CN111270420A - Preparation method of high-strength non-woven fabric - Google Patents
Preparation method of high-strength non-woven fabric Download PDFInfo
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- CN111270420A CN111270420A CN202010216790.2A CN202010216790A CN111270420A CN 111270420 A CN111270420 A CN 111270420A CN 202010216790 A CN202010216790 A CN 202010216790A CN 111270420 A CN111270420 A CN 111270420A
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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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0092—Electro-spinning characterised by the electro-spinning apparatus characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields
-
- 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
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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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
-
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/50—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyalcohols, polyacetals or polyketals
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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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/54—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of unsaturated nitriles
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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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
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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
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
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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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/03—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
- D04H3/033—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random reorientation immediately after yarn or filament formation
Abstract
The invention discloses a preparation method of a high-strength non-woven fabric, belonging to the technical field of non-woven fabric processing, and comprising the following steps: A. preparing a polymer solution; B. preparing a metal salt solution; C. preparing a mixed solution; D. and (5) preparing a finished non-woven fabric. The preparation method has simple integral process and convenient popularization and application, and the prepared non-woven fabric has strong antibacterial capacity, high strength and good stability.
Description
Technical Field
The invention belongs to the technical field of non-woven fabric processing, and particularly relates to a preparation method of a high-strength non-woven fabric.
Background
Nonwoven fabrics, also known as nonwovens, are composed of oriented or random fibers. It is called a cloth because of its appearance and certain properties. The non-woven fabric has the characteristics of moisture resistance, air permeability, flexibility, light weight, no combustion supporting, easy decomposition, no toxicity or irritation, rich color, low price, recycling and the like. For example, the polypropylene (pp material) granules are mostly adopted as raw materials and are produced by a continuous one-step method of high-temperature melting, spinning, laying a line and hot-pressing coiling.
The non-woven fabric has wide application, not only can be used as a clothing fabric, but also can be used for producing medical products such as masks, cotton yarns and the like. In order to improve the use performance and efficacy of the non-woven fabric, the preparation process of the non-woven fabric is improved, and the application number is as follows: 201310665558.7 discloses a high-strength non-woven fabric and its preparation method, wherein the antibacterial property of the non-woven fabric is improved by adding radix Ranunculi Ternati and herba Rubi Corchorifolii Immaturus, and the strength performance of the non-woven fabric is improved by matching the components of isotactic polypropylene and maleic anhydride grafted polypropylene; however, the stability of the antibacterial performance of the non-woven fabric is not strong, and the antibacterial ability can be weakened along with the increase of time; in addition, the strength quality is still to be improved.
Disclosure of Invention
The invention aims to provide a preparation method of a non-woven fabric with high strength aiming at the existing problems.
The invention is realized by the following technical scheme:
a preparation method of a high-strength non-woven fabric comprises the following steps:
A. mixing a polymer and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a polymer solution with the mass fraction of 12-15% for later use;
B. mixing metal salt and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a metal salt solution with the mass fraction of 30-35% for later use;
C. adding the metal salt solution obtained in the step B into the polymer solution obtained in the step A, simultaneously adding nano carbon powder and nano titanium dioxide, and magnetically stirring uniformly to obtain a mixed solution for later use;
D. and D, injecting the mixed solution obtained in the step C into a solution supply device, starting the device to carry out electrostatic spinning, and finally obtaining a finished non-woven fabric on a receiving aluminum foil of the device.
Further, the polymer in the step A is at least one of polyvinyl alcohol, polylactic acid, polyacrylonitrile, chitosan and polyvinylpyrrolidone.
Further, the solvent in the step A and the step B is at least one of ethanol, chloroform and deionized water.
Further, the metal salt in the step B is silver nitrate or copper chloride.
Further, the adding amount of the metal salt solution in the step C is 35-40% of the total mass of the polymer solution; the adding amount of the nano carbon powder is 2-4% of the total mass of the polymer solution; the addition amount of the nano titanium dioxide is 0.5-0.8% of the total mass of the polymer solution.
Furthermore, the solution supply device in step D is a device that adds an internal copper wire into the medical needle tube, and then applies a positive voltage to the internal copper wire in the medical needle tube to form an internal electric field, so that the metal ions in the mixed solution move to the outer layer under the induction of the electric field force, and the polymer molecules move to the inner layer, thereby forming a composite fiber.
And further, the voltage of spinning is controlled to be 13-18 kV during the electrostatic spinning treatment in the step D, the receiving distance between a spinning opening and a receiving aluminum foil is controlled to be 20-25 cm, and the flow rate is controlled to be 0.4-0.6 mL/h.
Preferably, the voltage of the spinning is controlled to be 15kV, the receiving distance between the spinning opening and the receiving aluminum foil is controlled to be 22cm, and the flow rate is controlled to be 0.5mL/h during the electrostatic spinning treatment in the step D.
In the preparation of the non-woven fabric, the preparation process is improved, and particularly, the nano carbon powder and the nano titanium dioxide are added in the preparation of the mixed solution, on one hand, the two components can be doped in polymer fibers, so that the strength, stability and other characteristics of the fibers are improved, on the other hand, metal particles separated out of the surfaces of the fibers can be adsorbed and fixed, the bonding strength of metal composite shell layers on the surfaces of the fibers on high-molecular fibers is enhanced, the surface wear resistance of the fibers is improved, due to the conductive effect of the nano carbon powder, the movement and separation of metal ions in the solution are promoted during electrostatic spinning treatment, the uniformity of the process is improved, the uniformity of the metal composite shell layers on the surfaces of the fibers is ensured, the quality of the fibers is improved, and the service performance of the non-woven fabric is.
Compared with the prior art, the invention has the following advantages:
the preparation method disclosed by the invention is simple in overall process and convenient to popularize and apply, and the prepared non-woven fabric has strong antibacterial capacity, high strength and good stability, the application range and the practical value of the non-woven fabric are improved, and the non-woven fabric has great market competitiveness.
Detailed Description
A preparation method of a high-strength non-woven fabric comprises the following steps:
A. mixing a polymer and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a polymer solution with the mass fraction of 12-15% for later use;
B. mixing metal salt and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a metal salt solution with the mass fraction of 30-35% for later use;
C. adding the metal salt solution obtained in the step B into the polymer solution obtained in the step A, simultaneously adding nano carbon powder and nano titanium dioxide, and magnetically stirring uniformly to obtain a mixed solution for later use;
D. and D, injecting the mixed solution obtained in the step C into a solution supply device, starting the device to carry out electrostatic spinning, and finally obtaining a finished non-woven fabric on a receiving aluminum foil of the device.
The polymer in the step A is at least one of polyvinyl alcohol, polylactic acid, polyacrylonitrile, chitosan and polyvinylpyrrolidone.
The solvent in the step A and the step B is at least one of ethanol, chloroform and deionized water.
The metal salt in the step B is silver nitrate or copper chloride.
The adding amount of the metal salt solution in the step C is 35-40% of the total mass of the polymer solution; the adding amount of the nano carbon powder is 2-4% of the total mass of the polymer solution; the addition amount of the nano titanium dioxide is 0.5-0.8% of the total mass of the polymer solution.
The solution supply device in the step D is a device for forming the composite fiber by adding built-in copper wires into the medical needle tube, then applying positive voltage to the built-in copper wires in the medical needle tube to form an internal electric field, so that metal ions in the mixed solution move to the outer layer under the induction action of the electric field force, and polymer molecules move to the inner layer.
And D, controlling the spinning voltage to be 13-18 kV during the electrostatic spinning treatment, controlling the receiving distance between the spinning opening and the receiving aluminum foil to be 20-25 cm, and controlling the flow rate to be 0.4-0.6 mL/h.
The polyvinyl alcohol used in the above is polyvinyl alcohol PVA-205, a product of kokumari; the polylactic acid is NatureWorks-polylactic acid 2002D; the polyacrylonitrile is produced by Kunshan Cheng An Biotechnology Limited company of Jiangsu; the chitosan is industrial grade chitosan produced by Qingdao Bozhihui Biotech limited; the polyvinylpyrrolidone is produced by Ronghe New Material science and technology Limited; the nano carbon powder is made by Qinghe county Xin Hu metal material limited company with the mark number of xh-14; the nano titanium dioxide is rutile type nano titanium dioxide produced by Jinnanbao gold chemical industry limited company.
The invention is further illustrated by the following examples.
Example 1
A preparation method of a high-strength non-woven fabric comprises the following steps:
A. mixing a polymer and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a polymer solution with the mass fraction of 12% for later use;
B. mixing metal salt and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture evenly to prepare a metal salt solution with the mass fraction of 30% for later use;
C. adding the metal salt solution obtained in the step B into the polymer solution obtained in the step A, simultaneously adding nano carbon powder and nano titanium dioxide, and magnetically stirring uniformly to obtain a mixed solution for later use;
D. and D, injecting the mixed solution obtained in the step C into a solution supply device, starting the device to carry out electrostatic spinning, and finally obtaining a finished non-woven fabric on a receiving aluminum foil of the device.
The polymer in the step A is polyvinyl alcohol.
The solvent in the step A and the step B is ethanol.
The metal salt in the step B is silver nitrate.
The adding amount of the metal salt solution in the step C is 35 percent of the total mass of the polymer solution; the adding amount of the nano carbon powder is 2 percent of the total mass of the polymer solution; the adding amount of the nano titanium dioxide is 0.5 percent of the total mass of the polymer solution.
The solution supply device in the step D is a device for forming the composite fiber by adding built-in copper wires into the medical needle tube, then applying positive voltage to the built-in copper wires in the medical needle tube to form an internal electric field, so that metal ions in the mixed solution move to the outer layer under the induction action of the electric field force, and polymer molecules move to the inner layer.
And D, controlling the spinning voltage to be 13kV during the electrostatic spinning treatment, controlling the receiving distance between the spinning port and the receiving aluminum foil to be 20cm, and controlling the flow rate to be 0.4 mL/h.
Example 2
A preparation method of a high-strength non-woven fabric comprises the following steps:
A. mixing a polymer and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a polymer solution with the mass fraction of 12% for later use;
B. mixing metal salt and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture evenly to prepare a metal salt solution with the mass fraction of 35% for later use;
C. adding the metal salt solution obtained in the step B into the polymer solution obtained in the step A, simultaneously adding nano carbon powder and nano titanium dioxide, and magnetically stirring uniformly to obtain a mixed solution for later use;
D. and D, injecting the mixed solution obtained in the step C into a solution supply device, starting the device to carry out electrostatic spinning, and finally obtaining a finished non-woven fabric on a receiving aluminum foil of the device.
The polymer in the step A is polylactic acid and polyacrylonitrile, and the mass using amount ratio of the polylactic acid to the polyacrylonitrile is 1: 1.
The solvent in the step A and the step B is ethanol.
The metal salt in the step B is silver nitrate.
The adding amount of the metal salt solution in the step C is 35 percent of the total mass of the polymer solution; the adding amount of the nano carbon powder is 4 percent of the total mass of the polymer solution; the adding amount of the nano titanium dioxide is 0.5 percent of the total mass of the polymer solution.
The solution supply device in the step D is a device for forming the composite fiber by adding built-in copper wires into the medical needle tube, then applying positive voltage to the built-in copper wires in the medical needle tube to form an internal electric field, so that metal ions in the mixed solution move to the outer layer under the induction action of the electric field force, and polymer molecules move to the inner layer.
And D, controlling the spinning voltage to be 13kV during the electrostatic spinning treatment, controlling the receiving distance between the spinning port and the receiving aluminum foil to be 25cm, and controlling the flow rate to be 0.6 mL/h.
Comparative example 1
A preparation method of a high-strength non-woven fabric comprises the following steps:
A. mixing a polymer and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a polymer solution with the mass fraction of 12% for later use;
B. mixing metal salt and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture evenly to prepare a metal salt solution with the mass fraction of 30% for later use;
C. adding the metal salt solution obtained in the step B into the polymer solution obtained in the step A, simultaneously adding nano carbon powder, and obtaining a mixed solution for later use after uniformly stirring by magnetic force;
D. and D, injecting the mixed solution obtained in the step C into a solution supply device, starting the device to carry out electrostatic spinning, and finally obtaining a finished non-woven fabric on a receiving aluminum foil of the device.
This comparative example 1 is different from example 1 in that the use of nano-titania component is omitted, except that the steps of the method are the same.
Comparative example 2
A preparation method of a high-strength non-woven fabric comprises the following steps:
A. mixing a polymer and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a polymer solution with the mass fraction of 12% for later use;
B. mixing metal salt and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture evenly to prepare a metal salt solution with the mass fraction of 35% for later use;
C. adding the metal salt solution obtained in the step B into the polymer solution obtained in the step A, simultaneously adding nano titanium dioxide, and uniformly stirring by magnetic force to obtain a mixed solution for later use;
D. and D, injecting the mixed solution obtained in the step C into a solution supply device, starting the device to carry out electrostatic spinning, and finally obtaining a finished non-woven fabric on a receiving aluminum foil of the device.
The comparative example 2 is different from the example 2 in that the addition of the nano carbon powder component is omitted, except that the steps of the method are the same.
In order to compare the effects of the present invention, the nonwoven fabrics prepared in the above examples 1 and 2, comparative examples 1 and 2 were subjected to performance tests, and the specific comparative data are shown in the following table 1:
TABLE 1
As can be seen from the above table 1, the reasonably added nano carbon powder and nano titanium dioxide components in the method have good synergistic compatibility, and the strength and quality of the non-woven fabric can be obviously improved.
Example 3
A preparation method of a high-strength non-woven fabric comprises the following steps:
A. mixing a polymer and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a polymer solution with the mass fraction of 14% for later use;
B. mixing metal salt and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture evenly to prepare a metal salt solution with the mass fraction of 33% for later use;
C. adding the metal salt solution obtained in the step B into the polymer solution obtained in the step A, simultaneously adding nano carbon powder and nano titanium dioxide, and magnetically stirring uniformly to obtain a mixed solution for later use;
D. and D, injecting the mixed solution obtained in the step C into a solution supply device, starting the device to carry out electrostatic spinning, and finally obtaining a finished non-woven fabric on a receiving aluminum foil of the device.
The polymer in the step A is polyacrylonitrile and chitosan, and the mass ratio of the polyacrylonitrile to the chitosan is 2: 1.
The solvent in the step A and the step B is chloroform.
The metal salt in the step B is silver nitrate.
The adding amount of the metal salt solution in the step C is 38 percent of the total mass of the polymer solution; the adding amount of the nano carbon powder is 3 percent of the total mass of the polymer solution; the adding amount of the nano titanium dioxide is 0.7 percent of the total mass of the polymer solution.
The solution supply device in the step D is a device for forming the composite fiber by adding built-in copper wires into the medical needle tube, then applying positive voltage to the built-in copper wires in the medical needle tube to form an internal electric field, so that metal ions in the mixed solution move to the outer layer under the induction action of the electric field force, and polymer molecules move to the inner layer.
And D, controlling the spinning voltage to be 15kV during the electrostatic spinning treatment, controlling the receiving distance between the spinning port and the receiving aluminum foil to be 22cm, and controlling the flow rate to be 0.5 mL/h.
Example 4
A preparation method of a high-strength non-woven fabric comprises the following steps:
A. mixing a polymer and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a polymer solution with the mass fraction of 15% for later use;
B. mixing metal salt and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture evenly to prepare a metal salt solution with the mass fraction of 35% for later use;
C. adding the metal salt solution obtained in the step B into the polymer solution obtained in the step A, simultaneously adding nano carbon powder and nano titanium dioxide, and magnetically stirring uniformly to obtain a mixed solution for later use;
D. and D, injecting the mixed solution obtained in the step C into a solution supply device, starting the device to carry out electrostatic spinning, and finally obtaining a finished non-woven fabric on a receiving aluminum foil of the device.
The polymer in the step A is polyvinylpyrrolidone.
The solvent in the step A and the step B is chloroform and deionized water, and the volume usage ratio of the chloroform to the deionized water is 1: 3.
The metal salt in the step B is copper chloride.
The adding amount of the metal salt solution in the step C is 40 percent of the total mass of the polymer solution; the adding amount of the nano carbon powder is 4 percent of the total mass of the polymer solution; the adding amount of the nano titanium dioxide is 0.8 percent of the total mass of the polymer solution.
The solution supply device in the step D is a device for forming the composite fiber by adding built-in copper wires into the medical needle tube, then applying positive voltage to the built-in copper wires in the medical needle tube to form an internal electric field, so that metal ions in the mixed solution move to the outer layer under the induction action of the electric field force, and polymer molecules move to the inner layer.
And D, controlling the spinning voltage to be 18kV during the electrostatic spinning treatment, controlling the receiving distance between the spinning port and the receiving aluminum foil to be 25cm, and controlling the flow rate to be 0.6 mL/h.
Comparative example 3
A preparation method of a high-strength non-woven fabric comprises the following steps:
A. mixing a polymer and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a polymer solution with the mass fraction of 14% for later use;
B. mixing metal salt and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture evenly to prepare a metal salt solution with the mass fraction of 33% for later use;
C. adding the metal salt solution obtained in the step B into the polymer solution obtained in the step A, and uniformly stirring by magnetic force to obtain a mixed solution for later use;
D. and D, injecting the mixed solution obtained in the step C into a solution supply device, starting the device to carry out electrostatic spinning, and finally obtaining a finished non-woven fabric on a receiving aluminum foil of the device.
The polymer in the step A is polyacrylonitrile and chitosan, and the mass ratio of the polyacrylonitrile to the chitosan is 2: 1.
The solvent in the step A and the step B is chloroform.
The metal salt in the step B is silver nitrate.
The amount of the metal salt solution added in step C was 38% of the total mass of the polymer solution.
The solution supply device in the step D is a device for forming the composite fiber by adding built-in copper wires into the medical needle tube, then applying positive voltage to the built-in copper wires in the medical needle tube to form an internal electric field, so that metal ions in the mixed solution move to the outer layer under the induction action of the electric field force, and polymer molecules move to the inner layer.
And D, controlling the spinning voltage to be 15kV during the electrostatic spinning treatment, controlling the receiving distance between the spinning port and the receiving aluminum foil to be 22cm, and controlling the flow rate to be 0.5 mL/h.
The difference between this comparative example 3 and example 3 is that the addition of the nano titanium dioxide and nano carbon powder components is omitted, except that the other steps are the same.
Comparative example 4
The application numbers are: 201310665558.7 discloses a high-strength non-woven fabric and a preparation method thereof,
in order to compare the effects of the present invention, the nonwoven fabrics prepared in the above examples 3 and 4, comparative examples 3 and 4 were subjected to performance tests, and the specific comparative data are shown in the following table 2:
TABLE 2
Note: the antimicrobial test described in Table 2 above was carried out by sending the nonwoven fabric sample to general Standard technology service, Shanghai, Inc. (SGS Shanghai division, address: Shanghai Yishan No. 889, floor No. 3, floor No. 1) for testing.
As can be seen from table 2 above, the nonwoven fabric obtained by the method of the present invention has good strength characteristics and excellent antibacterial performance, and in practical use, it is found that the nonwoven fabric of the present invention can maintain high antibacterial activity even after being stored for a long time, while the nonwoven fabric of comparative example 4 has significantly reduced antibacterial performance with time.
Claims (8)
1. A preparation method of a high-strength non-woven fabric is characterized by comprising the following steps:
A. mixing a polymer and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a polymer solution with the mass fraction of 12-15% for later use;
B. mixing metal salt and a solvent together, putting the mixture into a stirring tank, and then continuously stirring the mixture uniformly to prepare a metal salt solution with the mass fraction of 30-35% for later use;
C. adding the metal salt solution obtained in the step B into the polymer solution obtained in the step A, simultaneously adding nano carbon powder and nano titanium dioxide, and magnetically stirring uniformly to obtain a mixed solution for later use;
D. and D, injecting the mixed solution obtained in the step C into a solution supply device, starting the device to carry out electrostatic spinning, and finally obtaining a finished non-woven fabric on a receiving aluminum foil of the device.
2. The method of claim 1, wherein the polymer in step a is at least one of polyvinyl alcohol, polylactic acid, polyacrylonitrile, chitosan, and polyvinylpyrrolidone.
3. The method of claim 1, wherein the solvent used in step A and step B is at least one of ethanol, chloroform, and deionized water.
4. The method of claim 1, wherein the metal salt in step B is silver nitrate or copper chloride.
5. The method for preparing the non-woven fabric with high strength according to claim 1, wherein the addition amount of the metal salt solution in the step C is 35-40% of the total mass of the polymer solution; the adding amount of the nano carbon powder is 2-4% of the total mass of the polymer solution; the addition amount of the nano titanium dioxide is 0.5-0.8% of the total mass of the polymer solution.
6. The method of claim 1, wherein the solution supplying means in step D is a means for forming a composite fiber by adding a built-in copper wire into a medical needle tube, and then applying a positive voltage to the built-in copper wire inside the medical needle tube to form an internal electric field, so that metal ions in the mixed solution move to the outer layer and polymer molecules move to the inner layer under the induction of the electric field force.
7. The method of claim 1, wherein the voltage of the spinning is controlled to be 13-18 kV during the electrostatic spinning treatment, the receiving distance between the spinning opening and the receiving aluminum foil is controlled to be 20-25 cm, and the flow rate is controlled to be 0.4-0.6 mL/h.
8. The method of claim 7, wherein the voltage of the spinning is controlled to be 15kV, the receiving distance between the spinning opening and the aluminum foil is controlled to be 22cm, and the flow rate is controlled to be 0.5mL/h during the electrospinning process in the step D.
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