CN115317932A - Skin-core multi-level hole interface evaporation device driven by solar energy and construction method thereof - Google Patents
Skin-core multi-level hole interface evaporation device driven by solar energy and construction method thereof Download PDFInfo
- Publication number
- CN115317932A CN115317932A CN202210956774.6A CN202210956774A CN115317932A CN 115317932 A CN115317932 A CN 115317932A CN 202210956774 A CN202210956774 A CN 202210956774A CN 115317932 A CN115317932 A CN 115317932A
- Authority
- CN
- China
- Prior art keywords
- precursor
- construction method
- skin
- evaporation device
- core
- 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
- 238000001704 evaporation Methods 0.000 title claims abstract description 86
- 230000008020 evaporation Effects 0.000 title claims abstract description 84
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 239000002243 precursor Substances 0.000 claims abstract description 55
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 30
- 239000004626 polylactic acid Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002904 solvent Substances 0.000 claims abstract description 22
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 18
- 239000007822 coupling agent Substances 0.000 claims abstract description 18
- 238000010146 3D printing Methods 0.000 claims abstract description 17
- 239000011148 porous material Substances 0.000 claims description 24
- 238000005516 engineering process Methods 0.000 claims description 16
- 238000006460 hydrolysis reaction Methods 0.000 claims description 15
- 230000008021 deposition Effects 0.000 claims description 10
- 238000007171 acid catalysis Methods 0.000 claims description 8
- 230000004927 fusion Effects 0.000 claims description 8
- 238000007639 printing Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 4
- 238000006555 catalytic reaction Methods 0.000 abstract description 4
- 238000010612 desalination reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000013535 sea water Substances 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000005903 acid hydrolysis reaction Methods 0.000 abstract 1
- 238000011031 large-scale manufacturing process Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 12
- 238000000151 deposition Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 230000002045 lasting effect Effects 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- 230000007062 hydrolysis Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000002149 hierarchical pore Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0029—Use of radiation
- B01D1/0035—Solar energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/009—Apparatus with independent power supply, e.g. solar cells, windpower, fuel cells
-
- 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
- Y02A20/124—Water desalination
Abstract
The invention belongs to the technical field of new energy, and particularly relates to a skin-core multi-level hole interface evaporation device driven by solar energy and a construction method thereof, wherein the construction method comprises the following steps: polylactic acid, solvent black 7 and a coupling agent KH550 are extruded on a screw extruder to form polylactic acid-based linear composite filaments capable of being subjected to 3D printing, an evaporator precursor model is constructed by means of a computer, the composite linear filaments are printed into an evaporation device precursor with a skin-core structure by a 3D printer, and finally the precursor is completely stood in a sulfuric acid solution, subjected to acid-catalyzed hydrolysis reaction at 20-50 ℃, washed by a large amount of water and naturally dried. The skin-core multi-level hole interface evaporation device is convenient to prepare, good in product regularity and easy for large-scale production; the device has good repeatability of evaporation effect, and can be applied to the fields of pure water acquisition, seawater desalination, wastewater treatment, catalysis and the like.
Description
Technical Field
The invention belongs to the technical field of new energy, and particularly relates to a skin-core multi-level hole interface evaporation device driven by solar energy and a construction method thereof.
Background
New energy technologies are crucial for future development. In recent years, the solar-driven interface evaporation has attracted wide attention due to the advantages of environmental protection, no pollution, convenient and simple operation, high efficiency, stable photo-thermal conversion and the like, and has great application prospects in purified water acquisition, seawater desalination, wastewater treatment, catalytic reaction and the like.
High evaporation rate is a key parameter for interfacial evaporation. Generally, three-dimensional (3D) evaporators tend to have higher evaporation rates than two-dimensional evaporators due to less heat loss. In order to build fast evaporating 3D solar evaporation devices one usually prefers to use natural or artificial porous materials like gels, sponges, plants or their derivatives. Because such evaporators are rich in a large number of interconnected nano/micro pores, rapid water transport is ensured. The evaporation rate can be further enhanced, sometimes by adjusting the water conditions. However, when the above device is used for actual evaporation, there are many disadvantages: 1) The photo-thermal materials are mostly metal, carbon materials and polymers, are difficult to disperse in the main materials, and the heat effect uniformity of the large-area photo-thermal evaporator is poor; 2) For the evaporation of high-concentration brine, salt deposition is easy to occur on the surface of most evaporators, so that solar energy absorption is hindered, and the continuous photothermal effect is poor; 3) The device has high requirements on raw materials and complex preparation process, so that the evaporation rate has poor repeatability; 4) The vapor diffusion is hindered, and evaporation is inhibited, so that the lasting evaporation rate is reduced; the above drawbacks severely limit their applications.
Therefore, the novel construction method of the solar-driven interface evaporation device is explored, the defects are overcome, and the method has important practical significance for developing the application of the solar-driven interface evaporation technology in the aspects of pure water acquisition, seawater desalination, wastewater treatment, catalysis and the like.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a solar-driven skin-core multi-level hole interface evaporation device and a construction method thereof.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a construction method of a skin-core multi-level hole interface evaporation device driven by solar energy comprises the following steps:
1) Polylactic acid, solvent black 7 and a coupling agent KH550 are used as extrusion raw materials, and a polylactic acid-based composite yarn capable of being subjected to 3D printing is extruded from a screw extruder;
2) Establishing an evaporator precursor model through a computer, and printing the composite silk threads obtained in the step 1) into a porous evaporation device precursor with a skin-core structure by means of a 3D printing fusion deposition technology;
3) Completely standing the porous evaporation device precursor obtained in the step 2) in a sulfuric acid solution with the concentration of 1-6 mol/L, and carrying out acid catalysis hydrolysis reaction at 20-50 ℃ to enhance the pore hydrophilicity of the device and ensure that the liquid evaporated object is transmitted from bottom to top in practical application of the solar-driven interface evaporation technology so as to realize the evaporation of the liquid evaporated object at the interface; after hydrolysis reaction for 1-24 h, taking out, washing with a large amount of water, and naturally drying.
In step 1) of the above construction method, the mass ratio of the polylactic acid to the solvent black 7 to the coupling agent KH550 is 1000 to 20 to 50.
Further, in the step 1) of the above construction method, the structural formula of the solvent black 7 is shown in the formula (I):
further, in step 1) of the above construction method, the extrusion temperature of the screw extruder is 170 to 200 ℃.
Further, in step 2) of the construction method described above, the precursor has a rectangular parallelepiped or cylindrical shape.
Further, in step 2) of the construction method described above, the height of the precursor in the axial direction or the longitudinal direction is not more than 4cm.
Further, in step 2) of the construction method described above, the thickness ratio of the "sheath" portion to the "core" portion in the sheath-core structure of the precursor is 1.
Further, in the step 2) of the construction method, the "skin" portion of the precursor includes micron-sized pores, and the pore diameter of the micron-sized pores is 2 to 5 μm.
Further, in the step 2) of the construction method, the "core" portion of the precursor is in a grid shape, and includes vertical millimeter-sized large channels penetrating from top to bottom, and the pore diameter of each channel is 0.2 to 0.4mm.
A skin-core multi-level pore interface evaporation device driven by solar energy is obtained by the construction method.
The invention has the beneficial effects that:
1. by means of the excellent photo-thermal capability of the solvent black 7, the evaporation device has high thermal conversion capability, sufficient thermal evaporation power is guaranteed when the evaporation device is actually applied, and the temperature of the evaporation device can reach 55 ℃ under the condition of 1 standard sunlight intensity. Meanwhile, the unique structure of the solvent black 7 also provides strong interaction with the polylactic acid and good compatibility with the polylactic acid, and the dispersibility of the solvent black in the polylactic acid is also ensured under the assistance of a coupling agent.
2. The device constructed by the invention has a typical hierarchical pore structure, except millimeter-scale macropores on the surface of the core, the micron-scale pores on the surface of the skin are hydrolyzed to enhance the hydrophilicity, which is beneficial to the generation of the capillary action of water from bottom to top, promotes the evaporation of water vapor and improves the evaporation rate, and the evaporation rate of water can be kept at 3.5Kg/m within 1 week under the intensity of 1 standard sunlight 2 H or more.
3. The device core surface vertical macroporous structure constructed by the invention can provide a good channel and is convenient for the reflux of the evaporation concentrated solutionTherefore, when the device is used for evaporating high-concentration brine, salt deposition can be reduced, and the lasting evaporation rate is improved. The device is used in 20% saline water environment, and the lasting evaporation rate can be kept at 3.1Kg/m within 1 week under 1 standard sunlight intensity 2 H or more.
4. The device constructed by the invention mainly comprises the components of the high polymer material polylactic acid, has good mechanical property and can be used for a long time; meanwhile, the construction process is highly controllable, and the devices are regular, so that the repeatability is high, and the method is suitable for large-scale preparation and can be applied to the fields of purified water acquisition, seawater desalination, wastewater treatment, catalysis and the like.
Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an optical schematic view of a typical evaporation device obtained in example 1 of the present invention;
a is the device optical image (inset is upper surface);
b-j are SEM images; b, c: a cross-section of the core; d. e, f: a longitudinal cross-section of the core; g. h: pi Nabi; i. j: pi Waibi;
scales in a-j are 5mm, 0.5mm, 0.2mm, 0.5mm, 0.1mm, 100 μm, 0.5mm, 50 μm, 1mm and 50 μm, respectively;
FIG. 2 is an enlarged view of a in FIG. 1;
FIG. 3 is an enlarged view of b in FIG. 1;
FIG. 4 is an enlarged view of c of FIG. 1;
FIG. 5 is an enlarged view of d in FIG. 1;
FIG. 6 is an enlarged view of e in FIG. 1;
FIG. 7 is an enlarged view of f in FIG. 1;
FIG. 8 is an enlarged view of g in FIG. 1;
FIG. 9 is an enlarged view of h in FIG. 1;
FIG. 10 is an enlarged view of i in FIG. 1;
fig. 11 is an enlarged view of j in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
A construction method of a skin-core multi-level hole interface evaporation device driven by solar energy comprises the following steps:
1) Polylactic acid, solvent black 7 and a coupling agent KH550 are used as extrusion raw materials, and a polylactic acid-based composite yarn capable of being subjected to 3D printing is extruded from a screw extruder; the mass ratio of the polylactic acid to the solvent black 7 to the coupling agent KH550 is 1000; the extrusion temperature of the screw extruder is 170-200 ℃;
2) Establishing an evaporator precursor model through a computer, and printing the composite silk threads obtained in the step 1) into a porous evaporation device precursor with a skin-core structure by means of a 3D printing fusion deposition technology;
3) Completely standing the precursor of the porous evaporation device obtained in the step 2) in a sulfuric acid solution with the concentration of 1-6 mol/L, carrying out acid catalysis hydrolysis reaction at the temperature of 20-50 ℃, taking out the precursor after hydrolysis reaction for 1-24 h, washing the precursor with a large amount of water, and naturally drying the precursor.
In the following examples of the present invention, the screw extruder was a KS-HXY extruder.
The related specific embodiments of the invention are as follows:
example 1
1. And (3) extruding the polylactic acid, the solvent black 7 and the coupling agent KH550 on a screw extruder at 200 ℃ to obtain the polylactic acid-based composite silk thread capable of being subjected to 3D printing for later use. The mass ratio of the polylactic acid to the solvent black to the coupling agent KH550 is 1000.
2. And (3) establishing an evaporator precursor model through a computer, and printing the composite silk threads in the step (1) into a porous evaporation device precursor with a skin-core structure by means of a 3D printing fusion deposition technology. The shape of the precursor is cuboid; the height is 2cm; the skin of the precursor contains micron-sized pores (the aperture: 2-5 mu m), the core is in a grid shape and contains vertical millimeter-sized large pores (the aperture: 0.2-0.4 mm) which are vertically communicated, and the thickness ratio of the skin to the core is 1.
3. Completely standing the precursor of the evaporation device in the step (2) in a sulfuric acid solution with the concentration of 6mol/L, and carrying out acid catalysis hydrolysis reaction at 50 ℃ to enhance the pore hydrophilicity of the device and ensure that the liquid evaporated object is transmitted from bottom to top in practical application of the solar-driven interface evaporation technology so as to realize the evaporation of the liquid evaporated object at the interface. And (3) hydrolyzing for 1h, taking out, washing with a large amount of water, and naturally airing to obtain the solar-driven multi-level hole interface evaporation device.
The constructed solar energy evaporation device can keep the water evaporation rate at 3.7Kg/m within 1 week under 1 standard sunlight intensity 2 H; the device is used in 20% saline water environment, and the lasting evaporation rate can be kept at 3.5Kg/m within 1 week under 1 standard sunlight intensity 2 ·h。
Example 2
1. And (3) extruding the polylactic acid, the solvent black 7 and the coupling agent KH550 on a screw extruder to form the polylactic acid-based composite silk thread capable of being subjected to 3D printing at 170 ℃ for later use. The mass ratio of the polylactic acid to the solvent black to the coupling agent KH550 is 1000.
2. And (3) establishing an evaporator precursor model through a computing mechanism, and printing the composite silk thread in the step (1) into a porous evaporation device precursor with a skin-core structure by means of a 3D printing fusion deposition technology. The shape of the precursor is a cuboid, a cube or a cylinder; the height is not more than 4cm; the skin of the precursor contains micron-sized holes (the aperture: 2-5 mu m), the core is in a grid shape, and the precursor contains vertical millimeter-sized large channels (the aperture: 0.2-0.4 mm) which are communicated up and down, and the skin-core thickness ratio is 1.
3. Completely standing the precursor of the evaporation device in the step (2) in a sulfuric acid solution with the concentration of 1mol/L, and carrying out acid catalysis hydrolysis reaction at 20 ℃ to enhance the pore hydrophilicity of the device and ensure that the liquid evaporated object is transmitted from bottom to top in practical application of the solar-driven interface evaporation technology so as to realize the evaporation of the liquid evaporated object at the interface. And (3) after 24h of hydrolysis, taking out, washing with a large amount of water, and naturally drying to obtain the solar-driven multi-level hole interface evaporation device.
The constructed solar energy evaporation device can keep 3.5Kg/m within 1 week of water evaporation rate under 1 standard sunlight intensity 2 H; the device is used in 20% saline water environment, and the lasting evaporation rate can be kept at 3.1Kg/m within 1 week under 1 standard sunlight intensity 2 ·h。
Example 3
1. And (3) extruding the polylactic acid, the solvent black 7 and the coupling agent KH550 on a screw extruder at 180 ℃ to obtain the polylactic acid-based composite silk thread capable of being subjected to 3D printing for later use. The mass ratio of the polylactic acid to the solvent black to the coupling agent KH550 is 1000.
2. And (3) establishing an evaporator precursor model through a computing mechanism, and printing the composite silk thread in the step (1) into a porous evaporation device precursor with a skin-core structure by means of a 3D printing fusion deposition technology. The shape of the precursor is cuboid; the height is 4cm; the skin of the precursor contains micron-sized holes (the aperture: 2-5 mu m), the core is in a grid shape, and the precursor contains vertical millimeter-sized large channels (the aperture: 0.2-0.4 mm) which are communicated up and down, and the skin-core thickness ratio is 1.
3. Completely standing the precursor of the evaporation device in the step (2) in a sulfuric acid solution with the concentration of 3mol/L, and carrying out acid catalysis hydrolysis reaction at 40 ℃ to enhance the pore hydrophilicity of the device and ensure that the liquid evaporated object is transmitted from bottom to top in practical application of the solar-driven interface evaporation technology so as to realize the evaporation of the liquid evaporated object at the interface. And (3) after 15h of hydrolysis, taking out, washing with a large amount of water, and naturally drying to obtain the solar-driven multi-level hole interface evaporation device.
The constructed solar energy evaporation device can keep 3.6Kg/m within 1 week of water evaporation rate under 1 standard sunlight intensity 2 H; the device is used in 20% saline water environment, and the lasting evaporation rate within 1 week can be maintained under 1 standard sunlight intensityHeld at 3.1Kg/m 2 ·h。
Example 4
1. And (3) extruding the polylactic acid, the solvent black 7 and the coupling agent KH550 on a screw extruder at 200 ℃ to obtain the polylactic acid-based composite silk thread capable of being subjected to 3D printing for later use. The mass ratio of the polylactic acid to the solvent black to the coupling agent KH550 is 1000.
2. And (3) establishing an evaporator precursor model through a computer, and printing the composite silk threads in the step (1) into a porous evaporation device precursor with a skin-core structure by means of a 3D printing fusion deposition technology. The shape of the precursor is cuboid; the height is 3cm; the skin of the precursor contains micron-sized pores (the aperture: 2-5 mu m), the core is in a grid shape and contains vertical millimeter-sized large pores (the aperture: 0.2-0.4 mm) which are vertically communicated, and the thickness ratio of the skin to the core is 1.
3. Completely standing the precursor of the evaporation device in the step (2) in a sulfuric acid solution with the concentration of 4.5mol/L, and carrying out acid catalysis hydrolysis reaction at 30 ℃ to enhance the hydrophilicity of the pore channel of the device and ensure that the liquid evaporated object is transmitted from bottom to top in practical application of the solar-driven interface evaporation technology so as to realize the evaporation of the liquid evaporated object at the interface. And (3) after hydrolysis for 16h, taking out, washing with a large amount of water, and naturally drying to obtain the solar-driven multi-level hole interface evaporation device.
The constructed solar energy evaporation device can keep 3.6Kg/m within 1 week of water evaporation rate under 1 standard sunlight intensity 2 H; the device is used in 20% saline water environment, and the lasting evaporation rate can be kept at 3.2Kg/m within 1 week under 1 standard sunlight intensity 2 ·h。
Example 5
1. And (3) extruding the polylactic acid, the solvent black 7 and the coupling agent KH550 on a screw extruder at 200 ℃ to obtain the polylactic acid-based composite silk thread capable of being subjected to 3D printing for later use. The mass ratio of the polylactic acid to the solvent black to the coupling agent KH550 is 1000.
2. And (3) establishing an evaporator precursor model through a computing mechanism, and printing the composite silk thread in the step (1) into a porous evaporation device precursor with a skin-core structure by means of a 3D printing fusion deposition technology. The precursor is in a cuboid shape; the height is 2cm; the skin of the precursor contains micron-sized pores (the aperture: 2-5 mu m), the core is in a grid shape and contains vertical millimeter-sized large pores (the aperture: 0.2-0.4 mm) which are vertically communicated, and the thickness ratio of the skin to the core is 1.
3. Completely standing the precursor of the evaporation device in the step (2) in a sulfuric acid solution with the concentration of 5mol/L, and carrying out acid catalysis hydrolysis reaction at 40 ℃ to enhance the pore hydrophilicity of the device and ensure that the liquid evaporated object is transmitted from bottom to top in practical application of the solar-driven interface evaporation technology so as to realize the evaporation of the liquid evaporated object at the interface. And (3) after hydrolysis for 10h, taking out, washing with a large amount of water, and naturally drying to obtain the solar-driven multi-level hole interface evaporation device.
The constructed solar energy evaporation device can keep the water evaporation rate at 3.7Kg/m within 1 week under 1 standard sunlight intensity 2 H; the device is used in 20% saline water environment, and the lasting evaporation rate can be kept at 3.3Kg/m within 1 week under 1 standard sunlight intensity 2 ·h。
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A construction method of a skin-core multi-level hole interface evaporation device driven by solar energy is characterized by comprising the following steps:
1) Polylactic acid, solvent black 7 and a coupling agent KH550 are used as extrusion raw materials, and are extruded into polylactic acid-based composite threads capable of being subjected to 3D printing on a screw extruder;
2) Establishing an evaporator precursor model through a computer, and printing the composite silk threads obtained in the step 1) into a porous evaporation device precursor with a skin-core structure by means of a 3D printing fusion deposition technology;
3) Completely standing the precursor of the porous evaporation device obtained in the step 2) in a sulfuric acid solution with the concentration of 1-6 mol/L, carrying out acid catalysis hydrolysis reaction at the temperature of 20-50 ℃, taking out the precursor after hydrolysis reaction for 1-24 h, washing the precursor by using a large amount of water, and naturally drying the precursor.
2. The construction method according to claim 1, wherein: in the step 1), the mass ratio of the polylactic acid to the solvent black 7 to the coupling agent KH550 is 1000-20-50.
3. The construction method according to claim 1, wherein: in the step 1), the structural formula of the solvent black 7 is shown as the formula (I):
4. the construction method according to claim 1, wherein: in the step 1), the extrusion temperature of the screw extruder is 170-200 ℃.
5. The construction method according to claim 1, wherein: in the step 2), the precursor is in a cuboid or cylinder shape.
6. The construction method according to claim 5, wherein: in the step 2), the height of the precursor along the axis direction or the length direction is less than or equal to 4cm.
7. The construction method according to claim 1, wherein: in the step 2), the thickness ratio of a skin part to a core part in the skin-core structure of the precursor is 1.
8. The construction method according to claim 1, wherein: in the step 2), the 'skin' part of the precursor contains micron-sized holes, and the aperture of the micron-sized holes is 2-5 microns.
9. The construction method according to claim 1, wherein: in the step 2), the core part of the precursor is in a grid shape and comprises an up-and-down through type vertical millimeter-grade large pore passage, and the pore diameter of the pore passage is 0.2-0.4 mm.
10. A solar-powered skin-core multi-level pore interface evaporation device constructed by the construction method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210956774.6A CN115317932B (en) | 2022-08-10 | 2022-08-10 | Solar-driven skin-core multi-level hole interface evaporation device and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210956774.6A CN115317932B (en) | 2022-08-10 | 2022-08-10 | Solar-driven skin-core multi-level hole interface evaporation device and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115317932A true CN115317932A (en) | 2022-11-11 |
| CN115317932B CN115317932B (en) | 2024-03-01 |
Family
ID=83920974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210956774.6A Active CN115317932B (en) | 2022-08-10 | 2022-08-10 | Solar-driven skin-core multi-level hole interface evaporation device and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115317932B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130112464A (en) * | 2012-04-04 | 2013-10-14 | 현대자동차주식회사 | Sheath-core all-in-one poly lactic acid fiber and a fabrication process thereof |
| US20220082302A1 (en) * | 2020-09-15 | 2022-03-17 | City University Of Hong Kong | Boron carbide bilayer foam solar evaporator and method for preparing thereof |
| CN114195214A (en) * | 2021-12-02 | 2022-03-18 | 中北大学 | Method for constructing solar evaporator by using graphene oxide |
-
2022
- 2022-08-10 CN CN202210956774.6A patent/CN115317932B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130112464A (en) * | 2012-04-04 | 2013-10-14 | 현대자동차주식회사 | Sheath-core all-in-one poly lactic acid fiber and a fabrication process thereof |
| US20220082302A1 (en) * | 2020-09-15 | 2022-03-17 | City University Of Hong Kong | Boron carbide bilayer foam solar evaporator and method for preparing thereof |
| CN114195214A (en) * | 2021-12-02 | 2022-03-18 | 中北大学 | Method for constructing solar evaporator by using graphene oxide |
Non-Patent Citations (1)
| Title |
|---|
| QIN DING 等: "Solar-driven interfacial evaporation based on double-layer polylactic acid fibrous membranes loading Chinese ink nanoparticles", vol. 195, pages 636 - 643, XP086035652, DOI: 10.1016/j.solener.2019.11.078 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115317932B (en) | 2024-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wu et al. | Solar-driven evaporators for water treatment: challenges and opportunities | |
| CN105696197B (en) | A kind of c-type core-shell nano tunica fibrosa and its eccentric shaft electrostatic spinning preparation method | |
| CN110105917B (en) | Photo-thermal composite material and preparation method and application thereof | |
| CN111040254A (en) | Cellulose-based photothermal conversion gel material and preparation method thereof | |
| CN109735963B (en) | Preparation method and application of carbon nitride nanofiber | |
| CN105155032A (en) | Composite fiber containing capsules and preparation method thereof | |
| CN115490285B (en) | Chocolate bar-shaped composite solar evaporator and preparation method and application thereof | |
| CN112760822A (en) | Degradable photothermal conversion film material and preparation method thereof | |
| CN113559721A (en) | Preparation method of electrostatic spinning seawater desalination membrane with self-floating structure | |
| CN114405421B (en) | Cellulose nanofiber aerogel photothermal interface water evaporation material and preparation method thereof | |
| CN111392794A (en) | Self-cleaning light absorption medium for photo-thermal seawater desalination and preparation method thereof | |
| CN112108084A (en) | Preparation method of hydrogel with hierarchical pore structure for accelerating solar water evaporation | |
| CN114619748B (en) | Carbon nano tube based unidirectional moisture-guiding photo-thermal film, preparation method and solar interface evaporation device prepared by same | |
| CN111204829B (en) | Solar sewage purification aerogel based on waste paper and graphite and preparation method thereof | |
| CN115317932A (en) | Skin-core multi-level hole interface evaporation device driven by solar energy and construction method thereof | |
| Sun et al. | Solar-driven interfacial evaporation for sustainable desalination: Evaluation of current salt-resistant strategies | |
| CN113699693B (en) | Super-hydrophobic and anti-adhesion nanofiber membrane as well as preparation method and application thereof | |
| CN104894691B (en) | A kind of method of electrostatic spinning is prepared Fe2O3/V2O5The method of composite fibre | |
| CN108636340A (en) | A kind of preparation method of mesoporous magnesia fiber and its application in purification of heavy metal waste water | |
| Tang et al. | A review: Electrospinning applied to solar interfacial evaporator | |
| CN116005172A (en) | Method and device for continuously and fully electrolyzing seawater by photo-thermal and electro-catalytic double-functional composite nano carbon film | |
| CN113233532B (en) | Low-cost photo-thermal material based on solar interface evaporation and preparation method thereof | |
| CN115716967B (en) | Carbon aerogel for interfacial evaporation and absorbing heat from environment and preparation method thereof | |
| CN116216824B (en) | Hydrogel type interface photo-thermal evaporator and preparation and application methods thereof | |
| CN111204734A (en) | Flaky biomass carbon material and preparation method thereof |
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 |