CN114477342A - All-weather graphene-based seawater desalination fiber membrane and preparation method thereof - Google Patents
All-weather graphene-based seawater desalination fiber membrane and preparation method thereof Download PDFInfo
- Publication number
- CN114477342A CN114477342A CN202210101743.2A CN202210101743A CN114477342A CN 114477342 A CN114477342 A CN 114477342A CN 202210101743 A CN202210101743 A CN 202210101743A CN 114477342 A CN114477342 A CN 114477342A
- Authority
- CN
- China
- Prior art keywords
- graphene
- fiber membrane
- layer
- weather
- seawater desalination
- 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.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 92
- 239000012528 membrane Substances 0.000 title claims abstract description 90
- 239000000835 fiber Substances 0.000 title claims abstract description 78
- 239000013535 sea water Substances 0.000 title claims abstract description 60
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000002121 nanofiber Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000004744 fabric Substances 0.000 claims abstract description 16
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 15
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000007639 printing Methods 0.000 claims abstract description 6
- 239000012046 mixed solvent Substances 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 15
- 238000010041 electrostatic spinning Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 15
- 239000006185 dispersion Substances 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 12
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 238000009987 spinning Methods 0.000 claims description 8
- 239000004952 Polyamide Substances 0.000 claims description 7
- 229920002647 polyamide Polymers 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- -1 polyethylene terephthalate Polymers 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 5
- 239000004925 Acrylic resin Substances 0.000 claims description 5
- 238000007731 hot pressing Methods 0.000 claims description 5
- 238000000967 suction filtration Methods 0.000 claims description 5
- 238000007654 immersion Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 238000007590 electrostatic spraying Methods 0.000 claims description 2
- 238000001523 electrospinning Methods 0.000 claims 1
- 238000001704 evaporation Methods 0.000 abstract description 14
- 230000008020 evaporation Effects 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 238000010521 absorption reaction Methods 0.000 description 9
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 8
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000002791 soaking Methods 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- FDPIMTJIUBPUKL-UHFFFAOYSA-N dimethylacetone Natural products CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 description 2
- 235000019253 formic acid Nutrition 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- 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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses an all-weather graphene-based seawater desalination fiber membrane and a preparation method thereof, and belongs to the technical field of seawater desalination. It includes: the graphene oxide layer on the top layer and the conductive nanofiber membrane layer on the bottom layer; the preparation of the conductive nanofiber membrane comprises the following steps: modifying the fiber felt by adopting graphene/carbon nano tubes to obtain conductive fiber membrane cloth; and printing a conductive electrode on the surface of the conductive fiber membrane cloth. The all-weather graphene-based seawater desalination fiber membrane disclosed by the invention is of a double-layer structure, namely a graphene oxide layer at the top layer and a conductive nanofiber membrane layer at the bottom layer. Under the condition of the sun, the graphene oxide layer on the top layer and the conductive nanofiber membrane layer on the bottom layer can absorb infrared rays in sunlight, a certain temperature is obtained through a photothermal effect, and seawater evaporation is promoted; under the condition of no sunlight, the conductive nanofiber layer at the bottom layer can generate Joule heat under the condition of electrification, and the normal operation of the seawater evaporation process is ensured.
Description
Technical Field
The invention relates to the technical field of seawater desalination, in particular to an all-weather graphene-based seawater desalination fiber membrane and a preparation method thereof.
Background
Shortage of drinking water is one of the most important challenges worldwide. Recently, solar photo-thermal seawater desalination/purification technology based on air/water interface has attracted academic and industrial attention. Unlike the conventional solar evaporation technology, which obtains steam by heating a whole block of water, the new technology focuses heat at the air/liquid interface, thereby minimizing heat loss and rapidly changing water into steam, thereby greatly improving the efficiency of steam generation. Although not yet implemented in large plants, it is expected that solar seawater desalination/water purification technologies based on photothermal materials will be economical and sustainable technologies for producing clean water and reducing the amount of wastewater.
The rate of interface evaporation realized by solar photo-heat is not stable enough, and the use effect is poor in environments such as cloudy days, nights and indoor due to the influence of factors such as weather and day and night irradiation change of sunlight. If a physical device is adopted to collect sunlight to enhance energy, the cost is high, and the method is also one of the main reasons that a plurality of solar devices are difficult to popularize and apply in a large area at present. The power supply based on clean energy (such as solar energy, wind and the like) is applied on a large scale, particularly the offline power cost is reduced year by year, and a new opportunity is provided for interface evaporation adopting new energy for power supply.
Disclosure of Invention
The invention aims to provide an all-weather graphene-based seawater desalination fiber membrane and a preparation method thereof, and aims to solve the problem that the existing all-weather seawater evaporation desalination treatment is difficult to realize under the influence of illumination or weather.
The technical scheme for solving the technical problems is as follows:
an all-weather graphene-based seawater desalination fiber membrane, comprising: the graphene oxide layer on the top layer and the conductive nanofiber membrane layer on the bottom layer;
the preparation of the conductive nanofiber membrane comprises the following steps: modifying the fiber felt by adopting graphene/carbon nano tubes to obtain conductive fiber membrane cloth; and printing a conductive electrode on the surface of the conductive fiber membrane cloth.
In the present invention, the conductive electrode includes a silver electrode or a copper electrode.
Further, in the all-weather graphene-based seawater desalination fiber membrane, the fiber mat is prepared by the following method: dissolving the fibrofelt raw material by using a mixed solvent to obtain a spinning solution with the concentration of 9-13 wt%, and performing electrostatic spinning by using a multi-needle electrostatic spinning technology to obtain the fibrofelt.
The yield of the multi-needle electrostatic spinning technology adopted in the invention is far higher than that of a single needle, but the needle has almost no yield.
In the present invention, the mixed solvent includes: the volume ratio is 1: (1-3) a mixed solvent of phenol and tetrachloroethane, wherein the volume ratio is 1: (1-3) a mixed solvent of toluene and xylene, wherein the volume ratio is 1: (1-3) a mixed solvent of formic acid and acetic acid, wherein the volume ratio of the mixed solvent is 1: (1-3) a mixed solvent of tetrahydrofuran and cyclohexanone, wherein the volume ratio is 1: (1-3) the volume ratio of the mixed solvent of dimethyl sulfoxide and acetone is 1: (1-3) a mixed solvent of dimethylformamide and dimethylsulfoxide.
Further, in the all-weather graphene-based seawater desalination fiber membrane, the fiber felt comprises the following raw materials: polyethylene terephthalate, polypropylene, polyamide, polyvinyl chloride, polyacrylonitrile or polyurethane.
Further, in the all-weather graphene-based seawater desalination fiber membrane, the electrostatic spinning process parameters include: the voltage is 15-20 kV; the distance between the needle head and the receiving stick is 13-20 cm; the speed of a single needle head is 0.1 mL/min; the ambient temperature is 20-25 ℃; the relative humidity is 25-30%.
In the invention, by optimizing the spinning process parameters, the fiber diameter distribution of the obtained fiber felt is more uniform, which is beneficial to the subsequent modification of graphene/carbon nano tubes and the obtaining of the conductive fiber membrane cloth with stable resistance.
Further, in the all-weather graphene-based seawater desalination fiber membrane, the gram weight of the fiber felt is 100-200 g/m2。
The larger the grammage of the fiber mat, the thicker the fiber mat, and the thicker the fiber mat, the lower its electrical resistance, and the higher the heating temperature at the same voltage, which is more favorable for evaporation. However, the grammage of the fiber felt is still the limit of the spinning process because the grammage of the fiber felt is 100-200 g/m2Is not only beneficial to spinning, but also is electrifiedThe resistance is optimal.
Further, in the all-weather graphene-based seawater desalination fiber membrane, the modification treatment comprises: immersing the fibrofelt into 5-10 wt% graphene/carbon nano tube mixed dispersion liquid, wherein the immersion temperature is 40-50 ℃, and the immersion time is 0.5-1 h; taking out, squeezing, drying, and carrying out hot pressing at 200-250 ℃ under the pressure of 8-15 kg for 0.5-3 min to obtain the conductive fiber membrane cloth.
In the invention, operations such as ultrasonic treatment, oscillation and the like can also be carried out in the soaking process.
Further, in the all-weather graphene-based seawater desalination fiber membrane, the mass ratio of graphene to carbon nanotubes in the graphene/carbon nanotube mixed dispersion liquid is (5-10): 1. the graphene is obtained by a physical stripping method.
In the invention, the fiber felt is modified by mixing the graphene and the carbon nano tube, has the advantages of the graphene and the carbon nano tube, can be used as a multi-dimensional conductive filler to form more conductive paths, and is more beneficial to improving the conductivity of the fiber felt.
In the invention, the surface resistance of the conductive fiber membrane cloth is 5-50 omega/sq.
Further, in the all-weather graphene-based seawater desalination fiber membrane, the gram weight of the graphene oxide layer is 2-10 g/m2。
In the invention, the gram weight of the graphene oxide layer is 2-10 g/m2The composite material has better interface bonding force, large specific surface area and capability of absorbing more heat.
The invention also provides a preparation method of the all-weather graphene-based seawater desalination fiber membrane, which comprises the following steps:
pouring the graphene oxide dispersion liquid with the concentration of 0.2-1 wt% onto the conductive nanofiber membrane layer, performing suction filtration to form a graphene oxide layer on the conductive nanofiber membrane layer, and drying;
and (3) electrostatic spraying polymer superfine liquid drops on the surface of the graphene oxide layer, and drying.
Further, in the preparation method of the all-weather graphene-based seawater desalination fiber membrane, the polymer ultrafine droplets comprise: the aqueous polyurethane superfine droplets or the acrylic resin superfine droplets.
The invention has the following beneficial effects:
1. the all-weather graphene-based seawater desalination fiber membrane disclosed by the invention is of a double-layer structure, namely a graphene oxide layer at the top layer and a conductive nanofiber membrane layer at the bottom layer. Under the condition of the sun, the graphene oxide layer on the top layer and the conductive nanofiber membrane layer on the bottom layer can absorb infrared rays in sunlight, a certain temperature is obtained through a photothermal effect, and seawater evaporation is promoted; under the condition of no sunlight, the conductive nanofiber layer at the bottom layer can generate Joule heat under the condition of electrification, and the normal operation of the seawater evaporation process is ensured. Therefore, the seawater desalination can be ensured to work all the day.
2. The graphene oxide in the graphene oxide layer contains abundant surface groups and an ultra-large specific surface area, and can promote uniform spreading and absorption of water, absorption of infrared rays and heat enrichment, so that the whole seawater desalination fiber membrane always obtains the maximum treatment efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of an all-weather graphene-based fiber membrane for seawater desalination according to the present invention;
in the figure, 1-graphene oxide layer; 2-a conductive nanofiber membrane layer; 3-conductive electrode.
Detailed Description
The principles and features of the present invention are described below in conjunction with the embodiments and the accompanying drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
Referring to fig. 1, the all-weather graphene-based seawater desalination fiber membrane of the present invention has a double-layer structure, wherein the top layer is a graphene oxide layer, and the bottom layer is a conductive nanofiber membrane layer. And a conductive electrode is printed on the conductive nanofiber membrane layer, and the conductive electrode is connected to a power supply through a lead to supply power to the conductive nanofiber membrane layer, so that joule heat is generated, and the normal operation of the seawater evaporation process is ensured.
The solar interface evaporation technology is a process of evaporating seawater to produce desalinated water by utilizing solar photo-thermal conversion, and means that an absorber fully absorbs sunlight, and converts light energy into heat energy which is continuously transferred to water molecules on an air interface, so that water and the water molecules continuously generate steam to escape. The seawater desalination device takes a porous photothermal absorption material as a medium, soaks the surface under the hydrophilicity of the material, and is heated and evaporated by the irradiation of sunlight, so that the seawater desalination is realized. To achieve a high efficiency of solar energy conversion to steam, the following conditions are met for the absorber: (1) the absorbent material needs to remain on the water surface; (2) the absorber needs to have a high solar absorption rate; (3) the absorption of energy requires efficient heating of the water layer in contact with the absorber to achieve the water-to-steam conversion process quickly and efficiently.
The graphene oxide in the graphene oxide layer contains abundant surface groups and an ultra-large specific surface area, and can promote uniform spreading and absorption of water, absorption of infrared rays and heat enrichment, so that the whole seawater desalination fiber membrane always obtains the maximum treatment efficiency. The graphene oxide layer is a water absorption layer, has high specific surface area and far infrared absorption and temperature rise capacity, strong water storage capacity and high heating and heat preservation efficiency. The resistance of the conductive nanofiber membrane layer is low, and the available temperature is high under the drive of the same voltage. Under the condition of the sun, the graphene oxide layer on the top layer and the conductive nanofiber membrane layer on the bottom layer can absorb infrared rays in sunlight, a certain temperature is obtained through a photothermal effect, and seawater evaporation is promoted; under the condition of no sunlight, the conductive nanofiber layer at the bottom layer can generate Joule heat under the condition of electrification, and the normal operation of the seawater evaporation process is ensured. Therefore, the seawater desalination can be ensured to work in all weather.
The polyamide in the fiber mat stock in the following examples may also be replaced by polyethylene terephthalate, polypropylene, polyvinyl chloride, polyacrylonitrile or polyurethane. The mixed solvent may also be replaced with a mixed solvent of toluene and xylene, a mixed solvent of formic acid and acetic acid, a mixed solvent of tetrahydrofuran and cyclohexanone, a mixed solvent of dimethyl sulfoxide and acetone, or a mixed solvent of dimethylformamide and dimethyl sulfoxide. The silver electrode may also be replaced by a copper electrode. The aqueous polyurethane superfine droplets can also be replaced by acrylic resin superfine droplets.
Example 2
The all-weather graphene-based seawater desalination fiber membrane of the embodiment comprises: the graphene oxide layer on the top layer and the conductive nanofiber membrane layer on the bottom layer.
Wherein the gram weight of the graphene oxide layer is 2g/m2。
The conductive nanofiber membrane is prepared by the following method:
(1) the volume ratio is 1: 1, dissolving a fibrofelt raw material polyamide by using a mixed solvent of phenol and tetrachloroethane to obtain a spinning solution with the concentration of 9 wt%, and performing electrostatic spinning by using a multi-needle electrostatic spinning technology to obtain the fibrofelt with the gram weight of 100g/m2A fiber mat;
the technological parameters of electrostatic spinning comprise: the voltage is 15 kV; the distance between the needle head and the receiving stick is 13 cm; the speed of a single needle head is 0.1 mL/min; the ambient temperature is 20 ℃; the relative humidity was 25%.
(2) Soaking the fibrofelt into 5 wt% graphene/carbon nanotube mixed dispersion liquid at the temperature of 40 ℃ for 0.5 h; taking out, squeezing, drying, and hot-pressing at 200 deg.C under 8kg pressure for 3min to obtain conductive fiber membrane cloth with surface resistance of 35 Ω/sq;
(3) and printing a silver electrode on the surface of the conductive fiber membrane cloth to obtain the conductive nanofiber membrane.
The preparation method of the all-weather graphene-based seawater desalination fiber membrane comprises the following steps:
(1) pouring the graphene oxide dispersion liquid with the concentration of 0.2 wt% onto the conductive nanofiber membrane layer, performing suction filtration to form a graphene oxide layer on the conductive nanofiber membrane layer, and drying;
(2) and (3) electrostatically spraying waterborne polyurethane superfine droplets on the surface of the graphene oxide layer, and drying.
Example 3
The all-weather graphene-based seawater desalination fiber membrane of the embodiment comprises: the graphene oxide layer on the top layer and the conductive nanofiber membrane layer on the bottom layer.
Wherein the gram weight of the graphene oxide layer is 6g/m2。
The conductive nanofiber membrane is prepared by the following method:
(1) the volume ratio is 1: 2, dissolving the fibrofelt raw material polyamide by using a mixed solvent of phenol and tetrachloroethane to obtain a spinning solution with the concentration of 10 wt%, and performing electrostatic spinning by using a multi-needle electrostatic spinning technology to obtain the fibrofelt with the gram weight of 150g/m2A fiber mat.
The technological parameters of electrostatic spinning comprise: the voltage is 17 kV; the distance between the needle head and the receiving stick is 16 m; the speed of a single needle head is 0.1 mL/min; the ambient temperature is 23 ℃; the relative humidity was 27%.
(2) Soaking the fibrofelt into a mixed dispersion liquid of graphene/carbon nano tubes with the concentration of 7 wt%, wherein the soaking temperature is 45 ℃, and the soaking time is 1 h; taking out, squeezing, drying, and hot-pressing at 230 deg.C under 10kg pressure for 1.5min to obtain conductive fiber membrane cloth with surface resistance of 25 Ω/sq;
(3) and printing a silver electrode on the surface of the conductive fiber membrane cloth to obtain the conductive nanofiber membrane.
The preparation method of the all-weather graphene-based seawater desalination fiber membrane comprises the following steps:
(1) pouring the graphene oxide dispersion liquid with the concentration of 0.6 wt% onto the conductive nanofiber membrane layer, performing suction filtration to form a graphene oxide layer on the conductive nanofiber membrane layer, and drying;
(2) and (3) electrostatically spraying waterborne polyurethane superfine droplets or acrylic resin superfine droplets on the surface of the graphene oxide layer, and drying.
Example 4
The all-weather graphene-based seawater desalination fiber membrane of the embodiment comprises: the graphene oxide layer on the top layer and the conductive nanofiber membrane layer on the bottom layer.
Wherein the gram weight of the graphene oxide layer is 10g/m2。
The conductive nanofiber membrane is prepared by the following method:
(1) the volume ratio is 1: 3, dissolving the polyamide serving as the fiber felt raw material by using a mixed solvent of phenol and tetrachloroethane to obtain a spinning solution with the concentration of 13 wt%, and performing electrostatic spinning by using a multi-needle electrostatic spinning technology to obtain the polyamide with the gram weight of 200g/m2A fiber mat.
The technological parameters of electrostatic spinning comprise: the voltage is 20 kV; the distance between the needle head and the receiving stick is 20 cm; the speed of a single needle head is 0.1 mL/min; the ambient temperature is 25 ℃; the relative humidity was 30%.
(2) Soaking the fibrofelt into 10 wt% graphene/carbon nanotube mixed dispersion liquid at 50 ℃ for 1 h; taking out, squeezing, drying, and hot-pressing at 250 deg.C under 15kg pressure for 0.5min to obtain conductive fiber membrane cloth with surface resistance of 15 Ω/sq;
(3) and printing a silver electrode on the surface of the conductive fiber membrane cloth to obtain the conductive nanofiber membrane.
The preparation method of the all-weather graphene-based seawater desalination fiber membrane comprises the following steps:
(1) pouring the graphene oxide dispersion liquid with the concentration of 1 wt% onto the conductive nanofiber membrane layer, performing suction filtration to form a graphene oxide layer on the conductive nanofiber membrane layer, and drying;
(2) and (3) electrostatically spraying waterborne polyurethane superfine droplets or acrylic resin superfine droplets on the surface of the graphene oxide layer, and drying.
Test examples
The all-weather graphene-based seawater desalination fiber membrane prepared in the embodiment 2 is placed in seawater with the width of 60cm, and then the seawater is evaporated by absorbing sunlight in daytime, wherein the water yield of the freshwater is 6-10 kg/m per day2In night or non-sunny days, joule heat is generated by electrifying to heat seawater, and the water yield of the fresh water is 8-20 kg/m per day2. Comprehensive calculation shows that the water yield of the all-weather graphene-based seawater desalination fiber membrane can be improved by 30-100% compared with that of a common sunlight type seawater desalination evaporator.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An all-weather graphene-based seawater desalination fiber membrane is characterized by comprising: the graphene oxide layer on the top layer and the conductive nanofiber membrane layer on the bottom layer;
the preparation of the conductive nanofiber membrane comprises the following steps: modifying the fiber felt by adopting graphene/carbon nano tubes to obtain conductive fiber membrane cloth; and printing a conductive electrode on the surface of the conductive fiber membrane cloth.
2. The all-weather graphene-based seawater desalination fiber membrane of claim 1, wherein the fiber mat is prepared by the following method: dissolving the fibrofelt raw material by using a mixed solvent to obtain a spinning solution with the concentration of 9-13 wt%, and performing electrostatic spinning by using a multi-needle electrostatic spinning technology to obtain the fibrofelt.
3. The all-weather graphene-based seawater desalination fiber membrane of claim 2, wherein the fiber mat raw material comprises: polyethylene terephthalate, polypropylene, polyamide, polyvinyl chloride, polyacrylonitrile or polyurethane.
4. The all-weather graphene-based seawater desalination fiber membrane of claim 2, wherein the process parameters of electrospinning comprise: the voltage is 15-20 kV; the distance between the needle head and the receiving stick is 13-20 cm; the speed of a single needle head is 0.1 mL/min; the ambient temperature is 20-25 ℃; the relative humidity is 25-30%.
5. The all-weather graphene-based seawater desalination fiber membrane as claimed in any one of claims 1 to 4, wherein the gram weight of the fiber mat is 100-200 g/m2。
6. The all-weather graphene-based seawater desalination fiber membrane of claim 5, wherein the modification treatment comprises: immersing the fibrofelt into 5-10 wt% graphene/carbon nanotube mixed dispersion liquid, wherein the immersion temperature is 40-50 ℃, and the immersion time is 0.5-1 h; taking out, squeezing, drying, and carrying out hot pressing for 0.5-3 min at 200-250 ℃ under the pressure of 8-15 kg to obtain the conductive fiber membrane cloth.
7. The all-weather graphene-based seawater desalination fiber membrane as claimed in claim 6, wherein the mass ratio of graphene to carbon nanotubes in the graphene/carbon nanotube mixed dispersion liquid is (5-10): 1.
8. the all-weather graphene-based seawater desalination fiber membrane as claimed in claim 5, wherein the gram weight of the graphene oxide layer is 2-10 g/m2。
9. The preparation method of the all-weather graphene-based seawater desalination fiber membrane according to any one of claims 1 to 8, which comprises the following steps:
pouring the graphene oxide dispersion liquid with the concentration of 0.2-1 wt% onto the conductive nanofiber membrane layer, performing suction filtration to form a graphene oxide layer on the conductive nanofiber membrane layer, and drying;
and (3) electrostatic spraying polymer superfine liquid drops on the surface of the graphene oxide layer, and drying.
10. The method for preparing the all-weather graphene-based fiber membrane for seawater desalination of claim 9, wherein the polymer ultra-fine droplets comprise: the aqueous polyurethane superfine droplets or the acrylic resin superfine droplets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210101743.2A CN114477342A (en) | 2022-01-27 | 2022-01-27 | All-weather graphene-based seawater desalination fiber membrane and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210101743.2A CN114477342A (en) | 2022-01-27 | 2022-01-27 | All-weather graphene-based seawater desalination fiber membrane and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114477342A true CN114477342A (en) | 2022-05-13 |
Family
ID=81476808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210101743.2A Pending CN114477342A (en) | 2022-01-27 | 2022-01-27 | All-weather graphene-based seawater desalination fiber membrane and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114477342A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115198519A (en) * | 2022-07-15 | 2022-10-18 | 武汉纺织大学 | High-efficiency photothermal conversion hydrophilic/hydrophobic fiber felt and preparation method thereof |
| CN116061510A (en) * | 2022-12-07 | 2023-05-05 | 南通大学 | Multilayer self-adjusting composite non-woven material, preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150353385A1 (en) * | 2014-06-09 | 2015-12-10 | King Abdullah University Of Science And Technology | Hydrophobic photothermal membranes, devices including the hydrophobic photothermal membranes, and methods for solar desalination |
| US20170157570A1 (en) * | 2014-07-17 | 2017-06-08 | The Research Foundation For The State University Of New York | Porous graphene based composite membranes for nanofiltration, desalination, and pervaporation |
| CN110723769A (en) * | 2019-09-27 | 2020-01-24 | 厦门大学 | Continuous seawater desalination device and method |
| CN112760822A (en) * | 2020-12-29 | 2021-05-07 | 武汉纺织大学 | Degradable photothermal conversion film material and preparation method thereof |
| CN113713638A (en) * | 2021-10-14 | 2021-11-30 | 山东海科创新研究院有限公司 | Double-layer high-strength super-hydrophobic separation membrane and preparation method and application thereof |
-
2022
- 2022-01-27 CN CN202210101743.2A patent/CN114477342A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150353385A1 (en) * | 2014-06-09 | 2015-12-10 | King Abdullah University Of Science And Technology | Hydrophobic photothermal membranes, devices including the hydrophobic photothermal membranes, and methods for solar desalination |
| US20170157570A1 (en) * | 2014-07-17 | 2017-06-08 | The Research Foundation For The State University Of New York | Porous graphene based composite membranes for nanofiltration, desalination, and pervaporation |
| CN110723769A (en) * | 2019-09-27 | 2020-01-24 | 厦门大学 | Continuous seawater desalination device and method |
| CN112760822A (en) * | 2020-12-29 | 2021-05-07 | 武汉纺织大学 | Degradable photothermal conversion film material and preparation method thereof |
| CN113713638A (en) * | 2021-10-14 | 2021-11-30 | 山东海科创新研究院有限公司 | Double-layer high-strength super-hydrophobic separation membrane and preparation method and application thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115198519A (en) * | 2022-07-15 | 2022-10-18 | 武汉纺织大学 | High-efficiency photothermal conversion hydrophilic/hydrophobic fiber felt and preparation method thereof |
| CN115198519B (en) * | 2022-07-15 | 2023-08-08 | 武汉纺织大学 | High-efficiency photo-thermal conversion hydrophilic/hydrophobic fiber mat and preparation method thereof |
| CN116061510A (en) * | 2022-12-07 | 2023-05-05 | 南通大学 | Multilayer self-adjusting composite non-woven material, preparation method and application thereof |
| CN116061510B (en) * | 2022-12-07 | 2023-12-05 | 南通大学 | Multilayer self-adjusting composite non-woven material, preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114477342A (en) | All-weather graphene-based seawater desalination fiber membrane and preparation method thereof | |
| KR101170816B1 (en) | Manufacturing method for polyimide-based carbon nanofiber electrode and carbon nanotube composite electrode and CDI apparatus using the same | |
| CN106809897B (en) | Preparation method of graphene photothermal conversion material for seawater desalination and water purification treatment | |
| Zhao et al. | Electrospinning technique meets solar energy: electrospun nanofiber-based evaporation systems for solar steam generation | |
| CN207016517U (en) | A kind of new type solar energy photo-thermal seawater evaporator | |
| He et al. | One-step fabrication of a stretchable and anti-oil-fouling nanofiber membrane for solar steam generation | |
| CN113860413B (en) | Solar evaporator based on biomass hydrogel/nano carbon material and application thereof | |
| CN113149114B (en) | Solar water evaporation material | |
| CN111040254A (en) | Cellulose-based photothermal conversion gel material and preparation method thereof | |
| CN109053938B (en) | Preparation method of biochar/polymer composite membrane applied to solar water evaporation | |
| Feng et al. | Low-cost and facile hydrophilic amplification of raw corn straws for the applications of highly efficient interfacial solar steam generation | |
| CN113559721A (en) | Preparation method of electrostatic spinning seawater desalination membrane with self-floating structure | |
| CN115198519B (en) | High-efficiency photo-thermal conversion hydrophilic/hydrophobic fiber mat and preparation method thereof | |
| CN112877903A (en) | Oriented water-guiding non-woven material with photo-thermal conversion function and preparation method thereof | |
| CN114619748B (en) | Carbon nano tube based unidirectional moisture-guiding photo-thermal film, preparation method and solar interface evaporation device prepared by same | |
| CN115215402A (en) | Solar photo-thermal evaporation steam collecting device | |
| Li et al. | Catkins based flexible photothermal materials for solar driven interface evaporation collaborative power generation | |
| Li et al. | Aerogel-based solar interface evaporation: Current research progress and future challenges | |
| Wu et al. | A self-floating photothermal evaporator with 3D gradient water channel for highly efficient solar seawater desalination | |
| CN112852147A (en) | High-conversion-efficiency light absorber film, preparation method thereof and seawater desalination device comprising film | |
| CN102285706B (en) | Preparation method for integral polyacrylonitrile carbon fiber electrode for desalination | |
| CN112376121A (en) | Preparation method and application of folded graphene fibers for improving shear orientation of graphene sheets | |
| CN111996666B (en) | Titanium nanosheet/graphene-based fiber membrane and preparation method thereof | |
| Yue et al. | Electrochemically prepared coniferous leaf-like nickel black membrane for desalination by solar-thermal energy conversion | |
| CN112850832B (en) | Functional lotus leaf device, preparation method and application |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220513 |