CN109029508B - Flexible electronic skin with ventilation, moisture permeability and thermal regulation performance and preparation method thereof - Google Patents
Flexible electronic skin with ventilation, moisture permeability and thermal regulation performance and preparation method thereof Download PDFInfo
- Publication number
- CN109029508B CN109029508B CN201810983371.4A CN201810983371A CN109029508B CN 109029508 B CN109029508 B CN 109029508B CN 201810983371 A CN201810983371 A CN 201810983371A CN 109029508 B CN109029508 B CN 109029508B
- Authority
- CN
- China
- Prior art keywords
- nanofiber
- electronic skin
- nanofiber membrane
- flexible electronic
- elastic
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
-
- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Textile Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses flexible electronic skin with ventilation, moisture permeability and thermal regulation performance and a preparation method thereof, and belongs to the technical field of flexible sensors. The flexible electronic skin consists of a nanofiber membrane and a conductive coating which is incompletely covered on the surface of the nanofiber membrane, wherein the conductive coating is loaded on the surface of the nanofiber membrane in a closed linear mode or/and an unclosed linear mode, and the nanofiber membrane is an elastic polyolefin copolymer nanofiber membrane with a porous structure. On the basis of ensuring the excellent tension/pressure sensing performance of the electronic skin, the electronic skin prepared by the invention has good flexibility, ventilation, moisture permeability and thermal regulation performance due to the special three-dimensional porous structure, elasticity and infrared transmission performance of the polyolefin nanofiber membrane and the design mode that the conductive coating is not completely covered.
Description
Technical Field
The invention relates to flexible electronic skin, belongs to the technical field of flexible sensors, and particularly relates to flexible electronic skin with ventilation, moisture permeability and thermal regulation performance and a preparation method thereof.
Background
In recent years, along with the rapid development of science and technology, the cross fusion of electronic science and technology and the medical field is produced to be a novel sensor-electronic skin which is hopeful to replace human skin, and from the scientific point of view, the electronic skin is a novel wearable bionic touch sensor which can realize an artificial flexible electronic device with human touch sensing function.
Most of the existing flexible electronic skin substrates adopt PDMS films, such as China patent application (application publication No. CN108078543A, application publication No. 2018-05-29) discloses a preparation method of high-sensitivity electronic skin, the electronic skin is provided with a polyvinyl alcohol-silver nanowire/graphene-PDMS sandwich structure, a layer of mutually overlapped and piled silver nanowire conducting network is formed on the surface of a PET substrate in a spraying mode, then a layer of graphene mixed by large graphene and small graphene is uniformly sprayed and dispersed on the silver nanowire network, the graphene is deposited between the silver nanowire networks or communicated with adjacent silver nanowires, the conductivity of the conducting network is further enhanced, a layer of polyvinyl alcohol solution is coated on the surface of the conducting network in a spin coating mode to serve as a matrix of the electronic skin, finally, after the polyvinyl alcohol is dried, a composite film is separated from the PET film, the composite film is transferred into an oven, the surface is turned over, and a layer of PDMS film is evaporated on the surface contacted with the surface, so that the sandwich structure of the electronic skin is obtained.
Another example is chinese patent application (application publication No. CN107778480a, application publication No. 2018-03-09) which discloses a flexible electronic skin sensor and a method for manufacturing the same, wherein the flexible electronic skin sensor comprises a plurality of pressure sensing units; the pressure sensing unit consists of two flexible and telescopic ultrathin PDMS films, two electrodes respectively attached between the two ultrathin PDMS films and a composite pressure sensor film arranged between the two electrodes; the composite pressure sensing membrane consists of a plurality of polyaniline hollow nanospheres and multi-wall carbon nanotubes used for connecting adjacent polyaniline hollow nanospheres, and each pressure sensing unit is processed by using a plasma processor and electrode pixels to form a sensing array with a set area.
The substrate of the flexible electronic skin is a PDMS film, and the PDMS film has the problems of poor air permeability, moisture permeability and thermal regulation performance.
For example, chinese patent application (application publication No. CN107913067A, application publication No. 2018-04-17) discloses an electronic skin based on natural cellulose nanofiber and a preparation method thereof, wherein conductive nano materials such as carbon nanotubes, graphene, silver nanowires and the like are fixed on a Bacterial Cellulose (BC) nanofiber membrane by adopting a suction filtration or electrostatic adsorption method to endow the fiber membrane with conductive properties; and placing a polyethylene film serving as a dielectric layer between two conductive BC nanofiber films with uniform thickness to form a miniature stretchable and compressible capacitor, thus obtaining the electronic skin based on the natural cellulose nanofiber. The preparation method has the advantages that technical support is provided for searching the electronic skin with better biocompatibility for replacing the synthetic polymer, and the preparation method has the advantages that after the surface of the natural cellulose nanofiber membrane is adsorbed with the conductive nanomaterial, the air permeability, the moisture permeability and the thermal regulation performance of the natural cellulose nanofiber membrane are greatly reduced, and meanwhile, the preparation process of the preparation method is complex and is not beneficial to industrialization.
Disclosure of Invention
In order to solve the technical problems, the invention provides the flexible electronic skin with air permeability, moisture permeability and thermal regulation performance, which has the advantages of simple process, low cost and suitability for industrial production, and the preparation method thereof.
In order to achieve the above purpose, the invention discloses a flexible electronic skin with air permeability, moisture permeability and thermal regulation performance, which consists of a nanofiber membrane and a conductive coating with a specific shape loaded on the surface of the nanofiber membrane, wherein the conductive coating is arranged on the surface of the nanofiber membrane in a manner of not completely covering the surface of the nanofiber membrane, and the nanofiber membrane is an elastic polyolefin copolymer nanofiber membrane with a porous structure.
Further, the specific shape is composed of a closed line type or/and an unclosed line type.
Further, the specific shape is composed of a closed line shape.
Further, the closed line shape includes one of a circular ring shape, a circular shape, or a polygonal shape.
Optimally, the closed line shape is a circular ring shape.
Optimally, at least 1 annular conductive coating is loaded on the surface of the nanofiber membrane.
Optimally, the closed line shape is circular.
Optimally, the closed line shape is square.
Further, the specific shape is composed of a line shape that is not closed.
Further, the non-closed line type includes one of a curved line type, a broken line type, or a straight line type.
Optimally, the non-closed linear type is a broken line type, and at least 1 broken line type conductive coating is loaded on the surface of the nanofiber membrane.
Optimally, a plurality of broken line type conductive coatings are loaded on the surface of the nanofiber membrane, all broken line type conductive coatings are arranged in a matrix mode, and a space is reserved between every two adjacent broken line type conductive coatings.
Optimally, the non-closed linear shape is serpentine, and at least 1 serpentine conductive coating is loaded on the surface of the nanofiber membrane.
Optimally, the non-closed linear shape is a linear shape, and at least 1 linear conductive coating is loaded on the surface of the nanofiber membrane.
The invention is printed on the surface of the nanofiber membrane in an incomplete coverage way by a screen brush or a stencil printing method, so that the channel of the nanofiber membrane is prevented from being blocked, the ventilation and moisture permeability channel and the thermal regulation performance are ensured, and meanwhile, the conductive coating with a specific shape can ensure smooth conduction on the surface of the nanofiber membrane due to the conductive path inside.
Further, the thickness of the nanofiber membrane is 30-150 mu m, and the thickness of the conductive coating is 40-120 mu m, so that good conductivity and tensile force/stress sensibility can be realized on the basis of air permeability, moisture permeability and thermal regulation performance.
Optimally, the thickness of the nanofiber membrane is 30 microns, and the thickness of the conductive coating is 40 microns.
Optimally, the thickness of the nanofiber membrane is 40 microns, and the thickness of the conductive coating is 45 microns.
Optimally, the thickness of the nanofiber membrane is 60 microns, and the thickness of the conductive coating is 50 microns.
Optimally, the thickness of the nanofiber membrane is 90 microns, and the thickness of the conductive coating is 60 microns.
Optimally, the thickness of the nanofiber membrane is 110 microns, and the thickness of the conductive coating is 80 microns.
Optimally, the thickness of the nanofiber membrane is 120 μm, and the thickness of the conductive coating is 95 μm.
Optimally, the thickness of the nanofiber membrane is 135 μm, and the thickness of the conductive coating is 110 μm.
Optimally, the thickness of the nanofiber membrane is 150 μm, and the thickness of the conductive coating is 120 μm.
Further, the diameter of the nanofiber of the elastic polyolefin copolymer nanofiber membrane is 500-700 nm, and the pore size distribution is 50-750 nm, so that the elastic polyolefin copolymer nanofiber membrane does not absorb middle infrared rays, and therefore has good permeability to infrared radiation in a human body, and meanwhile, the three-dimensional porous structure of the elastic polyolefin copolymer nanofiber membrane ensures the permeation of water vapor and other gases on the surface of the skin of the human body, so that the flexible electronic skin has good air permeability, moisture permeability and thermal regulation performance.
Preferably, the nanofiber diameter of the elastic polyolefin copolymer nanofiber membrane is 610-680 nm, and the pore size distribution is 100-600 nm.
Optimally, the nanofiber diameter of the elastic polyolefin copolymer nanofiber membrane is 620nm, and the pore size distribution is 150nm.
Optimally, the nanofiber diameter of the elastic polyolefin copolymer nanofiber membrane is 620nm, and the pore size distribution is 200nm.
Optimally, the nanofiber diameter of the elastic polyolefin copolymer nanofiber membrane is 650nm, and the pore size distribution is 350nm.
Optimally, the nanofiber diameter of the elastic polyolefin copolymer nanofiber membrane is 660nm, and the pore size distribution is 500nm.
Further, the conductive coating is made of one of conductive silver paste, metal nanowires, carbon nanotubes or graphene.
Preferably, the metal nanowire includes a silver nanowire, a copper nanowire, an iron nanowire, a cobalt nanowire, or a zinc oxide nanowire.
Optimally, the conductive coating is made of conductive silver paste.
Optimally, the conductive coating is made of silver nanowires.
Optimally, the conductive coating is made of copper nanowires.
In order to better realize the technical purpose of the invention, the invention also discloses a preparation method of the flexible electronic skin with ventilation, moisture permeability and thermal regulation performance, which comprises the steps of adopting one of centrifugal spinning, electrostatic spinning, melt spinning or wet spinning to prepare an elastic polyolefin copolymer nanofiber membrane with the thickness of 30-150 mu m, then coating or cladding a conductive material on the surface of the elastic polyolefin copolymer nanofiber membrane according to a specific shape of the surface of the incomplete covering membrane, and drying to obtain the flexible electronic skin with the thickness of 40-120 mu m of the conductive coating.
Further, the specific process for preparing the elastic polyolefin copolymer nanofiber membrane is as follows:
preparing polyolefin copolymer nanofiber by adopting one of centrifugal spinning, electrostatic spinning, melt spinning or wet spinning, further preparing stable and uniform elastic polyolefin copolymer nanofiber suspension by utilizing one of organic solvents such as a mixture of isopropanol and deionized water, diethyl ether, tertiary butanol, acetone or isobutanol under the ultrahigh-speed shearing action, and then preparing an elastic polyolefin copolymer nanofiber membrane by utilizing a high-pressure airflow forming technology.
Further, one of vapor deposition, magnetron sputtering, electroplating, physical coating or vacuum evaporation is adopted to coat or coat the conductive material on the surface of the elastic polyolefin copolymer nanofiber membrane according to a specific shape of which the surface is not completely covered, wherein the conductive coating cannot completely cover the surface of the nanofiber membrane, which is beneficial to ensuring the air permeability, the moisture permeability channel and the thermal regulation performance of the nanofiber membrane.
The beneficial effects of the invention are mainly reflected in the following aspects:
1. the polyolefin copolymer nanofiber membrane which is the base material adopted by the electronic skin has elasticity and does not absorb middle infrared rays, the interior of the polyolefin copolymer nanofiber membrane has a three-dimensional porous structure, meanwhile, the conductive coating is loaded on the surface of the polyolefin copolymer nanofiber membrane in an incomplete coverage design mode, and the flexible electronic skin prepared by the polyolefin copolymer nanofiber membrane has good permeability and excellent ventilation, moisture permeability and thermal regulation performance on infrared radiation in a human body on the basis of guaranteeing excellent tension/pressure sensing performance, so that the comfort and safety of the wearable flexible electronic skin are improved, and has huge application potential in the field of wearable electronic devices;
2. the preparation method disclosed by the invention has the advantages that the conductive coating is distributed on the surface of the nanofiber membrane according to a specific shape, and the design method is simple and conventional and is suitable for industrial production.
Drawings
FIG. 1 is a top view of the flexible electronic skin of the present invention; wherein, the marks in fig. 1 are as follows:
a nanofiber membrane 1 and a conductive coating 2.
Detailed Description
The invention discloses a flexible electronic skin with ventilation, moisture permeability and thermal regulation performance, which consists of a nanofiber membrane and a conductive coating with a specific shape, wherein the conductive coating is loaded on the surface of the nanofiber membrane, the conductive coating is arranged on the surface of the nanofiber membrane in a mode of incompletely covering the surface of the nanofiber membrane, in particular, the specific shape of the conductive coating consists of a closed linear shape or/and an unclosed linear shape, preferably, the closed linear shape comprises one of a circular shape, a circular shape or a polygonal shape, the unclosed linear shape comprises a linear shape, a curved shape or a broken line shape, and the further preferred conductive coating is a broken line shape, as shown in figure 1, the flexible electronic skin is preferably composed of a nanofiber membrane 1 and a broken line type conductive coating 2 loaded on the surface of the nanofiber membrane 1, the pressure sensing test is carried out on the flexible electronic skin, and the test result shows that the lowest detection tensile deformation lower limit of the flexible electronic skin is 0.05%, the response time when stress is applied is 10ms, and the response time when stress is 20ms, and the flexible electronic skin with the broken line type conductive coating has better pressure withdrawal capability; meanwhile, as the folded line type conductive coating is loaded on the surface of the nanofiber membrane in an incomplete coverage manner, the ability of outward heat transfer, moisture permeability and heat regulation of the nanofiber membrane is reserved.
The nanofiber membrane is also preferably an elastic polyolefin copolymer nanofiber membrane with a porous structure, wherein the water vapor transmittance of the elastic polyolefin copolymer nanofiber membrane is 2840g/m 2 D, after the elastic polyolefin copolymer nanofiber membrane and the ultrathin PDMS membrane are respectively covered on human skin (moisture 39% and temperature 33.8 ℃) for 15min, the skin moisture under the elastic polyolefin copolymer nanofiber membrane is 40%, the temperature is 34 ℃, and the skin moisture under the ultrathin PDMS membrane is 47%, and the temperature is 34.4 ℃, which shows that the nanofiber membrane has better ventilation, moisture permeability and heat regulation functions.
In order to better explain the present invention, the main content of the present invention is further explained below in conjunction with the specific preparation methods, but the content of the present invention is not limited to the preparation methods of the following examples.
Example 1
The embodiment discloses a preparation method of flexible electronic skin with ventilation, moisture permeability and thermal regulation performance, which comprises the following specific preparation processes:
weighing 3-5 g of elastic polyolefin thermoplastic elastomer nanofiber, dispersing the nanofiber in 800-1000 mL of organic solvent diethyl ether by adopting ultra-high speed shearing action to obtain elastic nanofiber suspension, and then spraying 40-80 mL of elastic nanofiber suspension by utilizing a high-pressure airflow forming technology to prepare the elastic polyolefin copolymer nanofiber membrane with the thickness of 35 mu m.
The conductive silver paste material with conductive performance is coated or coated on the surface of the prepared nanofiber membrane according to the designed serpentine shape by adopting physical coating, and is dried to obtain the conductive coating with the thickness of 40 mu m, namely the flexible electronic skin with air permeability, moisture permeability and thermal regulation performance is finally obtained,the water vapor transmission rate of the flexible electronic skin is 2805g/m 2 D, after the flexible electronic skin and the ultra-thin PDMS film were covered on the human skin (moisture 39%, temperature 33.8 ℃) for 15min, the skin moisture under the flexible electronic skin was 41%, the temperature was 34.03 ℃, the skin moisture under the ultra-thin PDMS film was 47%, and the temperature was 34.4 ℃.
Example 2
The embodiment discloses a preparation method of flexible electronic skin with ventilation, moisture permeability and thermal regulation performance, which comprises the following specific preparation processes:
weighing 3-5 g of elastic polyolefin thermoplastic elastomer nanofiber, dispersing the nanofiber in 800-1000 mL of organic solvent diethyl ether by adopting ultra-high speed shearing action to obtain elastic nanofiber suspension, and then spraying 40-80 mL of elastic nanofiber suspension by utilizing a high-pressure airflow forming technology to prepare the elastic polyolefin copolymer nanofiber membrane with the thickness of 60 mu m.
The silver nanowire material with the conductive performance is coated or coated on the surface of the prepared nanofiber membrane according to the designed ring shape by adopting physical coating, and is dried to obtain the conductive coating with the thickness of 45 mu m, namely the flexible electronic skin with the air permeability, the moisture permeability and the thermal regulation performance is finally obtained, and the water vapor transmittance of the flexible electronic skin is 2783g/m 2 D, after the flexible electronic skin and the ultra-thin PDMS film were respectively covered on the human skin (moisture 39%, temperature 33.8 ℃) for 15min, the skin moisture under the flexible electronic skin was 42%, the temperature was 34.16 ℃, the skin moisture under the ultra-thin PDMS film was 47%, and the temperature was 34.4 ℃.
Example 3
The embodiment discloses a preparation method of flexible electronic skin with ventilation, moisture permeability and thermal regulation performance, which comprises the following specific preparation processes:
weighing 3-5 g of elastic polyolefin thermoplastic elastomer nanofiber, dispersing the nanofiber in 800-1000 mL of organic solvent diethyl ether by adopting ultra-high speed shearing action to obtain elastic nanofiber suspension, and then spraying 40-80 mL of elastic nanofiber suspension by utilizing a high-pressure airflow forming technology to prepare the elastic polyolefin copolymer nanofiber membrane with the thickness of 80 mu m.
The copper nanowire material with the electric conduction performance is coated or covered on the surface of the prepared nanofiber membrane according to the designed curve shape by adopting physical coating, and the surface is dried to obtain the thickness of the electric conduction coating which is 60 mu m, namely the flexible electronic skin with the air permeation, moisture permeation and heat regulation performance is finally obtained, and the water vapor permeability of the flexible electronic skin is 2612g/m 2 D, after the flexible electronic skin and the ultra-thin PDMS film were respectively covered on the human skin (moisture 39%, temperature 33.8 ℃) for 15min, the skin moisture under the flexible electronic skin was 43%, the temperature was 34.28 ℃, the skin moisture under the ultra-thin PDMS film was 47%, and the temperature was 34.4 ℃.
Example 4
The embodiment discloses a preparation method of flexible electronic skin with ventilation, moisture permeability and thermal regulation performance, which comprises the following specific preparation processes:
weighing 3-5 g of elastic polyolefin thermoplastic elastomer nanofiber, dispersing the nanofiber in 800-1000 mL of organic solvent diethyl ether by adopting ultra-high speed shearing action to obtain elastic nanofiber suspension, and then spraying 40-80 mL of elastic nanofiber suspension by utilizing a high-pressure airflow forming technology to prepare the elastic polyolefin copolymer nanofiber membrane with the thickness of 90 mu m.
The carbon nano tube material with electric conduction performance is coated or covered on the surface of the prepared nano fiber film according to the designed straight line shape by adopting physical coating, and the thickness of the obtained electric conduction coating is 75 mu m, namely the flexible electronic skin with air permeability, moisture permeability and thermal regulation performance is finally obtained, and the water vapor permeability of the flexible electronic skin is 2563g/m 2 D, after the flexible electronic skin and the ultra-thin PDMS film were respectively covered on the human skin (moisture 39%, temperature 33.8 ℃) for 15min, the skin moisture under the flexible electronic skin was 44%, the temperature was 34.34 ℃, the skin moisture under the ultra-thin PDMS film was 47%, and the temperature was 34.4 ℃.
Example 5
The embodiment discloses a preparation method of flexible electronic skin with ventilation, moisture permeability and thermal regulation performance, which comprises the following specific preparation processes:
weighing 3-5 g of elastic polyolefin thermoplastic elastomer nanofiber, dispersing the nanofiber in 800-1000 mL of organic solvent diethyl ether by adopting ultra-high speed shearing action to obtain elastic nanofiber suspension, and then spraying 40-80 mL of elastic nanofiber suspension by utilizing a high-pressure airflow forming technology to prepare the elastic polyolefin copolymer nanofiber membrane with the thickness of 100 mu m.
The graphene material with the conductivity is coated or coated on the surface of the prepared nanofiber membrane according to the designed square shape by adopting physical coating, and the nanofiber membrane is dried to obtain the conductive coating with the thickness of 80 mu m, namely the flexible electronic skin with the air permeability, the moisture permeability and the thermal regulation performance is finally obtained, and the water vapor transmittance of the flexible electronic skin is 2440g/m 2 D, after the flexible electronic skin and the ultra-thin PDMS film were respectively covered on the human skin (moisture 39%, temperature 33.8 ℃) for 15min, the skin moisture under the flexible electronic skin was 45%, the temperature was 34.36 ℃, the skin moisture under the ultra-thin PDMS film was 47%, and the temperature was 34.4 ℃.
Example 6
The embodiment discloses a preparation method of flexible electronic skin with ventilation, moisture permeability and thermal regulation performance, which comprises the following specific preparation processes:
weighing 3-5 g of elastic polyolefin thermoplastic elastomer nanofiber, dispersing the nanofiber in 800-1000 mL of organic solvent diethyl ether by adopting ultra-high speed shearing action to obtain elastic nanofiber suspension, and then spraying 40-80 mL of elastic nanofiber suspension by utilizing a high-pressure airflow forming technology to prepare the elastic polyolefin copolymer nanofiber membrane with the thickness of 120 mu m.
Coating or cladding the surface of the prepared nanofiber membrane with the conductive property according to the designed square shape by adopting vapor deposition, and drying to obtain the conductive coating with the thickness of 108 mu m, namely finally obtaining the flexible electronic skin with air permeability, moisture permeability and thermal regulation property, wherein the water vapor permeability of the flexible electronic skin is 2335g/m 2 D, after the flexible electronic skin and the ultrathin PDMS film were respectively covered on the human skin (moisture 39%, temperature 33.8 ℃) for 15min, the flexible electronic skin was underThe skin moisture of (a) was 46%, the temperature was 34.38 ℃, the skin moisture under an ultrathin PDMS film was 47%, and the temperature was 34.4 ℃.
According to the embodiment, the flexible electronic skin designed by the invention has good flexibility, ventilation, moisture permeability and thermal regulation performance on the basis of ensuring the excellent tension/pressure sensing performance, and has good application prospect in the intelligent wearing field due to the design mode that the conductive coating is not completely covered by the special three-dimensional porous structure, elasticity and infrared transmission performance of the polyolefin nanofiber membrane.
The above examples are only the best illustration and are not limiting of the embodiments of the invention. In addition to the embodiments described above, the present invention is also directed to other embodiments. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.
Claims (6)
1. A flexible electronic skin having breathable, moisture permeable and thermal regulating properties, characterized by: the nanofiber membrane is an elastic polyolefin copolymer nanofiber membrane with a porous structure; the specific shape consists of a closed line type or/and an unclosed line type; the flexible electronic skin has tension/pressure sensing performance, and the lowest detection tensile deformation lower limit is 0.05%: the diameter of the nanofiber of the elastic polyolefin copolymer nanofiber membrane is 500-700 nm, the pore size distribution is 50-750 nm, and the structure does not absorb middle infrared rays and has good permeability to infrared radiation in a human body; the three-dimensional porous structure ensures the permeation of water vapor on the surface of the skin of the human body, thereby endowing the flexible electronic skin with air permeability, moisture permeability and thermal regulation performance;
the preparation method of the elastic polyolefin copolymer nanofiber membrane comprises the following steps: weighing 3-5 g of elastic polyolefin thermoplastic elastomer nanofiber, dispersing the nanofiber in 800-1000 mL of organic solvent diethyl ether by adopting ultra-high speed shearing action to obtain elastic nanofiber suspension, and then spraying 40-80 mL of elastic nanofiber suspension by utilizing a high-pressure airflow forming technology to prepare the elastic polyolefin copolymer nanofiber membrane with the thickness of 30-150 mu m.
2. The flexible electronic skin with air, moisture and thermal regulating properties of claim 1, wherein: the closed line shape includes one of a circular ring shape, a circular shape, or a polygonal shape, and the non-closed line shape includes one of a linear shape, a curved shape, or a folded line shape.
3. The flexible electronic skin with air, moisture and thermal regulating properties of claim 1, wherein: the thickness of the conductive coating is 40-120 mu m.
4. A flexible electronic skin with air, moisture and thermal regulation properties according to any one of claims 1 to 3, characterized in that: the conductive coating is made of one of conductive silver paste, metal nanowires, carbon nanotubes or graphene.
5. A method for preparing the flexible electronic skin with air permeability, moisture permeability and thermal regulating performance according to claim 1, characterized in that: preparing an elastic polyolefin copolymer nanofiber membrane with the thickness of 30-150 mu m by adopting one of centrifugal spinning, electrostatic spinning, melt spinning or wet spinning, coating or cladding a conductive material on the surface of the elastic polyolefin copolymer nanofiber membrane according to a specific shape of an incomplete covering membrane surface, and drying to obtain flexible electronic skin with the conductive coating thickness of 40-120 mu m;
the preparation method of the elastic polyolefin copolymer nanofiber membrane comprises the following steps: weighing 3-5 g of elastic polyolefin thermoplastic elastomer nanofiber, dispersing the nanofiber in 800-1000 mL of organic solvent diethyl ether by adopting ultra-high speed shearing action to obtain elastic nanofiber suspension, and then spraying 40-80 mL of elastic nanofiber suspension by utilizing a high-pressure airflow forming technology to prepare the elastic polyolefin copolymer nanofiber membrane with the thickness of 30-150 mu m.
6. The method for preparing the flexible electronic skin with air permeability, moisture permeability and thermal regulating performance according to claim 5, wherein the method comprises the following steps: and coating or cladding the conductive material on the surface of the elastic polyolefin copolymer nanofiber membrane according to a specific shape which does not completely cover the membrane surface by adopting one of vapor deposition, magnetron sputtering, electroplating, physical coating or vacuum evaporation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983371.4A CN109029508B (en) | 2018-08-27 | 2018-08-27 | Flexible electronic skin with ventilation, moisture permeability and thermal regulation performance and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983371.4A CN109029508B (en) | 2018-08-27 | 2018-08-27 | Flexible electronic skin with ventilation, moisture permeability and thermal regulation performance and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109029508A CN109029508A (en) | 2018-12-18 |
| CN109029508B true CN109029508B (en) | 2023-05-23 |
Family
ID=64624701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810983371.4A Active CN109029508B (en) | 2018-08-27 | 2018-08-27 | Flexible electronic skin with ventilation, moisture permeability and thermal regulation performance and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109029508B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565176B (en) * | 2019-06-04 | 2021-06-15 | 中国科学院苏州纳米技术与纳米仿生研究所 | Temperature-adjustable fabric based on carbon nano tube and preparation method thereof |
| CN111430062B (en) * | 2020-04-03 | 2024-04-30 | 香港理工大学 | Elastic conductor composite film and preparation method thereof |
| CN113997663B (en) * | 2021-10-30 | 2022-08-26 | 苏州大学 | Flexible electrode with moisture absorption, sweat releasing, ventilation and antibacterial functions and preparation method and application thereof |
| CN114250547B (en) * | 2021-12-24 | 2023-01-13 | 济南大学 | Flexible airflow sensing material, sensor and preparation method thereof |
| CN114855328A (en) * | 2022-05-26 | 2022-08-05 | 之江实验室 | Breathable stretchable conductive yarn and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099784A (en) * | 2014-07-03 | 2014-10-15 | 武汉纺织大学 | Preparation method for high-activity polymer nanofiber material adopting micro-nano pore structure |
| CN105442319A (en) * | 2015-12-07 | 2016-03-30 | 武汉纺织大学 | Preparation method of nanofiber membrane material with surface fixedly provided with three-dimensional flower-shaped structure protein |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884695B (en) * | 2012-12-21 | 2016-07-13 | 武汉纺织大学 | A kind of nanofiber film sensors with quickly detection antibacterial function and preparation method thereof |
| US9818018B2 (en) * | 2014-07-22 | 2017-11-14 | Nanotek Instruments, Inc. | Flexible fingerprint sensor materials and processes |
| KR101926473B1 (en) * | 2015-08-21 | 2018-12-10 | 주식회사 아모그린텍 | Wearable flexible printed circuit board and wearable smart device |
| KR102543985B1 (en) * | 2015-10-27 | 2023-06-14 | 삼성전자주식회사 | Conductive films and electronic decives including the same |
| CN106811815B (en) * | 2015-12-02 | 2020-01-31 | 中国科学院化学研究所 | porous polyolefin fibers containing micro-nano holes and preparation method and application thereof |
| CN206132280U (en) * | 2016-10-08 | 2017-04-26 | 中国科学院深圳先进技术研究院 | Flexible pressure sensor |
| CN108303145A (en) * | 2018-04-03 | 2018-07-20 | 青岛大学 | A kind of single electrode transparent flexible electronic skin and preparation method thereof |
-
2018
- 2018-08-27 CN CN201810983371.4A patent/CN109029508B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099784A (en) * | 2014-07-03 | 2014-10-15 | 武汉纺织大学 | Preparation method for high-activity polymer nanofiber material adopting micro-nano pore structure |
| CN105442319A (en) * | 2015-12-07 | 2016-03-30 | 武汉纺织大学 | Preparation method of nanofiber membrane material with surface fixedly provided with three-dimensional flower-shaped structure protein |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109029508A (en) | 2018-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109029508B (en) | Flexible electronic skin with ventilation, moisture permeability and thermal regulation performance and preparation method thereof | |
| Hassan et al. | Significance of flexible substrates for wearable and implantable devices: recent advances and perspectives | |
| Liu et al. | Nanofiber‐reinforced silver nanowires network as a robust, ultrathin, and conformable epidermal electrode for ambulatory monitoring of physiological signals | |
| CN111636195B (en) | Layer-by-layer self-assembly composite conductive fiber bundle and preparation method thereof | |
| CN112680967B (en) | Piezoresistive sensing fabric with unidirectional moisture-conducting function and preparation method thereof | |
| Zheng et al. | MXene functionalized, highly breathable and sensitive pressure sensors with multi‐layered porous structure | |
| Blachowicz et al. | Conductive electrospun nanofiber mats | |
| Li et al. | Advances in electrospun nanofibers for triboelectric nanogenerators | |
| Cui et al. | Highly stretchable, electrically conductive textiles fabricated from silver nanowires and cupro fabrics using a simple dipping-drying method | |
| CN109323781A (en) | A method of preparing flexible self energizing integrated pressure sensor array | |
| CN109355715A (en) | A kind of stretchable multimodal sensor and preparation method thereof based on nanofiber covering yarn | |
| CN112226899A (en) | Flexible electronic skin and preparation method thereof | |
| Sun et al. | Advanced functional composite materials toward E‐skin for health monitoring and artificial intelligence | |
| CN109239139B (en) | Yarn-shaped humidity sensor | |
| CN113916416B (en) | High-permeability strain non-sensitive electronic skin and preparation method thereof | |
| WO2018203182A1 (en) | Cartridge electrospinning system | |
| Zhou et al. | A flexible sandwich-structured supercapacitor with poly (vinyl alcohol)/H 3 PO 4-soaked cotton fabric as solid electrolyte, separator and supporting layer | |
| Li et al. | Ultrathin breathable and stretchable electronics based on patterned nanofiber composite network | |
| Das et al. | Recent progress in electrospun nanomaterials for wearables | |
| CN114076785A (en) | Sensor based on MXene/silk fibroin material and preparation method and application thereof | |
| JP5680733B2 (en) | Input finger sack for touch panel | |
| CN113418645B (en) | Composite flexible three-dimensional force sensor based on ferromagnetic nanowire/carbon material and preparation method thereof | |
| CN113776709A (en) | Dual-mode flexible touch sensor and preparation method and application thereof | |
| CN113447172A (en) | Wearable pressure sensor based on natural veins and manufacturing method | |
| CN111535024A (en) | Non-woven fabric with sweat ultra-fast evaporation and one-way moisture permeability 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 |