246167A CN 113003644 A CN113003644 A CN 113003644A
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
- A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
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Abstract
The invention relates to an environment-friendly deodorant and a preparation method thereof. The method comprises the steps of firstly adding beta-cyclodextrin into a water body, then adjusting the pH value of the water body by using an alkali liquor, and then adding a cationic etherifying agent for stirring. Hydrochloric acid is added to adjust the pH value, and vacuum drying is carried out. And dissolving the dried substance with N, N-dimethylformamide, filtering, precipitating the filtrate with acetone, and drying the obtained precipitate in vacuum to obtain the modified beta-cyclodextrin. Defibering the plant fiber to prepare a fiber suspension. The fiber suspension was ground in a colloid mill in a circulation. Homogenizing with a high-pressure homogenizer to obtain the nanometer microfibril. Adding nano microfibril into water, adding modified beta-cyclodextrin and water-soluble chitosan, stirring, and finally performing ultrasonic treatment by using an ultrasonic cleaner to obtain the environment-friendly deodorant. The raw materials of the environment-friendly deodorant are natural polymer materials. The raw materials have the characteristics of simplicity, easy obtainment, reproducibility and the like, and also have the characteristics of biodegradability and environmental friendliness.
Description
Technical Field
The invention belongs to the technical field of deodorant preparation, and particularly relates to an environment-friendly deodorant and a preparation method thereof.
Background
Malodorous gases are a problem of widespread concern at present, and great efforts are being made to control odor emissions in an attempt to reduce the impact of the odor on the environment and human body. The foul smell generated in industrial production, garbage treatment, municipal sewage and the like is particularly strong in the industrial production, such as paper mills, dye plants, rubber plants, pharmaceutical plants, pesticide plants, plastic plants, paint plants and the like. At present, it is difficult to treat exhaust gas which can be sensed by human body. The malodorous gas has complicated types, such as Volatile Organic Compounds (VOCs) and hydrogen sulfide (H)2S) and ammonia (NH)3) And the emission of these gases causes problems of greenhouse effect, acid rain and ozone depletion to the environment, and people who have been exposed to these gases for a long time may have symptoms of headache, nausea, vomiting, etc.
In order to reduce the emission of such malodorous gases, the malodorous gases are usually collected and then treated by physical, chemical, biological, etc. Physical methods include adsorption, condensation, water washing, and the like; chemical methods include thermal oxidation, catalytic oxidation, ozone oxidation, and the like; the biological method comprises a biological filter, a biological washer, a biological trickling filter and the like. Although the malodorous gas can be largely removed by one or more of the above-mentioned methods, it is limited only to the terminal treatment of the malodorous gas. Therefore, the purpose of removing the malodorous gas can be achieved by a source treatment method.
Chinese patent document CN 108392982 a discloses a deodorant which can directly act on the surface of a smelly body to effectively prevent the emission of malodor, and a preparation method and a use method thereof. The deodorant solution A comprises the following components in percentage by weight: 20% of polyvinyl alcohol, 7% of glutaraldehyde, 1% of nano titanium dioxide, 4% of sodium dodecyl benzene sulfonate and 68% of water. The deodorizing liquid B comprises the following components in percentage by weight: 10% of ferric trichloride, 4% of copper dichloride, 2% of hydrochloric acid and 84% of water. When in use, the deodorant solution A is diluted by 5-15 times and then added with the deodorant solution B with the same volume for mixing, and after mixing, the mixture is directly sprayed or after standing for 0.5-2h, the mixture is sprayed.
Chinese patent document CN 111892261A discloses a sludge deodorant for an urban sewage treatment plant, which is prepared by mixing the following materials in percentage by mass: 2-8% of light rare earth, 3-9% of magnesia, 4-10% of ferrous chloride, 5-11% of magnesium sulfite, 8-15% of potassium manganate, 20-30% of charcoal powder and 30-45% of bentonite. The deodorant has multiple functions of sterilization, disinfection and deodorization, can continuously and stably play a role, obviously improves the environment and eliminates potential safety hazards; the deodorant disclosed by the invention is simple to prepare, has no adverse effect on sludge, and is convenient for subsequent treatment and disposal of the sludge.
Although the above-mentioned patent has a certain effect of eliminating malodorous gases, some heavy metal ions (such as copper) added therein will have a certain effect on the environment, if sludge and waste water containing heavy metal ions are used as fertilizers and for irrigating farmlands, soil will be polluted, heavy metal ions in crops and aquatic organisms will be enriched after entering water, and serious harm will be caused to human body through food chain.
In order to solve the problems that the existing deodorant is not environment-friendly, has a narrow application range, has a poor malodorous gas removal effect and the like, the invention provides the environment-friendly deodorant and the preparation method thereof, which inhibit the generation of malodorous gas in a physical mode and simultaneously inhibit the growth and reproduction of microorganisms, thereby effectively solving the generation of malodorous gas.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problems that the existing deodorant is not environment-friendly enough in raw materials, poor in removing effect of malodorous gas in circulating water, low in efficiency of common deodorization methods and the like, an environment-friendly deodorant and a preparation method thereof are provided.
The technical scheme adopted by the invention for solving the technical problem is as follows:
an environment-friendly deodorant comprises the following components:
the above are all mass percentages.
Furthermore, the alkali liquor used in the preparation process of the modified beta-cyclodextrin is one or two of sodium hydroxide and potassium hydroxide.
Furthermore, the cationic etherifying agent used in the preparation process of the modified beta-cyclodextrin is one or two of 2, 3-epoxypropyltrimethylammonium chloride and 3-chloro-2-hydroxypropyl-trimethylammonium chloride.
Furthermore, the plant fiber used in the preparation process of the nano microfibril is one or more of softwood fiber, hardwood fiber and cotton fiber.
Furthermore, the water-soluble chitosan is one or more of carboxymethyl chitosan, chitosan quaternary ammonium salt and chitosan hydrochloride.
The preparation method of the deodorant comprises the following specific steps:
the following are in terms of mass fraction.
(1) Heating 100 parts of water to 40-80 ℃, adding 5-30 parts of beta-cyclodextrin, adjusting the pH value of the water body to 8-11 by using 30% alkali liquor by mass fraction, and stirring for 5-15min by using a stirrer. Then adding 4-25 parts of cationic etherifying agent, stirring for 2-5min by a stirrer at the rotating speed of 300-1000r/min, and then oscillating for 5-15min by a 300kHz ultrasonic cleaning instrument. Then heating for 2-10min by microwave with frequency of 2450MHz, standing for 5-10min, adding hydrochloric acid, and adjusting pH to 6.5-7.0. The solution is dried under vacuum at 60-80 ℃ for 8-15h, and the obtained dried substance is dissolved by 10-25 parts of N, N-dimethylformamide. Adding 100-300 parts of acetone into the solution, and drying the obtained precipitate in vacuum at 40-60 ℃ for 10-20h to obtain the modified beta-cyclodextrin.
The design mechanism of the step is as follows: the beta-cyclodextrin before modification is better dissolved in water by adjusting the temperature and the pH value of the water body and matching with a stirrer. After the cationic etherifying agent is added into the water body, the cationic etherifying agent is uniformly dispersed in the water body by using a stirrer and ultrasonic cleaning instrument two-step method. The application of the stirrer lies in macroscopic mixing, the energy consumption lies in the flowing of liquid, the application of the ultrasonic cleaning instrument lies in microscopic mixing, the liquid generates small bubbles with tens of thousands of microns to vibrate mutually, the energy consumption lies in the vibration of the liquid, and the two steps of stirring and ultrasonic vibration are combined to better mix the liquid and save energy. The microwave is applied on a molecular level, the microwave heating can accelerate the reaction of the cationic etherifying agent and the beta-cyclodextrin, the electromagnetic field generated by the microwave polarizes the molecules, and the relative motion between the polarized molecules can generate the effects like friction, collision, extrusion and the like, so the microwave heating device has the advantages of uniform heating, short heating time, convenient control, low energy consumption and the like. Vacuum drying is selected in order to keep the original characteristics of the obtained solid, and because the vacuum drying is in a negative pressure state to isolate air, the oxidation effect of oxygen on materials during temperature rise is reduced.
(2) 100 parts of water is taken, 0.5-1.5 parts of plant fiber is added, and defibering is carried out by using a defibering machine, wherein the rotational speed of defibering is 10000-50000 turns, and fiber suspension is prepared. Then, the fiber suspension was cyclically ground in a colloid mill for 10-40 min. Then, it is concentrated to 1.5% -2.5% aqueous suspension, and then homogenized at high pressure for 2-5 times under pressure 300-700bar and 3-6 times under pressure 1000-1200bar to obtain the nano microfibrils (CNF).
(3) Adding 2.5-3.5% of nano microfibril (relative to the mass of the water body) into water, keeping the stirring state, then adding 1.5-8.5% of modified beta-cyclodextrin (relative to the mass of the water body) and 2-5% of water-soluble chitosan (relative to the mass of the water body), and further stirring for 5-15 min. And then ultrasonically treating the mixture in an ultrasonic cleaner with the frequency of 200kHz for 30-90min to uniformly disperse the mixture, thus obtaining the environment-friendly deodorant.
The principle of the method of the invention is as follows:
beta-cyclodextrin is an organic compound consisting of molecules of 7 glucose units, each of which is bonded to form a ring by a 1, 4-glycosidic bond. The cyclodextrin adsorption material has a structure outline of a truncated cone, the interior of the cyclodextrin adsorption material is of a cavity structure, and organic molecules, inorganic ions, gas molecules and the like can be adsorbed due to the hydrophilic inner cavity hydrophobic characteristic of the outer edge of cyclodextrin. The invention utilizes the adsorbability of beta-cyclodextrin to adsorb malodorous gas, thereby achieving the aim of deodorization.
The nanofibrils, which are one type of nanocellulose, are composed of beta-1, 4 linked D-glucans, and may contain varying numbers of glucose units, varying from hundreds to tens of thousands. Microfibrils are composed of approximately 30-100 cellulose molecules arranged in parallel, and have a large number of hydrogen bonds between cellulose chains, so that they have high stability and resistance to chemical degradation. The invention uses the stability of the nano microfibril as the carrier of the deodorant, and has environmental compatibility.
The basic constituent unit of chitosan is glucosamine, and chitosan disaccharide is the sugar unit of the basic structure of chitosan. The chitosan is a product of natural polysaccharide chitin with partial acetyl removed, and has the characteristics of biodegradability, biocompatibility, nontoxicity, bacteriostasis and the like. The chitosan can only be dissolved in some dilute inorganic acid or organic acid, but can not be directly dissolved in water, and the water-soluble chitosan can be well dissolved in water, so that the invention utilizes the non-toxicity, bacteriostasis and water body compatibility of the water-soluble chitosan as a natural bacteriostat to inhibit the growth and reproduction of water body bacteria so as to inhibit the generation of malodorous gas.
The solubility of beta-cyclodextrin in water is low, and the beta-cyclodextrin cannot be loaded on cellulose, so that the adsorption and inhibition effects of the beta-cyclodextrin on malodorous gases are limited to a certain extent. Therefore, the invention modifies the beta-cyclodextrin to obtain the cation modified beta-cyclodextrin with uniform substitution degree and good stability, which is well dissolved in water and can be uniformly combined with the nano microfibril, and simultaneously, the adsorption effect on malodorous molecules is ensured.
The surface of the nano microfibril contains a large amount of hydroxyl groups, and the nano microfibril can well exist in water. In addition, the nano microfibrils are electronegative and can be naturally combined with cation modified beta-cyclodextrin and positively charged water-soluble chitosan.
The inventor utilizes the characteristic to load the modified beta-cyclodextrin and the water-soluble chitosan on the surface of the stable nano microfibril. Can effectively adsorb the release of malodorous gas in the water body and simultaneously inhibit the growth and the propagation of microorganisms in the water body, thereby effectively improving the deodorizing and sterilizing effects of the liquid deodorant.
The invention has the beneficial effects that:
(1) the raw materials used by the environment-friendly deodorant are natural polymer materials which have similar glucose basic molecular structures and are saccharides which are most widely distributed and contained in nature. The raw materials have the characteristics of simplicity, easy obtainment, reproducibility and the like, and have the characteristics of biodegradability and environmental friendliness.
(2) The invention carries out cation modification on beta-cyclodextrin to obtain modified beta-cyclodextrin with better hydrophilicity and electronegativity, and achieves the aim of deodorization by utilizing the adsorption effect of the beta-cyclodextrin on malodorous molecules. The uniformity and the stability of the modified beta-cyclodextrin are utilized to improve the dispersion performance of the nano microfibrils, and the uniformity and the stability of the nano microfibrils, the modified beta-cyclodextrin and the water-soluble chitosan are improved, so that the deodorization effect is further improved.
(3) The invention utilizes the dissolubility and electropositivity of the water-soluble chitosan to be well dissolved in water and adsorbed on the fiber. The effect of inhibiting the growth of microorganisms in the water body is achieved by utilizing the bacteriostatic property of the chitosan.
(4) The invention utilizes the stability of the nano microfibril as an adsorption carrier and also utilizes the characteristic that the nano microfibril is electronegative to stably adsorb the modified beta-cyclodextrin and the water-soluble chitosan.
(5) According to the invention, the modified beta-cyclodextrin, the water-soluble chitosan and the nano microfibril are mixed according to a corresponding proportion so as to be organically combined, so that respective advantages are fully exerted, the malodorous gas in the water body is stably adsorbed and effectively inhibited from being released, and the generation of malodorous molecules is inhibited from the source.
(6) The product of the invention has better chemical stability and biocompatibility, does not produce secondary pollution to water, can be biodegraded in the wastewater treatment process, and has wide application prospect in the field of malodorous gas treatment of circulating water.
(7) The deodorant is suitable for being applied to circulating water in the papermaking production process, is safe and non-toxic, does not influence human health, and can improve the papermaking production efficiency.
Detailed Description
The technical scheme of the invention is as follows:
(1) heating 100 parts of water to 40-80 deg.C, adding 5-30 parts of beta-cyclodextrin, adjusting pH to 8-11 with 30% alkali solution (such as sodium hydroxide and potassium hydroxide), and stirring with a stirrer for 5-15 min. Then adding 4-25 parts of cationic etherifying agent (such as 2, 3-epoxypropyltrimethylammonium chloride and 3-chloro-2-hydroxypropyl-trimethylammonium chloride), stirring with a stirrer at the rotation speed of 300-1000r/min for 2-5min, and then oscillating with a 300kHz ultrasonic cleaning instrument for 5-15 min. Then heating for 2-10min by microwave with frequency of 2450MHz, standing for 5-10min, adding hydrochloric acid, and adjusting pH to 6.5-7.0. The solution is dried under vacuum at 60-80 ℃ for 8-15h, and the obtained dried substance is dissolved by 10-25 parts of N, N-dimethylformamide. Adding 100-300 parts of acetone into the solution, and drying the obtained precipitate in vacuum at 40-60 ℃ for 10-20h to obtain the modified beta-cyclodextrin.
(2) Taking 100 parts of water, adding 0.5-1.5 parts of plant fiber (such as softwood fiber, hardwood fiber and cotton fiber), and defibering with a defibering machine at a defibering rotation speed of 10000 plus 50000 turns to obtain a fiber suspension. Then, the fiber suspension was cyclically ground in a colloid mill for 10-40 min. Then, it is concentrated to 1.5% -2.5% aqueous suspension, and then homogenized at high pressure for 2-5 times under pressure 300-700bar and 3-6 times under pressure 1000-1200bar to obtain the nano microfibrils (CNF).
(3) Adding 0.1-1.5% of nano microfibril relative to the mass of the water body into the water, keeping the stirring state, then adding 1.5-8.5% of modified beta-cyclodextrin relative to the mass of the water body and 2-5% of water-soluble chitosan (which can be carboxymethyl chitosan, chitosan quaternary ammonium salt and chitosan hydrochloride) relative to the mass of the water body, and stirring for 5-15 min. And then ultrasonically treating the mixture in an ultrasonic cleaner with the frequency of 200kHz for 30-90min to uniformly disperse the mixture, thus obtaining the environment-friendly deodorant.
Example 1
The first step is as follows: heating 100 parts of water to 60 ℃, adding 20 parts of beta-cyclodextrin, adjusting the pH value of the water body to 10 by using 30 mass percent of sodium hydroxide, and stirring for 10min by using a stirrer. Then 20 parts of cationic etherifying agent 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride is added, stirred for 4min by a stirrer at the rotating speed of 800r/min and then vibrated for 10min by a 300kHz ultrasonic cleaning instrument. Then heating for 6min by microwave with frequency of 2450MHz, standing for 8min, adding hydrochloric acid, and adjusting pH to 6.9. The solution was dried under vacuum at 70 ℃ for 10 hours, and the resulting dried product was dissolved in 20 parts of N, N-dimethylformamide. Adding 200 parts of acetone into the dissolved solution, and drying the obtained precipitate in vacuum at 50 ℃ for 15 hours to obtain the modified beta-cyclodextrin.
The second step is that: 100 parts of water is taken, 1 part of hardwood fibers are added, and defibering is carried out by using a defibering machine, wherein the rotational speed of the defibering is 20000 revolutions, so as to prepare the fiber suspension. The fiber suspension was then ground in a colloid mill for 25 min. Then, it was concentrated to a 2% aqueous suspension, followed by high-pressure homogenization 3 times at a pressure of 400bar and 4 times at 1100bar to obtain nanofibrils (CNF).
The third step: adding 1% of nano microfibril relative to the mass of the water body into the water, keeping the stirring state, then adding 5% of modified beta-cyclodextrin relative to the mass of the water body and 4% of chitosan quaternary ammonium salt relative to the mass of the water body, and stirring for 10 min. And then carrying out ultrasonic treatment in an ultrasonic cleaner with the frequency of 200kHz for 60min to uniformly disperse the mixture, thus obtaining the environment-friendly deodorant.
Example 2
The first step is as follows: heating 100 parts of water to 40 ℃, adding 5 parts of beta-cyclodextrin, adjusting the pH value of the water body to 8 by using 30 mass percent of sodium hydroxide, and stirring for 5min by using a stirrer. Then 4 parts of cationic etherifying agent 2, 3-epoxypropyl trimethyl ammonium chloride is added, stirred for 2min by a stirrer at the rotating speed of 300r/min, and then vibrated for 5min by a 300kHz ultrasonic cleaning instrument. Heating with microwave frequency of 2450MHz for 2min, standing for 5min, adding hydrochloric acid, and adjusting pH to 6.5. The solution was dried under vacuum at 60 ℃ for 8 hours, and the resulting dried product was dissolved in 10 parts of N, N-dimethylformamide. And adding 100 parts of acetone into the dissolved solution, and drying the obtained precipitate at 40 ℃ for 10 hours in vacuum to obtain the modified beta-cyclodextrin.
The second step is that: 100 parts of water is taken, 0.5 part of softwood fiber is added, a fluffer is used for fluffing, the fluffing rotating speed is 10000 revolutions, and the fiber suspension is prepared. The fiber suspension was then ground in a colloid mill for 10 min. Then, it was concentrated to a 1.5% aqueous suspension, followed by high-pressure homogenization 2 times at a pressure of 300bar and 3 times at 1000bar to obtain nanofibrils (CNF).
The third step: adding 0.1% of nano microfibril relative to the mass of the water body into the water, keeping the stirring state, then adding 1.5% of modified beta-cyclodextrin relative to the mass of the water body and 2% of carboxymethyl chitosan relative to the mass of the water body, and stirring for 5 min. And then carrying out ultrasonic treatment in an ultrasonic cleaner with the frequency of 200kHz for 30min to uniformly disperse the mixture, thus obtaining the environment-friendly deodorant.
Example 3
The first step is as follows: heating 100 parts of water to 80 ℃, adding 30 parts of beta-cyclodextrin, adjusting the pH value of the water body to 11 by using 30 mass percent of potassium hydroxide, and stirring for 15min by using a stirrer. Then adding 25 parts of cationic etherifying agent 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride, stirring for 5min by a stirrer at the rotating speed of 1000r/min, and then oscillating for 15min by a 300kHz ultrasonic cleaning instrument. Then heating for 10min by microwave with frequency of 2450MHz, standing for 10min, adding hydrochloric acid, and adjusting pH to 7.0. The solution was dried under vacuum at 80 ℃ for 15 hours, and the resulting dried product was dissolved in 25 parts of N, N-dimethylformamide. And adding 300 parts of acetone into the dissolved solution, and drying the obtained precipitate at 60 ℃ for 20 hours in vacuum to obtain the modified beta-cyclodextrin.
The second step is that: 100 parts of water is taken, 1.5 parts of cotton fiber is added, and defibering is carried out by using a defibering machine, wherein the rotational speed of the defibering is 50000 turns, so as to prepare the fiber suspension. The fiber suspension was then ground in a colloid mill for 40 min. Then, it was concentrated to a 2.5% aqueous suspension, followed by high-pressure homogenization 5 times at a pressure of 700bar and 6 times at 1200bar to obtain nanofibrils (CNF).
The third step: adding 1.5% of nano microfibril relative to the mass of the water body into the water, keeping the stirring state, then adding 8.5% of modified beta-cyclodextrin relative to the mass of the water body and 5% of chitosan hydrochloride relative to the mass of the water body, and stirring for 15 min. And then ultrasonically treating the mixture in an ultrasonic cleaner with the frequency of 200kHz for 90min to uniformly disperse the mixture, thus obtaining the environment-friendly deodorant.
Comparative example 1
The preparation process is based on example 1, with the difference that: the beta-cyclodextrin used was unmodified and no water-soluble chitosan was added. The feed consists of the following raw materials: 5% beta-cyclodextrin, 3% nanofibrils and 100% water.
Comparative example 2
The preparation process is based on example 1, with the difference that: no water-soluble chitosan was added. The feed consists of the following raw materials: 5% of modified beta-cyclodextrin, 3% of nano microfibril and 100% of water.
Comparative example 3
The preparation process is based on example 1, with the difference that: no modified beta-cyclodextrin was added. The feed consists of the following raw materials: 3% of nano microfibrils, 4% of water-soluble chitosan and 100% of water.
Comparative example 4
The preparation process is based on example 1, with the difference that: the added beta-cyclodextrin is unmodified. The feed consists of the following raw materials: 5% of beta-cyclodextrin, 3% of nano microfibril, 4% of water-soluble chitosan and 100% of water.
Deodorization effect experiment:
the method comprises the steps of taking off the off-net white water in the bobbin paper making process of certain paper making enterprises in Zhejiang, allowing the off-net white water to exist in a closed container, and allowing malodorous gas released by the off-net white water to pass through a pump-suction type VOC gas detector, a pump-suction type hydrogen sulfide detector and a pump-suction type ammonia gas detector. The deodorizers prepared in the above examples and comparative examples were added to the malodor white water in the same amount. The measurement results are shown in table 1.
TABLE 1 comparison of malodorous gas removal effect of deodorizer
As can be seen from Table 1, in comparative examples 1 to 3, example 1 of the present invention has a relatively good deodorizing effect. The example 1 and the comparative examples 1 to 4 show that the deodorization effect of the modified beta-cyclodextrin is better than that of the unmodified beta-cyclodextrin, the deodorization effect of the added beta-cyclodextrin is better than that of the added water-soluble chitosan, and the deodorization effect of the beta-cyclodextrin loaded on the nano microfibrils and the water-soluble chitosan is better than that of the beta-cyclodextrin or the water-soluble chitosan loaded on the nano microfibrils alone. In the embodiment, the combination of the modified beta-cyclodextrin, the nano microfibril and the water-soluble chitosan is adopted, the deodorization effect is obviously superior to that of other combinations in a comparative example, and the formula disclosed by the invention is preferable, so that the advantages of all raw materials can be well exerted, and a good deodorization and bacteriostasis effect can be achieved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content disclosed above into an equivalent embodiment with equivalent changes, but all those simple modifications, equivalent changes and modifications made on the above embodiment according to the technical spirit of the present invention still belong to the protection scope of the present invention.
Claims (9)
1. An environment-friendly deodorant is characterized in that: comprises the following components:
1.5-8.5 parts of modified beta-cyclodextrin;
0.1-1.5 parts of nano microfibril;
2-5 parts of water-soluble chitosan;
100 parts of water;
wherein the modified beta cyclodextrin is dissolved in water and uniformly combined with the nano microfibrils, and is prepared as follows:
heating 100 parts of water to 40-80 ℃, adding 5-30 parts of beta-cyclodextrin, adjusting the pH value of the water to 8-11 by using alkali liquor, and stirring for 5-15min by using a stirrer;
adding 4-25 parts of cationic etherifying agent, stirring for 2-5min by a stirrer at the rotation speed of 300-1000r/min, oscillating for 5-15min by an ultrasonic cleaning instrument, heating for 2-10min by microwave, standing for 5-10min, adding hydrochloric acid, and adjusting the pH value to 6.5-7.0;
vacuum drying the solution at 60-80 deg.C for 8-15h, and dissolving the obtained dried product with 10-25 parts of N, N-dimethylformamide;
adding 100-300 parts of acetone into the solution, and drying the obtained precipitate in vacuum at 40-60 ℃ for 10-20h to obtain the modified beta-cyclodextrin.
2. An environment-friendly deodorant according to claim 1, characterized in that: the alkali liquor is one or two of sodium hydroxide and potassium hydroxide.
3. An environment-friendly deodorant according to claim 1, characterized in that: the cationic etherifying agent is one or two of 2, 3-epoxypropyltrimethylammonium chloride and 3-chloro-2-hydroxypropyl-trimethylammonium chloride.
4. An environment-friendly deodorant according to claim 1, characterized in that: the water-soluble chitosan is one or more of carboxymethyl chitosan, chitosan quaternary ammonium salt and chitosan hydrochloride.
5. A method of preparing a deodorant characterized by:
heating 100 parts of water to 40-80 ℃, adding 5-30 parts of beta-cyclodextrin, regulating the pH value of the water to 8-11 by using alkali liquor, and stirring for 5-15min by using a stirrer; then adding 4-25 parts of cationic etherifying agent, stirring for 2-5min by a stirrer at the rotating speed of 300-1000r/min, and then oscillating for 5-15min by a 300kHz ultrasonic cleaning instrument; then heating for 2-10min by microwave, standing for 5-10min, adding hydrochloric acid, and adjusting pH to 6.5-7.0; vacuum drying the solution at 60-80 deg.C for 8-15h, and dissolving the obtained dried product with 10-25 parts of N, N-dimethylformamide; adding 100-300 parts of acetone into the dissolved solution, and drying the obtained precipitate in vacuum at 40-60 ℃ for 10-20h to obtain modified beta-cyclodextrin;
taking 100 parts of water, adding 0.5-1.5 parts of plant fiber, and using a fluffer to fluff, wherein the fluffing rotating speed is 10000-; then, circularly grinding the fiber suspension in a colloid grinder for 10-40 min; then, concentrating the solution to be 1.5-2.5% aqueous suspension, and then homogenizing for 2-5 times under the pressure of 300-700bar and 3-6 times under the pressure of 1000-1200bar to obtain the nano microfibril;
adding 0.1-1.5% of nano microfibril relative to the mass of the water body into water, keeping the stirring state, then adding 1.5-8.5% of modified beta-cyclodextrin relative to the mass of the water body and 2-5% of water-soluble chitosan relative to the mass of the water body, and stirring for 5-15 min; and then ultrasonically treating the mixture in an ultrasonic cleaner with the frequency of 200kHz for 30-90min to uniformly disperse the mixture, thus obtaining the environment-friendly deodorant.
6. A method of preparing a deodorant according to claim 1 wherein: the alkali liquor is one or two of sodium hydroxide and potassium hydroxide.
7. A method of preparing a deodorant according to claim 1 wherein: the cationic etherifying agent is one or two of 2, 3-epoxypropyltrimethylammonium chloride and 3-chloro-2-hydroxypropyl-trimethylammonium chloride.
8. A method of preparing a deodorant according to claim 1 wherein: the plant fiber is one or more of softwood fiber, hardwood fiber and cotton fiber.
9. A method of preparing a deodorant according to claim 1 wherein: the water-soluble chitosan is one or more of carboxymethyl chitosan, chitosan quaternary ammonium salt and chitosan hydrochloride.
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