CN114639937A - Ultrathin breathable flexible butterfly antenna with stretching and temperature sensing functions and preparation method thereof - Google Patents
Ultrathin breathable flexible butterfly antenna with stretching and temperature sensing functions and preparation method thereof Download PDFInfo
- Publication number
- CN114639937A CN114639937A CN202210240911.6A CN202210240911A CN114639937A CN 114639937 A CN114639937 A CN 114639937A CN 202210240911 A CN202210240911 A CN 202210240911A CN 114639937 A CN114639937 A CN 114639937A
- Authority
- CN
- China
- Prior art keywords
- flexible
- butterfly
- film
- antenna
- breathable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/085—Flexible aerials; Whip aerials with a resilient base
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/04—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0026—Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/273—Adaptation for carrying or wearing by persons or animals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Details Of Aerials (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses an ultrathin breathable flexible butterfly antenna with stretching and temperature sensing functions and a preparation method thereof.A conductive polymer A obtained from a carbon nanotube solution is spin-coated on a PI film and dried and solidified to obtain a flexible conductive film; the flexible conductive film is cut by laser to obtain a flexible butterfly antenna conductor layer; attaching the flexible butterfly-shaped antenna conductor layer to the porous thermoplastic polyurethane film fiber film for hot pressing to obtain a butterfly-shaped antenna conductor layer transferred on the porous polyurethane breathable fiber film; covering a layer of porous thermoplastic polyurethane fiber film on the surface layer of the butterfly-shaped structure, and carrying out secondary hot pressing to obtain the breathable flexible butterfly-shaped antenna. The invention realizes the crossing of the conductive path from nanometer to micrometer, and ensures the conductive continuity of the conductor under the millimeter scale and the stable bonding of the antenna conductor and the breathable medium. The prepared antenna has a sensing function, can realize sensing of tensile strain and temperature, and is suitable for wearable electronic equipment and skin integrated flexible electronics.
Description
Technical Field
The invention belongs to the field of flexible electronics and microwave radio frequency devices, and particularly relates to an ultrathin flexible breathable butterfly antenna with tensile strain and temperature sensing functions.
Background
With the rapid development of the fields of artificial intelligence, human-computer interaction, health monitoring and the like, the flexible electronic technology becomes an important technical means in the application scenes, and the antenna serving as a wireless terminal of the flexible electronic is a key component on the whole electronic equipment and plays an important role in signal transmission, power supply, even sensing and the like. Flexible antennas with flexibility and stretch have been widely studied at present, especially for health monitoring, but two fatal drawbacks of such antennas are prevalent in order to meet the actual human body wearing requirements: (1) the antenna conductor structures are encapsulated in elastic silica gel or organic elastic resin to ensure high extensibility of the antenna conductor structures, but the dense molecular chain structures in the antenna conductor structures form poor air permeability, so that discomfort of a human body can be caused in the process of wearing the antenna conductor structures compactly for a long time, and even serious skin inflammation can be caused; (2) because flexible device needs to closely laminate with skin, the skin has the chemical environment that steam, sweat volatilize and leads to traditional antenna metallic conductor to be easily oxidized to traditional copper metallic conductor ductility is relatively poor, leads to the antenna to be difficult to laminate. In addition, for a common breathable fabric antenna, because of the ripple structure of the fabric period, it is difficult for metal to be tightly attached to the fabric substrate, and complicated processes and expensive equipment are required to ensure the processing of the fabric antenna, so that the woven antenna is difficult to meet the requirement of high-performance wearable antennas for human bodies.
In summary, in order to solve the problems of the conventional antenna that the air permeability is poor and the flexible conductor is easy to be oxidized, it is necessary to develop a flexible antenna which has high air permeability and can resist the erosion of the chemical environment of the human body by combining an ultrathin air permeable dielectric layer and a customized structure of a flexible nonmetal conductive material, so that the flexible antenna can be worn for a long time under the condition of not interfering the normal activities of the human body, and a new way is provided for the next generation of skin electronics.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an ultrathin breathable flexible butterfly antenna with tensile strain and temperature sensing functions and a preparation method thereof. The prepared flexible breathable antenna has a certain sensing function, can realize tensile strain and temperature sensing within a certain range, and is suitable for wearable electronic equipment and skin integrated flexible electronics.
The invention is realized by the following technical scheme.
In one aspect of the invention, a preparation method of an ultrathin breathable flexible butterfly antenna with stretching and temperature sensing functions is provided, and the preparation method comprises the following steps:
s1, preparing a flexible conductor:
according to the mass ratio (5-10): (2-5) adding micron hollow silver balls into the carbon nano tube solution to obtain a mixed solution, wherein the mass ratio of the micron hollow silver balls to the carbon nano tube solution is 1: (0.6-1) mixing the mixed solution with a polyvinyl alcohol aqueous solution, carrying out centrifugal stirring and vacuum filtration to obtain a conductive polymer A; spin-coating a conductive polymer A on a PI film, drying and curing to obtain a flexible conductive film;
s2, cutting the butterfly structure:
adsorbing the flexible conductive film prepared in the step S1 on a butterfly-shaped glass carrier plate through vacuum, performing circular cutting by adjusting the power and cutting speed of ultraviolet light, ablating the flexible conductive film on the glass carrier plate through laser, and peeling off the residual conductive film to obtain a flexible butterfly-shaped antenna conductor layer with the surface covered with a PI conductor support substrate;
s3, antenna conductor transfer:
attaching the flexible butterfly antenna conductor layer coated with the PI conductor support matrix to a porous thermoplastic polyurethane film fiber film, and placing the porous thermoplastic polyurethane film fiber film under a hot press for hot pressing to obtain a PI flexible butterfly antenna conductor layer coated on the porous polyurethane breathable fiber film by transfer printing;
s4, antenna packaging:
and washing the transferred antenna conductor by using deionized water, drying at low temperature, covering a layer of porous thermoplastic polyurethane fiber film on the surface layer of the obtained butterfly-shaped structure, and performing secondary hot pressing to obtain the breathable flexible butterfly-shaped antenna.
Preferably, the mass fraction of the carbon nanotube solution is 5 mg/mL.
Preferably, the mass concentration of the polyvinyl alcohol aqueous solution is 5-15%.
Preferably, the centrifugal stirring is carried out for 0.5-1.5 h, and the vacuum filtration is carried out for 30-60 min.
Preferably, spin-coating at a rotation speed of 500-1000 r/min for 10-30 s; and (3) placing the spin-coated conductive polymer A film on a 600-900 ℃ baking table for heating for 0.5-2 h.
Preferably, the butterfly structure is cut, a designed butterfly structure digital file is guided into a nanosecond laser, the prepared flexible composite film is adsorbed on a laser etching platform through vacuum, a glass slide with the flexible conductive film fixed is placed under an ultraviolet laser, a pre-designed structure outline is input, and circular cutting is carried out by adjusting the power and the cutting speed of ultraviolet light.
Preferably, the power of the ultraviolet light is 3-5W, and the cutting speed is 100-600 mm/min, so that 1-5 times of circular cutting are carried out.
Preferably, the complete conductor layer covered with the PI flexible butterfly antenna is prepared by de-sticking the glue surface of the water-soluble adhesive tape and is transferred onto the hydrosol tape.
Preferably, the hot press is used for hot pressing for 5-15 s under the conditions of 100-120 kPa force and 100-120 ℃; and carrying out hot pressing for 5-15 s under the conditions of 60-90 kPa force and 100-120 ℃.
In another aspect of the invention, the ultrathin breathable flexible butterfly antenna with stretching and temperature strain prepared by the method is provided.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the ultrathin flexible breathable butterfly antenna, the flexible composite conductive film is prepared through mixed doping, the butterfly structure of the antenna is cut by using nano laser, the butterfly structure is transferred onto the breathable film in a binding-free manner, and the flexible antenna is integrally packaged by using a hot pressing method. The composite conductive film is prepared by doping the carbon nano tube and the micro silver ball, so that the crossing of a conductive path from a nanometer scale to a micrometer scale is facilitated, and the conductive continuity of a conductor under a millimeter scale can be ensured; in addition, the production cost can be greatly reduced by using the porous polyurethane fiber film with low cost, and the stable bonding of the antenna conductor and the breathable medium can be ensured. Due to the simple preparation method and the cheap materials, the design and the method provided by the invention are beneficial to accelerating the application of the breathable antenna in the field of flexible skin electronics.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
FIG. 1 is a schematic diagram of a structure of a breathable flexible butterfly antenna according to the present invention;
FIG. 2 is a scanning electron micrograph of a breathable thermoplastic polyurethane according to the present invention;
FIGS. 3a and 3b are scanning electron micrographs of the antenna conductor of the present invention, FIG. 3a is a corresponding silver sphere electron micrograph, and FIG. 3b is a corresponding carbon nanotube electron micrograph;
FIG. 4 is a flow chart of the preparation of the breathable flexible butterfly antenna according to the present invention;
FIG. 5 is a tensile strain sensing performance curve of the test of the breathable flexible butterfly antenna of the invention;
fig. 6 is a temperature sensing performance curve of the breathable butterfly flexible antenna test in the invention.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
Referring to fig. 1, an embodiment of the present invention provides an ultra-thin flexible air-permeable butterfly antenna with tensile strain and temperature sensing functions, including: top and bottom porous polyurethane breathable fiber films 1 and 4, an intermediate flexible bowtie antenna conductor layer 2, and a conductor support matrix polyimide layer 3.
In this example, the air permeability of the antenna is realized by the porous polyurethane air- permeable fiber films 1 and 4, and the scanning electron microscope thereof is as shown with reference to fig. 2. In addition, the flexible butterfly antenna conductor 2 for oxidation resistance is obtained by laser engraving of silver microspheres and carbon nanotube polymers, and scanning electron micrographs thereof are respectively shown with reference to fig. 3a and 3 b. Although the conductivity of silver is good, the prepared film is difficult to be tightly adhered by the silver balls with the micron scale, and the conductivity of the film can be greatly reduced by the existing gaps, so that the continuity of the whole film conductive path can be ensured by filling the carbon nano tubes with the nano scale, and the conductivity of the film can be improved; in addition, the film impedance can be reduced by increasing the number of silver balls, but the increase of the number tends to cause the surface conductor to be not sticky and compact, so that the conductive film impedance can be better reduced by combining the viscosity of PVA and filling a proper amount of nano conductive material.
Referring to fig. 1-4, the method for manufacturing an ultrathin flexible breathable butterfly antenna with tensile strain and temperature sensing functions according to the present invention includes the following steps:
adding 5-10 mL of carbon nano tube solution with the mass fraction of 5mg/mL into 120 mL beaker, adding 2-5 mg of micron hollow silver balls, and fully stirring for 20-60 min by using a magnetic stirrer to obtain a mixed solution; adding 10mL of deionized water into a 100mL beaker, heating to 100 ℃, adding 0.5-1.5 g of polyvinyl alcohol (PVA) particles, and fully stirring for 1h by using a magnetic stirrer to obtain a polyvinyl alcohol (PVA) solution with the mass fraction of 5-15%; mixing the mixed solution with a polyvinyl alcohol aqueous solution according to a mass ratio of 1: (0.6-1), fully stirring for 0.5-1.5 h by using a magnetic stirrer, and carrying out vacuum filtration for 30-60 min to obtain the solution-type conducting polymer A.
Washing a block of 6X 6cm with alcohol and deionized water2PI film with size and thickness of 8 μm for 1-5 min, blow-drying with hot air, and adhering to a thickness of 10 × 10cm2Fixing the glass slide on a spin coater on a large glass slide, and inverting the prepared conductive polymer A on the glass slide, as shown in step a in FIG. 4; spin-coating at a rotation speed of 500-1000 r/min for 10-30 s; and then placing the spin-coated conductive polymer A film on a drying table at 600-900 ℃ for heating for 0.5-2 h, so that the conductive polymer A film is cured, and the flexible composite conductive film is obtained.
and (3) introducing the designed digital file with the butterfly structure into a nanosecond laser, then adsorbing the flexible composite film prepared in the step S1 on a laser etching platform through vacuum, placing the glass slide with the fixed flexible conductive film under a 355nm ultraviolet laser B, inputting a pre-designed structure outline C, and carrying out 1-5 times of circular cutting by adjusting the power of ultraviolet light to 3-5W and the cutting speed to 100-600 mm/min, wherein the step B is shown in FIG. 4, and carrying out laser etching. And (e) after the cutting of the whole contour is finished, peeling off the residual conductive film by using a pair of tweezers, and peeling off the residues in the step (c) shown in fig. 4, thereby obtaining the flexible butterfly antenna conductor layer 2 with the butterfly structure, which is pre-designed and is covered with the PI conductor support matrix 3 on the surface.
preparing a block of 6X 6cm2And (3) tearing off the protective paper on one surface of the water-soluble adhesive tape D of the AQUASOL company in the size, preparing a complete PI-coated flexible butterfly antenna conductor layer 2 by using the adhesive surface for de-sticking, transferring the complete PI-coated flexible butterfly antenna conductor layer onto the hydrosol tape, and transferring the PI-coated flexible butterfly antenna conductor layer 2 in the step D shown in FIG. 4. Then the transferred conductor layer 2 covered with the PI flexible butterfly antenna is pasted to a sheet of 6 multiplied by 6cm2The porous polyurethane breathable fiber film F;and (3) placing the film on a heat pressing machine under the conditions of 100-120 kPa force and 100-120 ℃ for 5-15 s to ensure that the PI film and the porous polyurethane breathable fiber film are adhered to each other, so as to obtain the PI flexible butterfly antenna conductor layer 2 which is transferred on the porous polyurethane breathable fiber film 4 and covered with the PI flexible butterfly antenna.
S4, antenna packaging:
placing the porous polyurethane breathable fiber film with the water-soluble adhesive tape in deionized water E for soaking for 0.5-1 h until the water-soluble adhesive tape C is completely dissolved by the deionized water, as shown in step E of FIG. 4, dissolving the water-soluble adhesive tape C; drying the residual moisture of the whole butterfly antenna conductor by a heating table, and then covering a layer of 6 multiplied by 6cm on the antenna conductor2And (3) placing the large and small porous polyurethane breathable fiber film under the conditions of 60-90 kPa force and 100-120 ℃ for hot pressing for 5-15 s, and cooling to obtain the breathable butterfly flexible antenna. See step f of fig. 4.
The invention is further illustrated by the following specific examples.
Example 1
according to the mass ratio of 8: 3, adding a micron hollow silver ball into a carbon nanotube solution with the mass fraction of 5mg/mL to obtain a mixed solution, wherein the mass ratio of the micron hollow silver ball to the carbon nanotube solution is 1: 0.7, mixing the mixed solution with a polyvinyl alcohol aqueous solution with the mass concentration of 10%, centrifugally stirring for 1h, and carrying out vacuum filtration for 40min to obtain a conductive polymer A; conducting polymer A is spin-coated for 20s at the rotating speed of 800r/min, the conducting polymer A is spin-coated on a PI film, and the spin-coated conducting polymer A film is placed on a 700 ℃ baking table to be heated for 1.5h, so that the flexible conducting film is obtained.
and (2) introducing the designed butterfly-shaped glass carrier plate into a nanosecond laser, then adsorbing the film prepared in the step (1) on a laser etching platform through vacuum, performing 4-time circular cutting by adjusting the power of ultraviolet light to 3W and the cutting speed to 300mm/min, and ablating the composite conductive film on the glass carrier plate through laser to obtain a flexible butterfly-shaped antenna conductor layer which is covered with a PI conductor support matrix on the surface and has a butterfly-shaped structure.
transferring the conductor layer covered with the PI flexible butterfly antenna to a hydrosol belt, and sticking the transferred conductor layer covered with the PI flexible butterfly antenna to a sheet of 6 multiplied by 6cm2The porous polyurethane breathable fiber film F; and (3) placing the film under the conditions of 120kPa force and 100 ℃ for hot pressing for 10s to ensure that the PI film is adhered to the porous polyurethane breathable fiber film, so as to obtain the PI flexible butterfly antenna conductor layer which is transferred and printed on the porous polyurethane breathable fiber film and covered with the PI flexible butterfly antenna conductor layer.
S4, antenna packaging:
placing the porous polyurethane breathable fiber film with the water-soluble adhesive tape in deionized water E for soaking for 0.5-1 h, and dissolving the water-soluble adhesive tape C; drying residual moisture of the butterfly-shaped antenna conductor, and covering a layer of 6 multiplied by 6cm on the PI flexible butterfly-shaped antenna conductor layer2And (3) placing the large and small porous polyurethane breathable fiber film under the conditions of 60-90 kPa force and 100 ℃ for hot pressing for 15s, and cooling to obtain the breathable butterfly flexible antenna.
Example 2
according to the mass ratio of 10: 4, adding a micron hollow silver ball into a carbon nanotube solution with the mass fraction of 5mg/mL to obtain a mixed solution, wherein the mass ratio of the micron hollow silver ball to the carbon nanotube solution is 1: 0.6 mixing the mixed solution with a 7% polyvinyl alcohol aqueous solution, centrifugally stirring for 1.5h, and carrying out vacuum filtration for 30min to obtain a conductive polymer A; conducting polymer A is spin-coated for 15s at the rotating speed of 600r/min, the conducting polymer A is spin-coated on a PI film, and the spin-coated conducting polymer A film is placed on a 600 ℃ baking table to be heated for 2h, so that the flexible conducting film is obtained.
and (2) introducing the designed butterfly-shaped glass carrier plate into a nanosecond laser, then adsorbing the film prepared in the step (1) on a laser etching platform through vacuum, carrying out 3-time circular cutting by adjusting the power of ultraviolet light to 4W and the cutting speed to be 500mm/min, and ablating the composite conductive film on the glass carrier plate through laser to obtain a pre-designed flexible butterfly-shaped antenna conductor layer with a PI conductor support substrate covered on the surface and a butterfly-shaped structure.
will coverTransferring the conductor layer with the PI flexible butterfly antenna to a hydrosol belt, and sticking the transferred conductor layer coated with the PI flexible butterfly antenna to a 6 multiplied by 6cm sheet2The porous polyurethane breathable fiber film F; and (3) placing the film at the temperature of 120 ℃ under the condition of 110kPa for 5s, and ensuring that the PI film is adhered to the porous polyurethane breathable fiber film to obtain a PI flexible butterfly antenna conductor layer which is transferred and printed on the porous polyurethane breathable fiber film and covered with the PI flexible butterfly antenna.
S4, antenna packaging:
placing the porous polyurethane breathable fiber film with the water-soluble adhesive tape in deionized water E for soaking for 0.5-1 h, and dissolving the water-soluble adhesive tape C; drying residual moisture of the butterfly-shaped antenna conductor, and covering a layer of 6 multiplied by 6cm on the PI flexible butterfly-shaped antenna conductor layer2And (3) placing the large and small porous polyurethane breathable fiber film under the conditions of 60-90 kPa force and 110 ℃ for hot pressing for 12s, and cooling to obtain the breathable butterfly flexible antenna.
Example 3
according to the mass ratio of 5: 3, adding a micron hollow silver ball into a carbon nanotube solution with the mass fraction of 5mg/mL to obtain a mixed solution, wherein the mass ratio of the micron hollow silver ball to the carbon nanotube solution is 1: 0.8 mixing the mixed solution with a polyvinyl alcohol aqueous solution with the mass concentration of 12%, centrifugally stirring for 0.5h, and carrying out vacuum filtration for 50min to obtain a conductive polymer A; conducting polymer A is spin-coated for 25s at the rotating speed of 700r/min, the conducting polymer A is spin-coated on a PI film, and the spin-coated conducting polymer A film is placed on a baking table at the temperature of 800 ℃ and heated for 1h to obtain the flexible conducting film.
and (2) introducing the designed butterfly-shaped glass carrier plate into a nanosecond laser, then adsorbing the film prepared in the step (1) on a laser etching platform through vacuum, carrying out 1-time circular cutting by adjusting the power of ultraviolet light to 5W and the cutting speed to be 600mm/min, and ablating the composite conductive film on the glass carrier plate through laser to obtain a pre-designed flexible butterfly-shaped antenna conductor layer with a PI conductor support substrate covered on the surface and a butterfly-shaped structure.
will be covered with PI flexible butterflyTransferring the conductor layer of the shape antenna to a hydrosol belt, and sticking the transferred conductor layer coated with the PI flexible butterfly-shaped antenna to a sheet of 6 multiplied by 6cm2The porous polyurethane breathable fiber film F of (a); and placing the film at 100kPa for 15s under 100 ℃ to ensure that the PI film is adhered to the porous polyurethane breathable fiber film, thereby obtaining the PI flexible butterfly antenna conductor layer which is transferred and printed on the porous polyurethane breathable fiber film and is covered.
S4, antenna packaging:
placing the porous polyurethane breathable fiber film with the water-soluble adhesive tape in deionized water E for soaking for 0.5-1 h, and dissolving the water-soluble adhesive tape C; drying residual moisture of the butterfly-shaped antenna conductor, and covering a layer of 6 multiplied by 6cm on the PI flexible butterfly-shaped antenna conductor layer2And (3) placing the large and small porous polyurethane breathable fiber film under the conditions of 60-90 kPa force and 120 ℃ for hot pressing for 5s, and cooling to obtain the breathable butterfly flexible antenna.
Example 4
according to the mass ratio of 6: 2, adding a micron hollow silver ball into a carbon nanotube solution with the mass fraction of 5mg/mL to obtain a mixed solution, wherein the mass ratio of the micron hollow silver ball to the carbon nanotube solution is 1: 1, mixing the mixed solution with a polyvinyl alcohol aqueous solution with the mass concentration of 15%, centrifugally stirring for 0.8h, and carrying out vacuum filtration for 60min to obtain a conductive polymer A; conducting polymer A is spin-coated for 10s at the rotating speed of 1000r/min, the conducting polymer A is spin-coated on a PI film, and the spin-coated conducting polymer A film is placed on a drying table at the temperature of 900 ℃ and heated for 0.5h, so that the flexible conducting film is obtained.
and (2) introducing the designed butterfly-shaped glass carrier plate into a nanosecond laser, then adsorbing the film prepared in the step (1) on a laser etching platform through vacuum, carrying out 4-time circular cutting by adjusting the power of ultraviolet light to 3.5W and the cutting speed to be 200mm/min, and ablating the composite conductive film on the glass carrier plate through laser to obtain a flexible butterfly-shaped antenna conductor layer which is pre-designed, is covered with a PI conductor supporting substrate on the surface and has a butterfly-shaped structure.
to be covered with PI flexible butterfly antennaTransferring the conductor layer to a hydrosol belt, and sticking the transferred conductor layer coated with the PI flexible butterfly antenna to a 6 x 6cm sheet2The porous polyurethane breathable fiber film F of (a); and (3) placing the film on a heat pressing machine under the conditions of 120kPa force and 105 ℃ for 5-15 s, ensuring that the PI film and the porous polyurethane breathable fiber film are adhered to each other, and obtaining a PI flexible butterfly antenna conductor layer coated on the porous polyurethane breathable fiber film in a transfer printing manner.
S4, antenna packaging:
placing the porous polyurethane breathable fiber film with the water-soluble adhesive tape in deionized water E for soaking for 0.5-1 h, and dissolving the water-soluble adhesive tape C; drying residual moisture of the butterfly-shaped antenna conductor, and covering a layer of 6 multiplied by 6cm on the PI flexible butterfly-shaped antenna conductor layer2And (3) placing the large and small porous polyurethane breathable fiber film under the conditions of 60-90 kPa force and 105 ℃ for hot pressing for 8s, and cooling to obtain the breathable butterfly flexible antenna.
Example 5
according to the mass ratio of 7: 5, adding a micron hollow silver ball into a carbon nanotube solution with the mass fraction of 5mg/mL to obtain a mixed solution, wherein the mass ratio of the micron hollow silver ball to the carbon nanotube solution is 1: 0.9, mixing the mixed solution with a polyvinyl alcohol aqueous solution with the mass concentration of 5%, centrifugally stirring for 1.2h, and carrying out vacuum filtration for 35min to obtain a conductive polymer A; conducting polymer A is spin-coated for 30s at the rotating speed of 500r/min, the conducting polymer A is spin-coated on a PI film, and the spin-coated conducting polymer A film is placed on a baking table at the temperature of 850 ℃ and heated for 1h to obtain the flexible conducting film.
and (2) introducing the designed butterfly-shaped glass carrier plate into a nanosecond laser, then adsorbing the film prepared in the step (1) on a laser etching platform through vacuum, carrying out 5-time circular cutting by adjusting the power of ultraviolet light to 3-5W and the cutting speed to be 100mm/min, and ablating the composite conductive film on the glass carrier plate through laser to obtain a flexible butterfly-shaped antenna conductor layer 2 which is pre-designed, is covered with a PI conductor supporting substrate 3 on the surface and has a butterfly-shaped structure.
a flexible butterfly antenna guide covered with PITransferring the body layer to hydrosol belt, and sticking the transferred conductor layer coated with PI flexible butterfly antenna to a sheet of 6 × 6cm2The porous polyurethane breathable fiber film F; and (3) placing the film under the conditions of 100kPa force and 115 ℃ for hot pressing for 5-15 s, ensuring that the PI film is adhered to the porous polyurethane breathable fiber film, and obtaining a PI flexible butterfly antenna conductor layer coated on the porous polyurethane breathable fiber film by transfer printing.
S4, antenna packaging:
placing the porous polyurethane breathable fiber film with the water-soluble adhesive tape in deionized water E for soaking for 0.5-1 h, and dissolving the water-soluble adhesive tape C; drying residual moisture of the butterfly-shaped antenna conductor, and covering a layer of 6 multiplied by 6cm on the PI flexible butterfly-shaped antenna conductor layer2And (3) placing the large and small porous polyurethane breathable fiber film under the conditions of 60-90 kPa force and 115 ℃ for hot pressing for 7s, and cooling to obtain the breathable butterfly flexible antenna.
As shown in FIG. 5, in the uniaxial stretching process of 0-9.6%, the resonance depth of the antenna and the stretching strain of the antenna prepared by the invention are in a certain inverse proportion relation, and the antenna has good strain sensing capability.
As shown in FIG. 6, in the uniaxial stretching process of 20-95 ℃, the resonant frequency of the antenna prepared by the invention has a certain inverse relation with the applied temperature, and the antenna has good temperature sensing capability.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts based on the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (10)
1. The preparation method of the ultrathin breathable flexible butterfly antenna with stretching and temperature sensing functions is characterized by comprising the following steps of:
s1, preparing a flexible conductor:
according to the mass ratio (5-10): (2-5) adding micron hollow silver spheres into the carbon nano tube solution to obtain a mixed solution, wherein the mass ratio of the micron hollow silver spheres to the carbon nano tube solution is 1: (0.6-1) mixing the mixed solution with a polyvinyl alcohol aqueous solution, carrying out centrifugal stirring and vacuum filtration to obtain a conductive polymer A; spin-coating a conductive polymer A on a PI film, drying and curing to obtain a flexible conductive film;
s2, cutting the butterfly structure:
adsorbing the flexible conductive film prepared in the step S1 on a butterfly-shaped glass carrier plate through vacuum, performing circular cutting by adjusting the power and cutting speed of ultraviolet light, ablating the flexible conductive film on the glass carrier plate through laser, and peeling off the residual conductive film to obtain a flexible butterfly-shaped antenna conductor layer with the surface covered with a PI conductor support substrate;
s3, antenna conductor transfer:
attaching the flexible butterfly antenna conductor layer coated with the PI conductor support matrix to a porous thermoplastic polyurethane film fiber film, and placing the porous thermoplastic polyurethane film fiber film under a hot press for hot pressing to obtain a PI flexible butterfly antenna conductor layer coated on the porous polyurethane breathable fiber film by transfer printing;
s4, antenna packaging:
and washing the transferred antenna conductor by using deionized water, drying at low temperature, covering a layer of porous thermoplastic polyurethane fiber film on the surface layer of the obtained butterfly-shaped structure, and performing secondary hot pressing to obtain the breathable flexible butterfly-shaped antenna.
2. The method according to claim 1, wherein the mass fraction of the carbon nanotube solution is 5 mg/mL.
3. The method according to claim 1, wherein the aqueous polyvinyl alcohol solution has a mass concentration of 5 to 15%.
4. The preparation method of claim 1, wherein the centrifugal stirring is performed for 0.5-1.5 h, and the vacuum filtration is performed for 30-60 min.
5. The method according to claim 1, wherein the spin coating is performed at a speed of 500 to 1000r/min for 10 to 30 seconds; and (3) placing the spin-coated conductive polymer A film on a drying table at the temperature of 600-900 ℃ for heating for 0.5-2 h.
6. The preparation method of claim 1, wherein the butterfly-shaped structure is cut, a designed digital file of the butterfly-shaped structure is guided into a nanosecond laser, the prepared flexible composite film is adsorbed on a laser etching platform through vacuum, a glass slide with the flexible conductive film fixed is placed under an ultraviolet laser, a pre-designed structure profile is input, and cyclic cutting is performed by adjusting the power and cutting speed of ultraviolet light.
7. The method according to claim 6, wherein the power of the ultraviolet light is 3-5W, the cutting speed is 100-600 mm/min, and 1-5 times of cyclic cutting are performed.
8. The method for preparing the antenna conductor according to the claim 1, wherein the antenna conductor is transferred, and the complete PI flexible butterfly antenna conductor layer is prepared by the adhesive surface de-sticking of a water-soluble adhesive tape and is transferred to the hydrosol tape.
9. The preparation method according to claim 1, wherein the hot press is used for hot pressing for 5-15 s under the conditions of 100-120 kPa force and 100-120 ℃; and carrying out hot pressing for 5-15 s under the conditions of 60-90 kPa force and 120 ℃.
10. An ultra-thin breathable flexible bowtie antenna with stretch and temperature sensing made by the method of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210240911.6A CN114639937B (en) | 2022-03-10 | 2022-03-10 | Ultrathin breathable flexible butterfly antenna with stretching and temperature sensing functions and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210240911.6A CN114639937B (en) | 2022-03-10 | 2022-03-10 | Ultrathin breathable flexible butterfly antenna with stretching and temperature sensing functions and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114639937A true CN114639937A (en) | 2022-06-17 |
| CN114639937B CN114639937B (en) | 2023-02-21 |
Family
ID=81948557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210240911.6A Active CN114639937B (en) | 2022-03-10 | 2022-03-10 | Ultrathin breathable flexible butterfly antenna with stretching and temperature sensing functions and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114639937B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115171957A (en) * | 2022-07-08 | 2022-10-11 | 东北电力大学 | Combined negative Poisson ratio flexible electrode imitating butterfly and honeycomb appearance structures |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087886A (en) * | 2009-12-08 | 2011-06-08 | 中国科学院福建物质结构研究所 | Silver nanowire-based transparent conductive thin film and preparation method thereof |
| CN103011124A (en) * | 2009-01-16 | 2013-04-03 | 清华大学 | Preparation method of carbon nano tube composite film |
| CN104575687A (en) * | 2014-10-28 | 2015-04-29 | 天津工业大学 | Carbon nano tube flexible and transparent conductive thin film with strong adhesive force and method for preparing thin film |
| US20160128187A1 (en) * | 2014-10-30 | 2016-05-05 | National Taiwan University | Flexible and transparent electrode and manufacturing method thereof |
| CN109659071A (en) * | 2019-01-21 | 2019-04-19 | 华碳研发(深圳)有限公司 | Carbon nanotubes and the flexible composite polymeric object film of nano silver and preparation method thereof |
| CN109817383A (en) * | 2018-12-19 | 2019-05-28 | 中山大学 | The method and high sensitivity strain transducer of carbon nanotube conductive thin film are prepared using seal transfer |
| CN110565123A (en) * | 2019-08-28 | 2019-12-13 | 清华大学 | Manufacturing method and device of transferable transparent flexible breathable antenna |
| US20200219634A1 (en) * | 2017-01-19 | 2020-07-09 | Centre National De La Recherche Scientifique | Method for preparation an electrically conductive stratified composite structure |
| CN111462941A (en) * | 2020-04-13 | 2020-07-28 | 安徽宇航派蒙健康科技股份有限公司 | Carbon nano tube composite flexible conductive film and preparation method thereof |
| CN113855322A (en) * | 2021-09-22 | 2021-12-31 | 西安电子科技大学 | Wireless fully-integrated flexible stretchable artificial larynx based on mechanical acoustics and preparation method thereof |
| CN113871054A (en) * | 2021-09-27 | 2021-12-31 | 中国科学院长春应用化学研究所 | Flexible transparent conductive film and preparation method thereof |
-
2022
- 2022-03-10 CN CN202210240911.6A patent/CN114639937B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011124A (en) * | 2009-01-16 | 2013-04-03 | 清华大学 | Preparation method of carbon nano tube composite film |
| CN102087886A (en) * | 2009-12-08 | 2011-06-08 | 中国科学院福建物质结构研究所 | Silver nanowire-based transparent conductive thin film and preparation method thereof |
| CN104575687A (en) * | 2014-10-28 | 2015-04-29 | 天津工业大学 | Carbon nano tube flexible and transparent conductive thin film with strong adhesive force and method for preparing thin film |
| US20160128187A1 (en) * | 2014-10-30 | 2016-05-05 | National Taiwan University | Flexible and transparent electrode and manufacturing method thereof |
| US20200219634A1 (en) * | 2017-01-19 | 2020-07-09 | Centre National De La Recherche Scientifique | Method for preparation an electrically conductive stratified composite structure |
| CN109817383A (en) * | 2018-12-19 | 2019-05-28 | 中山大学 | The method and high sensitivity strain transducer of carbon nanotube conductive thin film are prepared using seal transfer |
| CN109659071A (en) * | 2019-01-21 | 2019-04-19 | 华碳研发(深圳)有限公司 | Carbon nanotubes and the flexible composite polymeric object film of nano silver and preparation method thereof |
| CN110565123A (en) * | 2019-08-28 | 2019-12-13 | 清华大学 | Manufacturing method and device of transferable transparent flexible breathable antenna |
| CN111462941A (en) * | 2020-04-13 | 2020-07-28 | 安徽宇航派蒙健康科技股份有限公司 | Carbon nano tube composite flexible conductive film and preparation method thereof |
| CN113855322A (en) * | 2021-09-22 | 2021-12-31 | 西安电子科技大学 | Wireless fully-integrated flexible stretchable artificial larynx based on mechanical acoustics and preparation method thereof |
| CN113871054A (en) * | 2021-09-27 | 2021-12-31 | 中国科学院长春应用化学研究所 | Flexible transparent conductive film and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| SHEIKH DOBIR HOSSAIN等: "Flexible EGaIn Liquid Metal Microstrip Patch Antenna Based Pressure Sensor", 《2021 IEEE SENSORS》 * |
| 刘中胜等: "碳纳米管/纳米银可拉伸电极的制备及柔性天线的研究", 《东华大学学报(自然科学版)》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115171957A (en) * | 2022-07-08 | 2022-10-11 | 东北电力大学 | Combined negative Poisson ratio flexible electrode imitating butterfly and honeycomb appearance structures |
| CN115171957B (en) * | 2022-07-08 | 2024-06-07 | 东北电力大学 | Combined negative poisson ratio flexible electrode imitating butterfly and honeycomb appearance structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114639937B (en) | 2023-02-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108384327B (en) | Stretching-induced conductive liquid metal particle-based conductive ink, and preparation method and application thereof | |
| CN114639937B (en) | Ultrathin breathable flexible butterfly antenna with stretching and temperature sensing functions and preparation method thereof | |
| CN108112177B (en) | Preparation method of flexible transparent circuit | |
| CN112216419B (en) | Normal-temperature low-pressure transfer printing method for flexible conductive film | |
| Verma et al. | Biodegradable photolithography compatible substrate for transparent transient electronics and flexible energy storage devices | |
| CN106084268A (en) | A kind of preparation method of nano silver wire/dimethyl silicone polymer laminated film | |
| CN216284043U (en) | High-linearity flexible pressure sensor with adjustable sensitivity | |
| CN112816111A (en) | Flexible touch sensor and manufacturing method thereof | |
| WO2021068273A1 (en) | Method for manufacturing capacitive strain sensor using sandpaper surface microstructure as template | |
| CN102023064B (en) | Extrusion-type interelectrode sulfuration forming and encapsulating method for researching flexible sensor sensitive element | |
| CN110500943A (en) | A kind of patterned flex strain transducer and preparation method | |
| CN111348616A (en) | Implantable neural electrode and preparation method thereof | |
| CN207040147U (en) | A kind of electromagnetic shielding film of novel metalloid system and products thereof | |
| CN209820394U (en) | Flexible stretchable strain sensor | |
| CN110260893B (en) | Preparation method of capacitive flexible sensor | |
| CN114855460B (en) | Preparation method of electrothermal stimulation shape memory FPC electromagnetic shielding film | |
| CN110136889B (en) | Preparation method of three-dimensional stretchable conductor | |
| CN107135641A (en) | A kind of electromagnetic shielding film of novel metalloid system and preparation method thereof | |
| JP2023553168A (en) | Stretchable ACF, its manufacturing method, interface bonding member and element including the same | |
| CN114694880A (en) | Skin-like stretchable transparent electrode based on non-homogeneous Young modulus matrix structure and preparation method and application thereof | |
| CN111074541A (en) | Conductive velvet wool-like fiber, preparation method and gloves | |
| JP6506200B2 (en) | Resin-sealed semiconductor device and method of manufacturing the same | |
| Tong et al. | Printed flexible hybrid electronics | |
| Jin Nam et al. | Enhanced conductivity in highly stretchable silver and polymer nanocomposite conductors | |
| CN111462942A (en) | Folding stretchable electrode based on crack type flexible substrate and manufacturing 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 |