CN114908561A - Copper nanowire composite gauze, preparation method thereof and anti-haze screen window - Google Patents
Copper nanowire composite gauze, preparation method thereof and anti-haze screen window Download PDFInfo
- Publication number
- CN114908561A CN114908561A CN202210480046.2A CN202210480046A CN114908561A CN 114908561 A CN114908561 A CN 114908561A CN 202210480046 A CN202210480046 A CN 202210480046A CN 114908561 A CN114908561 A CN 114908561A
- Authority
- CN
- China
- Prior art keywords
- copper
- gauze
- copper nanowire
- preparation
- nanowires
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/52—Devices affording protection against insects, e.g. fly screens; Mesh windows for other purposes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/34—Polyamides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Abstract
The invention provides a preparation method of a copper nanowire composite gauze, which comprises the following steps: s1) dispersing the copper nanowires in an alcohol solvent to obtain copper nanowire dispersion liquid; s2) heating the gauze substrate, and spraying copper nanowire dispersion liquid on the surface to obtain the gauze substrate compounded with the conductive copper nanowires; s3) dipping the gauze substrate compounded with the conductive copper nanowires in a solution containing a reducing agent to obtain the copper nanowire compound gauze. Compared with the prior art, the copper nanowire composite gauze with high conductivity is obtained by uniformly loading the copper nanowires on the gauze substrate through spraying and then welding the copper nanowires into a conductive network through chemical welding by using a reducing agent, and PM can be adsorbed by coulomb force 2.5 The balance of the filtration performance and the air permeability is realized, andthe air purification can be realized in the state of air circulation, and meanwhile, the preparation method is simple, low in pollution, economical, low in cost and wide in application prospect.
Description
Technical Field
The invention belongs to the technical field of nano materials, and particularly relates to a copper nanowire composite gauze, a preparation method thereof and an anti-haze screen window.
Background
With the improvement of the development level of China, the haze problem in the air increasingly attracts people's attention, and becomes one of important factors influencing human health. The haze is mainly composed of three items of sulfur dioxide, nitrogen oxides and inhalable particles. The inhalable particles are particles with aerodynamic equivalent diameter less than or equal to 10 μm, also called PM 10 It lasts long in ambient air and has a great impact on human health and atmospheric visibility. And fine particulate matter PM of 2.5 μm or less in diameter 2.5 Compared with PM 10 The particle size is smaller, and toxic and harmful substances (such as heavy metals, microorganisms and the like) are easily attached, so that the influence on the human health and the quality of the atmospheric environment is larger. Studies have shown that long-term inhalation of high concentrations of haze particles in air by humans can cause many health problems, such as PM in haze 2.5 Can pass through the protective barrier of the respiratory tract, reach the bronchus and the alveolus, and then be transmitted through the lung to interfere other organs, thereby causing various diseases such as blood vessels, lung inflammation and the like. Therefore, in addition to the problem of controlling the pollution of the haze particles from the root, the indoor air quality problem also needs to be concerned.
Currently, commercial PM 2.5 Haze granule clarification plant is air purifier mainly, and its effective filter layer is mostly HEPA filter screen, active carbon layer etc.. Wherein the HEPA filter screen intercepts PM through thick physical barrier 2.5 But it requires the pressure drop to be balanced with the help of a powerful air pump to assist air circulation, increasing energy consumption and creating noise problems. The active carbon has good adsorption effect, but pollutants adsorbed by the active carbon are easily released back to the air under the high-temperature and high-humidity environment, so that secondary pollution is caused.
The high-end air purifiers in the market adopt more various filtering technologies, such as an anion technology, to solve the problems, but the high-end air purifiers are relatively high in selling price and not suitable for popularization and use. In addition, air purifier need be in inclosed indoor air-purifying, and purification capacity is relatively poor and energy consumption is higher under the state of circulation of air.
In view of this, in recent yearsSeries of PM with filtering function 2.5 The filter membrane of ability, as antifog haze screen window material, realize air-purifying under the state of circulation of air to reduce the energy consumption.
The American chemical society, journal of Nano materials (ACS Nano: high y efficiency, Transparent, and Multifunctional Air Filters Using Self-Assembled 2D Nanoarchitectured fibers Networks,2019, volume 13, page 13501 and 13512), introduces a method of electrospinning to prepare a filter membrane with a spider web-like unique nanofiber framework. Due to the size effect of the 2D nano grid structure, the filter membrane has the advantages of high transparency, low thickness, light weight, high filtering efficiency, low pressure drop and the like, but the energy consumption of the whole preparation process is larger.
Germany Advanced Functional Materials (Electrically Activated ultra PVDF-TrFE Air Filter for High-Efficiency PM) 1.0 Filtration,2019, volume 29, pages 1903633.1-1903633.7), which describes that electrostatic force is introduced through electrostatic electret and triboelectric charging to further improve the adsorption capacity of the filter membrane. Under the influence of environmental factors, however, static charges can dissipate, resulting in a deterioration of the filtration performance of the material.
United states of America Cross science (iSience: Mass Production of Nanowire-Nylon Flexible vector Smart Windows for PM) 2.5 Capture,2019, volume 12, page 333-341), describes a filter that can be used to filter PM 2.5 The silver nanowire/nylon gauze material which is electrified with positive electricity adsorbs PM which is charged with opposite charges in advance through coulomb force 2.5 And (3) granules. The introduction of coulomb force can not only stably enhance the filtering performance of the material by consuming lower electric energy without being influenced by environment, but also can turn on/off the filtering system according to requirements. Although Ag nanowires have excellent conductivity and stability, they are expensive as noble metals.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a conductive sheet having better conductive performance, stability and PM 2.5 Copper nanowire composite gauze with filtering performance and preparation method thereofAnd antifog haze screen window.
The invention provides a preparation method of a copper nanowire composite gauze, which comprises the following steps:
s1) dispersing the copper nanowires in an alcohol solvent to obtain copper nanowire dispersion liquid;
s2) heating the gauze substrate, and spraying copper nanowire dispersion liquid on the surface to obtain the gauze substrate compounded with the conductive copper nanowires;
s3) dipping the gauze substrate compounded with the conductive copper nanowires in a solution containing a reducing agent to obtain the copper nanowire compound gauze.
Preferably, after the dipping treatment in the step S3), performing hydrophobic modification to obtain the copper nanowire composite gauze.
Preferably, the hydrophobic modification is modified by immersion in a solution containing a hydrophobic surface modifier; the hydrophobic surface modifier is selected from one or more of dodecyl mercaptan, octadecyl mercaptan and poly-p-phenylenediamine; the solvent in the solution containing the hydrophobic surface modifier is selected from alcohol solvents.
Preferably, the concentration of the solution containing the hydrophobic surface modifier is 0.3-1 mol/L; the time for dipping modification is 5-120 s.
Preferably, a dispersant is further added in the step S1); the dispersing agent is selected from one or more of polyvinylpyrrolidone, polyethyleneimine and ethyl cellulose; the mass of the dispersing agent is 1-5% of the total mass of the dispersing agent and the alcohol solvent.
Preferably, the concentration of the copper nanowires in the copper nanowire dispersion liquid is 0.1-3 mg/mL; the alcohol solvent is ethanol; the mesh number of the gauze substrate is 50-500 meshes.
Preferably, the heating temperature in the step S2) is 50-90 ℃; spraying is carried out by adopting a spray gun; the aperture of the spray gun is 0.3-0.7 mm; the distance between the spray gun and the gauze substrate is 5-20 cm during spraying; the ratio of the copper nano dispersion liquid to the gauze substrate is (5-50) mL:100cm 2 。
Preferably, the reducing agent is selected from one or more of sodium borohydride, potassium borohydride and hydrazine hydrate; the solvent in the solution containing the reducing agent comprises water and an alcohol solvent; the volume ratio of the water to the alcohol solvent is 1: (0.5 to 2); the concentration of the reducing agent in the solution containing the reducing agent is 0.3-1 mol/L; the time of the dipping treatment is 5-120 s.
The invention also provides the copper nanowire composite gauze prepared by the preparation method.
The invention also provides an anti-haze screen window which comprises the copper nanowire composite gauze prepared by the preparation method.
The invention provides a preparation method of a copper nanowire composite gauze, which comprises the following steps: s1) dispersing the copper nanowires in an alcohol solvent to obtain copper nanowire dispersion liquid; s2) heating the gauze substrate, and spraying copper nanowire dispersion liquid on the surface to obtain the gauze substrate compounded with the conductive copper nanowires; s3) dipping the gauze substrate compounded with the conductive copper nanowires in a solution containing a reducing agent to obtain the copper nanowire compound gauze. Compared with the prior art, the copper nanowire composite gauze with high conductivity is obtained by uniformly loading the copper nanowires on the gauze substrate through spraying and then welding the copper nanowires into a conductive network through chemical welding by using a reducing agent, and PM can be adsorbed by coulomb force 2.5 The balance of filtering performance and air permeability is realized, air purification can be realized in the state of air circulation, and meanwhile, the preparation method is simple, low in pollution, economical, low in cost and wide in application prospect.
Drawings
FIG. 1 is a scanning electron microscope image of purified copper nanowires in example 1 of the present invention;
FIG. 2 is a scanning electron microscope image of the purified copper nanowire in example 2 of the present invention;
fig. 3 is a photograph of copper nanowire/ethanol dispersion solutions prepared in examples 1 and 2 of the present invention;
FIG. 4 is a SEM photograph of a copper nanowire composite gauze obtained by using the gauze substrate in example 1 of the present invention;
fig. 5 is a photograph of a copper nanowire composite gauze obtained in example 1 and example 2 of the present invention;
fig. 6 is a spectrum of the copper nanowire composite gauze obtained in examples 1 and 2 of the present invention;
FIG. 7 shows PM of copper nanowire composite mesh obtained in examples 1 and 2 of the present invention 2.5 A test result graph of filtering ability;
FIG. 8 shows a PM in an embodiment of the present invention 2.5 A schematic diagram of a filtering capability testing device;
FIG. 9 shows that the copper nanowire composite gauze filters PM obtained in the embodiments 1 and 2 of the present invention 2.5 Schematic diagram of the principle of (1).
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a preparation method of a copper nanowire composite gauze, which comprises the following steps: s1) dispersing the copper nanowires in an alcohol solvent to obtain copper nanowire dispersion liquid; s2) heating the gauze substrate, and spraying copper nanowire dispersion liquid on the surface to obtain the gauze substrate compounded with the conductive copper nanowires; s3) dipping the gauze substrate compounded with the conductive copper nanowires in a solution containing a reducing agent to obtain the copper nanowire compound gauze.
In the present invention, the sources of all raw materials are not particularly limited, and they may be commercially available.
In the invention, the copper nanowire is obtained by preferably treating copper nanowire mother liquor with a purifying agent; the Copper nanowire mother liquor is preferably prepared according to a synthetic method reported In In Situ Seed-media High-Yield Synthesis of Copper Nanowires on Large Scale (Langmuir,2019, volume 35, page 4364-; in the embodiment provided by the invention, the copper nanowire mother liquor is prepared by the following method: mixing a copper source, a carbon source and organic amine in water, heating to 40-60 ℃, stirring to obtain a uniform reaction solution, heating to 70-80 ℃ for 15-30 h to generate copper nanoparticles, and finally continuously heating to 100-120 ℃ under the stirring condition to react for 15-30 h to obtain copper nanowire mother liquor; the copper source is preferably copper chloride; the carbon source is preferably glucose; the organic amine is preferably hexadecylamine; the purifying agent is preferably a mixed solution of water and trichloromethane or a mixed solution of normal hexane and ethanol; the volume ratio of water to trichloromethane in the mixed solution of water and trichloromethane is preferably 1: (0.5 to 2), more preferably 1: (0.8 to 1.5), and more preferably 1: (0.8 to 1.2), and most preferably 1: 1; the volume ratio of n-hexane to ethanol in the mixed solution of n-hexane and ethanol is preferably 1: (2-5), more preferably 1: (2-4), more preferably 1: (2.5 to 3.5), most preferably 1: 3; the treatment method preferably comprises the following specific steps: centrifuging the copper nanowire mother liquor, taking sediment and a purifying agent, uniformly mixing, standing for liquid separation, taking a lower layer solution, and centrifuging to obtain the copper nanowire; the centrifugation speed of the copper nanowire mother liquor is preferably 8000-15000 rpm, more preferably 8000-12000 rpm, and further preferably 10000 rpm; the centrifugation speed of the lower layer solution is preferably 5000-10000 rpm, more preferably 6000-9000 rpm, and still more preferably 8000 rpm.
Dispersing the copper nanowires in an alcohol solvent to obtain a copper nanowire dispersion liquid; the alcohol solvent is preferably ethanol; in order to improve the dispersibility of the copper nanowires, a dispersing agent is preferably added; the dispersant is preferably one or more of polyvinylpyrrolidone, polyethyleneimine and ethyl cellulose, and is more preferably polyvinylpyrrolidone; the mass of the dispersant is 1 to 5 percent of the total mass of the dispersant and the alcohol solvent, more preferably 2 to 4 percent, and still more preferably 2.5 to 3 percent; the concentration of the copper nanowires in the copper nanowire dispersion liquid is preferably 0.1-3 mg/mL, more preferably 0.5-2 mg/mL, and still more preferably 0.5-1 mg/mL.
Heating the gauze substrate, and spraying copper nanowire dispersion liquid on the surface to obtain the gauze substrate compounded with the conductive copper nanowires; the mesh number of the gauze substrate is preferably 50-500 meshes; the gauze substrate is preferably nylon gauze;the heating temperature is preferably 50-90 ℃, more preferably 50-80 ℃, and further preferably 60-70 ℃; in the invention, the spraying is preferably carried out by using a spray gun; the aperture of the spray gun is preferably 0.3-0.7 mm, more preferably 0.4-0.6 mm, and still more preferably 0.5 mm; the distance between the spray gun and the gauze substrate during spraying is preferably 5-20 cm, more preferably 8-15 cm, further preferably 8-12 cm, and most preferably 10 cm; the preferable ratio of the copper nano dispersion liquid to the gauze substrate is (5-50) mL:100cm 2 More preferably (10 to 50) mL:100cm 2 More preferably (20 to 50) mL:100cm 2 More preferably (30 to 50) mL:100cm 2 Most preferably 40mL:100cm 2 。
Dipping the gauze substrate compounded with the conductive copper nanowires in a solution containing a reducing agent; the reducing agent is preferably one or more of sodium borohydride, potassium borohydride and hydrazine hydrate, and more preferably sodium borohydride; the solvent in the solution containing the reducing agent preferably comprises water and an alcohol solvent; the volume ratio of water to alcohol solvent is preferably 1: (0.5-2). More preferably 1: (0.8 to 1.5), preferably 1: (0.8 to 1.2), and most preferably 1: 1; the concentration of the reducing agent in the solution containing the reducing agent is preferably 0.3-1 mol/L, more preferably 0.3-0.8 mol/L, more preferably 0.4-0.5 mol/L, and most preferably 0.5 mol/L; the time of the dipping treatment is preferably 5 to 120s, more preferably 10 to 100s, further preferably 20 to 80s, and most preferably 30 to 50 s; dispersing agents such as PVP (polyvinylpyrrolidone)
) The ligand hinders the contact of a Cu-Cu interface due to the abundant chemical bonding of carbonyl groups and the Cu surface, and influences the conductivity, after the reduction treatment process of reducing agent sodium borohydride, the dispersant PVP is reduced and removed, the Cu-Cu interface in direct contact is obtained, CuNWs is effectively subjected to 'chemical welding', an electron transmission channel is formed, and the conductivity is enhanced. After the dipping treatment, air drying is preferable, and blow drying with nitrogen is more preferable.
In order to improve the stability of the copper nanowire composite gauze, preferably, hydrophobic modification is also carried out; in the invention, the modification is carried out by dipping in a solution of a hydrophobic surface modifier; the hydrophobic surface modifier is preferably one or more of dodecyl mercaptan, octadecyl mercaptan and poly-p-phenylenediamine, and is more preferably dodecyl mercaptan; the solvent in the solution containing the hydrophobic surface modifier is preferably an alcohol solvent, and more preferably ethanol; the concentration of the solution containing the hydrophobic surface modifier is preferably 0.3-1 mol/L, more preferably 0.3-0.8 mol/L, more preferably 0.4-0.5 mol/L, and most preferably 0.5 mol/L; the time for the dipping modification is 5-120 s, more preferably 10-100 s, further preferably 20-80 s, and most preferably 30-50 s; the stability of the copper nanowire composite gauze can be improved through hydrophobic modification, so that the copper nanowire composite gauze can have high conductivity and high stability; after the impregnation modification, the obtained product is preferably air-dried, and more preferably dried by using nitrogen to obtain the copper nanowire composite gauze.
According to the invention, the copper nanowires are uniformly loaded on the gauze substrate through spraying, and then chemical welding is realized through the reducing agent to weld the copper nanowires to form the conductive network, so that the copper nanowire composite gauze with high conductivity is obtained, and PM can be adsorbed through Coulomb force 2.5 The balance of filtering performance and air permeability is realized, air purification can be realized in the state of air circulation, and meanwhile, the preparation method is simple, low in pollution, economical, low in cost and wide in application prospect.
The invention also provides the copper nanowire composite gauze prepared by the method.
The invention also provides an anti-haze screen window which comprises the copper nanowire composite gauze prepared by the preparation method.
In order to further illustrate the present invention, the following describes in detail a copper nanowire composite gauze, a preparation method thereof and an anti-haze screen window provided by the present invention with reference to examples.
The reagents used in the following examples are all commercially available.
Example 1
According to the synthesis method reported in the literature (Langmuir,2019, volume 35, page 4364-4369), copper nanowires are prepared: 85.5g of copper chloride dihydrate (CuCl) 2 ·2H 2 O), 99g glucose and 540 g Hexadecylamine (HDA) dispersionIn 40L of deionized water. The mixture was heated to 50 ℃ and stirred for 8 hours to form a uniform reaction solution of sky blue color. And then heated to 70 c for 24 hours to produce copper nanoparticles. And finally, heating the reaction solution for 24 hours at 100 ℃ under the stirring of 100rpm to prepare the copper nanowire mother liquor.
Centrifuging the obtained copper nanowire mother liquor at 10000rpm, dissolving the sediment in a water/chloroform (1:1 v: v) two-phase mixed solvent, shaking uniformly, standing for liquid separation, centrifuging the lower layer solution at 8000rpm, and obtaining pure copper nanowires.
Dissolving 20mg of copper nanowires in 40mL of 2.5 wt% PVP/ethanol solution to prepare a solution with a concentration of 0.5mg mL -1 The copper nanowire dispersion of (1).
Using a 0.5mm spray gun, the distance between the nozzle of the spray gun and the gauze substrate was controlled to 10cm, and 20mL (concentration: 0.5mg mL) -1 ) The copper nanowire dispersion was uniformly sprayed on both sides of a 10cm x 10cm gauze substrate (commercially available 200 mesh nylon gauze) heated at 60 ℃ (the ratio of the copper nanowire dispersion to the gauze substrate was 40mL:100 cm) 2 )。
After the spray coating was complete, the gauze substrate was immersed in 0.5M sodium borohydride (NaBH) 4 ) The obtained copper nanowire composite gauze is soaked in 0.5M dodecanethiol/ethanol solution for 30s after being dried by nitrogen gas for 30s, and then is dried by nitrogen gas to obtain the high-stability copper nanowire composite gauze.
The copper nanowires obtained by purification in example 1 were analyzed by a scanning electron microscope to obtain a scanning electron micrograph, as shown in fig. 1, of the copper nanowires on the upper layer and the copper nanowires on the lower layer.
Fig. 3(a) is a photograph of the prepared copper nanowire/ethanol solution with uniform dispersion.
The gauze substrate and the obtained copper nanowire composite gauze in example 1 were analyzed by a scanning electron microscope to obtain a scanning electron micrograph, which is shown in fig. 4.
Fig. 5(a) is a photograph showing a real object of the copper nanowire composite gauze obtained in example 1.
Characterization of the copper nanowire composite gauze obtained in example 1A spectrum (transmittance curve in the region of 400 to 800nm in wavelength) was obtained as shown in FIG. 6. The spectrum and the sheet resistance test characterization result of FIG. 6 show that the transmittance of the copper nanowire/gauze is about 70.1% at the wavelength of 550nm, and the sheet resistance is 50 Ω sq -1 And the resistance is not obviously increased after the film is placed in the air at normal temperature for 30 days.
Performing PM on the copper nanowire composite gauze 2.5 And (5) testing the filtering capability. The test results are shown in fig. 7, and the results show that the copper nanowire/gauze anti-haze screen window with 54.1% transmittance for PM 2.5 The removal efficiency of the catalyst reaches 99.2 percent, the pressure drop is 6Pa, and the quality factor is 0.8047Pa -1 . Prove its to PM 2.5 Has better filtering capacity.
Scanning electron microscope images: obtained by shooting through a Zeiss GeminiSEM 450 scanning electron microscope, and the accelerating voltage is 5 kV.
A spectrogram: the transmittance at a wavelength of 400-800 nm was measured by a UV2501PC/2550 UV-visible spectrometer from Shimadzu, Japan.
And (3) testing the sheet resistance: measured by a Suzhou crystal lattice M-3 hand-held four-probe resistivity tester.
PM 2.5 And (3) testing the filtering capacity: PM (particulate matter) 2.5 The particles are obtained by burning lignum Santali albi, generating negative ions by negative ion generator module, and detecting PM by CEM DT-9681 air quality detector 2.5 The concentration was varied and the pressure drop was measured by a standard GM510 digital manometer. The schematic diagram of the test apparatus is shown in fig. 8. The specific experimental operations were as follows: igniting sandalwood to generate a large amount of PM 2.5 The particles are diffused to the left testing cavity along with the airflow, the negative ion generator is started, the +5V direct current voltage is applied to the sample, and the PM of the right cavity is tested 2.5 Particle concentration change and pressure drop.
The filtration schematic diagram of the copper nanowire composite gauze in this embodiment is shown in fig. 8.
Example 2
Copper nanowires were prepared according to the synthesis method reported in the literature (Langmuir,2019, volume 35, page 4364-4369). The obtained copper nanowire mother liquor is centrifuged at 10000rpm, and sediment is taken to be dissolved by a mixed solvent of n-hexane/ethanol (1:3v: v). And centrifuging at 5000rpm, taking the sediment, repeating the centrifuging for three times to remove the organic ligand attached to the copper nanowire and separate the copper nanoparticles, wherein the final sediment is the purified copper nanowire.
Dissolving 20mg of copper nanowire in 40mL of ethanol solution to prepare the copper nanowire with the concentration of 0.5mg mL -1 The copper nanowire dispersion of (1).
Using a 0.5mm spray gun, with the distance between the nozzle of the spray gun and the gauze substrate controlled to 10cm, 20mL (concentration of 0.5mg mL) was added -1 ) The copper nanowire dispersion was uniformly sprayed on both sides of a 10cm by 10cm gauze substrate heated at 60 deg.C (the ratio of the copper nanowire dispersion to the gauze substrate was 40mL:100 cm) 2 ) And obtaining the copper nanowire composite gauze.
The copper nanowires obtained by purification in example 2 were analyzed by a scanning electron microscope to obtain a scanning electron micrograph, and as shown in fig. 2, it was found that some copper nanoparticles still existed. Fig. 3(b) shows that the copper nanowire/ethanol dispersion solution prepared in example 2 has poor dispersibility and delamination due to no dispersant treatment.
Fig. 5(b) is a photograph showing the copper nanowire composite gauze obtained in example 2, in which the copper nanowires are unevenly distributed on the nylon gauze.
The copper nanowire composite gauze obtained in example 2 was characterized, and a spectrogram (transmittance curve in a region with a wavelength of 400-800 nm) thereof was obtained as shown in fig. 6. The spectrum and the sheet resistance test characterization result of fig. 6 show that the transmittance of the copper nanowire composite gauze is about 53.0% under the wavelength of 550nm, and the sheet resistance is 500 Ω sq -1 Left and right.
Performing PM on the copper nanowire composite gauze 2.5 And (5) testing the filtering capability. The test results are shown in fig. 7, which shows that the copper nanowire composite mesh of example 2 is for PM 2.5 The removal efficiency of (2) is 21.5%, and the requirement of haze prevention cannot be met.
In contrast, the dispersion method of the present example cannot completely separate the copper nanowires from the copper nanoparticles, and the purified copper nanowires are still doped with a small amount of copper nanoparticles; the copper nanowire treated without the dispersant has poor dispersibilityThe solution is difficult to form stable alcohol solution, and cannot be uniformly adhered to the nylon gauze by spraying, so that the conductivity is poor, the sheet resistance is not uniform, and the sheet resistance is about 500-2000 omega sq -1 . And because of no stabilizer treatment, the screen window can be oxidized after being placed in the air at normal temperature for 1 day, and the resistance is increased to megaohm level, so that the screen window can not be applied to haze prevention screen windows.
Claims (10)
1. A preparation method of copper nanowire composite gauze is characterized by comprising the following steps:
s1) dispersing the copper nanowires in an alcohol solvent to obtain copper nanowire dispersion liquid;
s2) heating the gauze substrate, and spraying copper nanowire dispersion liquid on the surface to obtain the gauze substrate compounded with the conductive copper nanowires;
s3) dipping the gauze substrate compounded with the conductive copper nanowires in a solution containing a reducing agent to obtain the copper nanowire compound gauze.
2. The preparation method of claim 1, wherein after the dipping treatment in the step S3), the hydrophobic modification is further performed to obtain the copper nanowire composite gauze.
3. The method according to claim 2, wherein the hydrophobic modification is modified by immersion in a solution containing a hydrophobic surface modifier; the hydrophobic surface modifier is selected from one or more of dodecyl mercaptan, octadecyl mercaptan and poly-p-phenylenediamine; the solvent in the solution containing the hydrophobic surface modifier is selected from alcohol solvents.
4. The method according to claim 3, wherein the solution containing the hydrophobic surface modifier has a concentration of 0.3 to 1 mol/L; the time for the dipping modification is 5-120 s.
5. The method according to claim 1, wherein a dispersant is further added in step S1); the dispersant is selected from one or more of polyvinylpyrrolidone, polyethyleneimine and ethyl cellulose; the mass of the dispersing agent is 1-5% of the total mass of the dispersing agent and the alcohol solvent.
6. The preparation method according to claim 1, wherein the concentration of the copper nanowires in the copper nanowire dispersion is 0.1-3 mg/mL; the alcohol solvent is ethanol; the mesh number of the gauze substrate is 50-500 meshes.
7. The method according to claim 1, wherein the heating temperature in the step S2) is 50 ℃ to 90 ℃; spraying is carried out by adopting a spray gun; the aperture of the spray gun is 0.3-0.7 mm; the distance between the spray gun and the gauze substrate is 5-20 cm during spraying; the ratio of the copper nano dispersion liquid to the gauze substrate is (5-50) mL:100cm 2 。
8. The preparation method according to claim 1, wherein the reducing agent is selected from one or more of sodium borohydride, potassium borohydride and hydrazine hydrate; the solvent in the solution containing the reducing agent comprises water and an alcohol solvent; the volume ratio of the water to the alcohol solvent is 1: (0.5 to 2); the concentration of the reducing agent in the solution containing the reducing agent is 0.3-1 mol/L; the time of the dipping treatment is 5-120 s.
9. The copper nanowire composite gauze prepared by the preparation method of any one of claims 1 to 8.
10. An anti-haze screen window, which is characterized by comprising the copper nanowire composite gauze prepared by the preparation method of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210480046.2A CN114908561B (en) | 2022-05-05 | 2022-05-05 | Copper nanowire composite gauze, preparation method thereof and anti-haze screen window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210480046.2A CN114908561B (en) | 2022-05-05 | 2022-05-05 | Copper nanowire composite gauze, preparation method thereof and anti-haze screen window |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114908561A true CN114908561A (en) | 2022-08-16 |
| CN114908561B CN114908561B (en) | 2023-06-16 |
Family
ID=82766013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210480046.2A Active CN114908561B (en) | 2022-05-05 | 2022-05-05 | Copper nanowire composite gauze, preparation method thereof and anti-haze screen window |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114908561B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115612181A (en) * | 2022-10-28 | 2023-01-17 | 山东大学 | Composite aerogel for electromagnetic interference shielding and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040144958A1 (en) * | 2003-01-29 | 2004-07-29 | Conaghan Brian F. | High conductivity inks with improved adhesion |
| WO2016166074A1 (en) * | 2015-04-16 | 2016-10-20 | Rent A Scientist Gmbh | Disperse formulation containing metal nanoparticles |
| CN109224695A (en) * | 2018-10-18 | 2019-01-18 | 青岛诺康环保科技有限公司 | A kind of anti-haze method of used in room with dust-proof function based on Buddha's warrior attendant grenadine window |
| CN110075815A (en) * | 2019-05-24 | 2019-08-02 | 西北大学 | Novel haze high efficiency filter silver nanoparticle gauze and the compound porous fiber membrane material of MOFs and preparation method thereof |
| CN113689974A (en) * | 2021-07-19 | 2021-11-23 | 华南理工大学 | Metal nanowire transparent electrode and preparation method thereof |
-
2022
- 2022-05-05 CN CN202210480046.2A patent/CN114908561B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040144958A1 (en) * | 2003-01-29 | 2004-07-29 | Conaghan Brian F. | High conductivity inks with improved adhesion |
| WO2016166074A1 (en) * | 2015-04-16 | 2016-10-20 | Rent A Scientist Gmbh | Disperse formulation containing metal nanoparticles |
| CN109224695A (en) * | 2018-10-18 | 2019-01-18 | 青岛诺康环保科技有限公司 | A kind of anti-haze method of used in room with dust-proof function based on Buddha's warrior attendant grenadine window |
| CN110075815A (en) * | 2019-05-24 | 2019-08-02 | 西北大学 | Novel haze high efficiency filter silver nanoparticle gauze and the compound porous fiber membrane material of MOFs and preparation method thereof |
| CN113689974A (en) * | 2021-07-19 | 2021-11-23 | 华南理工大学 | Metal nanowire transparent electrode and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115612181A (en) * | 2022-10-28 | 2023-01-17 | 山东大学 | Composite aerogel for electromagnetic interference shielding and preparation method thereof |
| CN115612181B (en) * | 2022-10-28 | 2023-09-22 | 山东大学 | Composite aerogel for electromagnetic interference shielding and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114908561B (en) | 2023-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mwafy et al. | Tailored MWCNTs/SnO2 decorated cellulose nanofiber adsorbent for the removal of Cu (II) from waste water | |
| Wang et al. | Electrospinning: A facile technique for fabricating functional nanofibers for environmental applications | |
| Zhao et al. | Charged graphene aerogel filter enabled superior particulate matter removal efficiency in harsh environment | |
| Tong et al. | Multi-functional nanohybrid of ultrathin molybdenum disulfide nanosheets decorated with cerium oxide nanoparticles for preferential uptake of lead (II) ions | |
| Xu et al. | Electrospun polyacrylonitrile-based lace nanostructures and their Cu (Ⅱ) adsorption | |
| CN108404687B (en) | Preparation method of multi-layer functional film for air purification | |
| CN104587841B (en) | Conductive filter membrane and preparation method and application thereof | |
| JP2009001481A (en) | Carbon nanotube composition including metal precursor, carbon nanotube thin film and its manufacturing method | |
| CN106345426A (en) | Method for preparing nanocellulose for efficiently adsorbing heavy metal ions from natural fallen leaves | |
| CN114908561A (en) | Copper nanowire composite gauze, preparation method thereof and anti-haze screen window | |
| CN107976431B (en) | Surface enhanced Raman substrate based on metal nanoparticles and preparation method thereof | |
| CN106457100B (en) | Heavy metal recovery process and the material for being conducive to this process | |
| Kim et al. | Transparent metallized microfibers as recyclable electrostatic air filters with ionization | |
| CN104667766A (en) | Polyether sulfone/graphene oxide composite membrane as well as preparation method and application thereof | |
| Zhang et al. | Electrostatic polyester air filter composed of conductive nanowires and photocatalytic nanoparticles for particulate matter removal and formaldehyde decomposition | |
| Xu et al. | Gold recovery from E-waste using freestanding nanopapers of cellulose and ionic covalent organic frameworks | |
| Wang et al. | Floating and stable gC 3 N 4/PMMA/CFs porous film: an automatic photocatalytic reaction platform for dye water treatment under solar light | |
| Yadav et al. | HMO-incorporated electrospun nanofiber recyclable membranes: Characterization and adsorptive performance for Pb (II) and As (V) | |
| KR102169831B1 (en) | A substrate for surface enhanced raman scattering and fabricating method of the same | |
| KR102120735B1 (en) | Membrane Comprising Metal Substrate Layer and CNT/Chitosan Nano Hybrid Coating Layer and Electrostatic Dust Collector System Comprising the Same | |
| CN107159157A (en) | Contain heavy metal ion blotting cross-linked chitosan nano fibrous membrane and preparation method thereof | |
| Ji et al. | Electrospun heterojunction nanofibrous membranes for photoinduced enhancement of fine particulate matter capture in harsh environment | |
| Su et al. | Necklace-like fiber composite membrane for high-efficiency particulate matter capture | |
| Ma et al. | Bioinspired PM2. 5 filter: An AgNWs reinforced PAN/PVP composite membrane with the porous and multilayered network structure | |
| KR102529173B1 (en) | Graphene-coated cellulose paper electrode and manufacturing method for the same, and fine dust removal apparatus using cellulose paper electrode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |