CN113123134B - Method for coating cashmere yarn by using graphene - Google Patents
Method for coating cashmere yarn by using graphene Download PDFInfo
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- CN113123134B CN113123134B CN202110337603.0A CN202110337603A CN113123134B CN 113123134 B CN113123134 B CN 113123134B CN 202110337603 A CN202110337603 A CN 202110337603A CN 113123134 B CN113123134 B CN 113123134B
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- 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
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
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- 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
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
- D06M10/06—Inorganic compounds or elements
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- 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
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
- D06M10/08—Organic compounds
- D06M10/10—Macromolecular compounds
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- 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
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- 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
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/10—Animal fibres
- D06M2101/12—Keratin fibres or silk
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- Chemical & Material Sciences (AREA)
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Abstract
A method for coating cashmere yarns by using graphene is characterized by comprising the following steps: step 1; preparing a graphene and water-based polyacrylic acid emulsion mixture; mixing graphene and water-based polyacrylic acid emulsion, stirring the mixed graphene and water-based polyacrylic acid emulsion, and performing ultrasonic treatment for 10-20min to form a graphene and water-based polyacrylic acid emulsion mixture dispersion system; each part of graphene contains 0.001-0.01 part by mass of graphene oxide; step 2; treating the mixture of the graphene and the aqueous polyacrylic acid emulsion prepared in the step 1 on the cashmere yarn in a coating finishing mode; step 3; curing; and (3) carrying out surface curing treatment on the cashmere yarn obtained by the treatment in the step (2).
Description
Technical Field
The invention relates to the technical field of graphene finishing of textiles, in particular to a method for coating and finishing cashmere yarns by using graphene.
Background
Graphene is a compound represented by sp 2 The hybridized single-layer carbon atoms are arranged to form a hexagonal net-shaped two-dimensional structure, and have a plurality of excellent physical properties, such as good electrical properties, high thermal conductivity, high mechanical strength, thin thickness and the like. The unique performance advantages of the material enable the material to have wide development prospects in the fields of flexible electronic materials, intelligent sensing and biomedicine. In recent years, graphene is increasingly widely applied in the textile industry, and the preparation of high-performance textile fibers, conductive fabrics, antibacterial products, intelligent textiles and the like by using graphene gradually becomes a hot spot and an important subject of research.
The water-based acrylic emulsion (pure) is an environment-friendly chemical auxiliary agent, has the characteristics of no toxicity, no stimulation, no harm to human bodies, accordance with the requirement of environmental protection, excellent gloss and transparency, good color and gloss retention, and more active monomers on the surface. However, the water resistance is poor, and the surface properties after film formation are deteriorated, and the development and application thereof are limited to some extent.
The graphene adopted as the surface coating has the characteristics of convenience in construction, low cost, simplicity in maintenance and the like. The shielding performance of the graphene film is excellent, the graphene film has good barrier property to gas and liquid,
so far, no method for coating and finishing cashmere yarns by using graphene exists.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for coating cashmere yarns by using graphene, which can effectively solve the problems in the prior art.
In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:
a method of coating cashmere yarns with graphene, comprising the steps of:
More preferably, 0.2 to 1 mass part of cashmere yarn is immersed into 10 to 15 mass parts of the mixture of graphene and aqueous polyacrylic acid emulsion for treatment for 5 to 30 seconds at the ambient temperature of 15 to 40 ℃.
Further preferably, the cashmere yarn slowly passes through the cashmere yarn coating device at a constant speed, the cashmere yarn is kept in a tight state in the process of passing through the cashmere yarn coating device, and the cashmere yarn is extruded from a yarn threading port in the coating finishing process, so that the mixture of the graphene and the aqueous polyacrylic acid emulsion is blade-coated on the cashmere yarn.
The cashmere yarn coating device comprises a liquid storage box, a coating godet roller, a coating nozzle, a heating box, a detachable heater, a temperature controller and a cashmere yarn collector with adjustable speed; wherein,
the liquid storage box comprises a mixture of graphene and water-based polyacrylic acid emulsion, the mixture is used for coating a coating on the surface of the cashmere yarn, the coating godet roller enables the cashmere yarn to be in a stretched state during coating, the coating nozzle outputs the cashmere yarn coated with the coating on the surface uniformly, a heating channel with two open ends is arranged in the heating box along the vertical direction, the cashmere yarn coated with the coating on the surface can enter the heating box to be heated, the detachable heater comprises a heat source or an ultraviolet lamp, the temperature controller is used for adjusting the temperature of the heater, the speed-adjustable cashmere yarn collector is provided with a yarn collecting roller, and the yarn collecting roller can rotate along a certain direction to draw and collect the composite yarn output from the heating channel.
The liquid storage box, the coating godet roller, the coating nozzle, the heating box, the detachable heater and the adjustable-speed cashmere yarn collector are sequentially vertically arranged and are positioned on a straight line.
The aperture of the coating nozzle is 0.4-3mm, and the coating nozzle is circular or polygonal.
Preferably, the cashmere yarn treated in the step 3 is heated at 30-50 ℃ for 10-60min, then taken out and cooled at the ambient temperature of 15-40 ℃.
Preferably, the curing agent is added into the mixture of the graphene and the aqueous polyacrylic acid emulsion, and the using amount of the curing agent is 0.1-0.25 parts by mass.
Preferably, the cashmere yarn treated in step 3 of the present invention is allowed to stand at normal temperature for 1.5 to 2 hours.
Preferably, the curing agent of the present invention is any one of primary amine, polythiol, polyphenol, low molecular polyamide, organic acid and acid anhydride, and low condensate.
Preferably, the photoinitiator is added into the mixture of the graphene and the aqueous polyacrylic acid emulsion, and the content of the photoinitiator is 0.05-0.15 parts by mass; irradiating the cashmere yarn treated in the step 3 for 20-25min under an ultraviolet lamp.
Compared with the prior art, the invention has the advantages that: the cashmere yarns are fully contacted with the mixture of the graphene and the water-based polyacrylic acid emulsion in the liquid storage box, and are uniformly coated under the traction and compression action of the coating godet roller and the coating nozzle, so that the coating efficiency is improved; the method adopts a mode of combining the graphene oxide or the graphene and the water-based polymer emulsion to realize the development of the graphene cashmere yarn and fills the blank of applying the graphene to the cashmere yarn.
Drawings
The drawings that are required to be used in the description of the embodiments are given below.
Figure 1 is a graph of the resistance change of a cashmere yarn treated with a prior art impregnation process.
Figure 2 is a graph of the resistance change of a cashmere yarn treated with the invention.
Figure 3 is an image of a cashmere yarn treated with a prior art impregnation method.
Figure 4 is an image of a cashmere yarn treated with the present invention.
Figure 5 is a graph comparing the mechanical properties of cashmere yarns treated by different methods.
Fig. 6 is an image of the surface of cashmere yarn treated with different concentrations of graphene oxide.
Fig. 7 is a graph of mechanical properties of cashmere yarns treated with different amounts of graphene oxide.
Fig. 8 is a graph of the thermal weight loss of coated yarns treated with different amounts of graphene oxide.
Fig. 9 is a graph comparing the mechanical properties of cashmere yarns treated by different curing methods.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail by referring to the following examples.
Example 1
A method of coating cashmere yarn with graphene, comprising the steps of:
A further preferred way of finishing the coating comprises immersing 0.2 parts by mass of cashmere yarn in 10 parts by mass of a mixture of graphene and aqueous polyacrylic emulsion at an ambient temperature of 15 ℃ for 5s.
A further preferred coating finishing mode comprises the steps that cashmere yarns slowly pass through the cashmere yarn coating device at a constant speed, the cashmere yarns are kept in a tight state in the process of passing through the cashmere yarn coating device, and the cashmere yarns are extruded through a yarn penetrating port in the coating finishing process, so that the mixture of the graphene and the aqueous polyacrylic acid emulsion is coated on the cashmere yarns in a blade mode.
The cashmere yarn coating device comprises a liquid storage box, a coating godet, a coating nozzle, a heating box, a detachable heater, a temperature controller and a speed-adjustable cashmere yarn collector.
The liquid storage box comprises a mixture of graphene and water-based polyacrylic acid emulsion to coat a coating on the surface of cashmere yarn, the coating godet roller enables the cashmere yarn to be in a stretched state during coating, the coating nozzle outputs the cashmere yarn coated with the coating on the surface uniformly, a heating channel with two open ends is arranged in the heating box along the vertical direction, the cashmere yarn coated with the coating on the surface can enter the heating channel to be heated, the detachable heater comprises a heat source or an ultraviolet lamp, the temperature controller is used for adjusting the temperature of the heater, the speed-adjustable cashmere yarn collector is provided with a yarn collecting roller, and the yarn collecting roller can rotate in a certain direction to pull and collect the composite yarn output from the heating channel.
In this embodiment, the liquid storage box, the coating godet, the coating nozzle, the heating cabinet, the detachable heater and the adjustable-speed cashmere yarn collector are vertically arranged in sequence and are positioned on a straight line.
In the embodiment, the aperture of the coating nozzle is 0.4mm, and the coating nozzle is circular or polygonal.
Preferably, in this embodiment, the cashmere yarn treated in step 3 is heated at 30 ℃ for 10min, then taken out, and cooled at ambient temperature of 15 ℃.
Preferably, in this embodiment, a curing agent is added to the mixture of graphene and the aqueous polyacrylic acid emulsion, and the amount of the curing agent is 0.1 part by mass.
Preferably, in the present embodiment, the cashmere yarn treated in step 3 is left to stand at room temperature for 1.5 hours.
In the present embodiment, the curing agent is preferably any one of a primary amine, a polythiol, a polyphenol, a low molecular weight polyamide, an organic acid, an acid anhydride, and a low condensate.
Preferably, in the embodiment, a photoinitiator is added to the mixture of the graphene and the aqueous polyacrylic acid emulsion, and the content of the photoinitiator is 0.05 parts by mass; irradiating the cashmere yarn treated in the step 3 for 20-25min under an ultraviolet lamp.
Example 2
A method of coating cashmere yarns with graphene, comprising the steps of:
A further preferred way of finishing the coating comprises immersing 1 part by mass of cashmere yarn in 15 parts by mass of a mixture of graphene and aqueous polyacrylic emulsion at an ambient temperature of 40 ℃ for 30s.
A further preferable coating finishing mode comprises the steps that the cashmere yarns slowly pass through the cashmere yarn coating device at a constant speed, the cashmere yarns are kept in a tight state in the process of passing through the cashmere yarn coating device, and the cashmere yarns are extruded through a yarn penetrating port in the coating finishing process, so that the mixture of the graphene and the aqueous polyacrylic acid emulsion is blade-coated on the cashmere yarns.
The cashmere yarn coating device comprises a speed-adjustable liquid storage box, a coating godet, a coating nozzle, a heating box, a detachable heater, a temperature controller and a speed-adjustable cashmere yarn collector.
The liquid storage box comprises a mixture of graphene and water-based polyacrylic acid emulsion and is used for coating a coating on the surface of cashmere yarn, the coating godet roller enables the cashmere yarn to be in a stretched state during coating, the coating nozzle outputs the cashmere yarn coated with the coating on the surface uniformly, a heating channel with two open ends is arranged in the heating box along the vertical direction, the cashmere yarn coated with the coating on the surface can enter the heating box to be heated, the detachable heater comprises a heat source or an ultraviolet lamp, the temperature controller is used for adjusting the temperature of the heater, the adjustable-speed cashmere yarn collector is provided with a yarn collecting roller, and the yarn collecting roller can rotate in a certain direction to pull and collect the composite yarn output in the heating channel.
In this embodiment, the liquid storage box, the coating godet, the coating nozzle, the heating cabinet, the detachable heater and the adjustable-speed cashmere yarn collector are vertically arranged in sequence and are positioned on a straight line.
In the embodiment, the aperture of the coating nozzle is 3mm, and the coating nozzle is circular or polygonal.
Preferably, in this embodiment, the cashmere yarn treated in step 3 is heated at 50 ℃ for 60min, then taken out, and cooled at ambient temperature of 40 ℃.
Preferably, in this embodiment, a curing agent is added to the mixture of graphene and the aqueous polyacrylic acid emulsion, and the amount of the curing agent is 0.25 parts by mass.
Preferably, in the present embodiment, the cashmere yarn treated in step 3 is left to stand at room temperature for 2 hours.
In the present embodiment, the curing agent is preferably any one of a primary amine, a polythiol, a polyphenol, a low molecular weight polyamide, an organic acid, an acid anhydride, and a low condensate.
Preferably, in the embodiment, a photoinitiator is added to the mixture of the graphene and the aqueous polyacrylic acid emulsion, and the content of the photoinitiator is 0.15 parts by mass; and (4) irradiating the cashmere yarn treated in the step (3) for 25min under an ultraviolet lamp.
Example 3
A method of coating cashmere yarns with graphene, comprising the steps of:
A further preferred way of finishing the coating comprises immersing 0.8 parts by mass of cashmere yarn in 12 parts by mass of a mixture of graphene and aqueous polyacrylic emulsion at an ambient temperature of 38 ℃ for 25s.
A further preferred coating finishing mode comprises the steps that cashmere yarns slowly pass through the cashmere yarn coating device at a constant speed, the cashmere yarns are kept in a tight state in the process of passing through the cashmere yarn coating device, and the cashmere yarns are extruded through a yarn penetrating port in the coating finishing process, so that the mixture of the graphene and the aqueous polyacrylic acid emulsion is coated on the cashmere yarns in a blade mode.
The cashmere yarn coating device comprises a liquid storage box, a coating godet, a coating nozzle, a heating box, a detachable heater, a temperature controller and a speed-adjustable cashmere yarn collector.
The liquid storage box comprises a mixture of graphene and water-based polyacrylic acid emulsion to coat a coating on the surface of cashmere yarn, the coating godet roller enables the cashmere yarn to be in a stretched state during coating, the coating nozzle outputs the cashmere yarn coated with the coating on the surface uniformly, a heating channel with two open ends is arranged in the heating box along the vertical direction, the cashmere yarn coated with the coating on the surface can enter the heating channel to be heated, the detachable heater comprises a heat source or an ultraviolet lamp, the temperature controller is used for adjusting the temperature of the heater, the speed-adjustable cashmere yarn collector is provided with a yarn collecting roller, and the yarn collecting roller can rotate in a certain direction to pull and collect the composite yarn output from the heating channel.
In this embodiment, the liquid storage box, the coating godet, the coating nozzle, the heating cabinet, the detachable heater and the adjustable-speed cashmere yarn collector are vertically arranged in sequence and are positioned on a straight line.
In the embodiment, the aperture of the coating nozzle is 1mm, and the coating nozzle is circular or polygonal.
Preferably, in this embodiment, the cashmere yarn treated in step 3 is heated at 40 ℃ for 50min, then taken out, and cooled at ambient temperature of 35 ℃.
Preferably, in this embodiment, a curing agent is added to the mixture of graphene and the aqueous polyacrylic acid emulsion, and the amount of the curing agent is 0.2 parts by mass.
Preferably, in the present embodiment, the cashmere yarn treated in step 3 is allowed to stand at room temperature for 1.8 hours.
In the present embodiment, the curing agent is preferably any one of a primary amine, a polythiol, a polyphenol, a low molecular weight polyamide, an organic acid, an acid anhydride, and a low condensate.
Preferably, in the embodiment, a photoinitiator is added into the mixture of the graphene and the aqueous polyacrylic acid emulsion, and the content of the photoinitiator is 0.12 part by mass; and (4) irradiating the cashmere yarns treated in the step (3) for 20min under an ultraviolet lamp.
The product obtained by the invention is subjected to a thermal stability test at an ambient temperature of 23 ℃, a VC890C + digital multimeter is used for measuring the resistance, 5 samples are tested under each test condition, and an average value is taken. As can be seen from fig. 1 and 2, the movement of each charge in the conductive yarn becomes stable with time and eventually reaches a stable value, and the resistance of the yarn treated by the immersion method is higher than that of the yarn treated by the threading method. However, at the same working temperature, the resistance change rate of the heating yarn processed by the graphene ink slurry yarn threading method is smaller than that of the yarn processed by the graphene impregnation method. The coating is mainly related to the uniformity of the graphene coating, and in the process of using the threading method, the outer part of the yarn coating is extruded and tightly attached to the surface of the yarn, so that the threading method coating is more uniform.
The product obtained by the invention is subjected to surface morphology test, and the microscopic morphology of the coating surface is characterized and analyzed by using a Scanning Electron Microscope (SEM). As shown in fig. 3 and 4, the Scanning Electron Microscope (SEM) is used to perform characterization analysis on the yarn surface micro-topography of the two coating methods, and the obtained result also shows that the coating of the cashmere yarn by the threading method is more uniform.
The mechanical properties of the product obtained by the invention are tested, as shown in fig. 5, compared with the mechanical properties of the original yarn, the mechanical properties of the yarn treated by the coating are improved by the dipping method and the sand threading method compared with the original yarn, and the mechanical property improvement degree of the yarn threading method is slightly larger than that of the dipping method.
Analyzing the influence of the content of the graphene oxide on the performance of the cashmere yarn; as shown in fig. 6, (a), (b), (c), and (d) are surface morphologies after the surface morphology was treated by the scheme of the present invention, which are respectively 0.001 parts by mass, 0.002 parts by mass, 0.005 parts by mass, and 0.01 parts by mass of the graphene oxide. From the figure, we can clearly see that as the concentration of the graphene oxide increases, the connection between yarns gradually occurs to form the film, and the film forming is better when the concentration is higher.
As shown in fig. 7, when the content of graphene oxide is increased to 0.0045 parts by mass, the dispersion of stability in the system is deteriorated, defects are generated inside, resulting in a decrease in the strength of the yarn, which is even smaller than that of the untreated raw yarn; when the content of the oxidized graphene is continuously increased, the oxidized graphene contains a large amount of oxygen-containing groups, and the oxidized graphene is mutually crosslinked in water to form a reinforcing network, so that the mechanical property of the processed cashmere yarn is continuously improved.
As shown in fig. 8, it can be seen from the thermogravimetry graph that, at the same temperature, the temperature of the coating film obtained by the GO-PA composite emulsion coating yarn at the end of decomposition is higher than that of the coating yarn of pure PA emulsion alone. The graphene oxide can effectively improve the thermal stability of the composite coating existing in the composite emulsion film. When the addition amount of GO is increased from 0.0045 to 0.006, the thermal decomposition temperatures of the mass retention rate at a certain moment in the waveband are almost consistent and have little difference.
The effect of the curing process on the performance of the cashmere yarn; analyzing the strength change and the elongation at break change of the cashmere yarns treated by the drying method, the chemical method and the ultraviolet curing method, as can be seen from fig. 9, the drying method has the least damage to the cashmere yarns, while the chemical method and the ultraviolet curing method have the larger damage to the strength of the cashmere yarns, and the elongation at break is reduced.
It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner in which the invention is practiced, and it is to be understood that the scope of the invention is not limited to such specifically recited statements and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
Claims (9)
1. A method for coating cashmere yarns by using graphene is characterized by comprising the following steps:
step 1; preparing a graphene and water-based polyacrylic acid emulsion mixture; mixing graphene and water-based polyacrylic acid emulsion, stirring the mixed graphene and water-based polyacrylic acid emulsion, and performing ultrasonic treatment for 10-20min to form a graphene and water-based polyacrylic acid emulsion mixture dispersion system; each part of graphene contains 0.001-0.01 part by mass of graphene oxide;
step 2; treating the mixture of the graphene and the aqueous polyacrylic acid emulsion prepared in the step 1 on the cashmere yarn in a coating finishing mode;
step 3; curing; carrying out surface curing treatment on the cashmere yarn obtained by the step 2;
and adding a curing agent into the mixture of the graphene and the aqueous polyacrylic acid emulsion, wherein the using amount of the curing agent is 0.1-0.25 part by mass.
2. The method for coating cashmere yarns with graphene according to claim 1, characterized in that: the coating finishing mode comprises the step of immersing 0.2-1 part by mass of cashmere yarn into 10-15 parts by mass of a mixture of graphene and aqueous polyacrylic acid emulsion for treatment for 5-30s at the ambient temperature of 15-40 ℃.
3. The method for coating cashmere yarns with graphene according to claim 1, characterized in that: the coating finishing mode comprises the steps that the cashmere yarns slowly pass through the cashmere yarn coating device at a constant speed, the cashmere yarns are kept in a tight state in the process of passing through the cashmere yarn coating device, and the cashmere yarns are extruded through a yarn penetrating port in the coating finishing process, so that the mixture of the graphene and the aqueous polyacrylic acid emulsion is blade-coated on the cashmere yarns.
4. A method for coating cashmere yarns with graphene according to claim 3, characterized in that: the cashmere yarn coating device comprises a liquid storage box, a coating godet, a coating nozzle, a heating box, a detachable heater, a temperature controller and a cashmere yarn collector with adjustable speed; wherein,
the liquid storage box contains a mixture of graphene and water-based polyacrylic acid emulsion for coating a coating on the surface of the cashmere yarn, the coating godet roller enables the cashmere yarn to be in a stretched state during coating, the coating nozzle outputs the cashmere yarn coated with the coating on the surface uniformly, a heating channel with two open ends is arranged in the heating box along the vertical direction, the cashmere yarn coated with the coating on the surface can enter the heating box to be heated, the detachable heater comprises a heat source or an ultraviolet lamp, the temperature controller is used for adjusting the temperature of the heater, the speed-adjustable cashmere yarn collector is provided with a yarn collecting roller, and the yarn collecting roller can rotate in a certain direction to draw and collect the composite yarn output from the heating channel;
the liquid storage box, the coating godet roller, the coating nozzle, the heating box, the detachable heater and the adjustable-speed cashmere yarn collector are vertically arranged in sequence and are positioned on a straight line.
5. The method for coating cashmere yarns with graphene according to claim 4, characterized in that: the aperture of the coating nozzle is 0.4-3mm, and the coating nozzle is circular or polygonal.
6. The method for coating cashmere yarns with graphene according to claim 1, characterized in that: and (3) heating the cashmere yarns treated in the step (3) at 30-50 ℃ for 10-60min, taking out, and cooling at the ambient temperature of 15-40 ℃.
7. The method for coating cashmere yarns with graphene according to claim 1, characterized in that: and (4) standing the cashmere yarn treated in the step (3) for 1.5-2h at normal temperature.
8. The method for coating cashmere yarns with graphene according to claim 1, wherein: the curing agent is any one of primary amine, polythiol, polyphenol, low molecular polyamide, organic acid and anhydride and low condensate.
9. The method for coating cashmere yarns with graphene according to claim 1, characterized in that: adding a photoinitiator into the mixture of the graphene and the aqueous polyacrylic acid emulsion, wherein the content of the photoinitiator is 0.05-0.15 parts by mass; irradiating the cashmere yarn treated in the step 3 for 20-25min under an ultraviolet lamp.
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