CN114855328A - Breathable stretchable conductive yarn and preparation method and application thereof - Google Patents
Breathable stretchable conductive yarn and preparation method and application thereof Download PDFInfo
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- CN114855328A CN114855328A CN202210589637.3A CN202210589637A CN114855328A CN 114855328 A CN114855328 A CN 114855328A CN 202210589637 A CN202210589637 A CN 202210589637A CN 114855328 A CN114855328 A CN 114855328A
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- AVGQTJUPLKNPQP-UHFFFAOYSA-N 1,1,1-trichloropropane Chemical compound CCC(Cl)(Cl)Cl AVGQTJUPLKNPQP-UHFFFAOYSA-N 0.000 claims description 2
- KNKRKFALVUDBJE-UHFFFAOYSA-N 1,2-dichloropropane Chemical compound CC(Cl)CCl KNKRKFALVUDBJE-UHFFFAOYSA-N 0.000 claims description 2
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- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 239000004636 vulcanized rubber Substances 0.000 claims description 2
- 238000001523 electrospinning Methods 0.000 claims 2
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Images
Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/441—Yarns or threads with antistatic, conductive or radiation-shielding properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/56—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of cyclic compounds with one carbon-to-carbon double bond in the side chain
Abstract
The invention discloses a breathable stretchable conductive yarn and a preparation method and application thereof, and belongs to the technical field of flexible electronics. The preparation method comprises the following steps: (1) preparing porous TPE yarns through electrostatic spinning; (2) the breathable stretchable conductive yarn is prepared by dip coating a silver nanowire solution. Meanwhile, the invention also discloses the application of the conductive yarn in fabric electrodes, intelligent leads and multifunctional sensor equipment. The breathable stretchable conductive yarn provided by the invention has a communicated porous structure, has excellent wear resistance, breathable and liquid permeability and good permeability, improves the physiological comfort and biocompatibility of equipment on a human body, is simple in preparation method, and is suitable for industrial popularization.
Description
Technical Field
The invention relates to the field of flexible electronics, in particular to a breathable stretchable conductive yarn and a preparation method and application thereof.
Background
Stretchable electronics are crucial for practical wearable applications, monitoring human-machine interfaces from personal healthcare, human activities. Conventional stretchable electronic devices mostly use low permeability elastomeric (typically silicone) films as substrates, which makes high permeability for wearable applications undesirable. Compared with the film type device, the fiber type device is softer and lighter, better conforms to the curved surface of a human body, can be conveniently integrated into various textiles, and does not influence the air permeability and the physical comfort of the base material. On the other hand, the fiber structure is an ideal form for transmitting power and signals, and when the fiber structure is used as a sensor, distributed sensing and information transmission can be simultaneously carried out through a fiber-shaped device.
Sensitivity, stretchability, conformal contact effect, wear resistance, etc. are the main metrics of stretchable electronic devices, and factors such as ease of implementation and manufacturing cost are also considered. The mechanical properties of the flexible stretchable electrode are affected by both the conductive filler and the elastic substrate, and the affinity between the elastic matrix and the sensing material has a large influence on maintaining good sensing stability and mechanical properties. The conductive material of the one-dimensional stretchable electronic device in the prior art comprises carbon-based nano material fibers, metal-based nano material fibers and the like, and the substrate material is divided into two strategies according to the preparation mode: the mixture of conductive material and elastomer matrix is extracted directly into the fiber, such as wet spinning, dry spinning, and hot stretch spinning. However, the preparation of one-dimensional elastic conductive fibers with air permeability, stretchability and wear resistance is not related in the prior art.
Therefore, how to provide a breathable stretchable conductive fiber with good abrasion resistance is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide the breathable stretchable conductive yarn and the preparation method and application thereof, and the obtained product has high breathability, good conductivity, excellent wear resistance and elasticity.
In order to achieve the purpose, the invention provides the following scheme:
the breathable stretchable conductive yarn sequentially comprises a porous elastic substrate layer and an inner electrode layer from inside to outside.
Preferably, the method further comprises the following steps: a porous outer cladding layer;
the porous outer cladding layer is coated on the surface of the conductive layer.
Has the advantages that: according to the requirements of practical application, a coated TPE coating layer is formed on the surface of the breathable and stretchable conductive yarn, so that the capabilities of protecting devices, electrically isolating and enhancing external interference resistance can be achieved, and the thickness of the coating layer can be regulated and controlled by changing the spinning time.
Preferably, the porous elastic substrate layer is a porous TPE yarn assembled by electrostatic spinning micro-nano fibers;
the conducting layer is a porous conducting layer assembled by silver nanowires with the diameter of 50 nm;
the porous outer coating layer is a TPE porous outer coating layer assembled by electrostatic spinning micro-nano fibers;
the basic constitution unit of the porous TPE yarn is TPE electrostatic spinning micro-nano fiber, and the diameter of the TPE electrostatic spinning micro-nano fiber is 30 mu m-3 mm;
preferably, the diameter of the TPE electrostatic spinning micro-nano fiber is 555-1777 mu m.
A preparation method of the breathable stretchable conductive yarn comprises the following steps:
(1) dissolving a TPE material in an organic solvent to obtain a spinning solution, and then preparing TPE yarns from the spinning solution through electrostatic spinning by using metal wires as templates;
(2) and stripping the TPE yarn from the surface of the metal wire, drying, and coating a silver nanowire solution on the surface to obtain the conductive fiber. To increase the conductivity of the yarn, the above silver nanowire impregnation and drying process is repeated until the desired conductivity is obtained.
Has the advantages that: according to the invention, the TPE micro-nano fibers are prepared from the spinning solution through electrostatic spinning, and are coated on the surface of the metal wire, so that TPE yarns with a highly porous structure can be prepared, the metal wire is used as a TPE micro-nano fiber collecting device, the spatial distribution of an electrostatic field can be controlled, the selective collection of electrostatic spinning products and the assembly of the micro-nano fibers are realized, and the loading of silver nanowires on the surface of the TPE yarns can be improved by repeating the processes of coating and drying, so that the overall conductivity is improved.
Preferably, the TPE material in step (1) includes one or more of styrene-butadiene rubber, hydrogenated styrene-butadiene rubber, polyurethane, styrene-isoprene block copolymer, hydrogenated block copolymer, thermoplastic polyester elastomer, thermoplastic polyurethane elastomer, thermoplastic polyolefin elastomer, thermoplastic vulcanized rubber, trans-polybutadiene, polyimide, and thermoplastic polyamide elastomer;
the organic solvent comprises one or a mixture of more of toluene, chloroform, dichloromethane, dichloroethane, trichloroethane, dichloropropane, trichloropropane, dimethylformamide, tetrahydrofuran and dimethyl sulfoxide;
the concentration of the spinning solution is 3-30 wt%;
the metal wires have a diameter of 20 μm-2mm and include all kinds of common metal wires, such as one or more of iron wires, stainless steel wires, copper wires, nickel wires, aluminum wires, tungsten wires, silver wires, and gold wires.
Has the advantages that: the lower concentration of the spinning solution is beneficial to reducing the diameter of TPE fibers, but simultaneously, the deposition speed of a fiber film is reduced, and the spinning can not be performed due to the excessively low concentration. The higher concentration of the spinning solution is advantageous in increasing the diameter of the fiber and increasing the deposition rate of the fiber, but too high concentration may result in failure to spin smoothly and cause unevenness in the diameter of the fiber. The applicant searches for the spinning solution, and the finally obtained spinning solution has the advantages that the diameter of the fiber is uniform when the concentration is 10-30 wt%, and the deposition speed is proper, so that electrostatic spinning can be smoothly completed.
Preferably, the liquid supply speed in the electrostatic spinning process in the step (1) is 5-11 mL/min, the positive external voltage is 5-30 kV, the negative external voltage is-3-0 kV, and the shortest distance between a spinning nozzle of the electrostatic spinning equipment and a metal wire, namely the collection distance, is 15-25 cm.
Has the advantages that: the diameter of the TPE fiber can be regulated and controlled by changing the liquid supply speed of the TPE spinning solution under the conditions of fixed voltage and collection distance.
Preferably, the concentration of the silver nanowire solution in the step (2) is 1-100 mg/ml, and the solvent is one or a mixture of isopropanol, ethanol, methanol and water.
Has the advantages that: the pretreatment process can remove impurities and amorphous silver nanoparticles in the original silver nanowire solution.
Preferably, the coating mode in the step (2) is a dip-coating method.
Preferably, the step (2) is followed by the following steps:
(3) and coating the porous TPE yarns by taking the conductive yarns as a collecting electrostatic spinning template and performing electrostatic spinning again to form a porous outer coating layer.
An application of breathable stretchable conductive yarn in fabric electrodes, intelligent leads and multifunctional sensor equipment.
The invention discloses the following technical effects:
(1) the breathable stretchable conductive yarn provided by the invention has a communicated porous structure, and has breathable and liquid-permeable performances and good permeability. Permeability may impart a transmission capability to the stretchable electrode for liquid or gas analysts, allowing for high integration density of electronic systems with various sensing functions. The porous structure made of the electrostatic spinning micro-nano fiber material can provide air permeability for the constructed flexible/stretchable conductor, so that the physiological comfort and biocompatibility of equipment on a human body are improved to the maximum extent;
(2) the outer coating layer can protect the original wire, further improve the friction resistance of the conductive yarn, increase the performance of resisting external interference and improve the stability;
(3) the invention adopts the electrostatic spinning method to prepare the stretchable yarn substrate with excellent characteristics of high porosity, specific surface area, ultrahigh flexibility and the like, and has the advantages of low cost, high efficiency and large scale. In addition, the metal wire is used as a TPE micro-nano fiber collecting device, has a specific shape and dielectric properties, can control the spatial distribution of an electrostatic field, and realizes the selective collection of electrostatic spinning products and the assembly of nano fibers. In addition, the electrostatic spinning enriches the structural hierarchy of the micro-nano fiber substrate, and makes the multi-functionalization possible;
(4) the breathable stretchable conductive yarn provided by the invention is a composite yarn with a multi-layer concentric structure, and is respectively provided with the porous elastic substrate layer, the conductive layer and the porous outer coating layer from inside to outside, so that the preparation method is beneficial to the alternate flow of electrostatic spinning and dipping-lifting in the preparation process, and the simple preparation method is suitable for industrial batch production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a process for preparing a breathable and stretchable conductive yarn according to example 1 of the present invention;
fig. 2 is an SEM image of the conductive yarn prepared in example 1; wherein a is the surface appearance of the elastic substrate, b is the surface appearance of the conductive elastic yarn after being impregnated with the silver nanowires, and c is the section appearance of the breathable stretchable conductive yarn after being coated;
FIG. 3 is a pore volume distribution curve of pore diameters of the breathable stretchable conductive yarn before and after coating prepared in example 1;
FIG. 4 is a tensile strain-resistance versus change curve of the breathable and stretchable conductive yarn before and after coating prepared in example 1;
fig. 5 is a cycle test of repeated stretching of the breathable stretchable conductive yarn before and after coating at a strain of 30% prepared in example 1;
FIG. 6 is a graph showing the relative change in the tack-free resistance of the air-permeable stretchable conductive yarn before and after wrapping as prepared in example 1;
FIG. 7 is a graph showing the relative change in abrasion resistance of the air-permeable stretchable conductive yarn before and after coating prepared in example 1;
FIG. 8 is a graph showing the relative change of the water washing resistance of the air-permeable stretchable electrically conductive yarn before and after covering prepared in example 1;
fig. 9 is a tensile strain-resistance versus change curve of the non-porous composite conductive elastic yarn prepared in comparative example 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1
A breathable, stretchable, electrically conductive yarn:
the porous elastic substrate layer, the conductive layer and the porous outer cladding layer are sequentially arranged from inside to outside.
The porous elastic substrate layer and the porous outer cladding layer are electrostatic spinning micro-nano SBS fibers, and the conducting layer is silver nanowires.
A method for preparing a breathable stretchable conductive yarn, which is shown in fig. 1, and comprises the following steps:
(1) preparing a spinning solution: weighing SBS raw materials, adding the SBS raw materials into dichloroethane, placing the dichloroethane in a constant-temperature heating stirrer for stirring (the typical stirring speed is 500rpm, the stirring time is 2 hours), setting the heating temperature (the typical heating temperature is 60 ℃) which is lower than the boiling point of the dichloroethane to accelerate the dissolution of SBS, and finally obtaining SBS spinning solution with the concentration of 25 wt%;
(2) preparing SBS yarns: injecting the SBS spinning solution into a solution injector of an electrostatic spinning machine, preparing SBS yarns through electrostatic spinning, wherein the fixed liquid supply speed is 8ml/min, the voltage is 14kV and the collection distance is 21cm in the electrostatic spinning process, and the diameter of the SBS yarns can be regulated and controlled by changing the electrostatic spinning time; in the spinning process, metal wires with the diameter of 200 mu m are adopted to collect SBS micro-nano fibers, and a mechanical device is used for controlling a spinning nozzle to move back and forth, so that the micro-nano fibers are more uniformly deposited on iron wires, and finally the SBS yarn is prepared.
(3) Stripping the SBS yarns: soaking absolute ethyl alcohol on the surface of the metal wire, stripping and drying the SBS yarn from the surface of the metal wire to obtain SBS yarn, and winding high-quality copper wires at two ends of the yarn to be taken as an external electrode to be led out;
(4) coating silver nanowires:
(41) pretreatment of silver nanowires: ultrasonically dispersing the silver nanowire solution for 15min, and taking out for later use;
(42) soaking SBS yarn in the treated silver nanowire solution for 10s, pulling, and drying at 70 deg.C for 5 min; repeating the soaking, lifting and drying processes to obtain the yarn with expected conductivity;
(5) preparing a porous outer coating layer: and coating the SBS micro-nano fiber on the surface of the conductive fiber again by using the obtained conductive yarn as a template and utilizing electrostatic spinning to form a layer of porous outer coating layer.
Technical effects
Referring to fig. 2, single micro-nano fibers with the average diameter of 7.29 μm in a part a in fig. 2 are stacked in a staggered manner to form a three-dimensional porous structure; in the part b of fig. 2, due to the large specific surface area and the expansion effect of the breathable and stretchable conductive yarn, the silver nanowires are firmly attached to the substrate and slightly penetrate through the substrate, so that the silver nanowires are stabilized on the substrate, and the overall external environment interference resistance of the conductive yarn is improved.
Fig. 3 shows a curve that the pores of the uncoated breathable stretchable conductive yarn are mainly macroporous, the pore diameter is 4000-100000 nm, the porosity is 68.8966%, and the connected pore structure endows the yarn with good breathable and liquid-permeable performances, so that skin inflammation, allergy and other symptoms caused by air impermeability can be avoided when the yarn is in contact with the skin. The coated conductive yarn still keeps a wide range of pore structure, the porosity reaches 62.2327%, the coating layer has little influence on the integral pore structure of the elastic yarn, and the yarn still keeps excellent porous structure characteristics.
As can be seen from fig. 4, the critical strain of the conductive yarn before coating reaches 113%, which indicates that the resistance of the conductive yarn is relatively less changed along with the increase of external strain in a larger strain range, and the conductive yarn belongs to a corresponding strain range in the stretching process. The critical strain value of the coated conductive yarn is increased to 124%, and the tensile property is further increased.
As can be seen from fig. 5, in the case of repeating 9000 times for more times, the resistance change of the coated conductive yarn is less than 3, while the resistance value of the uncoated conductive yarn increases steeply in the cyclic stretching and shrinking processes, and the conductivity decreases significantly, indicating that the coating plays an important role in improving the stretching stability.
As can be seen from the figures 6-8, under the same external interference condition, the coated breathable stretchable conductive yarn has small relative change of resistance and stable conductivity. The uncoated breathable stretchable conductive yarn has relatively increased resistance change due to the increase of the sticking, rubbing and washing times towards the outside, but the change has no steep increase, which shows that the breathable stretchable conductive yarn has better stability, and the stability of the breathable stretchable conductive yarn is further improved by the coating layer.
Comparative example 1
The comparative example provides a preparation method of a nonporous composite elastic conductive fiber as a comparison of the influence of a pore structure on the composite elastic conductive fiber, comprising the following steps:
(1) preparing a spinning solution: weighing a certain amount of SBS raw material, adding into dichloroethane, placing in a constant-temperature heating stirrer to fully dissolve SBS, setting heating temperature to accelerate the dissolution of SBS, wherein the heating temperature is not higher than the boiling point of dichloroethane, and the concentration of SBS spinning solution is controlled at 25 wt%;
(2) preparing non-porous SBS fiber: an SBS round bar (the outer diameter is 19mm) is inserted into a PMMA tube with the outer diameter of 30mm and the inner diameter of 20mm, and then one end of the PMMA tube is heated and sealed. The SBS @ PMMA composite preform with the core cladding structure is heated and drawn in an optical fiber drawing tower (the temperature is 200 ℃, the lowering speed of the preform is 3mm/min, and the fiber traction speed is 5mm/s) to obtain the SBS @ PMMA fiber with the diameter of about 500 micrometers. And then soaking the SBS @ PMMA fiber in glacial acetic acid to completely remove the PMMA cladding on the surface, thereby obtaining the non-porous SBS fiber.
(3) Coating silver nanowires: ultrasonically dispersing the silver nanowire solution for 15min for later use; and soaking the SBS yarn in the treated silver nanowire solution for 10s, pulling, and drying at 70 ℃ for 5min to finally obtain the non-porous composite elastic conductive fiber. The silver nanowire dip coating and drying process was repeated to obtain the desired conductivity.
The technical effects are as follows:
through testing, the loading capacity of the silver nanowires of the non-porous composite conductive elastic fiber prepared by the comparative example is only 7.0886%, and the loading capacity of the breathable stretchable conductive yarn which is soaked for the same times in the silver nanowires (example 1) is 20.1468%. The method can show that under the condition that the times of impregnating the conductive filler are the same, the conductive filler loading capacity of the breathable stretchable conductive yarn is far larger than that of the nonporous composite conductive elastic fiber, and the communicated porous structure shows that the fiber substrate has larger specific surface area, thereby being beneficial to the loading and the stability of the conductive filler.
Referring to fig. 9, the critical strain value of the non-porous composite conductive elastic fiber obtained in comparative example 1 is 16%, and the bearable strain response range is significantly reduced compared to the porous composite conductive elastic yarn, which further indicates that the surface conductive filler of the non-porous composite conductive elastic fiber has poor load stability, the conductive filler loaded under the external stretching condition is easily damaged, the conductive performance polar distance is reduced, and the strain working range is narrow, thereby limiting further application thereof.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. The breathable stretchable conductive yarn is characterized by sequentially comprising a porous elastic substrate layer and a conductive layer from inside to outside.
2. The breathable, stretchable conductive yarn according to claim 1, further comprising: a porous outer cladding layer;
the porous outer cladding layer is wrapped on the outer surface of the inner electrode layer.
3. The breathable stretchable conductive yarn according to claim 1 or 2, wherein the porous elastic substrate layer is a porous TPE yarn assembled from electrospun micro-nano fibers;
the conducting layer is a porous conducting layer assembled by silver nanowires with the diameter of 50 nm;
the porous outer coating layer is a porous TPE yarn assembled by electrostatic spinning micro-nano fibers;
the basic constitution unit of the porous TPE yarn is TPE electrostatic spinning micro-nano fiber, and the diameter of the TPE electrostatic spinning micro-nano fiber is 30 mu m-3 mm.
4. A method for preparing the air-permeable stretchable conductive yarn as claimed in any one of claims 1 to 3, comprising the steps of:
(1) dissolving a TPE material in an organic solvent to obtain a spinning solution, and then preparing porous TPE yarns from the spinning solution through electrostatic spinning by using metal wires as templates;
(2) and (3) stripping and drying the porous TPE yarn from the surface of the metal wire, coating the silver nanowire solution on the surface, drying again, and repeating the coating and drying processes until the TPE fiber is fully impregnated by the silver nanowire solution to obtain the conductive yarn.
5. The method for preparing the breathable and stretchable conductive yarn as claimed in claim 4, wherein the TPE material in the step (1) comprises one or more of styrene-butadiene rubber, hydrogenated styrene-butadiene rubber, polyurethane, styrene-isoprene block copolymer, hydrogenated block copolymer, thermoplastic polyester elastomer, thermoplastic polyurethane elastomer, thermoplastic polyolefin elastomer, thermoplastic vulcanized rubber, trans-polybutadiene, polyimide and thermoplastic polyamide elastomer;
the organic solvent comprises one or a mixture of more of toluene, chloroform, dichloromethane, dichloroethane, trichloroethane, dichloropropane, trichloropropane, dimethylformamide, tetrahydrofuran and dimethyl sulfoxide;
the concentration of the spinning solution is 3-30 wt%;
the metal wire is 20-2 mm in diameter and comprises one or more of iron wire, stainless steel wire, copper wire, nickel wire, aluminum wire, tungsten wire, silver wire and gold wire.
6. The method for preparing air-permeable stretchable conductive yarn according to claim 4, wherein the liquid supply speed in the electrospinning process in the step (1) is 5-11 mL/min, the positive applied voltage is 5-30 kV, the negative applied voltage is-3-0 kV, and the shortest distance between the spinneret and the metal wire of the electrospinning device, i.e. the collection distance, is 15-25 cm.
7. The method for preparing the breathable and stretchable conductive yarn according to claim 4, wherein the concentration of the silver nanowire solution in the step (2) is 1-100 mg/ml, and the solvent is one or a mixture of isopropanol, ethanol, methanol and water.
8. The method for preparing the air-permeable stretchable conductive yarn as claimed in claim 4, wherein the coating manner in the step (2) is a dip-draw method.
9. The method for preparing the air-permeable stretchable conductive yarn as claimed in claim 4, further comprising the following steps after the step (2):
(3) and coating the porous TPE yarns by taking the conductive yarns as a collecting electrostatic spinning template and performing electrostatic spinning again to form a porous outer coating layer.
10. Use of the air-permeable stretchable conductive yarn according to any one of claims 1 to 3 in a textile electrode, a smart lead, a multifunctional sensor device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115742273A (en) * | 2022-12-07 | 2023-03-07 | 之江实验室 | Drawing preparation method of multispectral flexible self-healing optical fiber |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120129682A1 (en) * | 2010-11-23 | 2012-05-24 | Electronics And Telecommunications Research Institute | Method of fabricating nanowire porous medium and nanowire porous medium fabricated by the same |
| CN103554530A (en) * | 2013-10-11 | 2014-02-05 | 中国航空工业集团公司北京航空材料研究院 | Electric conductive continuous fiber-reinforced fabric or prepreg and electric conductive treatment method |
| CN105792394A (en) * | 2016-03-15 | 2016-07-20 | 东华大学 | Fibriform tensile heater and manufacture method thereof |
| CN107460727A (en) * | 2017-09-17 | 2017-12-12 | 赵兵 | A kind of conductive cotton fiber based on LBL self-assembly nano silver wire graphene |
| CN107558190A (en) * | 2017-09-17 | 2018-01-09 | 赵兵 | The nano silver wire conduction cotton fiber of conducting polymer parcel |
| CN109029508A (en) * | 2018-08-27 | 2018-12-18 | 武汉纺织大学 | With ventilative, moisture-inhibiting and the flexible electronic skin of thermal conditioning performance and preparation method thereof |
| CN111041820A (en) * | 2019-11-22 | 2020-04-21 | 华南理工大学 | High-conductivity-stability super-elastic yarn and preparation method and application thereof |
| US20200289017A1 (en) * | 2017-06-29 | 2020-09-17 | Knu-Industry Cooperation Foundation | Bio-Electrode For Measuring Bio-Signal And Producing Electrical Activity Based On Nano-Porous Permeable Membrane Having High Specific Surface Area And Method Of Manufacturing The Same |
| CN112127147A (en) * | 2020-07-24 | 2020-12-25 | 浙江工业大学 | Multifunctional conductive yarn, preparation thereof and application thereof in flexible wearable electronic fabric |
| CN114214833A (en) * | 2021-12-09 | 2022-03-22 | 西安理工大学 | Preparation method of flexible conductive fabric sensor based on silver nanowires/graphene |
| CN114232333A (en) * | 2021-12-17 | 2022-03-25 | 华南理工大学 | pAg-SiO2f one-dimensional porous composite material and preparation method and application thereof |
-
2022
- 2022-05-26 CN CN202210589637.3A patent/CN114855328A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120129682A1 (en) * | 2010-11-23 | 2012-05-24 | Electronics And Telecommunications Research Institute | Method of fabricating nanowire porous medium and nanowire porous medium fabricated by the same |
| CN103554530A (en) * | 2013-10-11 | 2014-02-05 | 中国航空工业集团公司北京航空材料研究院 | Electric conductive continuous fiber-reinforced fabric or prepreg and electric conductive treatment method |
| CN105792394A (en) * | 2016-03-15 | 2016-07-20 | 东华大学 | Fibriform tensile heater and manufacture method thereof |
| US20200289017A1 (en) * | 2017-06-29 | 2020-09-17 | Knu-Industry Cooperation Foundation | Bio-Electrode For Measuring Bio-Signal And Producing Electrical Activity Based On Nano-Porous Permeable Membrane Having High Specific Surface Area And Method Of Manufacturing The Same |
| CN107460727A (en) * | 2017-09-17 | 2017-12-12 | 赵兵 | A kind of conductive cotton fiber based on LBL self-assembly nano silver wire graphene |
| CN107558190A (en) * | 2017-09-17 | 2018-01-09 | 赵兵 | The nano silver wire conduction cotton fiber of conducting polymer parcel |
| CN109029508A (en) * | 2018-08-27 | 2018-12-18 | 武汉纺织大学 | With ventilative, moisture-inhibiting and the flexible electronic skin of thermal conditioning performance and preparation method thereof |
| CN111041820A (en) * | 2019-11-22 | 2020-04-21 | 华南理工大学 | High-conductivity-stability super-elastic yarn and preparation method and application thereof |
| CN112127147A (en) * | 2020-07-24 | 2020-12-25 | 浙江工业大学 | Multifunctional conductive yarn, preparation thereof and application thereof in flexible wearable electronic fabric |
| CN114214833A (en) * | 2021-12-09 | 2022-03-22 | 西安理工大学 | Preparation method of flexible conductive fabric sensor based on silver nanowires/graphene |
| CN114232333A (en) * | 2021-12-17 | 2022-03-25 | 华南理工大学 | pAg-SiO2f one-dimensional porous composite material and preparation method and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115742273A (en) * | 2022-12-07 | 2023-03-07 | 之江实验室 | Drawing preparation method of multispectral flexible self-healing optical fiber |
| CN115742273B (en) * | 2022-12-07 | 2023-05-30 | 之江实验室 | Drawing preparation method of multispectral flexible self-healing optical fiber |
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Application publication date: 20220805 |