CN111675815A - Preparation method of antibacterial super absorbent resin - Google Patents
Preparation method of antibacterial super absorbent resin Download PDFInfo
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/126—Polymer particles coated by polymer, e.g. core shell structures
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J3/12—Powdering or granulating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/128—Polymer particles coated by inorganic and non-macromolecular organic compounds
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- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
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- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/24—Homopolymers or copolymers of amides or imides
- C08J2333/26—Homopolymers or copolymers of acrylamide or methacrylamide
Abstract
The invention provides a preparation method of an antibacterial super absorbent resin, which comprises the following steps: under the condition of stirring, atomizing and dispersing the antibacterial agent aqueous dispersion on the surface of the super absorbent resin beads to obtain the antibacterial super absorbent resin; the antibacterial agent in the antibacterial agent water dispersion liquid is selected from one or more of chitosan, aloe freeze-dried powder, polyhexamethylene guanidine hydrochloride, nano silver, nano zinc oxide and quaternary ammonium salt; the super absorbent resin beads are selected from partially hydrolyzed polyacrylamide and/or sodium polyacrylate. The invention adopts partially hydrolyzed polyacrylamide and/or sodium polyacrylate as a high water absorption resin matrix, combines the high water absorption characteristics of the matrix and utilizes the adsorption effect of the high water absorption resin on a water phase system to realize the adsorption and compounding of the antibacterial agent in the high water absorption resin beads through a simple mixed adsorption process, thereby preparing the antibacterial high water absorption resin with excellent antibacterial performance. The antibacterial rate of the antibacterial super absorbent resin to escherichia coli and staphylococcus aureus is as high as 99%.
Description
Technical Field
The invention belongs to the technical field of antibacterial resin, and particularly relates to a preparation method of antibacterial super absorbent resin.
Background
Super Absorbent Polymer (SAP) for disposable sanitary articles is mainly based on polyacrylic acid synthetic polymers, and is polymerized and appropriately crosslinked by acrylic acid and acrylamide monomers containing strong hydrophilic groups to form a three-dimensional network structure, so that water with mass more than ten times or even thousands times of the self mass can be quickly absorbed through hydration to form gel. The material has the excellent performances of large water absorption capacity, high water absorption rate, strong water retention capacity, no toxicity, no odor and the like, and is incomparable with common materials. However, disposable sanitary pads or diapers absorb a large amount of body fluids and urine during use, and they are highly susceptible to bacterial growth in a damp and warm environment. The replacement frequency of the common disposable sanitary pad is 3-6 hours, and in some special occasions, the replacement frequency of the disposable sanitary pad is 12-24 hours. The growth speed of the bacteria is extremely high, and the time for most of the bacteria to propagate one generation is 20-30 minutes, which increases exponentially. For a disposable sanitary pad which is in long-term contact with a human body, the disposable sanitary pad is a hotbed for breeding bacteria, and makes human health face huge challenges. Therefore, the development of a novel disposable protective pad with an antibacterial function has important significance for maintaining body health.
The Zhoufeng et al (Chinese invention patent, application number 201810464399.7) adopts pectin as the raw material of the paper diaper, utilizes the reaction of the pectin and ammonium salt in urine, effectively adjusts the pH value of the paper diaper absorbing the urine, discharges moisture and hot gas in time, effectively reduces the occurrence probability of eczema, and enables the skin in contact with the paper diaper to be in a comfortable environment. Its disadvantages are mainly manifested in the following two aspects: firstly, the preparation process relates to a chemical synthesis process, the process is complex to realize, and the difficulty in ensuring the stability of the product in batch production is high; in addition, the prepared paper diaper has poor antibacterial performance.
The Wanglian et al (Chinese invention patent, application number: 201910671149.5) uses a natural phellodendron extract as a reducing agent to prepare the antibacterial super absorbent resin, solves the technical problem that the reducing agent used in the existing preparation process of the silver-containing antibacterial super absorbent resin has pollution or antibacterial performance is reduced, improves the antibacterial property of the water absorbent resin, ensures that the product is safe, nontoxic and easy to degrade, and can be used in the fields of daily hygiene products and medical treatment. The Wanglian and the like provide a technical problem that a reducing agent used in the existing preparation process of the silver-containing antibacterial super absorbent resin has pollution or antibacterial performance is reduced. The defects are mainly shown in that the preparation process is complex, the requirements on process conditions are high, and the difficulty in realizing batch production is high.
Penligy et al (Chinese invention patent, application No. 201910958141.7) compound polyethylene glycol, cellulose, water and azodiisobutyronitrile to obtain polyethylene glycol crosslinked super absorbent resin gel, then add chitin and modified potassium titanate whisker into the super absorbent resin gel according to a certain proportion, mechanically stir, dry to remove water, and crush to obtain the composite super absorbent resin. The preparation process aims at solving the problems of skin irritation, poor antibacterial property and poor gel strength of the existing super absorbent resin. But the defects are mainly shown in that the preparation process is complicated, the bacteriostasis rate of the obtained antibacterial composite super absorbent resin is still lower than 70 percent, and further improved space exists.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for preparing an antibacterial super absorbent resin, which is simple and has excellent antibacterial properties.
The invention provides a preparation method of an antibacterial super absorbent resin, which comprises the following steps:
under the condition of stirring, atomizing and dispersing the antibacterial agent aqueous dispersion on the surface of the super absorbent resin beads to obtain the antibacterial super absorbent resin;
the antibacterial agent in the antibacterial agent water dispersion liquid is selected from one or more of chitosan, aloe freeze-dried powder, polyhexamethylene guanidine hydrochloride, nano silver, nano zinc oxide and quaternary ammonium salt;
the super absorbent resin beads are selected from partially hydrolyzed polyacrylamide and/or sodium polyacrylate.
Preferably, the aqueous antibacterial agent dispersion is prepared by the following method:
ultrasonically dispersing an antibacterial agent in water to obtain an antibacterial agent dispersion liquid;
the temperature of ultrasonic dispersion is 25-50 ℃, and the time of ultrasonic dispersion is 30-60 min.
Preferably, the mass concentration of the antibacterial agent dispersion liquid is 10.0 to 50.0%.
Preferably, the stirring speed is 10-100 rpm.
Preferably, the pressure of atomization and dispersion is 0.2-1.0 MPa.
Preferably, the mass ratio of the antibacterial agent to the super absorbent resin beads is 1: 1 to 99.
Preferably, the aqueous antibacterial agent dispersion is selected from a nano-silver aqueous phase dispersion with the mass concentration of 1.0%; or the mass ratio of 1: 1 of a mixture of 10.0 mass percent of chitosan aqueous dispersion and 2.0 mass percent of nano-silver aqueous dispersion; or the mass ratio of 1: 1, 10.0 mass percent of aloe freeze-dried powder aqueous dispersion and 2.0 mass percent of nano-silver aqueous dispersion.
Preferably, the antibacterial agent dispersion liquid is evenly atomized and dispersed on the surface of the super absorbent resin beads in batches.
Preferably, the number of times of dividing the batches is 5-25 batches.
The invention provides a preparation method of an antibacterial super absorbent resin, which comprises the following steps: under the condition of stirring, atomizing and dispersing the antibacterial agent aqueous dispersion on the surface of the super absorbent resin beads to obtain the antibacterial super absorbent resin; the antibacterial agent in the antibacterial agent water dispersion liquid is selected from one or more of chitosan, aloe freeze-dried powder, polyhexamethylene guanidine hydrochloride, nano silver, nano zinc oxide and quaternary ammonium salt; the super absorbent resin beads are selected from partially hydrolyzed polyacrylamide and/or sodium polyacrylate. The invention adopts partially hydrolyzed polyacrylamide and/or sodium polyacrylate as a high water absorption resin matrix, combines the high water absorption characteristics of the matrix and utilizes the adsorption effect of the high water absorption resin on a water phase system to realize the adsorption and compounding of the antibacterial agent in the high water absorption resin beads through a simple mixed adsorption process, thereby preparing the antibacterial high water absorption resin with excellent antibacterial performance. The experimental results show that: the antibacterial super absorbent resin has 99 percent of bacteriostasis rate on escherichia coli and 99 percent of bacteriostasis rate on staphylococcus aureus; the absorption capacity is 31.2-54.5 g/g; the water retention capacity is 27.3-45.8 g/g; the absorption capacity under pressure is 10.9 to 20.9 g/g.
Drawings
FIG. 1 is a process flow diagram of the preparation method of the antibacterial super absorbent resin provided by the invention;
FIG. 2 is a bacteriostatic experiment of the antibacterial super absorbent resin prepared in example 1 of the present invention on Escherichia coli;
FIG. 3 is a bacteriostatic experiment of the nano-silver composite antibacterial super absorbent resin prepared in example 4 of the present invention on Escherichia coli;
fig. 4 is a bacteriostasis experiment of the nano-silver composite antibacterial super absorbent resin prepared in embodiment 4 of the present invention on staphylococcus aureus.
Detailed Description
The invention provides a preparation method of an antibacterial super absorbent resin, which comprises the following steps:
under the condition of stirring, atomizing and dispersing the antibacterial agent aqueous dispersion on the surface of the super absorbent resin beads to obtain the antibacterial super absorbent resin;
the antibacterial agent in the antibacterial agent water dispersion liquid is selected from one or more of chitosan, aloe freeze-dried powder, polyhexamethylene guanidine hydrochloride, nano silver, nano zinc oxide and quaternary ammonium salt;
the super absorbent resin beads are selected from partially hydrolyzed polyacrylamide and/or sodium polyacrylate.
The invention adopts partially hydrolyzed polyacrylamide and/or sodium polyacrylate as a high water absorption resin matrix, combines the high water absorption characteristics of the matrix and utilizes the adsorption effect of the high water absorption resin on a water phase system to realize the adsorption and compounding of the antibacterial agent in the high water absorption resin beads through a simple mixed adsorption process, thereby preparing the antibacterial high water absorption resin with excellent antibacterial performance.
FIG. 1 is a process flow chart of the preparation method of the antibacterial super absorbent resin provided by the invention.
In the invention, the antibacterial agent in the antibacterial agent water dispersion liquid is selected from one or more of chitosan, aloe freeze-dried powder, polyhexamethylene guanidine hydrochloride, nano silver, nano zinc oxide and quaternary ammonium salt. The molecular weight of the chitosan is preferably 2000-50000; aloe freeze-dried powder: 100:1 (%), 200:1 (%), representing the concentration of the active ingredient; the mass concentration of the aqueous solution of the polyhexamethylene guanidine hydrochloride is 20 percent. The particle size of the nano silver is preferably 1-30 mu m; the particle size of the nano zinc oxide is 15-1000 nm.
In the present invention, the mass concentration of the antibacterial agent dispersion liquid is preferably 10.0 to 50.0%. The antibacterial agent dispersion liquid is preferably selected from a chitosan aqueous phase dispersion liquid with the concentration of 5.0%, an aloe freeze-dried powder aqueous phase dispersion liquid with the concentration of 50.0%, a polyhexamethylene guanidine hydrochloride antibacterial dispersion liquid with the concentration of 2%, a nano-silver aqueous phase dispersion liquid with the concentration of 1.0%, or a mixture of the components in a mass ratio of 1: 1 of a mixture of 10.0 mass percent of chitosan aqueous dispersion and 2.0 mass percent of nano-silver aqueous dispersion; or the mass ratio of 1: 1, a mixture of 10.0 mass percent of aloe freeze-dried powder aqueous dispersion and 2.0 mass percent of nano-silver aqueous dispersion; or nano zinc oxide aqueous phase dispersion liquid with the concentration of 30.0 percent; or the mass ratio of 1: 1 of a mixture of aqueous dispersion of chitosan with a concentration of 10.0% and aqueous dispersion of nano zinc oxide with a concentration of 30.0%; or the mass ratio of 1: 1, a mixture of 10.0% concentration aloe freeze-dried powder aqueous phase dispersion liquid and 30.0% concentration nano zinc oxide aqueous phase dispersion liquid; more preferably selected from aqueous nano-silver dispersions with a mass concentration of 1.0%; or the mass ratio of 1: 1 of a mixture of 10.0 mass percent of chitosan aqueous dispersion and 2.0 mass percent of nano-silver aqueous dispersion; or the mass ratio of 1: 1, 10.0 mass percent of aloe freeze-dried powder aqueous dispersion and 2.0 mass percent of nano-silver aqueous dispersion.
In the present invention, the aqueous dispersion of the antibacterial agent is preferably prepared by the following method:
ultrasonically dispersing an antibacterial agent in water to obtain an antibacterial agent dispersion liquid; the temperature of ultrasonic dispersion is 25-50 ℃, and the time of ultrasonic dispersion is 30-60 min.
The invention preferably stands the obtained aqueous phase antibacterial agent dispersion liquid at room temperature for use.
In the invention, the stirring speed is 10-100 rpm. In particular embodiments, the rate of agitation is 50rpm, 60rpm, 80rpm, or 100 rpm.
In the present invention, the superabsorbent resin beads are selected from partially hydrolyzed polyacrylamide and/or sodium polyacrylate; the saturated water absorption rate of the partially hydrolyzed polyacrylamide is 50-200 g/g. The saturated water absorption rate of the sodium polyacrylate is 500-550 g/g.
In the present invention, the mass ratio of the antibacterial agent to the super absorbent resin beads is preferably 1: 1 to 99. In a specific embodiment, the mass ratio of the antibacterial agent to the super absorbent resin beads is 1: 9; or 1: 1; or 1: 49; or 5: 44; or 3: 7; or 1: 6.
in the invention, the pressure of atomization and dispersion is 0.2-1.0 MPa. The antibacterial agent dispersion liquid is evenly atomized and dispersed on the surface of the super absorbent resin beads in batches. The number of times of the batch separation is preferably 5-25, more preferably 10-20; in specific embodiments, the number of times of dividing into batches is 10 batches, 15 batches or 20 batches.
In specific embodiments, the pressure of the atomization dispersion is 0.5MPa, 0.2MPa, 1.0MPa, 0.7MPa, or 0.9 MPa.
In the invention, the antibacterial agent aqueous dispersion is preferably atomized and dispersed on the surface of the super absorbent resin beads, stirred, collected and dried to obtain the antibacterial super absorbent resin. Oven drying is preferred for the present invention. The drying temperature is 45-55 ℃, and the drying time is 22-26 h; in a specific embodiment, the drying temperature is 50 ℃ and the drying time is 24 hours.
The antibacterial performance and the absorption performance of the antibacterial super absorbent resin prepared by the preparation method in the technical scheme are respectively evaluated by referring to GB/T20944.3-2008 and GB/T22875-2018.
In order to further illustrate the present invention, the following description will be made with reference to examples to illustrate the preparation method of an antibacterial super absorbent resin provided by the present invention, but they should not be construed as limiting the scope of the present invention.
Example 1 preparation of chitosan composite antibacterial super absorbent resin:
accurately measuring 100g of chitosan aqueous phase dispersion liquid with the concentration of 5.0%, loading the chitosan aqueous phase dispersion liquid into a storage tank of a high-pressure pump, setting the pressure of the high-pressure pump to be 0.5MPa, uniformly spraying the chitosan aqueous phase dispersion liquid on the surface of 45g of sodium polyacrylate beads with the stirring speed of 50 revolutions per minute in 10 batches, uniformly stirring, collecting the prepared chitosan composite antibacterial super absorbent resin, and placing the chitosan composite antibacterial super absorbent resin in a 50 ℃ drying oven for drying treatment for 24 hours to obtain the antibacterial super absorbent resin.
The antibacterial performance and the absorption performance of the antibacterial super absorbent resin are respectively evaluated by referring to GB/T20944.3-2008 and GB/T22875-2018, the test results are shown in Table 1, and FIG. 2 is a bacteriostasis experiment of the antibacterial super absorbent resin prepared in the embodiment 1 of the invention on Escherichia coli.
Example 2 preparation of aloe lyophilized powder composite antibacterial super absorbent resin:
accurately measuring 100g of 50.0% aloe freeze-dried powder aqueous phase dispersion, placing into a storage tank of a high-pressure pump, setting the pressure of the high-pressure pump to be 1.0MPa, uniformly spraying and dispersing on the surface of 50g of sodium polyacrylate beads with the stirring speed of 100 revolutions per minute in 20 batches, uniformly stirring, collecting the prepared aloe freeze-dried powder composite antibacterial super absorbent resin, and placing in a 50 ℃ oven for drying treatment for 24 hours to obtain the antibacterial super absorbent resin.
The antibacterial performance and the absorption performance of the antibacterial material are respectively evaluated by referring to GB/T20944.3-2008 and GB/T22875-2018, and the test results are shown in Table 1.
Example 3 preparation of polycaproylguanidine hydrochloride complex antibacterial super absorbent resin:
accurately measuring 50g of 2% polycaprolactam hydrochloride antibacterial dispersion, putting the polycaprolactam hydrochloride antibacterial dispersion into a storage tank of a high-pressure pump, setting the pressure of the high-pressure pump to be 1.0MPa, uniformly spraying the polycaprolactam hydrochloride antibacterial dispersion on the surface of 49g of sodium polyacrylate beads with the stirring speed of 100 revolutions per minute in 10 batches, uniformly stirring, collecting the prepared polycaprolactam hydrochloride composite antibacterial super absorbent resin, and putting the composite antibacterial super absorbent resin in a 50 ℃ drying oven for drying treatment for 24 hours to obtain the antibacterial super absorbent resin.
The antibacterial performance and the absorption performance of the antibacterial material are respectively evaluated by referring to GB/T20944.3-2008 and GB/T22875-2018, and the test results are shown in Table 1.
Example 4 preparation of nano-silver composite antibacterial super absorbent resin:
accurately measuring 100g of nano-silver aqueous phase dispersion with the concentration of 1.0%, loading the nano-silver aqueous phase dispersion into a storage tank of a high-pressure pump, setting the pressure of the high-pressure pump to be 0.2MPa, uniformly spraying the nano-silver aqueous phase dispersion on the surface of 49g of sodium polyacrylate beads with the stirring speed of 80 revolutions per minute in 10 batches, uniformly stirring, collecting the prepared nano-silver composite antibacterial super absorbent resin, and placing the nano-silver composite antibacterial super absorbent resin in a 50 ℃ oven for drying treatment for 24 hours to obtain the antibacterial super absorbent resin.
The antibacterial performance and the absorption performance of the resin are respectively evaluated by referring to GB/T20944.3-2008 and GB/T22875-; fig. 4 is a bacteriostasis experiment of the nano-silver composite antibacterial super absorbent resin prepared in embodiment 4 of the present invention on staphylococcus aureus.
Example 5: preparing chitosan/nano-silver composite antibacterial super absorbent resin:
accurately measuring 50g of chitosan aqueous phase dispersion liquid with the concentration of 10.0 percent and 50g of nano-silver aqueous phase dispersion liquid with the concentration of 2.0 percent, putting the chitosan aqueous phase dispersion liquid and the nano-silver aqueous phase dispersion liquid into a storage tank of a high-pressure pump, setting the pressure of the high-pressure pump to be 0.5MPa, uniformly spraying and dispersing the chitosan aqueous phase dispersion liquid on the surface of 44g of sodium polyacrylate beads with the stirring speed of 80 revolutions per minute in 10 batches, uniformly stirring, collecting the prepared chitosan/nano-silver composite antibacterial super absorbent resin, and putting the chitosan/nano-silver composite antibacterial super absorbent resin into a 50 ℃ drying oven for drying treatment for 24 hours to obtain the antibacterial super absorbent resin.
The antibacterial performance and the absorption performance of the antibacterial material are respectively evaluated by referring to GB/T20944.3-2008 and GB/T22875-2018, and the test results are shown in Table 1.
Example 6: the preparation of the aloe freeze-dried powder/nano-silver composite antibacterial super absorbent resin comprises the following steps:
accurately measuring 50g of 10.0% aloe freeze-dried powder aqueous phase dispersion liquid and 50g of 2.0% nano-silver aqueous phase dispersion liquid, putting the aloe freeze-dried powder aqueous phase dispersion liquid and the 50g of 2.0% nano-silver aqueous phase dispersion liquid into a storage tank of a high-pressure pump, setting the pressure of the high-pressure pump to be 1.0MPa, uniformly spraying and dispersing the mixture on the surface of 44g of sodium polyacrylate beads with the stirring speed of 80 revolutions per minute in 15 batches, uniformly stirring and mixing the mixture, collecting the prepared aloe freeze-dried powder/nano-silver composite antibacterial super absorbent resin, and putting the aloe freeze-dried powder/nano-silver composite antibacterial super absorbent resin into a 50.
The antibacterial performance and the absorption performance of the antibacterial material are respectively evaluated by referring to GB/T20944.3-2008 and GB/T22875-2018, and the test results are shown in Table 1.
Example 7: preparing nano zinc oxide composite antibacterial super absorbent resin:
accurately measuring 100g of nano zinc oxide aqueous phase dispersion liquid with the concentration of 30.0%, loading the nano zinc oxide aqueous phase dispersion liquid into a storage tank of a high-pressure pump, setting the pressure of the high-pressure pump to be 0.7MPa, uniformly spraying the nano zinc oxide aqueous phase dispersion liquid on the surface of 70g of sodium polyacrylate beads with the stirring speed of 60 revolutions per minute in 20 batches, uniformly stirring, collecting the prepared nano zinc oxide composite antibacterial super absorbent resin, and placing the nano zinc oxide composite antibacterial super absorbent resin in a 50 ℃ oven for drying treatment for 24 hours to obtain the antibacterial super absorbent resin.
The antibacterial performance and the absorption performance of the antibacterial material are respectively evaluated by referring to GB/T20944.3-2008 and GB/T22875-2018, and the test results are shown in Table 1.
Example 8: preparing chitosan/nano zinc oxide composite antibacterial super absorbent resin:
accurately measuring 50g of chitosan aqueous phase dispersion liquid with the concentration of 10.0 percent and 50g of nano zinc oxide aqueous phase dispersion liquid with the concentration of 30.0 percent, putting the chitosan aqueous phase dispersion liquid and the nano zinc oxide aqueous phase dispersion liquid into a storage tank of a high-pressure pump, setting the pressure of the high-pressure pump to be 0.9MPa, uniformly spraying and dispersing the chitosan aqueous phase dispersion liquid on the surface of 30g of sodium polyacrylate beads with the stirring speed of 80 revolutions per minute in 20 batches, uniformly stirring, collecting the prepared chitosan/nano zinc oxide composite antibacterial super absorbent resin, and placing the chitosan/nano zinc oxide composite antibacterial super absorbent resin in a 50 ℃ drying oven for drying treatment for 24 hours to obtain the antibacterial super absorbent resin.
The antibacterial performance and the absorption performance of the antibacterial material are respectively evaluated by referring to GB/T20944.3-2008 and GB/T22875-2018, and the test results are shown in Table 1.
Example 9: the preparation of the aloe freeze-dried powder/nano zinc oxide composite antibacterial super absorbent resin comprises the following steps:
accurately measuring 50g of 10.0% aloe freeze-dried powder aqueous phase dispersion liquid and 50g of 30.0% nano zinc oxide aqueous phase dispersion liquid, putting the aloe freeze-dried powder aqueous phase dispersion liquid and the 50g of nano zinc oxide aqueous phase dispersion liquid into a storage tank of a high-pressure pump, setting the pressure of the high-pressure pump to be 1.0MPa, uniformly spraying and dispersing the mixture on the surface of 30g of sodium polyacrylate beads with the stirring speed of 100 revolutions per minute in 20 batches, uniformly stirring and mixing, collecting the prepared aloe freeze-dried powder/nano zinc oxide composite antibacterial super absorbent resin, and placing the aloe freeze-dried powder/nano zinc oxide composite antibacterial super absorbent resin in a 50 ℃ drying oven for drying treatment for.
The antibacterial performance and the absorption performance of the antibacterial material are respectively evaluated by referring to GB/T20944.3-2008 and GB/T22875-2018, and the test results are shown in Table 1.
TABLE 1 antibacterial Properties of the composite antibacterial super absorbent resin
Refers to the absorption properties in physiological saline
The invention utilizes the adsorption effect of the commercialized water-absorbent resin material on a water phase system, realizes the compounding of the common commercialized high-absorbent resin material and the antibacterial agent through a simple mixing adsorption process, and prepares the high-absorbent resin material with excellent antibacterial performance. The invention has the main advantages that the preparation of the antibacterial super absorbent resin can be realized by simple operation process control, and the industrialized mass production can be realized.
From the above embodiments, the present invention provides a method for preparing an antibacterial super absorbent resin, comprising the following steps: under the condition of stirring, atomizing and dispersing the antibacterial agent aqueous dispersion on the surface of the super absorbent resin beads to obtain the antibacterial super absorbent resin; the antibacterial agent in the antibacterial agent water dispersion liquid is selected from one or more of chitosan, aloe freeze-dried powder, polyhexamethylene guanidine hydrochloride, nano silver, nano zinc oxide and quaternary ammonium salt; the super absorbent resin beads are selected from partially hydrolyzed polyacrylamide and/or sodium polyacrylate. The invention adopts partially hydrolyzed polyacrylamide and/or sodium polyacrylate as a high water absorption resin matrix, combines the high water absorption characteristics of the matrix and utilizes the adsorption effect of the high water absorption resin on a water phase system to realize the adsorption and compounding of the antibacterial agent in the high water absorption resin beads through a simple mixed adsorption process, thereby preparing the antibacterial high water absorption resin with excellent antibacterial performance. The experimental results show that: the antibacterial super absorbent resin has 99 percent of bacteriostasis rate on escherichia coli and 99 percent of bacteriostasis rate on staphylococcus aureus; the absorption capacity is 31.2-54.5 g/g; the water retention capacity is 27.3-45.8 g/g; the absorption capacity under pressure is 10.9 to 20.9 g/g.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A preparation method of antibacterial super absorbent resin comprises the following steps:
under the condition of stirring, atomizing and dispersing the antibacterial agent aqueous dispersion on the surface of the super absorbent resin beads to obtain the antibacterial super absorbent resin;
the antibacterial agent in the antibacterial agent water dispersion liquid is selected from one or more of chitosan, aloe freeze-dried powder, polyhexamethylene guanidine hydrochloride, nano silver, nano zinc oxide and quaternary ammonium salt;
the super absorbent resin beads are selected from partially hydrolyzed polyacrylamide and/or sodium polyacrylate.
2. The method according to claim 1, wherein the aqueous dispersion of the antibacterial agent is prepared by:
ultrasonically dispersing an antibacterial agent in water to obtain an antibacterial agent dispersion liquid;
the temperature of ultrasonic dispersion is 25-50 ℃, and the time of ultrasonic dispersion is 30-60 min.
3. The method according to claim 1, wherein the antibacterial agent dispersion liquid has a mass concentration of 10.0 to 50.0%.
4. The method according to claim 1, wherein the stirring rate is 10 to 100 rpm.
5. The production method according to claim 1, wherein the pressure of the atomized dispersion is 0.2 to 1.0 MPa.
6. The production method according to claim 1, wherein the mass ratio of the antibacterial agent to the super absorbent resin beads is 1: 1 to 99.
7. The method according to claim 1, wherein the aqueous dispersion of the antibacterial agent is selected from aqueous dispersions of nano-silver at a mass concentration of 1.0%; or the mass ratio of 1: 1 of a mixture of 10.0 mass percent of chitosan aqueous dispersion and 2.0 mass percent of nano-silver aqueous dispersion; or the mass ratio of 1: 1, 10.0 mass percent of aloe freeze-dried powder aqueous dispersion and 2.0 mass percent of nano-silver aqueous dispersion.
8. The method according to claim 1, wherein the antimicrobial dispersion liquid is uniformly dispersed on the surface of the super absorbent resin beads by atomization in batches.
9. The method according to claim 1, wherein the number of times of the divided batches is 5 to 25.
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Cited By (4)
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| CN113736200A (en) * | 2021-10-15 | 2021-12-03 | 威高集团有限公司 | Antibacterial super absorbent resin composite material and preparation method thereof |
| CN113881177A (en) * | 2021-10-15 | 2022-01-04 | 威高集团有限公司 | Antibacterial water-absorbing composite material, and preparation method and device thereof |
| CN114854161A (en) * | 2022-05-30 | 2022-08-05 | 中国科学院长春应用化学研究所 | Antibacterial and peculiar smell-removing super absorbent resin and preparation method thereof |
| CN115581792A (en) * | 2022-11-20 | 2023-01-10 | 上海护理佳实业有限公司 | Self-adhesive high-absorption material and absorption core |
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| CN115581792B (en) * | 2022-11-20 | 2023-12-19 | 上海护理佳实业有限公司 | Self-adhesive high-absorption material and absorption core |
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