CN113818521A - 3D printing bionic hydrophilic PVA hydrogel beetle back device for water collection and printing method thereof - Google Patents
3D printing bionic hydrophilic PVA hydrogel beetle back device for water collection and printing method thereof Download PDFInfo
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- CN113818521A CN113818521A CN202110978993.XA CN202110978993A CN113818521A CN 113818521 A CN113818521 A CN 113818521A CN 202110978993 A CN202110978993 A CN 202110978993A CN 113818521 A CN113818521 A CN 113818521A
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/28—Methods or installations for obtaining or collecting drinking water or tap water from humid air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/075—Macromolecular gels
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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Abstract
The invention relates to the technical field of bionics, in particular to a 3D printing bionic hydrophilic PVA hydrogel beetle back device for water collection and a printing method thereof. Firstly, preparing a beetle back template with a convex surface by using a photocuring three-dimensional forming technology, and then preparing the bionic beetle back of the hydrophilic PVA hydrogel by copying the surface morphology of the beetle back template. The unique arch-shaped convex structure of the beetle back plays a role of integrating curvature in the process of collecting and transporting fog water, and the Laplacian pressure induced by the surface gradient of the triangular structure endows the beetle back surface with an effective water collecting and transporting system. The introduction of the 3D printing technology can realize rapid manufacturing and large-scale production, and plays an important role in relieving the problem of water shortage in desert areas.
Description
Technical Field
The invention relates to a water collecting device, in particular to a 3D printing bionic hydrophilic PVA hydrogel beetle back device for water collection and a printing method thereof.
Background
At present, the western fresh water resources in China are in short supply, the rainfall is less, and the mist in the form of small liquid drops becomes better fresh water resources, so a device and a method for collecting the mist are needed.
Beetles in deserts often stand straight on the back and face air flow, water drops can be condensed quickly on the back, and researches of scholars find that a plurality of fine conical bulges are arranged on the back of the beetles, the fine structures are favorable for gathering of small water drops in fog, and the beetles are upright, so that the gathered water drops can be quickly transported and gathered under the influence of gravity. But the sizes of the bulges on the backs of the beetles are different and the bulges are distributed in a complex way, so that the optimal fog collecting effect cannot be achieved; the back of the beetle is not hydrophilic and has no water transportation channel, so that the gathering and transmission of water drops are limited, and the water gathering efficiency is greatly influenced.
Disclosure of Invention
The invention aims to solve the defects and provides a 3D printing bionic hydrophilic PVA hydrogel beetle back device for water collection and a printing method thereof.
In order to overcome the defects in the background art, the technical scheme adopted by the invention for solving the technical problems is as follows: this kind of a 3D prints bionical hydrophilic PVA aquogel beetle back of body device for water is including wholly being hemispherical bionical beetle back of body, and collection device's bottom surface diameter is 40mm, be equipped with bellied triangle ridge on the bionical beetle back of body, triangle ridge is regular spread, every triangle ridge interval 2mm, and triangle ridge is equipped with 19, the protruding angle of triangle ridge is 60, and the grow of triangle is 1.8 mm.
A3D prints bionical hydrophilic PVA aquogel beetle back of body device for water is collected, the method step is as follows:
the method comprises the following steps of firstly, preparing a beetle back template with a convex surface by a photocuring three-dimensional forming technology, namely, performing 3D printing of an envisionTec P4 LED Mini, designing a 3D model of the beetle back template with a triangular convex surface form by using solidworks software, converting the 3D model into an STL format, introducing the STL format into a 3D printer for data secondary processing, setting the intensity of an LED light source, XY pixel resolution and exposure time, and finally performing curing forming by a medium-pressure mercury lamp;
secondly, preparing a hydrophilic PVA hydrogel beetle back for copying the convex form of the surface of the beetle back template: mixing and stirring dimethyl sulfoxide, deionized water and PVA particles to prepare PVA hydrogel, pouring the PVA hydrogel into the beetle back template which is printed in the first step in a 3D mode and contains the raised surface morphology, and putting the beetle back template into a refrigerator for freezing and forming to finish the preparation of the hydrophilic PVA hydrogel beetle back.
According to another embodiment of the invention, the LED light source in the first step is 410nm LED light source, the intensity is 18mW/cm2, the XY pixel resolution is 30 microns, the exposure time is 3 seconds per layer, and the intensity of the medium-pressure mercury lamp is 40mW/cm 2.
According to another embodiment of the invention, the mass ratio of dimethyl sulfoxide to deionized water to PVA particles in the second step is 27:9: 4.
According to another embodiment of the invention, the mixing and stirring in the second step is magnetic stirring water bath stirring, the water temperature of the magnetic stirring water bath is 90 ℃, the magnetic stirring speed is 400rpm, and the stirring time is 4 hours.
According to another embodiment of the present invention, it further comprises setting the temperature in the refrigerator to-20 ℃ in the second step, and the freezing time to 10 hours.
The invention has the beneficial effects that: the beetle back template with the triangular convex shape is prepared by adopting a 3D printing technology, so that the shape of the beetle back is more regular, the beetle back template can be accurate to a millimeter level, large-scale production can be realized, and the produced collecting device is more controllable in small shape due to the advantages of 3D printing, and the water collection efficiency is improved to the maximum extent;
the beetle back surface adopts the independently designed triangular ridge beam bulge, the unique arch structure of the beetle back surface plays a role of integrating curvature in the fog water collecting and transporting process, and the Laplacian pressure induced by the surface gradient of the triangular structure endows the beetle back surface with an effective water collecting and transmitting system;
Adopt the bionical beetle back of the body of duplicating beetle back of the body template surface form preparation hydrophilic PVA aquogel, promote the hydrophilic performance on the beetle back of the body greatly, compare in the tradition carry out hydrophilic modification to the beetle back of the body, it is that the weatherability of hydrophilic material will be stronger itself, is favorable to the collection and the transmission of dribble more to collection device's usable time can be longer.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a back view of a triangular ridge beam raised hydrophilic PVA hydrogel beetle;
FIG. 2 is a drawing of a 3D printed beetle back template with raised surface features;
FIG. 3 is a back view of a beetle, a hydrophilic PVA hydrogel, protruding from rectangular ridges in comparative example 1;
FIG. 4 is a graph of mist water collection quality for the samples of example 1 and comparative example 1 at the same mist flow field;
FIG. 5 is a back view of a resin beetle raised on a 3D-printed triangular ridge beam in comparative example 2;
fig. 6 is a graph of the mist water collection quality for the samples of example 1 and comparative example 2 at the same mist flow field.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
As shown in fig. 1, collection device is including wholly being hemispherical bionical beetle back, and collection device's bottom surface diameter is 40mm, be equipped with bellied triangle ridge beam on the bionical beetle back, triangle ridge beam is regular spread, every triangle ridge beam interval 2mm, and triangle ridge beam is equipped with 19, the protruding angle of triangle ridge beam is 60, and the grow of triangle is 1.8 mm.
The 3D printing method of the bionic hydrophilic PVA hydrogel beetle back 3D printing device comprises the following steps:
firstly, preparing a beetle back template with a convex surface by using a photocuring three-dimensional forming technology, namely performing 3D printing by using an envisionTec P4 LED Mini, designing a 3D model of the beetle back template with a triangular convex surface form by using solidworks software, converting the 3D model into an STL format, introducing the STL format into a 3D printer for data secondary treatment, setting the intensity of an LED light source, XY pixel resolution and exposure time, and finally performing curing forming by using a medium-pressure mercury lamp, wherein the step is shown in figure 2;
step two, preparing a hydrophilic PVA hydrogel beetle back for copying the convex form of the surface of the beetle back template: mixing and stirring dimethyl sulfoxide, deionized water and PVA particles to prepare PVA hydrogel, pouring the PVA hydrogel into the beetle back template which is printed in the first step in a 3D mode and contains the raised surface morphology, putting the beetle back template into a refrigerator for freezing and forming, and finishing the preparation of the hydrophilic PVA hydrogel beetle back, which is shown in figure 1.
In the first step, the LED light source is 410nm, the intensity is 18mW/cm2, the XY pixel resolution is 30 microns, the exposure time is 3 seconds per layer, and the intensity of the medium-pressure mercury lamp is 40mW/cm 2.
Wherein the mass ratio of dimethyl sulfoxide, deionized water and PVA particles in the second step is 27:9: 4.
Wherein the mixing and stirring in the second step is magnetic stirring water bath stirring, the water temperature of the magnetic stirring water bath is 90 ℃, the magnetic stirring speed is 400rpm, and the stirring time is 4 hours.
Wherein the temperature in the refrigerator in the second step is set to-20 ℃ and the freezing time is 10 hours.
Example 1
The collecting device firstly adopts a 3D printing technology to print out the beetle back template with the surface convex morphology, and then prepares the bionic beetle back of the hydrophilic PVA hydrogel by copying the surface morphology of the beetle back template. The triangle ridge beam arch on the beetle back is regular arrangement, and the triangle point collects the water droplet in the fog, forms the transport corridor who collects water between two adjacent ridge beam archs, specifically includes following steps:
step one, photocuring 3D printing: the 3D printer is an envisionTec P4 LED Mini, a 3D model of a beetle back template with a triangular convex surface form is designed by using solidworks software, the beetle back template is converted into an STL format and is introduced into a 3D printer for secondary data processing, a 410nm LED light source is used, the intensity is 18mW/cm2, the XY pixel resolution is 30 microns, the exposure time is 3 seconds, and finally, the beetle back template is cured and molded by a medium-pressure mercury lamp, and the intensity is 40mW/cm 2;
Step two, preparing hydrophilic PVA hydrogel: mixing dimethyl sulfoxide, deionized water and PVA particles according to a mass ratio of 27:9:4, standing and swelling for 30min, stirring for 4h in a water bath kettle with the water temperature of 90 ℃, wherein the stirring speed is 400rpm, and preparing PVA hydrogel;
freezing and forming the back of the hydrophilic PVA hydrogel beetle: pouring the prepared PVA hydrogel into the beetle back template which is printed in the 3D mode in the first step and contains the raised surface morphology, placing the beetle back template into a refrigerator with the temperature of 20 ℃ below zero for freezing for 10 hours for forming, finally peeling the PVA hydrogel beetle back from the template to complete the preparation of the hydrophilic PVA hydrogel beetle back, and referring to the water collection device in figure 1.
Comparative example 1
Step one, photocuring 3D printing: the 3D printer is an envisionTec P4 LED Mini, a 3D model of a beetle back template with a rectangular convex surface form is designed by using solidworks software, the beetle back template is converted into an STL format and is introduced into a 3D printer for secondary data processing, an LED light source with the wavelength of 410nm is used, the intensity is 18mW/cm2, the XY pixel resolution is 30 microns, the exposure time is 3 seconds, and finally, the beetle back template is cured and molded by a medium-pressure mercury lamp, and the intensity is 40mW/cm 2;
step two, preparing hydrophilic PVA hydrogel: mixing dimethyl sulfoxide, deionized water and PVA particles according to a mass ratio of 27:9:4, standing and swelling for 30min, stirring for 4h in a water bath kettle with the water temperature of 90 ℃, wherein the stirring speed is 400rpm, and preparing PVA hydrogel;
Freezing and forming the back of the hydrophilic PVA hydrogel beetle: pouring the prepared PVA hydrogel into the beetle back template which is printed in the 3D mode in the first step and contains the raised surface morphology, placing the beetle back template into a refrigerator with the temperature of 20 ℃ below zero for freezing for 10 hours for forming, finally peeling the PVA hydrogel beetle back from the template to finish the preparation of the hydrophilic PVA hydrogel beetle back, and finishing the water collection device, and referring to fig. 3.
As can be seen from fig. 4, compared with example 1, in comparative example 1, the shape of the protrusion on the beetle back is a rectangle, and the water collection amount in the same time is reduced by half, which means that the 60 ° angle of the triangular protrusion tip is smaller than the 90 ° angle of the rectangle, so that when the beetle back collects mist, a larger laplacian pressure difference is generated, which is more beneficial to collecting the small water droplets, and the water collection effect is greatly improved.
Comparative example 2
Step one, photocuring 3D printing: the 3D printer is an envisionTec P4 LED Mini, a 3D model of the beetle back with the triangular convex surface morphology is designed by using solidworks software, the beetle back is converted into an STL format and is LED into a 3D printer for secondary data processing, an LED light source with the wavelength of 410nm is used, the intensity is 18mW/cm2, the XY pixel resolution is 30 microns, the exposure time is 3 seconds, and finally, the beetle back is cured and molded by a medium-pressure mercury lamp, and the intensity is 40mW/cm 2;
And secondly, soaking the beetle back with the 3D-printed triangular protrusion surface form in an absolute ethyl alcohol solution, standing for five minutes, and removing uncured resin.
The completed water collecting device is shown in fig. 5.
As can be seen from fig. 6, in comparative example 2, the amount of water collected was 7 times less than that of the hydrogel beetle back using the resin beetle back with the triangular ridge beam projections printed in direct 3D, compared to example 1. The hydrophilic characteristic of the hydrogel surface is shown to enable the small water drops to be rapidly gathered on the back surface of the beetle, and when the beetle is transported, the hydrophilic surface forms a water film, so that the friction force is greatly reduced, the transportation of water is faster, and the water collection amount is greatly improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The utility model provides a 3D prints bionical hydrophilic PVA aquogel beetle back of body device for water is collected, a serial communication port, collection device is including wholly being hemispherical bionical beetle back of body, and collection device's bottom surface diameter is 40mm, be equipped with bellied triangle ridge beam on the bionical beetle back of body, triangle ridge beam is regular spread, every triangle ridge beam interval 2mm, and triangle ridge beam is equipped with 19, the protruding angle of triangle ridge beam is 60, and the grow of triangle is 1.8 mm.
2. A method of printing in an apparatus as claimed in claim 1, characterized in that the method steps are as follows:
the method comprises the following steps of firstly, preparing a beetle back template with a convex surface by a photocuring three-dimensional forming technology, namely, performing 3D printing of an envisionTec P4 LED Mini, designing a 3D model of the beetle back template with a triangular convex surface form by using solidworks software, converting the 3D model into an STL format, introducing the STL format into a 3D printer for data secondary processing, setting the intensity of an LED light source, XY pixel resolution and exposure time, and finally performing curing forming by a medium-pressure mercury lamp;
secondly, preparing a hydrophilic PVA hydrogel beetle back for copying the convex form of the surface of the beetle back template: mixing and stirring dimethyl sulfoxide, deionized water and PVA particles to prepare PVA hydrogel, pouring the PVA hydrogel into the beetle back template which is printed in the first step in a 3D mode and contains the raised surface morphology, and putting the beetle back template into a refrigerator for freezing and forming to finish the preparation of the hydrophilic PVA hydrogel beetle back.
3. A printing method of an apparatus according to claim 2, characterized by: in the first step, the LED light source adopts a 410nm LED light source, and the intensity is 18mW/cm2XY pixel resolution of 30 μm, exposure time of 3 s per layer, and medium-pressure mercury lamp intensity of 40mW/cm 2。
4. A printing method of an apparatus according to claim 2, characterized by: in the second step, the mass ratio of dimethyl sulfoxide to deionized water to PVA particles is 27:9: 4.
5. A printing method of an apparatus according to claim 2, characterized by: and in the second step, the mixing and stirring are performed in a magnetic stirring water bath kettle, the water temperature of the magnetic stirring water bath is 90 ℃, the magnetic stirring speed is 400rpm, and the stirring time is 4 hours.
6. A printing method of an apparatus according to claim 2, characterized by: in the second step, the temperature in the refrigerator is set to be-20 ℃, and the freezing time is 10 hours.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114934562A (en) * | 2022-07-01 | 2022-08-23 | 西安交通大学 | Method for purifying, collecting and transporting water mist capable of being controlled in programmed mode |
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| CN103205994A (en) * | 2013-03-13 | 2013-07-17 | 武汉大学 | Moisture capture device |
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| CN103205994A (en) * | 2013-03-13 | 2013-07-17 | 武汉大学 | Moisture capture device |
| CN111391309A (en) * | 2020-03-25 | 2020-07-10 | 常州大学 | Method and device for constructing super-hydrophobic bionic spider silk moisture collecting device by 3D printing technology |
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| CN114934562A (en) * | 2022-07-01 | 2022-08-23 | 西安交通大学 | Method for purifying, collecting and transporting water mist capable of being controlled in programmed mode |
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