CN113981619A - Nano antibacterial non-woven fabric filter material and preparation method thereof - Google Patents
Nano antibacterial non-woven fabric filter material and preparation method thereof Download PDFInfo
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- CN113981619A CN113981619A CN202111390515.3A CN202111390515A CN113981619A CN 113981619 A CN113981619 A CN 113981619A CN 202111390515 A CN202111390515 A CN 202111390515A CN 113981619 A CN113981619 A CN 113981619A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/103—Agents inhibiting growth of microorganisms
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/43—Acrylonitrile series
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/4358—Polyurethanes
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43838—Ultrafine fibres, e.g. microfibres
Abstract
The invention belongs to the field of functional textiles and provides a nano antibacterial non-woven fabric filter material and a preparation method thereof. Firstly, preparing a black talc/chitosan/silver composite material, mixing the composite material with a polymer for pulping, and preparing the nano antibacterial non-woven fabric by using an electrostatic spinning process. The compounding and immobilization of the antibacterial additive material in the prepared nano antibacterial non-woven fabric filter material enables the silver nanoparticles to be completely loaded on the surface of the nano antibacterial non-woven fabric filter material, the bacteriostasis rate of the nano antibacterial non-woven fabric filter material on escherichia coli, staphylococcus aureus and candida albicans is greater than 97%, the loss of the antibacterial material is effectively overcome, good biocompatibility and antibacterial and bactericidal capability are maintained for a long time, the service life of the antibacterial non-woven fabric filter material is prolonged, and the process is simple and easy for industrial production.
Description
Technical Field
The invention belongs to the field of functional textiles, and particularly relates to an antibacterial non-woven fabric filter material and a preparation method thereof.
Background
With the improvement of living standard and the enhancement of health consciousness of people, particularly over the past years of various popular viruses, the market demand for antibacterial nonwoven materials is rapidly increased, higher requirements are also put forward on the antibacterial performance of the nonwoven materials, and the development of the nonwoven materials with good antibacterial and bacteriostatic performance is one of the hot spots in the field of the current nonwoven fabrics. On one hand, the antibacterial non-woven fabric is used as a protective material in the medical industry, provides a safe and secure guarantee for the healthy life of human beings, and can protect the human beings from being invaded by a large number of pathogenic bacteria, viruses and other harmful bacteria, and on the other hand, the antibacterial non-woven fabric is used as a flexible material with a plurality of holes and has natural compatibility with most tissues of organisms. Therefore, the filter material with the bactericidal effect plays an important role in the daily life of people.
The functional fiber and antibacterial non-woven fabric product can be developed by compounding or synthesizing the nano material and the traditional material. The prior silver inorganic antibacterial filter material has certain sterilization and antibacterial effects. However, when the product meets water in the using process, silver ions in the fibers can be separated out and lost, so that the antibacterial and bactericidal effects of the product are greatly reduced. The inorganic antibacterial material is loaded by other materials, so that the loss of the inorganic antibacterial material can be effectively prevented. Among them, most of the currently used carriers are synthetic porous materials, which have high production cost and complex preparation method. Black talc is a magnesium-rich silicate mineral clay with excellent chemical stability, large specific surface area, suitable pore structure and surface structure. Particularly, the black talc lamella contains metal ions such as copper and nickel, so that the black talc lamella also has excellent antibacterial performance, is expected to be widely applied as a new high-performance material as an antibacterial carrier, and provides a new idea for research, development, application and popularization of antibacterial materials and antibacterial non-woven fabric filter materials.
Disclosure of Invention
Aiming at the defects that silver ions in the antibacterial non-woven fabric are easy to run off when meeting water, the cost is high and the like in the prior art, the invention provides a nano antibacterial non-woven fabric filter material and a preparation method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the invention provides a nano antibacterial non-woven fabric filter material which is prepared by the following method:
(1) preparation of black talc/chitosan silver-carrying antibacterial additive material
Under the stirring condition, dissolving chitosan in water, adding a black talc nano material, controlling the pH value to be 3-5 (preferably 4), stirring and reacting at 60-90 ℃ for 12-18 h (preferably 60-70 ℃ for 15-17 h), adding silver nitrate, reacting at 70-80 ℃ for 2-5 h (preferably 75 ℃ for 3-4 h), cooling the obtained reaction liquid to room temperature, centrifuging, washing the obtained precipitate (deionized water), and drying at 60-80 ℃ to obtain the black talc/chitosan silver-loaded antibacterial addition material; the mass ratio of the chitosan to the black talc nano material to the silver nitrate is 1:0.1-0.5:1-3 (preferably 1:0.3: 2.72);
(2) pulping and electrostatic spinning:
adding the black talc/chitosan silver-loaded antibacterial additive material in the step (1) into an organic solvent solution of a polymer with the mass concentration of 5-20 wt% (preferably 15-20 wt%), so as to obtain spinning slurry; carrying out electrostatic spinning (preferably, carrying out electrostatic spinning under the conditions that the ambient temperature is 25-30 ℃ and the ambient humidity is 35-40%) at the ambient temperature of 25-30 ℃, wherein the aluminum foil receives spinning trickle, and the spinning trickle is solidified on the aluminum foil to obtain the nano antibacterial non-woven fabric filter material; in the organic solvent solution of the polymer, the polymer is one or a mixture of more of polyacrylonitrile, polyurethane and polystyrene (preferably polyacrylonitrile or polyurethane), and the organic solvent is one or a mixture of more of N, N-dimethylformamide, N-dimethylacetamide, N-methylpyrrolidone and acetone (preferably N, N-dimethylformamide); the mass ratio of the polymer contained in the organic solvent solution of the polymer to the black talc/chitosan silver-loaded antibacterial additive material is 50-200: 1 (preferably 100-200: 1).
Further, the black talc nano material in the step (1) is obtained by the following method: adding absolute ethyl alcohol into black talc (in Guangfeng region of Shanghai city in Jiangxi province), carrying out wet ball milling for 5-10 h at 600r/min, washing with water, centrifuging, drying at (50-80 ℃), adding the obtained black talc nanoparticles into deionized water at 20-30 ℃, vigorously stirring for one week, fully stripping, centrifuging, and drying at (60-90 ℃), wherein the particle size of the black talc nanoparticles is 5-500 nm.
Specifically, the volume of the absolute ethyl alcohol is 1-2 mL/g (preferably 1.6mL/g) based on the mass of the black talc. The volume of the deionized water is 0.2-1L/g (preferably 0.45L/g) based on the mass of the black talc nano particles.
Further, the volume of the water in the step (1) is 100-500 mL/g (preferably 200mL/g) based on the mass of the chitosan.
Further, the electrostatic spinning conditions are as follows: the receiving distance is 5-100 cm, the spinning voltage is 10-70 kV, and the extrusion rate is 0.5-1.5 mL/h. Preferred electrospinning conditions are: the receiving distance was 50cm, the spinning voltage was 60kV, and the extrusion rate was 1 mL/h.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the macromolecular organic chitosan is used for modifying the black talc, so that the adsorption capacity and the specific surface area of the black talc are enhanced, the electronegativity of the surface of the black talc is effectively enhanced, and more adsorption sites are provided. The adhesion of chitosan and the black talc layered nano material are used as a carrier, so that the silver nano particles are completely immobilized on the surface of the silver nano particles, the particle size distribution is uniform, and the phenomena of agglomeration and loss of antibacterial particles are avoided; the antibacterial non-woven fabric can keep good biocompatibility and antibacterial and bactericidal capacity for a long time by combining the electrostatic spinning process, and the service life of the antibacterial non-woven fabric is prolonged.
Drawings
Fig. 1 is a schematic view of the electrospinning process in example 1.
In the figure 1: a spinneret; 2: a high voltage power supply; 3: a grounded collector.
Detailed Description
The invention is further described below by means of specific examples, without the scope of protection of the invention being limited thereto.
The black talc nanomaterial used in the following examples (average particle size 220nm) was prepared as follows: adding 16mL of absolute ethyl alcohol into 10g of black talc (the black talc is from Guangfeng region in Shanghai province in Jiangxi), carrying out ball milling, carrying out wet grinding for 5h by using a ball mill 600r/min, washing with water, centrifuging, and drying at 60 ℃ to obtain 8.8g of black talc nanoparticles. And (3) vigorously stirring the black talc nano particles in 4L of deionized water at normal temperature for one week, fully stripping, centrifuging, and drying at 80 ℃ to obtain the black talc nano material (the average particle size is 220 nm).
The following performance tests were performed on the antibacterial nonwoven fabrics prepared in examples and comparative examples: testing the bacteriostasis rate of the non-woven fabric to escherichia coli and staphylococcus aureus; the test is carried out according to the GB/T20944 and 2007 textile antibacterial performance test standard.
Example 1
(1) Preparation of black talc/chitosan silver-carrying antibacterial additive material
0.5g of chitosan was dissolved in 100mL of water with stirring, and the concentration of the chitosan solution was 5 g/L. And then adding 0.15g of black talc nano material, controlling the pH value to be 4, reacting at 70 ℃ for 15h, uniformly dispersing, then adding 1.36g of silver nitrate, controlling the temperature of the system to be 75 ℃, reacting for 3h, cooling to room temperature, carrying out centrifugal separation, washing the obtained precipitate with deionized water, and drying at 60 ℃ to obtain the composite antibacterial addition material.
(2) Pulping and electrostatic spinning:
adding 8.34g of polyacrylonitrile as a polymer into 50mL of N, N-dimethylformamide as an organic solvent to prepare a spinning solution, wherein the concentration of the polymer is 15 wt%, adding 0.083g of black talc/chitosan/silver composite antibacterial material into the solvent, and the mass ratio of the polymer to the black talc/chitosan/silver composite antibacterial material is 100:1 to obtain spinning slurry; and (2) carrying out electrostatic spinning under the conditions that the ambient temperature is 25 ℃ and the ambient humidity is 35%, wherein the receiving distance in the electrostatic spinning process is 50cm, the spinning voltage is 60kV, the extrusion rate is 1mL/h, and the aluminum foil is adopted to receive spinning trickle, and the spinning trickle is solidified on the aluminum foil to obtain the antibacterial non-woven fabric.
The bacteriostasis rate of the non-woven fabric prepared in the embodiment 1 to escherichia coli is 99.5%, and the bacteriostasis rate to staphylococcus aureus is 98.7%, which shows that the non-woven fabric prepared in the invention has higher antibacterial performance; after 50 times of water washing, the bacteriostatic rate of the non-woven fabric to escherichia coli and staphylococcus aureus is more than 95%, which shows that the bacteriostatic property of the non-woven fabric has durability and water washing resistance.
Example 2
(1) Preparation of black talc/chitosan silver-carrying antibacterial additive material
0.5g of chitosan was dissolved in 100mL of water with stirring, and the concentration of the chitosan solution was 5 g/L. And then adding 0.15g of black talc nano material, controlling the pH value to be 4, reacting at 70 ℃ for 15h, uniformly dispersing, then adding 1.36g of silver nitrate, controlling the temperature of the system to be 75 ℃, reacting for 3h, cooling to room temperature, carrying out centrifugal separation, washing the obtained precipitate with deionized water, and drying at 60 ℃ to obtain the composite antibacterial addition material.
(2) Pulping and electrostatic spinning:
adding 11.81g of polyurethane serving as a polymer into 50mL of N, N-dimethylformamide serving as an organic solvent to prepare a spinning solution, wherein the concentration of the polymer is 20 wt%, adding 0.059g of black talc/chitosan/silver composite antibacterial material into the solvent, and the mass ratio of the polymer to the black talc/chitosan/silver composite antibacterial material is 200:1 to obtain spinning slurry: and (2) carrying out electrostatic spinning under the conditions that the ambient temperature is 25 ℃ and the ambient humidity is 35%, wherein the receiving distance in the electrostatic spinning process is 50cm, the spinning voltage is 50kV, the extrusion speed is 1mL/h, and the aluminum foil is adopted to receive spinning trickle, and the spinning trickle is solidified on the aluminum foil to obtain the antibacterial non-woven fabric.
The bacteriostasis rate of the non-woven fabric prepared in the embodiment 2 to escherichia coli is 99.7%, and the bacteriostasis rate to staphylococcus aureus is 98.2%, which shows that the non-woven fabric prepared in the invention has higher antibacterial performance; after 50 times of water washing, the bacteriostatic rate of the non-woven fabric to escherichia coli and staphylococcus aureus is more than 95%, which shows that the bacteriostatic property of the non-woven fabric has durability and water washing resistance.
Example 3
(1) Preparation of black talc/chitosan silver-carrying antibacterial additive material
0.5g of chitosan was dissolved in 100mL of water with stirring, and the concentration of the chitosan solution was 5 g/L. And then adding 0.15g of black talc nano material, controlling the pH value to be 4, reacting at 70 ℃ for 15h, uniformly dispersing, then adding 1.36g of silver nitrate, controlling the temperature of the system to be 75 ℃, reacting for 3h, cooling to room temperature, carrying out centrifugal separation, washing the obtained precipitate with deionized water, and drying at 60 ℃ to obtain the composite antibacterial addition material.
(2) Pulping and electrostatic spinning:
adding 10.37g of polyurethane serving as a polymer into 50mL of N, N-dimethylformamide serving as an organic solvent to prepare a spinning solution, wherein the concentration of the polymer is 18 wt%, adding 1.37g of black talc/chitosan/silver composite antibacterial material into the solvent, and the mass ratio of the polymer to the black talc/chitosan/silver composite antibacterial material is 100:1 to obtain spinning slurry; and (2) carrying out electrostatic spinning under the conditions that the ambient temperature is 25 ℃ and the ambient humidity is 35%, wherein the receiving distance in the electrostatic spinning process is 50cm, the spinning voltage is 50kV, the extrusion speed is 1mL/h, and the aluminum foil is adopted to receive spinning trickle, and the spinning trickle is solidified on the aluminum foil to obtain the antibacterial non-woven fabric.
The bacteriostasis rate of the non-woven fabric prepared in the embodiment 3 to escherichia coli is 99.3%, and the bacteriostasis rate to staphylococcus aureus is 98.5%, which shows that the non-woven fabric prepared by the invention has higher antibacterial performance; after 50 times of water washing, the bacteriostatic rate of the non-woven fabric to escherichia coli and staphylococcus aureus is more than 95%, which shows that the bacteriostatic property of the non-woven fabric has durability and water washing resistance.
Example 4
(1) Preparation of black talc/chitosan silver-carrying antibacterial additive material
0.5g of chitosan was dissolved in 100mL of water with stirring, and the concentration of the chitosan solution was 5 g/L. And then adding 0.15g of black talc nano material, controlling the pH value to be 4, reacting at 70 ℃ for 15h, uniformly dispersing, then adding 1.36g of silver nitrate, controlling the temperature of the system to be 75 ℃, reacting for 3h, cooling to room temperature, carrying out centrifugal separation, washing the obtained precipitate with deionized water, and drying at 60 ℃ to obtain the composite antibacterial addition material.
(2) Pulping and electrostatic spinning:
adding 11.81g of polyacrylonitrile serving as a polymer into 50mL of N, N-dimethylformamide serving as an organic solvent to prepare a spinning solution, wherein the concentration of the polymer is 20 wt%, adding 0.059g of black talc/chitosan/silver composite antibacterial material into the solvent, and the mass ratio of the polymer to the black talc/chitosan/silver composite antibacterial material is 200:1 to obtain spinning slurry; and (2) carrying out electrostatic spinning under the conditions that the ambient temperature is 25 ℃ and the ambient humidity is 35%, wherein the receiving distance in the electrostatic spinning process is 50cm, the spinning voltage is 60kV, the extrusion rate is 1mL/h, and the aluminum foil is adopted to receive spinning trickle, and the spinning trickle is solidified on the aluminum foil to obtain the antibacterial non-woven fabric.
The bacteriostasis rate of the non-woven fabric prepared in the embodiment 4 to escherichia coli is 99.4%, and the bacteriostasis rate to staphylococcus aureus is 98.0%, which shows that the non-woven fabric prepared by the invention has higher antibacterial performance; after 50 times of water washing, the bacteriostatic rate of the non-woven fabric to escherichia coli and staphylococcus aureus is more than 95%, which shows that the bacteriostatic property of the non-woven fabric has durability and water washing resistance.
Comparative example 1
(1) Preparation of chitosan/silver antibacterial additive material
Under the condition of stirring, 0.5g of chitosan is dissolved in 100mL of water, the concentration of the chitosan solution is 5g/L, the chitosan solution reacts for 15h at 70 ℃ and is uniformly dispersed, then 1.36g of silver nitrate is added, then the temperature of the system is controlled at 75 ℃ and reacts for 3h, the system is cooled to room temperature and then is centrifugally separated, washed by deionized water and dried at 60 ℃, and the composite antibacterial additive material is obtained.
(2) Pulping and electrostatic spinning:
adding 8.34g of polyacrylonitrile serving as a polymer into 50mLN, and taking N-dimethylformamide as an organic solvent to prepare a spinning solution, wherein the concentration of the polymer is 15 wt%, adding 0.083g of chitosan/silver composite antibacterial material into the solvent, and the mass ratio of the polymer to the chitosan/silver composite antibacterial material is 100:1 to obtain spinning slurry; and (2) carrying out electrostatic spinning under the conditions that the ambient temperature is 25 ℃ and the ambient humidity is 35%, wherein the receiving distance in the electrostatic spinning process is 50cm, the spinning voltage is 60kV, the extrusion rate is 1mL/h, and the aluminum foil is adopted to receive spinning trickle, and the spinning trickle is solidified on the aluminum foil to obtain the antibacterial non-woven fabric.
The bacteriostasis rate of the non-woven fabric prepared in the comparative example 1 to escherichia coli is 95.2%, and the bacteriostasis rate to staphylococcus aureus is 94.1%, which shows that the non-woven fabric prepared in the invention has poorer antibacterial performance compared with the non-woven fabric prepared in the example 1; after 50 times of water washing, the bacteriostatic rates of the non-woven fabric to escherichia coli and staphylococcus aureus are respectively reduced to 85.1% and 83.2%, and the reduction degree is greater than that of example 1, which shows that the bacteriostatic performance of the non-woven fabric has poorer durability and water washing resistance.
Comparative example 2
(1) Preparation of black talc/silver antibiotic additive material
Under the condition of stirring, adding 0.15g of black talc nano material into 100mL of water, controlling the concentration to be 1.5g/L, controlling the pH to be 4, reacting at 70 ℃ for 15h, uniformly dispersing, then adding 1.36g of silver nitrate, controlling the temperature of a system to be 75 ℃, reacting for 3h, cooling to room temperature, carrying out centrifugal separation, washing the obtained precipitate with deionized water, and drying at 60 ℃ to obtain the composite antibacterial addition material.
(2) Pulping and electrostatic spinning:
adding 8.34g of polyacrylonitrile as a polymer into 50mL of N, N-dimethylformamide as an organic solvent to prepare a spinning solution, wherein the concentration of the polymer is 15 wt%, adding 0.083g of black talc/silver composite antibacterial material into the solvent, and the mass ratio of the polymer to the black talc/silver composite antibacterial material is 100:1, obtaining spinning slurry; and (2) carrying out electrostatic spinning under the conditions that the ambient temperature is 25 ℃ and the ambient humidity is 35%, wherein the receiving distance in the electrostatic spinning process is 50cm, the spinning voltage is 60kV, the extrusion rate is 1mL/h, and the aluminum foil is adopted to receive spinning trickle, and the spinning trickle is solidified on the aluminum foil to obtain the antibacterial non-woven fabric.
The bacteriostasis rate of the non-woven fabric prepared in the comparative example 2 to escherichia coli is 95.8%, and the bacteriostasis rate to staphylococcus aureus is 93.1%, which shows that the non-woven fabric prepared in the invention has poorer antibacterial performance compared with the non-woven fabric prepared in the example 1; after 50 times of water washing, the bacteriostatic rates of the non-woven fabric to escherichia coli and staphylococcus aureus are respectively reduced to 81.0% and 80.2%, and the reduction degree is larger than that of the non-woven fabric in the comparative example 1, which shows that the bacteriostatic performance of the non-woven fabric is poorer in durability and water washing resistance.
Comparative example 3
Pulping and electrostatic spinning:
adding 8.34g of polyacrylonitrile serving as a polymer into 50mL of N, N-dimethylformamide serving as an organic solvent to prepare a spinning solution, wherein the concentration of the polymer is 15 wt%, adding silver nitrate into the solvent, and obtaining spinning slurry, wherein the mass ratio of the polymer to the silver nitrate is 100: 1; and (2) carrying out electrostatic spinning under the conditions that the ambient temperature is 25 ℃ and the ambient humidity is 35%, wherein the receiving distance in the electrostatic spinning process is 50cm, the spinning voltage is 60kV, the extrusion rate is 1mL/h, and the aluminum foil is adopted to receive spinning trickle, and the spinning trickle is solidified on the aluminum foil to obtain the antibacterial non-woven fabric.
The bacteriostasis rate of the non-woven fabric prepared in the comparative example 3 to escherichia coli is 90.2%, and the bacteriostasis rate to staphylococcus aureus is 89.0%, which shows that the non-woven fabric prepared in the invention has poorer antibacterial performance compared with the non-woven fabric prepared in the example 1; after 50 times of water washing, the bacteriostatic rates of the non-woven fabric to escherichia coli and staphylococcus aureus are respectively reduced to 75.2% and 72.1%, and the reduction degree is greater than that of example 1, which shows that the bacteriostatic performance of the non-woven fabric has poorer durability and water washing resistance.
Claims (10)
1. A nano antibacterial non-woven fabric filter material is characterized in that the nano antibacterial non-woven fabric filter material is prepared by the following method:
(1) preparation of black talc/chitosan silver-carrying antibacterial additive material
Under the stirring condition, dissolving chitosan in water, adding a black talc nano material, controlling the pH to be 3-5, stirring and reacting at 60-90 ℃ for 12-18 h, adding silver nitrate, reacting at 70-80 ℃ for 2-5 h, cooling the obtained reaction liquid to room temperature, centrifuging, washing and drying the obtained precipitate to obtain the black talc/chitosan silver-loaded antibacterial addition material; the mass ratio of the chitosan to the black talc nano material to the silver nitrate is 1:0.1-0.5: 1-3;
(2) pulping and electrostatic spinning:
adding the black talc/chitosan silver-loaded antibacterial additive material in the step (1) into an organic solvent solution of a polymer with the mass concentration of 5-20 wt% to obtain spinning slurry; carrying out electrostatic spinning under the conditions that the ambient temperature is 25-30 ℃ and the ambient humidity is 35-40%, wherein the aluminum foil receives spinning trickle, and the spinning trickle is solidified on the aluminum foil to obtain the nano antibacterial non-woven fabric filter material; in the organic solvent solution of the polymer, the polymer is one or a mixture of more of polyacrylonitrile, polyurethane and polystyrene, and the organic solvent is one or a mixture of more of N, N-dimethylformamide, N-dimethylacetamide, N-methylpyrrolidone and acetone; the mass ratio of the polymer contained in the organic solvent solution of the polymer to the black talc/chitosan silver-loaded antibacterial additive material is 50-200: 1.
2. the nano antibacterial non-woven fabric filter material as claimed in claim 1, wherein: the black talc nano material in the step (1) is obtained by the following method: adding absolute ethyl alcohol into black talc, performing wet ball milling for 5-10 h at 600r/min, washing, centrifuging, drying, adding the obtained black talc nanoparticles into deionized water at 20-30 ℃, stirring vigorously for one week, fully stripping, centrifuging, and drying to obtain the black talc nano material.
3. The nano antibacterial non-woven fabric filter material as claimed in claim 2, wherein: the volume of the absolute ethyl alcohol is 1-2 mL/g based on the mass of the black talc, and the volume of the deionized water is 0.2-1L/g based on the mass of the black talc nano particles.
4. The nano antibacterial non-woven fabric filter material as claimed in claim 1, wherein: the volume of the water in the step (1) is 100-500 mL/g based on the mass of the chitosan.
5. The nano antibacterial non-woven fabric filter material as claimed in claim 1, wherein: the mass ratio of the chitosan to the black talc nano material to the silver nitrate in the step (1) is 1:0.3: 2.72.
6. the nano antibacterial non-woven fabric filter material as claimed in claim 1, wherein: the concentration of the polymer in the organic solvent solution of the polymer in the step (2) is 15-20 wt%.
7. The nano antibacterial non-woven fabric filter material as claimed in claim 1, wherein: the mass ratio of the polymer contained in the organic solvent solution of the polymer in the step (2) to the black talc/chitosan silver-loaded antibacterial additive material is 100-200: 1.
8. The nano antibacterial non-woven fabric filter material as claimed in claim 1, wherein: in the organic solvent solution of the polymer in the step (2), the polymer is polyacrylonitrile or polyurethane.
9. The nano antibacterial non-woven fabric filter material as claimed in claim 1, wherein: in the organic solvent solution of the polymer in the step (2), the organic solvent is N, N-dimethylformamide.
10. The nano antibacterial non-woven fabric filter material as claimed in claim 1, wherein: the electrostatic spinning parameters in the step (2) are as follows: the receiving distance is 5-100 cm, the spinning voltage is 10-70 kV, and the extrusion rate is 0.5-1.5 mL/h.
Priority Applications (1)
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