CN114622406B - Piezoresistive yarn preparation method and piezoresistive yarn prepared by same - Google Patents

Piezoresistive yarn preparation method and piezoresistive yarn prepared by same Download PDF

Info

Publication number
CN114622406B
CN114622406B CN202210304067.9A CN202210304067A CN114622406B CN 114622406 B CN114622406 B CN 114622406B CN 202210304067 A CN202210304067 A CN 202210304067A CN 114622406 B CN114622406 B CN 114622406B
Authority
CN
China
Prior art keywords
piezoresistive
yarn
coating
storage tank
liquid storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210304067.9A
Other languages
Chinese (zh)
Other versions
CN114622406A (en
Inventor
罗屹东
王国忠
李玉柱
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunshan Shuimu Yuankun Technology Co.,Ltd.
Original Assignee
Shuimu Shanhai Technology Foshan Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shuimu Shanhai Technology Foshan Co ltd filed Critical Shuimu Shanhai Technology Foshan Co ltd
Priority to CN202210304067.9A priority Critical patent/CN114622406B/en
Publication of CN114622406A publication Critical patent/CN114622406A/en
Application granted granted Critical
Publication of CN114622406B publication Critical patent/CN114622406B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
    • D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
    • 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
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
    • D06M13/2246—Esters of unsaturated carboxylic acids
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D06M15/05—Cellulose or derivatives thereof
    • D06M15/09—Cellulose ethers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/26—Polymers or copolymers of unsaturated carboxylic acids or derivatives thereof
    • D06M2101/28—Acrylonitrile; Methacrylonitrile
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/32—Polyesters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/34—Polyamides
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/50—Modified hand or grip properties; Softening compositions

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The application discloses a preparation method of piezoresistive yarn, which comprises the following steps: mixing conductive filler with polyurethane aqueous dispersion of 20-60 wt%, ultrasonic treating for 10-120 min, adding curing agent, stirring at 300-3000 r/min, and adding thickener to obtain piezoresistive coating liquid; pouring piezoresistive coating liquid into a liquid storage tank, enabling a yarn substrate to pass through the liquid storage tank, and coating a wet coating on the surface of the yarn substrate; placing the yarn base material coated with the wet coating on the surface at 100-150 ℃ for 5-60 s, winding at the speed of 0.5-30m/min, heating to 50-80 ℃ and drying for 0.5-5 h to obtain piezoresistive yarn; the round needle tube of the upper and lower outlets of the liquid storage tank is 0.1-5 mm; the thickness of the wet coating is 0.01-0.5 mm; the viscosity of the piezoresistive coating liquid is 500-5000cps; the apparent resistance value of the piezoresistive yarn is 200-20000 omega. The preparation method is operated in an aqueous system, has simple process, uses materials, is environment-friendly and pollution-free, is favorable for low-cost large-scale preparation, and the obtained piezoresistive yarn has good flexibility, high piezoresistive sensitivity, water resistance and alcohol resistance.

Description

Piezoresistive yarn preparation method and piezoresistive yarn prepared by same
Technical Field
The application relates to the field of preparation of functional yarn coatings, in particular to a piezoresistive yarn preparation method and piezoresistive yarn prepared by the piezoresistive yarn preparation method.
Background
The resistance type touch sensor responds to the position and the size of the applied force by utilizing the change of the resistance value of the pressure resistance material in the sensing unit, and the pressure resistance material is subjected to the action of the applied force to cause the change of energy bands so as to cause the change of the resistance value.
In the field of intelligent wearable, the piezoresistive material used in the resistive touch sensor can be yarns made of nylon, polyester, polyacrylonitrile and the like coated with a piezoresistive coating. The piezoresistive coating is prepared by dispersing micro-nano conductive particles or powder in a high polymer resin system, and in the preparation process, the carrier resin used in the conductive coating is mostly single-component or double-component acrylate resin, organic silicon resin and the like, and the content of the conductive particles or powder used in the piezoresistive coating is high, so that the yarns coated with the piezoresistive coating have the problem of poor alcohol resistance and washing resistance. In the preparation process, if the carrier resin is organic silicon resin, the formula of the organic silicon resin has the advantages of softness and skin friendliness, but the problems of high viscosity of a formula system, difficulty in uniform dispersion of conductive particles or powder, multiple bubbles and long-time high-temperature curing are solved; in the preparation process, when acrylate resin is used, the cured or dried piezoresistive coating has the problems of higher hardness, poor skin-friendly property, poor laminating property and poor piezoresistive sensitivity.
Disclosure of Invention
Based on this, in order to solve one of the above problems, the first aspect of the present application provides a method for preparing a piezoresistive yarn, which specifically comprises the following technical scheme:
a method of making a piezoresistive yarn, said method comprising:
mixing conductive filler with polyurethane aqueous dispersion of 20-60 wt%, then carrying out ultrasonic treatment for 10-120 min, adding a curing agent, stirring at a rotating speed of 300-3000 r/min for 30min-2h, and then adding a thickening agent to obtain piezoresistive coating liquid;
pouring the piezoresistive coating liquid into a liquid storage tank, and enabling the yarn base material to pass through the liquid storage tank to obtain the yarn base material with the surface coated with the wet coating;
the yarn base material with the surface coated with the wet coating is placed under the temperature condition of 100-150 ℃, the surface is dried for 5-60 s, then the yarn base material with the surface coated with the wet coating is coiled at the speed of 0.5-30m/min, and then the yarn base material is placed under the temperature condition of 50-80 ℃ and dried for 0.5-5 h, thus obtaining piezoresistive yarn;
the round needle tube of the upper and lower outlets of the liquid storage tank is 0.1-5 mm;
the thickness of the wet coating is 0.01-0.5 mm;
the viscosity of the piezoresistive coating liquid is 500-5000cps;
the apparent resistance value of the piezoresistive yarn is 200-20000 omega.
Further, the curing agent is one or more of di (propylene glycol) allyl ether acrylate, ethylene glycol dicyclopentadienyl ether acrylate, di (propylene glycol) allyl ether methacrylate and ethylene glycol dicyclopentadienyl ether methacrylate;
further, the mass of the curing agent is 0.3 to 5wt% based on the total mass of the aqueous polyurethane dispersion.
Further, the thickener is one or more of carboxymethyl cellulose, guar gum and hydrophobically modified polyurethane;
further, the thickener is 0.1 to 3% by weight based on the total mass of the aqueous polyurethane dispersion.
Further, the conductive filler is one or more of conductive carbon black, graphite, conductive metal powder, graphene and carbon nano tubes.
Further, the particle diameters of the conductive carbon black, graphite and conductive metal powder are each independently 0.5 to 100 μm, and the solid contents of the graphene and carbon nanotubes are each independently 10 to 50wt%.
Further, the yarn base material is one of nylon, polyester and polypropylene.
Further, the speed of the winding treatment is 0.5-30m/min.
In a second aspect, the present technical solution further provides a piezoresistive yarn prepared by the above preparation method.
In a third aspect, the present technical solution further provides a piezoresistive sensor, including a sensor body and an electrode, where the sensor body is woven from the piezoresistive yarn.
The preparation methods are operated in an aqueous system, the process is simple, the used materials are environment-friendly and pollution-free, and the piezoresistive yarn with piezoresistive effect can be prepared in a large scale at low cost; the piezoresistive yarn obtained by the application has good flexibility, high piezoresistive sensitivity, water resistance and alcohol resistance. In addition, the application uses a polyurethane aqueous dispersion system with 20-60 wt% to prepare the piezoresistive yarn, and can obtain the piezoresistive yarn with excellent alcohol resistance and piezoresistive sensitivity.
Drawings
FIG. 1 is a microscopic schematic view of a piezoresistive yarn prepared in example 1 of the present application;
FIG. 2 is a schematic representation of the piezoresistive yarn produced in example 1 of the present application;
FIG. 3 is a diagram showing the piezoresistive effect of the piezoresistive yarn produced in example 1 of the present application in the 0.5-20N force range;
FIG. 4 is a schematic representation of a wash water test sample of piezoresistive yarn prepared in example 1 of the present application.
Detailed Description
The present application will be described in further detail with reference to the following examples thereof in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In one aspect, in an embodiment of the present application, a method for preparing a piezoresistive yarn, the method comprises:
a method of making a piezoresistive yarn, the method comprising:
mixing conductive filler with polyurethane aqueous dispersion of 20-60 wt%, ultrasonic treating for 10-120 min, adding curing agent, stirring at 300-3000 r/min, and adding thickener to obtain piezoresistive coating liquid;
pouring the piezoresistive coating liquid into a liquid storage tank, enabling a yarn substrate to pass through the liquid storage tank, and coating a wet coating on the surface of the yarn substrate;
placing the yarn base material coated with the wet coating on the surface at 100-150 ℃ for 5-60 s, winding at the speed of 0.5-30m/min, heating to 50-80 ℃ and drying for 0.5-5 h to obtain piezoresistive yarn;
the round needle tube of the upper and lower outlets of the liquid storage tank is 0.1-5 mm;
the thickness of the wet coating is 0.01-0.5 mm;
the viscosity of the piezoresistive coating liquid is 500-5000cps;
the apparent resistance value of the piezoresistive yarn is 200-20000 omega.
In one of the embodiments, preferably, the piezoresistive yarn has an apparent resistance value of 1000-10000 Ω; further preferably, the piezoresistive yarn has an apparent resistance value of 2000-5000 Ω;
the piezoresistive yarn prepared by the preparation method provided by the application has the resistance value controlled at 200-20000 omega, has an excellent micro-force resistance effect under the pressure of 0.5N, and can be applied to the preparation of intelligent wearable textiles and electronic elements.
In one embodiment, the curing agent is one or more of bis (propylene glycol) allyl ether acrylate, ethylene glycol dicyclopentadienyl ether acrylate, bis (propylene glycol) allyl ether methacrylate, and ethylene glycol dicyclopentadienyl ether methacrylate; the addition of the curing agent improves the water resistance and alcohol resistance of the piezoresistive coating, and meanwhile, the flexibility of the coating is not affected.
In one embodiment, the curing agent is 0.3 to 5 weight percent based on the total weight of the polyurethane aqueous dispersion; preferably, the mass of the curing agent is 0.5 to 4wt% based on the total mass of the polyurethane aqueous dispersion; more preferably, the curing agent is 1 to 3% by weight based on the total mass of the aqueous polyurethane dispersion.
In one embodiment, the thickener is one or more of carboxymethyl cellulose, guar gum, and hydrophobically modified polyurethane;
in one embodiment, the thickener is 0.1 to 3wt% based on the total mass of the aqueous polyurethane dispersion;
in one embodiment, the conductive filler is one or more of conductive carbon black, graphite, conductive metal powder, graphene and carbon nanotubes; the content of the conductive filler is 10-150 wt% based on the total mass of the polyurethane aqueous dispersion; preferably, the conductive filler is contained in an amount of 20 to 120wt% based on the total mass of the aqueous polyurethane dispersion.
In one embodiment, the particle size of the conductive carbon black, graphite and conductive metal powder are each independently 0.5 to 100 μm.
In one embodiment, the graphene is prepared for use as a graphene dispersion; the carbon nanotubes are prepared into a carbon nanotube dispersion liquid for use, and the solid content of the graphene dispersion liquid and the carbon nanotube dispersion liquid is 10-50wt% respectively.
In one embodiment, the yarn substrate is one of nylon, polyester, and polypropylene.
In one embodiment, the winding speed is 0.5-30m/min; preferably, the winding speed is 2-20 m/min; further preferably, the winding speed is 5-15 m/min;
according to the preparation method provided by the application, the winding speed is too high, so that the piezoresistive coating is not completely dry, and continuous production is difficult.
In one embodiment, the viscosity of the piezoresistive coating fluid is 500-5000cps; preferably, the viscosity of the piezoresistive coating liquid is 1000-3000cps; further preferably, the viscosity of the piezoresistive coating fluid is 1500-2000cps;
according to the preparation method provided by the application, the proper thickener is added into the aqueous polyurethane formula system, the viscosity is controlled to be 500-5000cps, the piezoresistive wet coating can be uniformly spread during yarn coating, the coating liquid is not easy to aggregate, and the stability of the obtained piezoresistive yarn is greatly improved.
In a second aspect, the present technical solution further provides a piezoresistive yarn prepared by the above preparation method.
In a third aspect, the present technical solution further provides a piezoresistive sensor, including a sensor body and an electrode, where the sensor body includes the piezoresistive yarn described above.
Embodiments of the present application will be described in detail below with reference to specific examples.
Example 1:
a preparation method of piezoresistive yarn comprises the following specific steps:
adding conductive carbon black with the particle size of 100 mu m into 20% of polyurethane aqueous dispersion, wherein the weight of the conductive carbon black is 30% of that of the polyurethane aqueous dispersion, carrying out ultrasonic treatment for 30min, then adding di (propylene glycol) allyl ether acrylate with the dosage of 2% of that of the polyurethane aqueous dispersion, stirring for 30min at the rotating speed of 3000r/min, adding carboxymethyl cellulose with the dosage of 0.1% of that of the polyurethane aqueous dispersion in the process, and controlling the viscosity of a formula system to be 500cps to obtain piezoresistive coating liquid;
fixing a liquid storage tank on a bracket, pouring prepared piezoresistive coating liquid into the liquid storage tank, wherein the upper outlet and the lower outlet of the liquid storage tank use round needle tubes with the diameter of 0.1mm, the yarns use 120D/2 strand nylon yarns, and the piezoresistive coating thickness is 0.01mm;
setting the temperature of the oven to 150 ℃, and enabling the yarn to pass through the liquid storage tank and then to be quickly surface-dried in 30 seconds through the oven;
winding the yarn after surface drying on a yarn cylinder, wherein the winding speed is controlled to be 5m/min;
and (5) placing the wound yarn in an oven at 50 ℃ for continuous drying for 5 hours to obtain the piezoresistive yarn with the piezoresistive effect.
Example 2:
a preparation method of piezoresistive yarn comprises the following specific steps:
adding graphene dispersion liquid with the solid content of 50% into polyurethane aqueous dispersion liquid with the solid content of 40%, wherein the weight of the graphene dispersion liquid is 10% of that of the polyurethane aqueous dispersion liquid, carrying out ultrasonic treatment for 10min, adding di (propylene glycol) allyl ether acrylate with the dosage of 2% of that of the polyurethane aqueous dispersion liquid, stirring for 2h at the rotating speed of 300r/min, and adding hydrophobically modified polyurethane with the dosage of 3% of that of the polyurethane aqueous dispersion liquid, wherein the viscosity of a formula system is controlled to be 5000cps, so as to obtain piezoresistive coating liquid;
fixing a liquid storage tank on a bracket, pouring prepared piezoresistive coating liquid into the liquid storage tank, wherein the upper outlet and the lower outlet of the liquid storage tank use round needle tubes with the diameters of 0.5mm, the yarns use 100D 5 strands of polyester yarns, and the thickness of the piezoresistive coating is 0.2mm;
setting the temperature of the drying tunnel to 100 ℃, and enabling the yarn to pass through the liquid storage tank and then rapidly surface-dry in 60 seconds after passing through the drying tunnel;
winding the yarn after surface drying on a yarn cylinder, wherein the winding speed is controlled to be 30m/min;
and (5) placing the wound yarn in an oven at 80 ℃ to continuously dry for 0.5h, and finally obtaining the piezoresistive yarn with the piezoresistive effect.
Example 3:
a preparation method of piezoresistive yarn comprises the following specific steps:
adding conductive copper powder with the particle size of 10 mu m into polyurethane aqueous dispersion with the solid content of 20%, wherein the weight of the conductive copper powder is 10% of that of the polyurethane aqueous dispersion, carrying out ultrasonic treatment for 120min, adding di (propylene glycol) allyl ether methacrylate with the dosage of 3% of that of the polyurethane aqueous dispersion, stirring for 1h at the rotating speed of 1000r/min, and adding guar gum with the dosage of 1% of that of the polyurethane aqueous dispersion in the process to control the viscosity of a formula system to be 2000cps so as to obtain piezoresistive coating liquid;
fixing a liquid storage tank on a bracket, pouring prepared piezoresistive coating liquid into the liquid storage tank, wherein the upper outlet and the lower outlet of the liquid storage tank use round needle tubes with the diameters of 0.5mm, the yarns use 100D 5 strands of polyacrylonitrile yarns, and the thickness of the piezoresistive coating is 0.5mm;
setting the temperature of the oven to 120 ℃, and enabling the yarn to pass through the liquid storage tank and then to be quickly surface-dried in 30 seconds through the oven;
winding the yarn after surface drying on a yarn cylinder, wherein the winding speed is controlled to be 10m/min;
and (5) placing the wound yarn in an oven at 60 ℃ for continuous drying for 2 hours, and finally obtaining the piezoresistive yarn with the piezoresistive effect.
Example 4:
a preparation method of piezoresistive yarn comprises the following specific steps:
adding a carbon nano tube dispersion liquid with the solid content of 10% into a polyurethane aqueous dispersion liquid with the solid content of 60%, wherein the weight of the carbon nano tube dispersion liquid is 150% of that of the polyurethane aqueous dispersion liquid, carrying out ultrasonic treatment for 30min, adding ethylene glycol dicyclopentadienyl ether methacrylate with the dosage of 1% of that of the polyurethane aqueous dispersion liquid, stirring for 1h at a rotating speed of 800r/min, and then adding a hydrophobic modified polyurethane control formula system with the dosage of 0.5% of that of the polyurethane aqueous dispersion liquid, wherein the viscosity of the hydrophobic modified polyurethane control formula system is 3000cps, so as to obtain a piezoresistive coating liquid;
fixing a liquid storage tank on a bracket, pouring prepared piezoresistive coating liquid into the liquid storage tank, wherein the upper outlet and the lower outlet of the liquid storage tank use round needle tubes with the diameters of 0.3mm, the yarns use 120D 3 strands of nylon yarns, and the thickness of the piezoresistive coating is 0.1mm;
the method comprises the following steps of (1) carrying out treatment; the temperature of the oven is set to 120 ℃, and the yarn passes through the liquid storage tank and then is quickly dried in 30 seconds by the oven;
winding the yarn after surface drying on a yarn cylinder, wherein the winding speed is controlled to be 5m/min;
after the preparation is finished, the wound yarn is placed in an oven at 60 ℃ to be dried continuously for 2 hours, and finally the piezoresistive yarn with the piezoresistive effect is obtained.
Comparative example 1:
the procedure is as in example 1, except that the aqueous polyurethane dispersion is changed to a 20% aqueous polyacrylate dispersion.
Comparative example 2:
the difference from example 2 is that the curing agent is changed to the curing agent MDI (diphenylmethane diisocyanate) which is commonly used in polyurethane systems, and the amount of the curing agent is 2% of the weight of the polyurethane aqueous dispersion.
Comparative example 3:
the difference was that the winding speed was controlled at 40m/min as in example 2.
Comparative example 4:
the difference was that the viscosity of the piezoresistive coating application liquid after the thickener was added was controlled to 200cps as in example 3.
The above examples and comparative examples were subjected to the following performance tests:
performance test 1: the piezoresistive yarn was sewn to the woven cloth, washed once and several times according to AATCC-61 2013 as shown in fig. 4, and the appearance of the piezoresistive coating was evaluated after washing, with no breakage rating of 5, very slight breakage rating of 4, slight breakage rating of 3, coating partial crack rating of 2, coating and yarn peeling rating of 1.
Performance test 2: alcohol resistance test, the piezoresistive yarn was immersed in 99% pure alcohol for 3min, and the coating integrity was assessed after removal.
Performance test 3: and (3) testing dry rubbing fastness, namely sewing the piezoresistive yarn on the woven cloth, and testing the dry rubbing fastness of the piezoresistive yarn according to a GB/T3920-2008 test method.
Performance test 4: piezoresistance circulation test, stitching piezoresistance yarns on woven cloth in a cross shape, clamping the woven cloth in an upper silica gel square and a lower silica gel square, and placing the woven cloth between an upper pressing head and a lower pressing head; the pre-pressurizing force is 1N, and the loading force value is 65N; the loading speed was 3mm/min for 10s, the unloading speed was 3mm/min for 5s. After a certain number of fatigue tests, taking down the sample, placing for a period of time, measuring the initial resistance of the sample, placing a 500g weight on the sensing point, measuring the resistance of the sample, and finally calculating the change rate of the measured resistance twice.
The test results of examples 1 to 5 and comparative examples 1 to 4 are shown in Table 1 below.
Table 1:
from the comparison result of the test performances of the example 1 and the comparative example 1, when the preparation method of the application uses a polyurethane aqueous dispersion system with the weight percent of 20-60 to prepare the piezoresistive yarn, compared with the use of a polyacrylate aqueous dispersion with the weight percent of 20 to prepare the piezoresistive yarn in the comparative example 1, the washing fastness, the alcohol resistance, the piezoresistive sensitivity and the dry rubbing fastness, especially the dry rubbing fastness of the prepared piezoresistive yarn can be effectively improved. From the comparison result of the test performance of the example 2 and the comparative example 2, the preparation method of the application uses the di (propylene glycol) allyl ether acrylate as the curing agent, and compared with the conventional curing agent MDI (diphenylmethane diisocyanate) of a polyurethane system used in the comparative example 2, the water resistance, alcohol resistance, piezoresistance sensitivity and flexibility of the prepared piezoresistive yarn can be effectively improved, and especially alcohol resistance can be improved. From the comparison of the test performances of the example 2 and the comparative example 3, when the winding speed exceeds 30m/min, the prepared piezoresistive yarn is poor in washing fastness, alcohol resistance, piezoresistive sensitivity and softness, the yarn is easy to break in the preparation process, the piezoresistive coating is not completely dry, and continuous production is difficult. From the comparison of the test performance of the example 2 and the comparative example 4, when the viscosity of the piezoresistive coating liquid is lower than 200cps, the prepared piezoresistive yarn has poor washability, alcohol resistance, piezoresistive sensitivity and flexibility, and the viscosity of the formula system is found to be too small in the preparation process, the surface of the prepared piezoresistive yarn is rough, the piezoresistive coating is difficult to uniformly spread, and the coating liquid is easy to gather and dry and is distributed in a node shape.
In addition, as can be seen from the analysis of fig. 1-4, fig. 1 is a microscopic schematic diagram of the piezoresistive yarn prepared in example 1 of the present application; from the figure, the piezoresistive coating is uniformly distributed on the surface of the chemical fiber yarn, and the conductive filler is distributed on the piezoresistive coating in the form of nano particles; FIG. 3 is a diagram showing the piezoresistive effect of the piezoresistive yarn produced in example 1 of the present application in the 0.5-20N force range; from fig. 2, it can be seen that the piezoresistive yarn prepared by the present application has excellent and stable micro-force piezoresistive effect; FIG. 4 is a schematic diagram of a water washed sample of the piezoresistive yarn prepared in example 1 of the present application, and it can be seen from FIG. 4 that the piezoresistive yarn of the present application has excellent water resistance and has no influence on flexibility after water washing.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (6)

1. A method of making a piezoresistive yarn, said method comprising:
adding conductive filler into polyurethane aqueous dispersion with the weight percent of 20-60%, uniformly mixing, then carrying out ultrasonic treatment for 10-120 min, adding a curing agent, stirring for 30-2 h at the rotating speed of 300-3000 r/min, and then adding a thickening agent to obtain piezoresistive coating liquid, wherein the curing agent is one or more of dipropylene glycol allyl ether acrylate, ethylene glycol dicyclopentadienyl ether acrylate, dipropylene glycol allyl ether methacrylate and ethylene glycol dicyclopentadienyl ether methacrylate; the mass of the curing agent is 0.3 to 5 weight percent based on the total mass of the polyurethane aqueous dispersion; the mass of the thickener is 0.1 to 3 weight percent based on the total mass of the polyurethane aqueous dispersion;
pouring the piezoresistive coating liquid into a liquid storage tank, and enabling the yarn base material to pass through the liquid storage tank to obtain the yarn base material with the surface coated with the wet coating;
the yarn base material with the surface coated with the wet coating is placed under the temperature condition of 100-150 ℃, the surface is dried for 5-60 s, then the yarn base material with the surface coated with the wet coating is coiled at the speed of 0.5-30m/min, and then the yarn base material is placed under the temperature condition of 50-80 ℃ and dried for 0.5-5 h, thus obtaining piezoresistive yarn;
the round needle tube of the upper and lower outlets of the liquid storage tank is 0.1-5 mm;
the thickness of the wet coating is 0.01-0.5 mm;
the viscosity of the piezoresistive coating liquid is 500-5000cps;
the apparent resistance value of the piezoresistive yarn is 200-20000 omega.
2. The method of claim 1, wherein the thickener is one or more of carboxymethyl cellulose, guar gum, and hydrophobically modified polyurethane.
3. The method of claim 1, wherein the conductive filler is one or more of conductive carbon black, graphite, conductive metal powder, graphene, carbon nanotubes; the content of the conductive filler is 10-150 wt% based on the total mass of the polyurethane aqueous dispersion.
4. The method according to claim 3, wherein the particle diameters of the conductive carbon black, graphite and conductive metal powder are each independently 0.5 to 100 μm.
5. The method of claim 1, wherein the yarn substrate is one of nylon, polyester, and polypropylene.
6. A piezoresistive sensor comprising a sensor body and electrodes, characterized in that said sensor body comprises a piezoresistive yarn prepared by the method according to any of claims 1-5.
CN202210304067.9A 2022-03-25 2022-03-25 Piezoresistive yarn preparation method and piezoresistive yarn prepared by same Active CN114622406B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210304067.9A CN114622406B (en) 2022-03-25 2022-03-25 Piezoresistive yarn preparation method and piezoresistive yarn prepared by same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210304067.9A CN114622406B (en) 2022-03-25 2022-03-25 Piezoresistive yarn preparation method and piezoresistive yarn prepared by same

Publications (2)

Publication Number Publication Date
CN114622406A CN114622406A (en) 2022-06-14
CN114622406B true CN114622406B (en) 2023-10-13

Family

ID=81904131

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210304067.9A Active CN114622406B (en) 2022-03-25 2022-03-25 Piezoresistive yarn preparation method and piezoresistive yarn prepared by same

Country Status (1)

Country Link
CN (1) CN114622406B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115491801B (en) * 2022-11-22 2023-01-13 天津红晨岛服饰有限公司 Graphene, carbon fiber and silica gel composite heat-preservation spinning thread and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105246315A (en) * 2015-10-21 2016-01-13 海宁卓泰电子材料有限公司 Flexible shielding material and preparation method thereof
KR20180103416A (en) * 2017-03-10 2018-09-19 주식회사 솔루에타 Adhesive Tape for Shielding Electromagnetic Wave and Manufacturing Method thereof
CN109208327A (en) * 2018-07-16 2019-01-15 山东黄河三角洲纺织科技研究院有限公司 A kind of conduction far infrared heating fiber and preparation method thereof
CN110467838A (en) * 2019-08-07 2019-11-19 安庆市泽烨新材料技术推广服务有限公司 A kind of waterborne conductive coating and preparation method 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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108085988A (en) * 2017-10-30 2018-05-29 东华镜月（苏州）纺织技术研究有限公司 The preparation method of condenser type stress sensing intelligent fabric

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105246315A (en) * 2015-10-21 2016-01-13 海宁卓泰电子材料有限公司 Flexible shielding material and preparation method thereof
KR20180103416A (en) * 2017-03-10 2018-09-19 주식회사 솔루에타 Adhesive Tape for Shielding Electromagnetic Wave and Manufacturing Method thereof
CN109208327A (en) * 2018-07-16 2019-01-15 山东黄河三角洲纺织科技研究院有限公司 A kind of conduction far infrared heating fiber and preparation method thereof
CN110467838A (en) * 2019-08-07 2019-11-19 安庆市泽烨新材料技术推广服务有限公司 A kind of waterborne conductive coating and preparation method 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
石墨烯高弹性应变传感器的制备及性能研究;陈志华;孙奉强;马昀;曲丽君;田明伟;;棉纺织技术(第09期);27-30 *

Also Published As

Publication number Publication date
CN114622406A (en) 2022-06-14

Similar Documents

Publication Publication Date Title
CN104451925B (en) A kind of water-soluble polymer/Graphene composite fibre and its preparation method and application
CN104790067B (en) Conductivity high molecule nanometer/graphene composite fibre and its preparation method and application
CN114622406B (en) Piezoresistive yarn preparation method and piezoresistive yarn prepared by same
CN106930098A (en) A kind of composite fibre, preparation method and its usage
WO2015066284A1 (en) Method for producing a fluffy temperature regulating warmth retention material and fluffy temperature regulating warmth retention material
CN106930097A (en) A kind of modified fibre product, preparation method and its usage
CN104630923A (en) Method for preparing carbon nano tube modified polyacrylonitrile fibers with solution in-situ polymerization technology
CN111941985B (en) Flexible strain sensing material and preparation method thereof
WO2017214741A1 (en) Process for preparing chitosan/polyvinyl alcohol composite electrically-conductive nanofibre
CN101250818A (en) Method for manufacturing intelligent thermoregulation type functional yarn
CN108517688A (en) A kind of production technology of RGO/Ag layer assemblies cellulose conductive yarn
CN106958052B (en) A kind of preparation method of graphene-anti-static polyacrylonitrile fibre
CN113073412B (en) Strain-insensitive conductive coated yarn and preparation method thereof
CN106930099A (en) A kind of composite fibre, preparation method and its usage
CN113737512B (en) Method for preparing elastic conductive fiber by micro-fluid coating technology and elastic conductive fiber
CN103556465B (en) Method for compounding natural protein fiber powder on surfaces of polymer filaments
CN107245878A (en) A kind of modified acrylic fibres product, preparation method and its usage
CN111206432A (en) Wet-process Yangbuck synthetic leather and preparation method thereof
CN110607582A (en) Method for preparing continuous PAN piezoelectric yarn by electrostatic spinning
CN110528158B (en) Long-acting anti-fouling fabric based on nanogel treatment and preparation method thereof
CN109797470A (en) A kind of preparation method of compliant conductive yarn
CN113062116B (en) Bionic structure strain insensitive conductive fiber and preparation method thereof
CN110449310B (en) Ultrasonic atomization auxiliary device and method for preparing antistatic polyester cotton yarn in auxiliary mode
CN108048952A (en) A kind of high resiliency easily bonds the preparation method of puu fiber
CN104562269A (en) Preparation method of thermal storage and temperature adjustment acrylic fibers

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20230419

Address after: Room 208, 2nd Floor, Building A, No. 92 Suiyan West Road, Dali Town, Nanhai District, Foshan City, Guangdong Province, 528200

Applicant after: Guangdong Qingfo Industry Investment and Development Co.,Ltd.

Applicant after: Luo Yidong

Address before: 528200 room No. 92-203, Hexi section, Suiyan Road, Yanbu Town, Dali Town, Nanhai District, Foshan City, Guangdong Province

Applicant before: Foshan (South China) New Material Research Institute

TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20230718

Address after: 528200 309, 311 and 313, third floor, block B, No. 92, Hexi section, Suiyan Road, Yanbu Town, Dali Town, Nanhai District, Foshan City, Guangdong Province (residence declaration)

Applicant after: Shuimu Shanhai Technology (Foshan) Co.,Ltd.

Address before: Room 208, 2nd Floor, Building A, No. 92 Suiyan West Road, Dali Town, Nanhai District, Foshan City, Guangdong Province, 528200

Applicant before: Guangdong Qingfo Industry Investment and Development Co.,Ltd.

Applicant before: Luo Yidong

GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20240504

Address after: Room 405, Building 12, No. 3 Shengxi Road, Kunshan Development Zone, Suzhou City, Jiangsu Province, 215300

Patentee after: Kunshan Shuimu Yuankun Technology Co.,Ltd.

Country or region after: China

Address before: 528200 309, 311 and 313, third floor, block B, No. 92, Hexi section, Suiyan Road, Yanbu Town, Dali Town, Nanhai District, Foshan City, Guangdong Province (residence declaration)

Patentee before: Shuimu Shanhai Technology (Foshan) Co.,Ltd.

Country or region before: China