CN113005642B - Preparation method of nano spider web fiber membrane - Google Patents
Preparation method of nano spider web fiber membrane Download PDFInfo
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- CN113005642B CN113005642B CN202110226067.7A CN202110226067A CN113005642B CN 113005642 B CN113005642 B CN 113005642B CN 202110226067 A CN202110226067 A CN 202110226067A CN 113005642 B CN113005642 B CN 113005642B
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- 239000000835 fiber Substances 0.000 title claims abstract description 43
- 239000012528 membrane Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 241000239290 Araneae Species 0.000 title claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 39
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims abstract description 32
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims abstract description 32
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims abstract description 32
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000009987 spinning Methods 0.000 claims abstract description 24
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 15
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 6
- 239000010936 titanium Substances 0.000 claims abstract description 6
- 230000007062 hydrolysis Effects 0.000 claims abstract description 3
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 12
- 235000019441 ethanol Nutrition 0.000 claims description 11
- 239000004745 nonwoven fabric Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 241000221931 Hypomyces rosellus Species 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 3
- 239000008139 complexing agent Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 12
- 239000011148 porous material Substances 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 abstract 1
- 229920000620 organic polymer Polymers 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000002121 nanofiber Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005686 electrostatic field Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 229920006254 polymer film Polymers 0.000 description 2
- 108010081750 Reticulin Proteins 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 238000001523 electrospinning Methods 0.000 description 1
- 238000007590 electrostatic spraying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000004750 melt-blown nonwoven Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
-
- 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
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Nonwoven Fabrics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses a preparation method of a nano spider-web fiber membrane, in particular to a preparation method of a titanium dioxide/polyvinylpyrrolidone nano spider-web fiber membrane. Dissolving template agent polyvinylpyrrolidone in absolute ethyl alcohol to obtain an organic polymer template, then adding isopropyl titanate as a titanium source, and adding acetic acid as an isopropyl titanate hydrolysis inhibitor in the process to obtain a spinning raw material solution; and adding the spinning solution into an electrostatic spinning device for electrostatic spinning to prepare the titanium dioxide/polyvinylpyrrolidone nano-cobweb fiber membrane. The preparation method has simple process, and the prepared titanium dioxide/polyvinylpyrrolidone fiber membrane has a nano-cobweb structure, and compared with the common electrostatic spinning fiber membrane, the fiber diameter is smaller, the pore diameter of the fiber membrane is smaller, and the porosity is higher. Has good application prospect in the fields of air filtration and pollutant catalytic degradation.
Description
Technical Field
The invention relates to a preparation method of a nano spider-web fiber membrane, in particular to a preparation process of a titanium dioxide/polyvinylpyrrolidone nano spider-web fiber membrane, belonging to the technical field of nano materials.
Background
With the rapid development of industrialization and urbanization in China, the problem of air pollution is still an important problem which seriously influences the pursuit of happy and nice life of people, and irreversible damage is caused to the physical health of people. Therefore, how to effectively treat the particle pollution in the atmosphere is a great problem about the livelihood. The traditional filtering material is manufactured based on glass fiber or melt-blown non-woven fabric, has a good filtering effect on particles with the size above the micron level, but has poor filtering efficiency on submicron and even nano-level particles, and has the problems of large filtering resistance, small dust holding capacity, short service life and the like, so that the development of a novel high-efficiency low-resistance air filtering material is particularly necessary.
The nanofiber prepared by the electrostatic spinning technology has the characteristics of large specific surface area, high porosity, good internal pore connectivity and the like, has a filtering effect on particles of 1-2 mu m, can filter solid particles below 1 mu m even by using an efficient air filtering membrane, and is an ideal material for preparing a high-performance filtering membrane. However, most of the fibers prepared by conventional electrostatic spinning are distributed in hundreds of nanometers in diameter, are not true nano materials, still have the problems of low filtration efficiency, large resistance pressure drop and the like, and are difficult to meet the requirement of fine filtration. The nano-scale cobweb is a novel fiber structure obtained by electrostatic spraying technology, the two-dimensional reticular fiber membrane material similar to a spider web shape is formed by taking electrostatic spinning fibers as a support, the average diameter of the fibers in the web can reach below 50nm and is one order of magnitude lower than that of common electrostatic spinning fibers, most meshes exist in a stable hexagonal structure, the material is endowed with larger specific surface area, outstanding adsorption performance and the like, and the nano-scale cobweb has great application potential in the field of air filtration.
Disclosure of Invention
In view of this, the invention provides a preparation method of an organic-inorganic composite nano-spider web structure fiber membrane, which can be expected to expand the application field of nano-spider web fiber structures.
In order to achieve the aim, the invention provides a preparation method of a titanium dioxide/polyvinylpyrrolidone nano spider web fibrous membrane, which comprises the following specific steps:
s1, mixing high molecular weight (M) W = 1300000) is dissolved in absolute ethyl alcohol, and a colorless transparent solution A is obtained after uniform stirring; in this step, ethanol is used as a solvent, and polyvinylpyrrolidone is used as a template agent to increase the viscosity of the spinning solution, which is beneficial for forming continuous fibers, and is a necessary condition for preparing nanofibers by an electrostatic spinning technology.
S2, adding a certain amount of isopropyl titanate serving as a titanium source into the solution A, simultaneously adding a proper amount of acetic acid serving as a complexing agent to inhibit the quick hydrolysis of the isopropyl titanate, and uniformly stirring to obtain a light yellow transparent spinning solution. In this step, it is generally considered that the addition of acetic acid first gives better results.
And S3, filling the spinning solution into a 5ml syringe, taking the non-woven fabric as a receiving base material, adjusting a proper injection speed, a proper working voltage, a proper receiving distance and the like to spin, and after receiving for a certain time, obtaining a fiber membrane with a certain thickness on the non-woven fabric base material.
And S4, drying the obtained fiber membrane in an oven at 60 ℃ for 12 hours to remove the non-volatile solvent so as to obtain the titanium dioxide/polyvinylpyrrolidone nano spider web fiber membrane.
Preferably, in the S1, the mass ratio of the polyvinylpyrrolidone to the ethanol solvent is 1.
Preferably, in the S2, the mass ratio of the isopropyl titanate to the polyvinylpyrrolidone is 2.7-2.9. The volume ratio of the ethanol to the acetic acid is 10-15, and the stirring time is more than 6 h.
Preferably, in S3, the process parameters of the electrospinning process are as follows: the injection speed is 0.5-1.5 mL/h, the receiving distance is 17-25 cm, the receiving speed is 60-100 r/min, and the translation speed is 100mm/min. The environmental conditions are controlled at 28 + -2 deg.C and 50 + -3% humidity.
Has the advantages that: reports that the titanium dioxide/polyvinylpyrrolidone nano spider web fiber membrane prepared by the invention adopts isopropyl titanate and polyvinylpyrrolidone as two substances to prepare nano spider web structures are rare. The key point of the invention is to adjust proper environmental parameters and spinning technological parameters to obtain an unstable Taylor cone, so that fibers and charged small droplets are generated in the spinning process at the same time, the small droplets can be deformed to form a polymer film under the combined action of electrostatic field repulsion, solution surface tension, gravity, air resistance and the like in the rapid movement process of an electrostatic field, the polymer film is accompanied with the rapid volatilization of a solvent in the continuous expansion process, so that the droplet film is subjected to phase separation, finally, a solvent-enriched phase forms meshes, and the polymer-enriched phase is solidified into the nanofibers with a two-dimensional cobweb structure. The diameter of the fiber in the net is 10-50 nm, and the average pore diameter is 50-250 nm.
In the process of the electrostatic spinning method, the proper temperature and humidity are controlled, so that the Taylor cone formed by the spinning solution is unstable, part of the spinning solution is stretched in an electric field to obtain fibers, the other part of the spinning solution cannot be stretched to completely form small liquid drops, and the small liquid drops are further stressed in the motion process to form a topological net structure, so that the prepared titanium dioxide/polyvinylpyrrolidone fibers have a nano spider-web structure, and compared with common electrostatic spinning fibers, the titanium dioxide/polyvinylpyrrolidone fibers have smaller fiber diameters, larger specific surface areas, smaller fiber membrane apertures and higher porosity.
Drawings
FIG. 1 is an electron micrograph of a titanium dioxide/polyvinylpyrrolidone nano-spider web fiber membrane prepared in example 3;
FIG. 2 (a, b, c, d) is the scanning electron microscope image of the formation process of the titanium dioxide/polyvinylpyrrolidone nano-spider web prepared in example 3.
Detailed Description
The invention is further illustrated by the following examples.
Example 1
S1, dissolving polyvinylpyrrolidone in absolute ethyl alcohol (the mass ratio of polyvinylpyrrolidone to ethanol solvent is 1.
S2, adding acetic acid (the volume ratio of the ethanol to the acetic acid is 10) into the solution A, then slowly adding isopropyl titanate (the mass ratio of the isopropyl titanate to the polyvinylpyrrolidone is 2.7) as a titanium source, and uniformly stirring at the rotating speed of 300r/min (6 h) to obtain a light yellow transparent spinning solution.
And S3, respectively filling two parts of about 2ml spinning solution into two 5ml injectors under the conditions that the humidity is 47-53% and the temperature is 28 +/-2 ℃, adopting double-needle spinning, taking non-woven fabric as a receiving base material, setting the injection speed to be 0.5ml/h, adjusting the working voltage to be 11kv, setting the receiving distance to be 17cm, setting the receiving speed to be 60r/min and setting the translation speed to be 100mm/min. The spinning time was 1.5h, and a fiber film having a thickness of 40. + -. 20 μm was obtained on the nonwoven fabric substrate.
And S4, drying the obtained fiber membrane in an oven at 60 ℃ for 12 hours to remove the non-volatile solvent so as to obtain the titanium dioxide/polyvinylpyrrolidone nano fiber membrane.
Example 2
S1, dissolving polyvinylpyrrolidone in absolute ethyl alcohol (the mass ratio of the polyvinylpyrrolidone to the ethanol solvent is 1.
S2, adding acetic acid (the volume ratio of the ethanol to the acetic acid is 15) into the solution A, then slowly adding isopropyl titanate (the mass ratio of the isopropyl titanate to the polyvinylpyrrolidone is 2.9) as a titanium source, and uniformly stirring at the rotating speed of 300r/min (8 h) to obtain a light yellow transparent spinning solution.
And S3, respectively filling two parts of about 2ml spinning solution into two 5ml syringes under the conditions that the humidity is 47-53% and the temperature is 28 +/-2 ℃, adopting double-needle spinning, taking non-woven fabric as a receiving base material, setting the injection speed to be 1.5ml/h, adjusting the working voltage to be 12kv, setting the receiving distance to be 25cm, setting the receiving speed to be 80r/min and setting the translation speed to be 100mm/min. The spinning time was 1.5h, and a fiber film having a thickness of 40. + -. 20 μm was obtained on the nonwoven fabric substrate.
And S4, drying the obtained fiber membrane in an oven at 60 ℃ for 12 hours to remove the non-volatile solvent so as to obtain the titanium dioxide/polyvinylpyrrolidone nano fiber membrane.
Example 3
S1, dissolving polyvinylpyrrolidone in absolute ethyl alcohol (the mass ratio of polyvinylpyrrolidone to ethanol solvent is 1.
S2, adding acetic acid (the volume ratio of the ethanol to the acetic acid is 10) into the solution A, then slowly adding isopropyl titanate (the mass ratio of the isopropyl titanate to the polyvinylpyrrolidone is 2.8) as a titanium source, and uniformly stirring at the rotating speed of 300r/min (6 h) to obtain a light yellow transparent spinning solution.
And S3, respectively filling two parts of about 2ml spinning solution into two 5ml injectors under the conditions that the humidity is 47-53% and the temperature is 28 +/-2 ℃, adopting double-needle spinning, taking non-woven fabric as a receiving base material, setting the injection speed to be 1ml/h, adjusting the working voltage to be 20kv, setting the receiving distance to be 20cm, setting the receiving speed to be 100r/min and setting the translation speed to be 100mm/min. The spinning time was 1.5h, and a fiber film having a thickness of 40. + -. 20 μm, in which the diameter of the fibers of the network structure was about 40nm, was obtained on the nonwoven fabric substrate.
And S4, drying the obtained fiber membrane in an oven at 60 ℃ for 12 hours to remove the non-volatile solvent so as to obtain the titanium dioxide/polyvinylpyrrolidone nano fiber membrane.
Fig. 1 shows that the spider-web structures obtained under such conditions are regularly arranged and relatively uniformly distributed, and fig. 2 is an electron microscope image of the process that small droplets formed by unstable taylor cones are stretched into liquid films under the action of electric field force, gravity, surface tension and the like to gradually form the spider-web structures.
Claims (1)
1. A preparation method of a nanometer cobweb fiber membrane is characterized by comprising the following specific steps:
s1, dissolving polyvinylpyrrolidone with a molecular weight of 1300000 in absolute ethyl alcohol, and uniformly stirring to obtain a colorless transparent solution A; the mass ratio of the polyvinylpyrrolidone to the ethanol solvent is 1;
s2, firstly adding a proper amount of acetic acid serving as a complexing agent into the solution A to inhibit rapid hydrolysis, then adding a certain amount of isopropyl titanate serving as a titanium source, and uniformly stirring to obtain a light yellow transparent spinning solution; the mass ratio of the isopropyl titanate to the polyvinylpyrrolidone is 2.7-2.9; the volume ratio of the ethanol to the acetic acid is 10 to 15, and the stirring time is more than 6 hours;
s3, filling the spinning solution into a 5ml syringe, taking the non-woven fabric as a receiving base material, adjusting a proper injection speed, a proper working voltage and a proper receiving distance to perform electrostatic spinning, and after receiving for a certain time, obtaining a fiber membrane with a certain thickness on the non-woven fabric base material; the technological parameters of the electrostatic spinning process are as follows: the push injection speed is 0.5 to 1.5mL/h, the receiving distance is 17 to 25cm, the receiving speed is 60 to 100r/min, and the translation speed is 100mm/min; the environmental conditions are controlled at 28 +/-2 ℃ and 50 +/-3% of humidity;
and S4, drying the obtained fiber membrane in an oven at 60 ℃ for 12 hours to obtain the titanium dioxide/polyvinylpyrrolidone nano spider web fiber membrane.
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| CN116672901B (en) * | 2023-08-04 | 2023-10-27 | 西安金沃泰环保科技有限公司 | Nanofiltration material for acid-containing waste gas and preparation method thereof |
| CN117468172B (en) * | 2023-10-31 | 2024-08-20 | 波司登羽绒服装有限公司 | Waterproof high-moisture-permeability breathable electrostatic spinning film and preparation method and application thereof |
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| CN106984201B (en) * | 2017-05-08 | 2019-06-04 | 河北科技大学 | Nanometer spider web/beading fiber composite air-filtering membrane and preparation method thereof |
| CN107557893B (en) * | 2017-08-01 | 2019-04-09 | 东华大学 | A kind of two-dimension netted superfine nano-fiber material of electrostatic direct-injection and preparation method thereof |
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