CN117059299A - Flexible conductive material suitable for high stretching durability, preparation method and application - Google Patents
Flexible conductive material suitable for high stretching durability, preparation method and application Download PDFInfo
- Publication number
- CN117059299A CN117059299A CN202311131815.9A CN202311131815A CN117059299A CN 117059299 A CN117059299 A CN 117059299A CN 202311131815 A CN202311131815 A CN 202311131815A CN 117059299 A CN117059299 A CN 117059299A
- Authority
- CN
- China
- Prior art keywords
- conductive material
- material suitable
- flexible conductive
- flexible
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004020 conductor Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 27
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 11
- 229920001971 elastomer Polymers 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 239000011159 matrix material Substances 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 7
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 7
- 239000000806 elastomer Substances 0.000 claims abstract description 7
- 238000007639 printing Methods 0.000 claims abstract description 5
- 230000000996 additive effect Effects 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 69
- 239000012530 fluid Substances 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 16
- 229910052733 gallium Inorganic materials 0.000 claims description 16
- 239000003963 antioxidant agent Substances 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 12
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 12
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 12
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000005642 Oleic acid Substances 0.000 claims description 12
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 12
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 229910005538 GaSn Inorganic materials 0.000 claims description 6
- 239000003431 cross linking reagent Substances 0.000 claims description 6
- 229920001973 fluoroelastomer Polymers 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 claims description 4
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 2
- 229910000807 Ga alloy Inorganic materials 0.000 claims description 2
- 235000021314 Palmitic acid Nutrition 0.000 claims description 2
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 2
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002318 adhesion promoter Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052787 antimony Inorganic materials 0.000 claims description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000007822 coupling agent Substances 0.000 claims description 2
- 239000002270 dispersing agent Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 239000003063 flame retardant Substances 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 229910052732 germanium Inorganic materials 0.000 claims description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 235000021313 oleic acid Nutrition 0.000 claims description 2
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- 229910052716 thallium Inorganic materials 0.000 claims description 2
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000000080 wetting agent Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 238000005406 washing Methods 0.000 abstract description 33
- 230000008569 process Effects 0.000 abstract description 10
- 230000010354 integration Effects 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 3
- 239000004753 textile Substances 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 239000000428 dust Substances 0.000 abstract description 2
- 239000012776 electronic material Substances 0.000 abstract description 2
- 239000002105 nanoparticle Substances 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 description 22
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 21
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 20
- 239000004744 fabric Substances 0.000 description 19
- 239000000758 substrate Substances 0.000 description 15
- 238000009864 tensile test Methods 0.000 description 15
- 238000012360 testing method Methods 0.000 description 14
- 238000005259 measurement Methods 0.000 description 13
- 230000003078 antioxidant effect Effects 0.000 description 12
- 229920000742 Cotton Polymers 0.000 description 11
- 230000003647 oxidation Effects 0.000 description 11
- 238000007254 oxidation reaction Methods 0.000 description 11
- 229910000846 In alloy Inorganic materials 0.000 description 10
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 10
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 10
- 239000003638 chemical reducing agent Substances 0.000 description 10
- 230000005496 eutectics Effects 0.000 description 10
- 229920000728 polyester Polymers 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000036541 health Effects 0.000 description 6
- 239000004005 microsphere Substances 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000007731 hot pressing Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910021607 Silver chloride Inorganic materials 0.000 description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 description 3
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000017 hydrogel Substances 0.000 description 3
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 3
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 3
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 3
- 206010063385 Intellectualisation Diseases 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- PTTPXKJBFFKCEK-UHFFFAOYSA-N 2-Methyl-4-heptanone Chemical compound CC(C)CC(=O)CC(C)C PTTPXKJBFFKCEK-UHFFFAOYSA-N 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 206010040880 Skin irritation Diseases 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000000386 athletic effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004177 elastic tissue Anatomy 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the technical field of electronic materials, and particularly relates to a flexible conductive material suitable for high stretching durability, a preparation method and application, wherein the flexible conductive material is prepared from the following raw materials: 5 to 35 weight percent of liquid metal, 30 to 75 weight percent of conductive particles or carbon materials, 5 to 30 weight percent of elastomer matrix and 0.1 to 5 weight percent of additive. Compared with the prior art, the flexible conductive material suitable for high stretching durability has the characteristics of low resistivity, excellent repeated stretching performance, repeated machine washing resistance and the like. Secondly, the preparation method is mature, almost no dust, particularly nano particles, are in risk of diffusion in the preparation process, and the preparation method has the characteristics of high efficiency and low cost, and can realize large-scale production; finally, the present invention allows for the preparation of complex circuits and electrodes using processes such as printing, dispensing, and coating, and the integration into flexible wearable electronics and textile products using existing garment forming processes.
Description
Technical Field
The invention belongs to the technical field of electronic materials, and particularly relates to a flexible conductive material suitable for high stretching durability, a preparation method and application.
Background
With the advancement of society and the development of technology, miniaturization, mobility and intellectualization of health monitoring and medical devices have become a trend. Among them, the intellectualization and the wearable of the equipment such as the electrocardio monitoring, the myoelectricity measurement and the feedback, the electroencephalogram measurement, and the like which are closely related to the health of the human body are receiving more and more attention. With the popularization of remote health monitoring concepts in recent years and the recent masquery of respiratory tract infectious viruses, people pay more attention to self health, and the demand for having wearable flexible electronic products capable of performing remote health monitoring and medical diagnosis is more urgent. Therefore, the traditional circuit electrode and the clothing fabric are integrated, so that the traditional fabric is endowed with more functional exploration and corresponding product development.
Flexible conductive materials are considered to be key core materials for flexible electronics and wearable garments due to their stretchable, bendable properties. The method is mainly used for manufacturing flexible circuits and flexible electrodes and plays roles of receiving electric signals and conducting the electric signals. There have been some reports on the use of novel flexible conductive materials for flexible wearable electronics. The traditional flexible conductive material is prepared by adding metal and carbon conductive particles into PDMS or TPU, then the resistance of most materials is rapidly increased along with the increase of stretching deformation, the resistance is already more than 100 ohms at the stretching ratio of 30%, and the reliability of water washing is not experimental data. Furthermore, dupont US20190292383A1 patent application reports a stretchable, water washable printed conductive paste with a resistance approaching 100 ohms at 40% stretch, but already exceeding 500 ohms when it is pulled up by more than 60%. Dupont also introduced a range of commercial products with the brand name "inter" in 2018 and was successfully applied to heating apparel, heart rate monitoring athletic apparel, electrocardiographic monitoring apparel, and the like.
According to literature reports, the stretching behavior of human skin is generally within 20%, the stretching deformation of the joint parts of limbs is about 60%, the stretching proportion is beyond the long-term use range of conventional flexible conductive materials, and the research of liquid metal as a flexible circuit for wearable application is increasing. The liquid metal commonly used today is generally an alloy material of gallium Ga, indium In, and other metals, because its melting point can be adjusted at normal temperature and below and is In a liquid state at normal temperature, and is therefore called a liquid metal. Gallium Ga is then extremely easily oxidized and the oxide layer formed is dense and insulating, thus requiring special handling when liquid metal is used to fabricate flexible circuits. As reported in the review of Frontiers in Materials in 2019, there are several references to wire lines made of liquid PDMS encapsulated liquid metal to prevent oxidation and wear of the liquid metal. The implementation of the packaging process then requires either special tooling or relatively complex process flows, which limit to some extent the use of liquid metal to fabricate flexible circuits.
In recent years, there are also a plurality of documents reporting that the stretchable flexible conductive material is prepared by forming microspheres from liquid metal by ultrasonic technology and adding surfactant or reactive monomer in the solution in advance to form the microspheres of "antioxidation layer-liquid metal" having a core-shell structure, separating the microspheres by centrifugal sedimentation, and adding the microspheres into PDMS. The flexible conductive material prepared by the method can resist repeated stretching, and even if the stretching ratio is 60%, the conductive resistance performance is still good. However, the complicated operation steps not only increase the manufacturing cost of the liquid metal microspheres, but also limit the wide application of the liquid metal microspheres.
In the manufacturing and application of the flexible electrode, the Ag/AgCl electrode, the metal fixture electrode, the sucker electrode and the hydrogel electrode patch which are widely used in clinical medical treatment, and the conductive rubber and conductive yarn fabric used in the health care field have a plurality of problems which are difficult to overcome in the realization of the wearable of equipment.
The Ag/AgCl electrode and the metal clamp electrode are generally matched with disposable conductive paste or conductive liquid in the use process to reduce the contact resistance with human skin so as to obtain accurate and reliable electric signals. Wearable applications of electronic devices are then difficult to implement because of the difficulty in volume reduction and discomfort of the conductive paste or conductive liquid. The suction cup type electrode is also difficult to realize further reduction of the volume due to the design of the vacuum cavity. In order to keep the elasticity of the material, the body resistance of the conductive rubber is generally too high, and meanwhile, the conductive rubber has poor affinity with human skin, so that higher interface resistance is generated, and finally, the accuracy and stability of electric signal acquisition are affected. Conductive yarn fabrics and hydrogel electrodes are the two materials currently considered most likely to be employed on flexible electronic and wearable fabrics. However, the conductive yarn fabrics have the problems of excessively high contact resistance and high cost for cutting complex circuits, and the hydrogel patch electrodes have the problems of greatly reduced viscosity and conductivity after multiple uses and skin irritation after long-term wearing, so that the flexibility and the wearing of the circuit electrodes are really realized. There have been some reports on the use of novel flexible conductive materials for flexible electrode fabrication. For example, chinese patent CN216854686U reports a multilayer flexible electrode that is vegetation by screen printing technology from AgCl and graphene conductive paste, and its application on electrocardiographic patches. Chinese patent CN116024696a discloses a method for preparing an MXene/TPU conductive fiber and a method for preparing a pda@mxene/TPU elastic fiber electrode therefrom. Chinese patent CN113611437a reports a method for preparing a fully transparent thin film electrode prepared by blending a water-soluble polymer as a dopant with a conductive polymer. However, these reports have not been effective in providing a conductive material with repeated stretching and changes in conductivity after multiple machine washes and a threshold of resistance for conductive materials useful in flexible wearable electronic applications.
Therefore, we propose a flexible conductive material suitable for high tensile durability, a preparation method and application to solve the above problems.
Disclosure of Invention
Aiming at the defects and potential problems in the prior art, the invention aims to provide a composition, a preparation method and potential application of a flexible conductive material which has high repeated stretching ratio and can resist repeated washing. The flexible conductive material has the characteristics of low resistivity, excellent repeated stretching performance, repeated machine washing resistance and the like. The flexible conductive material can be used to prepare complex circuits and electrodes by processes such as printing, dispensing, and coating according to specific needs, and is integrated into flexible wearable electronic and textile products using existing garment forming processes. The preparation process and the clothing integration process of the flexible conductive material have the characteristics of high efficiency and low cost, and can realize large-scale production.
In order to achieve one of the above purposes, the present invention adopts the following technical scheme:
a flexible conductive material suitable for high tensile durability is prepared from the following raw materials:
5 to 35 weight percent of liquid metal, 30 to 75 weight percent of conductive particles or carbon materials, 5 to 30 weight percent of elastomer matrix and 0.1 to 5 weight percent of additive.
Preferably, the liquid metal is gallium, or gallium indium tin alloy, or an alloy of gallium indium tin and aluminum, thallium, lead, bismuth, zinc, copper, germanium, antimony, and the melting point of the liquid metal is below 40 degrees.
Preferably, the liquid metal is Ga 75.5 In 24.5 、Ga 62.5 In 21.5 Sn 16 、Bi 35 In 48.6 Sn 16 Zn 0.4 、GaIn 15 Sn 13 Zn 1 、GaSn 60 In 10 、GaZn 16 In 12 、Ga75In25、GaZn 16 In 12 、GaSn 8 、GaIn 25 Sn 13 、Ga 69.8 In 17.6 Sn 12.6 、GaIn 29 Zn 4 、GaSn 12 、GaZn 5 And the like.
Preferably, the conductive particles are Au, ag, ni, cu, al, zn, sn, ti, bi, pb, W, in, ga and conductive particles of an alloy of two or more thereof;
the carbon material is carbon powder, graphite powder, graphene powder, nano graphite sheet, carbon fiber powder and carbon powder composite powder of two or more of the carbon powder and the nano graphite sheet.
Preferably, the Ag is flake silver powder with bulk density not less than 3.0g/cm 3 And a specific surface area of not more than 2.0m 3 /g，D50/D10>1.8 and D90/D10>4。
Preferably, the surface of the plate-like silver powder contains a chemical coating, and the compound constituting the chemical coating is selected from oleic acid, palmitic acid, stearic acid, sodium oleate, sodium stearate, and combinations of two or more thereof.
Preferably, the elastomeric matrix comprises at least two vinylidene fluoride containing fluoroelastomers having different fluorine content, the fluoroelastomers being crosslinked using a crosslinking agent.
Preferably, the additive is a cross-linking agent, co-cross-linking agent, coupling agent, catalyst, antioxidant, co-binder, defoamer, wetting agent, flame retardant, adhesion promoter, filler, dispersant, surfactant, and combinations of two or more thereof.
In order to achieve the second purpose, the invention adopts the following technical scheme:
a method of preparing a flexible conductive material suitable for high stretch durability comprising the steps of:
step S100: stirring the elastomer matrix and the solvent at normal temperature until the elastomer matrix and the solvent are uniformly mixed;
step S200: sequentially adding liquid metal, conductive particles or carbon materials and additives, and continuously stirring until a uniform fluid mixture is obtained;
step S300: taking out the fluid mixture, repeatedly grinding the fluid mixture by using a high-speed mixer, and collecting the ground liquid mixture;
step S400: the liquid mixture is coated on the base material in a printing, dispensing or coating mode, and is placed in an oven for baking, so that the flexible conductive material suitable for high stretching durability is obtained.
In order to achieve the third purpose, the invention adopts the following technical scheme:
a flexible conductive material suitable for high-tensile durability is used as a flexible electronic product, a wearable garment, a flexible circuit and a flexible electrode.
The flexible conductive material suitable for high stretching durability has the characteristics of low resistivity, excellent repeated stretching performance, repeated machine washing resistance and the like. Secondly, the preparation method is mature, almost no dust, particularly nano particles, are in risk of diffusion in the preparation process, and the preparation method has the characteristics of high efficiency and low cost, and can realize large-scale production; finally, the present invention allows for the preparation of complex circuits and electrodes using processes such as printing, dispensing, and coating, and the integration into flexible wearable electronics and textile products using existing garment forming processes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a stretched flexible conductive material.
Fig. 2 is a sample of flexible conductive material pressed onto a polyester cloth (example 1).
Fig. 3 is a schematic cross-sectional view of a sample of flexible conductive material pressed onto a polyester cloth.
Fig. 4 is a graph showing the change in tensile resistance of a sample of flexible conductive material (example 3) pressed onto a polyester cloth.
Fig. 5 is a comparison of the samples of flexible conductive material pressed onto polyester cloth (example 4) before and after water washing.
Detailed Description
The composition and preparation scheme of the flexible conductive material according to the present invention will be described in detail by way of examples. Those skilled in the art will understand that the following examples are provided for illustration only and should not be construed as limiting the scope of the invention. The specific conditions are not noted in the examples, and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without any manufacturer's knowledge.
The tensile and water-washability of examples 1-6 and comparative examples 1-4 were compared, and the technical effects were verified.
Table 1 sample composition ratios of examples and comparative examples
Example 1
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of methyl isobutyl ketone were added and slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. Then 75 g of silver powder was added, the surface of the silver powder was treated with oleic acid, and D50 was 2.5-5.5. Mu.m. Then 5 g of EGaIn eutectic gallium indium alloy Ga with the melting point of 15.7 ℃ is added 75.5 In 24.5 EGaIn is stored submerged in an aqueous solution containing a water-soluble reducing agent prior to use to avoid oxidation by air. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-velocity dispersed liquid mixture is then collected and contained in a closable container for use.
I-shaped sample resistance measurement: a proper amount of liquid mixture is taken, an I-shaped sample with the length of 80mm, the width of 8mm and the thickness of 12+/-2 mu m is printed on a TPU substrate, and the sample is put into an oven for baking at 130 ℃ for 15 minutes until the sample is completely solidified. Subsequently, at 130℃an I-shaped sample based on TPU was hot-pressed onto a 15cm long by 30mm wide elastic cloth substrate consisting of a blend of 25% cotton and 75% polyester using 0.6kgf and continued hot-pressing for 30 s. The resistance of the sample was then measured and recorded using a multimeter according to the position of the ends of the i-shaped sample as described in fig. 3. The data can be seen in table 2.
60％Tensile testing: a proper amount of liquid mixture is taken, an I-shaped sample with the length of 80mm, the width of 8mm and the thickness of 12+/-2 mu m is printed on a Thermoplastic Polyurethane (TPU) substrate with the thickness of 50 mu m, and the sample is put into an oven for baking at 130 ℃ for 15 minutes until the sample is completely solidified. Subsequently, an I-shaped sample based on TPU was hot-pressed onto a substrate of an elastic cloth consisting of 25% cotton and 75% having a length of 15cm and a width of 30mm at 130℃using 0.6kgf and continuously hot-pressed for 30sPolyester blending. And then fixing the sample on a metal clamp of a self-made tensile resistance testing instrument, wherein the fixing position of the clamp is the end position of the I-shaped sample. The speed of stretching and recovering was set to 508mm/min, the number of stretching cycles was 100 times, the stretching ratio was 60%, and the resistance change data during stretching recovery was recorded in real time at a frequency of 6 data/sec. The initial resistance of the i-shaped sample, the resistance at 60% draw ratio at 100 cycles, and the recovery resistance at 100 cycles were selected for recording and the device count was 200. The data can be seen in table 2.
Washing test: a suitable amount of the liquid mixture was taken, an I-shaped sample of 80mm length, 8mm width and 12.+ -. 2 μm thickness was printed on a Thermoplastic Polyurethane (TPU) substrate of 50 μm thickness, and placed in an oven for 15 minutes at 130 ℃ until complete curing. An I-shaped sample with TPU as a substrate was hot-pressed on an elastic cloth substrate 15cm long and 30mm wide, which consists of 25% cotton and 75% polyester blended, using 0.6kgf at 130℃and continuously hot-pressed for 30 s. After the sample cooled to room temperature, the resistance of the sample was measured and recorded as the initial resistance-wash according to the I-shaped sample tip position described in FIG. 3. The sample was then placed in a drum washing machine along with 2kg of co-washed cotton cloth (100% cotton). Subsequently, 55L of water and 16g of washing powder were added and single washing conditions were set: the washing time is 15min, the washing process comprises washing, rinsing and spin-drying, and the washing temperature is normal temperature. After repeated washing for 25 times under the same conditions, the sample was taken out, hung vertically at room temperature for 12 hours, dried, and the resistance of the sample was measured and recorded according to the position of the I-shaped sample end as shown in FIG. 3. The data can be seen in table 2.
Example 2
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of methyl isobutyl ketone were added and slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. 64 g of silver powder was then added, the surface of which was treated with oleic acid and the D50 was 2.5-5.5. Mu.m. Then 16g of EGaIn eutectic gallium indium alloy Ga with the melting point of 15.7 ℃ is added 75.5 In 24.5 Immersion storage of EGaIn prior to useIn an aqueous solution of a water-soluble reducing agent to avoid oxidation by air. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-velocity dispersed liquid mixture is then collected and contained in a closable container for use.
I-shaped sample resistance measurement: as in example 1.
60％Tensile testing: as in example 1.
100％Tensile test:a proper amount of liquid mixture is taken, an I-shaped sample with the length of 80mm, the width of 8mm and the thickness of 12+/-2 mu m is printed on a Thermoplastic Polyurethane (TPU) substrate with the thickness of 50 mu m, and the sample is put into an oven for baking at 130 ℃ for 15 minutes until the sample is completely solidified. Subsequently, at 130℃an I-shaped sample based on TPU was hot-pressed onto a 15cm long by 30mm wide elastic cloth substrate consisting of a blend of 25% cotton and 75% polyester using 0.6kgf and continued hot-pressing for 30 s. And then fixing the sample on a metal clamp of a self-made tensile resistance testing instrument, wherein the fixing position of the clamp is the end position of the I-shaped sample. The speed of stretching and recovering is set to 508mm/min, the number of stretching cycles is 100 times, the stretching ratio is 100%, and the resistance change data in the stretching and recovering process is recorded in real time at the frequency of 6 data/sec. The initial resistance of the i-shaped sample, the resistance at 100% draw ratio at 100 cycles, and the recovery resistance at 100 cycles were selected for recording and the device count was 200. The data can be seen in table 3.
Washing test: as in example 1.
Example 3
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of methyl isobutyl ketone were added and slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. 60 g of silver powder was then added, the surface of which was treated with oleic acid and the D50 was 2.5-5.5. Mu.m. Then 20 g of EGaIn eutectic gallium indium alloy Ga with the melting point of 15.7 ℃ is added 75.5 In 24.5 EGaIn is stored submerged in an aqueous solution containing a water-soluble reducing agent prior to use to avoid oxidation by air. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-velocity dispersed liquid mixture is then collected and contained in a closable container for use.
I-shaped sample resistance measurement: as in example 1.
60％Tensile testing: as in example 1.
100％Tensile testing: as in example 2.
Washing test: as in example 1.
Example 4
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of methyl isobutyl ketone were added and slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. 53 g of silver powder was then added, the surface of which was treated with oleic acid and the D50 was 2.5-5.5. Mu.m. Then 27 g of EGaIn eutectic gallium indium alloy Ga with the melting point of 15.7 ℃ is added 75.5 In 24.5 EGaIn is stored submerged in an aqueous solution containing a water-soluble reducing agent prior to use to avoid oxidation by air. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-velocity dispersed liquid mixture is then collected and contained in a closable container for use.
Conductive particle distribution: and preparing a scanning electron microscope sample for observing the section by using the solidified long strip sample through a cold inlay polishing method. Magnification is 2000 times, see figure 1. The scale bar in FIG. 1 is 10. Mu.m.
I-shaped sample resistance measurement: as in example 1.
60％Tensile testing: as in example 1.
100％Tensile testing: as in example 2.
Washing test: as in example 1.
Example 5
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of methyl isobutyl ketone were added and slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. Then 50 g of silver powder was added, the surface of the silver powder was treated with oleic acid, and D50 was 2.5-5.5. Mu.m. Then 30 g of EGaIn eutectic gallium indium alloy Ga with the melting point of 15.7 ℃ is added 75.5 In 24.5 EGaIn is stored submerged in an aqueous solution containing a water-soluble reducing agent prior to use to avoid oxidation by air. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-velocity dispersed liquid mixture is then collected and contained in a closable container for use.
I-shaped sample resistance measurement: as in example 1.
60％Tensile testing: as in example 1.
100％Tensile testing: as in example 2.
Washing test: as in example 1.
Example 6
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of methyl isobutyl ketone were added and slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. 45 g of silver powder was then added, the surface of which was treated with oleic acid and the D50 was 2.5-5.5. Mu.m. Then 35 g of EGaIn eutectic gallium indium alloy Ga with the melting point of 15.7 ℃ is added 75.5 In 24.5 Immersion preservation of EGaIn prior to useIn an aqueous solution containing a water-soluble reducing agent to avoid oxidation by air. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-velocity dispersed liquid mixture is then collected and contained in a closable container for use.
I-shaped sample resistance measurement: as in example 1.
Tensile testing: as in example 1.
Washing test: as in example 1.
Comparative example 1
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of methyl isobutyl ketone were added and slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. Then 80 g of silver powder is added, the surface of the silver powder is treated by oleic acid, and D50 is 2.5-5.5 mu m. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-velocity dispersed liquid mixture is then collected and contained in a closable container for use.
I-shaped sample resistance measurement: a proper amount of liquid mixture is taken, an I-shaped sample with the length of 80mm, the width of 8mm and the thickness of 12+/-2 mu m is printed on a TPU substrate, and the sample is put into an oven for baking at 130 ℃ for 15 minutes until the sample is completely solidified. Subsequently, at 130℃an I-shaped sample based on TPU was hot-pressed onto a 15cm long by 30mm wide elastic cloth substrate consisting of a blend of 25% cotton and 75% polyester using 0.6kgf and continued hot-pressing for 30 s. The resistance of the sample was then measured and recorded using a multimeter according to the position of the ends of the i-shaped sample as described in fig. 3. The data can be seen in table 2.
Tensile testing: an appropriate amount of the liquid mixture was taken in a mixture of thermoplastic polyurethane (T)PU) substrate, an i-shaped sample with a length of 80mm, a width of 8mm and a thickness of 12 + -2 μm was printed, and baked in an oven at 130 ℃ for 15 minutes until complete curing. Subsequently, at 130℃an I-shaped sample based on TPU was hot-pressed onto a 15cm long by 30mm wide elastic cloth substrate consisting of a blend of 25% cotton and 75% polyester using 0.6kgf and continued hot-pressing for 30 s. And then fixing the sample on a metal clamp of a self-made tensile resistance testing instrument, wherein the fixing position of the clamp is the end position of the I-shaped sample. The speed of stretching and recovering was set to 508mm/min, the number of stretching cycles was 100 times, the stretching ratio was 60%, and the resistance change data during stretching recovery was recorded in real time at a frequency of 6 data/sec. The initial resistance of the i-shaped sample, the resistance at 60% draw ratio at 100 cycles, and the recovery resistance at 100 cycles were selected for recording and the device count was 200. The data can be seen in table 2.
Washing test: a suitable amount of the liquid mixture was taken, an I-shaped sample of 80mm length, 8mm width and 12.+ -. 2 μm thickness was printed on a Thermoplastic Polyurethane (TPU) substrate of 50 μm thickness, and placed in an oven for 15 minutes at 130 ℃ until complete curing. At 130v, an I-shaped sample based on TPU was hot-pressed onto a 15cm long by 30mm wide elastic cloth substrate composed of 25% cotton and 75% polyester blend, using 0.6kgf and continuing the hot-pressing for 30 s. After the sample cooled to room temperature, the resistance of the sample was measured and recorded as the initial resistance-wash according to the I-shaped sample tip position described in FIG. 3. The sample was then placed in a drum washing machine along with 2kg of co-washed cotton cloth (100% cotton). Subsequently, 55L of water and 16g of washing powder were added and single washing conditions were set: the washing time is 15min, the washing process comprises washing, rinsing and spin-drying, and the washing temperature is normal temperature. After repeated washing for 25 times under the same conditions, the sample was taken out, hung vertically at room temperature for 12 hours, dried, and the resistance of the sample was measured and recorded according to the position of the I-shaped sample end as shown in FIG. 3. The data can be seen in table 2.
Comparative example 2
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of armor is addedThe isobutyl ketone was slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. 77 g of silver powder were then added, the surface of which was treated with oleic acid and the D50 was 2.5-5.5. Mu.m. Then 3 g of EGaIn eutectic gallium indium alloy Ga with the melting point of 15.7 ℃ is added 75.5 In 24.5 EGaIn is stored submerged in an aqueous solution containing a water-soluble reducing agent prior to use to avoid oxidation by air. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-velocity dispersed liquid mixture is then collected and contained in a closable container for use.
I-shaped sample resistance measurement: as in comparative example 1.
Tensile testing: as in comparative example 1.
Washing test: as in comparative example 1.
Comparative example 3
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of methyl isobutyl ketone were added and slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. 40 g of silver powder was then added, the surface of which was treated with oleic acid and D50 was 2.5-5.5. Mu.m. Then 40 g of EGaIn eutectic gallium indium alloy Ga with the melting point of 15.7 ℃ is added 75.5 In 24.5 EGaIn is stored submerged in an aqueous solution containing a water-soluble reducing agent prior to use to avoid oxidation by air. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-velocity dispersed liquid mixture is then collected and contained in a closable container for use.
I-shaped sample resistance measurement: as in comparative example 1.
Tensile testing: as in comparative example 1.
Washing test: as in comparative example 1.
Comparative example 4
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of methyl isobutyl ketone were added and slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. Then 27 g of silver powder was added, the surface of which was treated with oleic acid and the D50 was 2.5-5.5. Mu.m. 53 g of EGaIn eutectic gallium indium alloy Ga with a melting point of 15.7 ℃ are then added 75.5 In 24.5 EGaIn is stored submerged in an aqueous solution containing a water-soluble reducing agent prior to use to avoid oxidation by air. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-velocity dispersed liquid mixture is then collected and contained in a closable container for use.
I-shaped sample resistance measurement: as in comparative example 1.
Tensile testing: as in comparative example 1.
Washing test: as in comparative example 1.
Comparative example 5
Sample preparation: a total of 20 grams of FKM246 and Viton-F was weighed out, with FKM246 having an F% weight content of 64.5% and Viton-F having an F% weight content of 70%. 50 g of methyl isobutyl ketone were added and slowly stirred mechanically for 12 hours to obtain a homogeneous and stable fluid mixture. Then 80 g of EGaIn eutectic gallium indium alloy Ga with the melting point of 15.7 ℃ is added 75.5 In 24.5 EGaIn is stored submerged in an aqueous solution containing a water-soluble reducing agent prior to use to avoid oxidation by air. Then adding a proper amount of curing agent, auxiliary curing agent, antioxidant, tackifier and the like, and continuously stirring for 2 hours to obtain a uniform and stable fluid mixture. The fluid mixture obtained by stirring was subjected to high-speed dispersion for 60 seconds using a high-speed dispersion apparatus. The high-speed dispersed liquid is then mixedThe materials are collected and contained in a container which can be closed for later use.
I-shaped sample resistance measurement: as in comparative example 1.
Tensile testing: as in comparative example 1.
Washing test: as in comparative example 1.
Table 2 comparison of tensile and water wash performance of examples and comparative examples
Table 3 example stretched 100% resistance extremum
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Claims (10)
1. The flexible conductive material suitable for high-tensile durability is characterized by being prepared from the following raw materials:
5 to 35 weight percent of liquid metal, 30 to 75 weight percent of conductive particles or carbon materials, 5 to 30 weight percent of elastomer matrix and 0.1 to 5 weight percent of additive.
2. A flexible conductive material suitable for high tensile durability according to claim 1 wherein said liquid metal is gallium, or gallium indium tin alloy, or an alloy of gallium indium tin and aluminum, thallium, lead, bismuth, zinc, copper, germanium, antimony, and said liquid metal has a melting point below 40 degrees.
3. A flexible conductive material suitable for high tensile durability according to claim 2 wherein said liquid metal is Ga 75.5 In 24.5 、Ga 62.5 In 21.5 Sn 16 、Bi 35 In 48.6 Sn 16 Zn 0.4 、GaIn 15 Sn 13 Zn 1 、GaSn 60 In 10 、GaZn 16 In 12 、Ga75 In25、GaZn 16 In 12 、GaSn 8 、GaIn 25 Sn 13 、Ga 69.8 In 17.6 Sn 12.6 、GaIn 29 Zn 4 、GaSn 12 、GaZn 5 One of them.
4. A flexible conductive material suitable for high tensile durability according to claim 1 wherein said conductive particles are Au, ag, ni, cu, al, zn, sn, ti, bi, pb, W, in, ga and conductive particles of alloys of two or more thereof;
the carbon material is carbon powder, graphite powder, graphene powder, nano graphite sheet, carbon fiber powder and carbon powder composite powder of two or more of the carbon powder and the nano graphite sheet.
5. The flexible conductive material suitable for high tensile durability according to claim 4, wherein said Ag is silver flake having a bulk density of not less than 3.0g/cm 3 And a specific surface area of not more than 2.0m 3 /g，D50/D10>1.8 and D90/D10>4。
6. The flexible conductive material suitable for high-tensile durability according to claim 5 wherein the surface of the plate-like silver powder contains a chemical coating, and the compound constituting the chemical coating is selected from the group consisting of oleic acid, palmitic acid, stearic acid, sodium oleate, sodium stearate, and combinations of two or more thereof.
7. A flexible conductive material suitable for high tensile durability according to claim 1 wherein said elastomeric matrix comprises at least two vinylidene fluoride containing fluoroelastomers having different fluorine content, said fluoroelastomers being crosslinked using a crosslinking agent.
8. A flexible conductive material suitable for high tensile durability according to claim 1 wherein said additives are cross-linking agents, co-cross-linking agents, coupling agents, catalysts, antioxidants, co-binders, deaerating agents, wetting agents, flame retardants, adhesion promoters, fillers, dispersants, surfactants, and combinations of two or more thereof.
9. A method of preparing a flexible conductive material suitable for high stretch durability comprising the steps of:
step S100: stirring the elastomer matrix and the solvent at normal temperature until the elastomer matrix and the solvent are uniformly mixed;
step S200: sequentially adding liquid metal, conductive particles or carbon materials and additives, and continuously stirring until a uniform fluid mixture is obtained;
step S300: taking out the fluid mixture, repeatedly grinding the fluid mixture by using a high-speed mixer, and collecting the ground liquid mixture;
step S400: the liquid mixture is coated on the base material in a printing, dispensing or coating mode, and is placed in an oven for baking, so that the flexible conductive material suitable for high stretching durability is obtained.
10. A flexible conductive material suitable for high stretch durability as defined in any one of claims 1-8 or a flexible conductive material suitable for high stretch durability as defined in claim 9, for use as a flexible electronic product, wearable garment, flexible circuit, flexible electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311131815.9A CN117059299A (en) | 2023-09-04 | 2023-09-04 | Flexible conductive material suitable for high stretching durability, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311131815.9A CN117059299A (en) | 2023-09-04 | 2023-09-04 | Flexible conductive material suitable for high stretching durability, preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117059299A true CN117059299A (en) | 2023-11-14 |
Family
ID=88653528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311131815.9A Pending CN117059299A (en) | 2023-09-04 | 2023-09-04 | Flexible conductive material suitable for high stretching durability, preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117059299A (en) |
-
2023
- 2023-09-04 CN CN202311131815.9A patent/CN117059299A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6624328B2 (en) | Method for manufacturing elastic electrode sheet, method for manufacturing elastic composite electrode sheet, method for manufacturing biological information measurement interface | |
| Ali et al. | Comparative performance of copper and silver coated stretchable fabrics | |
| EP3415021A1 (en) | Wearable electronic device, and method for manufacturing wearable electronic device | |
| US10546664B2 (en) | Stretchable conductor composition, paste for forming stretchable conductor, garment comprising wiring comprising stretchable conductor composition, and method for producing same | |
| TWI682405B (en) | Conductive silver paste | |
| EP3428220A1 (en) | Elastic conductor sheet and paste for forming elastic conductor sheet | |
| CN107345840B (en) | Preparation method of flexible force-sensitive sensor based on silver-loaded nanofiber | |
| CN109295707B (en) | Flexible thermoelectric nanofiber film and preparation and application thereof | |
| Alzaidi et al. | Smart textiles based wireless ECG system | |
| CN110283347B (en) | Elastic electromagnetic shielding film and preparation method thereof | |
| CN108018021B (en) | Sensing material contactable with living being, unit contactable with living being for sensing physiological parameter and manufacturing method thereof | |
| CN114220602B (en) | Preparation method of silver nanowire/MXene high-conductivity multifunctional heating and temperature sensing device | |
| CN117059299A (en) | Flexible conductive material suitable for high stretching durability, preparation method and application | |
| WO2018181681A1 (en) | Wearable smart device and connector conversion adapter | |
| CN117587637A (en) | Washable flexible multifunctional coaxial electrospun fiber membrane and preparation and application thereof | |
| CN115058886B (en) | Flexible nano-alloy piezoresistive sensing fabric and preparation method thereof | |
| CN108274865A (en) | Conducting connecting part and its manufacturing method | |
| CN115691857A (en) | Washing-resistant flexible conductive material and preparation method thereof | |
| JP2019180862A (en) | Glove type apparatus for subject biological information measurement, manufacturing method thereof, and biological information measurement method | |
| JP2022060290A (en) | Wearable smart device, biometric measurement method, clothing, and sports shirts | |
| CN208760136U (en) | Conducting connecting part | |
| JP6848613B2 (en) | Connector conversion adapter | |
| JP7000697B2 (en) | Wearable smart device | |
| CN113865477B (en) | Flexible strain film containing carbon nano tube/carbon nano cup composite structure and preparation method and application thereof | |
| CN116988303A (en) | Electronic textile, preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |