CN109381336B - High-efficient heat production graphite alkene coating electric heat needle - Google Patents
High-efficient heat production graphite alkene coating electric heat needle Download PDFInfo
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- CN109381336B CN109381336B CN201811091413.XA CN201811091413A CN109381336B CN 109381336 B CN109381336 B CN 109381336B CN 201811091413 A CN201811091413 A CN 201811091413A CN 109381336 B CN109381336 B CN 109381336B
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- -1 graphite alkene Chemical class 0.000 title description 5
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- 229910021389 graphene Inorganic materials 0.000 claims abstract description 111
- 238000005485 electric heating Methods 0.000 claims abstract description 48
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 24
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
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- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 6
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H39/00—Devices for locating or stimulating specific reflex points of the body for physical therapy, e.g. acupuncture
- A61H39/08—Devices for applying needles to such points, i.e. for acupuncture ; Acupuncture needles or accessories therefor
- A61H39/086—Acupuncture needles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H39/00—Devices for locating or stimulating specific reflex points of the body for physical therapy, e.g. acupuncture
- A61H39/06—Devices for heating or cooling such points within cell-life limits
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
- A61H2201/02—Characteristics of apparatus not provided for in the preceding codes heated or cooled
- A61H2201/0207—Characteristics of apparatus not provided for in the preceding codes heated or cooled heated
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- Health & Medical Sciences (AREA)
- Rehabilitation Therapy (AREA)
- Epidemiology (AREA)
- Pain & Pain Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
A graphene coating electric heating needle capable of efficiently generating heat comprises a tubular hollow needle body and an integrated bevel needle point; the insulating and heat-insulating coating and the graphene coating of the nano-silica gel are attached to the outer surface of the hollow needle body; the insulating lead penetrates through the hollow needle body and the graphene coating to form a closed loop; the connection point of the insulated wire and the graphene coating and the insulated needle handle for lifting and pinching; the needle body is coated with the insulating coating and the graphene coating in sequence, and the heat production part of the needle body is the graphene coating, so that the heat production efficiency is higher and is superior to most of the existing electric heating materials; the positive electrode and the negative electrode of the power supply are respectively connected to the upper end and the lower end of the graphene coating through insulated wires, current does not flow through the needle body, the heat production position is accurate, and the temperature is easy to control; the electric heating needle provided by the invention has the advantages of simple structure, convenience in use, safety and reliability, and the needle handle is insulated and does not interfere with the fine operation of a needle applier.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a graphene-coated electric heating needle capable of efficiently producing heat.
Background
Acupuncture and moxibustion is an important component of traditional Chinese medicine inheritance, achieves the purpose of treatment by needling points on human body channels and collaterals to stimulate the human body, and is a treatment means from outside to inside. Warm needle acupuncture is an important component of acupuncture therapy and was mainly achieved in ancient times by burning moxa to produce heat. With the development of electronic science, warm needle therapeutic equipment is also continuously updated, and a series of electric heating acupuncture needles (hereinafter, referred to as electric heating needles) appear, and at present, the electric heating needles are mainly classified into a radio frequency type and a resistance type according to the heating characteristics. The radio frequency type electric heating needle emits radio frequency waves at the needle point to enable ions and polar macromolecules in surrounding tissues to oscillate, impact, rub and heat so as to realize heating of the surrounding tissues of the needle body. For example, patent CN104706419A discloses a radio frequency electric needle for acupuncture, which is constructed with a radio frequency output electrode at the needle tip to emit radio frequency current to induce peripheral tissues to generate heat; patent CN105726305A discloses a radio frequency electric heating needle with a coaxial structure of multilayer metal and insulating layer, wherein the axis of the inner metal and the outer metal layer are exposed at the needle point, and when the needle point penetrates into the body of a human body, the two layers and the tissue near the needle point form a treatment loop to generate heat. The radio frequency type electric heating needle has high heat generating efficiency, accurate heat generating position and is beneficial to the accuracy of treatment, but the structure is complex, the heat generating temperature is difficult to control effectively, high-frequency current flows through peripheral tissues, the safety has certain doubts, and certain limitation exists in the practical use.
The resistance type electric heating needle mainly generates heat through joule law when current flows through a large resistor, for example, patent CN106265060A realizes the self heating of the needle body by constructing a loop by using the self resistance of the hollow needle body; in the patent CN2390600, a resistance wire is wound on the inner wall of a hollow needle tube to realize heat generation at the needle tip; patent CN101947187A twines the resistance wire on the needle handle, and supplementary with insulating overcoat, the heat that produces the resistance wire is leading-in vivo through the needle body. Compared with a radio frequency type electric heating needle, the resistance type electric heating needle has the advantages of safety, reliability and simple structure, the heat production temperature is easy to control, the resistance type electric heating needle conducts heat to biological tissues after the needle body produces heat, the characteristics of warm needle treatment are better met, the resistance type electric heating needle can better replace a traditional warm needle treatment needle, but the heat production efficiency is lower, particularly the heat production capacity is lower under low voltage, and high voltage can cause certain harm to a human body and does not meet the requirements of the warm needle.
The graphene is a two-dimensional crystal material formed by single carbon atoms, and has excellent electrical properties (the electron mobility can reach 2 multiplied by 10 at room temperature)5 cm2Vs) and thermal conductivity (5000W/mK). The electric and heat conducting capacity of the graphene exceeds that of most metal materials, and meanwhile, the graphene has the advantages of corrosion resistance, good mechanical property and low density, so that the graphene has the potential of replacing metal in the field of electric heating materials and is used in various electric heating film patents. Design a graphite alkene superconductive far infrared electric heat membrane like patent CN104219797A, graphite alkene conductive paste is the core layer that generates heat, and the electric heat membrane that the insulating protective layer of supplementary upper and lower both sides formed that combines, and this graphite alkene electric heat membrane has suitable resistivity, has shown ultrafast rate of heating, high thermal conductivity and quick heat-sinking capability, does not have thermal inertia hardly, can conduct other materials with the heat rapidly to the realization is to the realization of temperatureAccurate control, and the required voltage of heat production is lower, can use in human safe voltage range. In view of this, the material can be used as an excellent heat-generating material for the design of the electric heating needle, and no report is found in the prior art.
Disclosure of Invention
In order to overcome the defects of the existing electric heating needle, the invention aims to provide the graphene-coated electric heating needle capable of efficiently generating heat.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a graphene coating electric heating needle capable of efficiently generating heat comprises a tubular hollow needle body 1 and an integrated bevel needle point 5; the outer surface of the hollow needle body 1 is sequentially attached with an insulating and heat-insulating coating 2 of nano silica gel and a graphene coating 3; the insulated wire 4 penetrates through the hollow needle body 1 and the graphene coating 3 to form a closed loop; the connection points 6-1 and 6-2 of the insulated wire 4 and the graphene coating 3 and the insulated needle handle 7 for lifting and pinching.
The hollow needle body 1 is made of gold, silver or stainless steel materials, the outer diameter is 0.4-0.9 mm, the inner diameter is 0.2-0.5 mm, and the length is 40-100 mm.
The bevel angle of the bevel-mouth needlepoint 5 is set to be 9-17 degrees.
The insulating heat-insulating coating 2 is made of nano silicon dioxide gel, the thickness of the coating is 20-100 mu m, and the length of the coating is 40-100 mm.
The graphene coating 3 is a heat generating area, the thickness of the graphene coating is 5-100 mu m, and the length of the coating is 5-95 mm.
The insulated wire 4 is an enameled copper wire with the diameter of 0.14-0.45 mm.
The insulating heat-insulating coating 2 is adhered through the following steps:
(1) the hollow needle body 1 is polished by fine sand paper to remove impurities, and then is corroded for 0.5-2 minutes by using a mixed acid solution, wherein the mixed acid solution is concentrated hydrochloric acid with the mass fraction of 38%: 68% of concentrated nitric acid by mass: water volume ratio =10:1: 10;
(2) mixing 1 part by weight of nano silicon dioxide gel coating with 1-10 parts by weight of water to obtain a mixed solution, immersing the treated hollow needle body 1 into the mixed solution for 5 minutes, forming a film on the surface of the needle body by a dip-coating method, and drying in an oven at 80 ℃ for 5 hours to form the film;
(3) and (3) repeating the step (2) for 1-5 times to realize the adhesion of films with different thicknesses, and slightly polishing the coating by fine abrasive paper after drying.
The graphene coating 3 is realized by the following steps:
(1) mixing 1 part by weight of graphene coating and 0.1-5 parts by weight of solvent, immersing the hollow needle body 1 attached with the insulating heat-insulating coating 2 into the mixed solution for 10 minutes, determining the immersion depth of the hollow needle body 1 according to the length of the graphene coating 3 required to be attached, forming a layer of film on the surface of the needle body by a dip-coating method, drying in an oven at 85 ℃ for 2 hours to form the film, and keeping the insulating coating 5-10 mm away from the needle handle;
(2) repeating the step (1) for 1-10 times to realize the adhesion of films with different thicknesses, and slightly polishing the coating by fine abrasive paper after drying;
the graphene coating comprises the components of graphene, polyurethane and methyl pyrrolidone, wherein the mass ratio of the graphene to the polyurethane to the methyl pyrrolidone is 2:3: 5;
the solvent is one or more of water, N-methyl pyrrolidone, dimethyl sulfoxide, pyridine, N, N-dimethylformamide, N, N-dimethylacetamide and ethylene glycol which are mixed according to any proportion.
The insulated conductor 4 forms a closed loop, and the construction of the closed loop is realized by the following steps:
(1) the negative insulated wire 4-1 penetrates through the needle tube of the hollow needle body 1 and is exposed from the bevel needle point 5, the hollow insulated wire is folded and wound on the graphene coating 3 from the concave part of the bevel needle point 5, the insulating paint is removed from the wound part of the insulated wire 4-1, the wound part of the insulated wire is electrically connected with the graphene coating 3, and the wound part of the insulated wire is coated with conductive adhesive to form an A connection point 6-1 to increase the firmness of the wound part of the insulated wire and serve as a power source negative electrode interface;
(2) the positive insulated wire 4-2 is embedded in the insulated needle handle 7 and the insulated coating 2, extends to the graphene coating close to the needle handle 7 along the needle body towards the needle point and is wound, the insulated paint is removed from the insulated wire 4-2 at the winding part B, so that the insulated wire is electrically connected with the graphene coating 3, the conductive adhesive is coated on the winding part B to increase the firmness of the insulated wire, and the B connection point 6-2 is formed and serves as a positive power interface.
The electric heating needle can realize higher temperature under the extremely small voltage (0.3-2V), can reach the temperature of 66.8 +/-0.8 ℃ under the drive of the voltage of 0.8V, has shorter balance time, and basically reaches thermal balance within 30 seconds. And the common stainless steel electric heating needle only reaches 41.0 +/-1.2 ℃ under the same voltage (0.8V), and the graphene coating electric heating needle has higher heat production efficiency obviously.
Compared with the existing electric heating needle, the electric heating needle provided by the invention discards the traditional metal heat-generating material, selects the graphene material with excellent electric and heat conducting properties, quickly generates heat at the graphene part after the current is switched on, has heat-generating efficiency superior to that of most metal materials, and does not generate heat when the needle body is not electrified. In addition, the needle handle is simple in structure and convenient for large-scale production, the heat can be effectively isolated from being transferred to the needle handle by using the insulating and heat-insulating material, the operation of a needle applier is prevented from being influenced, the heating range of the needle handle can be adjusted by adjusting the length of the graphene coating, and the tail end of the graphene coating directly contacts the needle body to be connected with a power supply by removing part of the insulating coating.
Drawings
Fig. 1 is a schematic diagram of a total heat type structure of an electric heating needle provided by the present invention.
Fig. 2 is a schematic diagram of a semi-hot structure of the electric heating needle provided by the invention.
Fig. 3 a is a conceptual diagram of the electric heating needle provided by the present invention; fig. 3B is a full-heat type electric heating needle diagram.
FIG. 4A is a time-temperature diagram of the electrothermal needle under different applied voltages; b in fig. 4 is an infrared thermal imaging chart taken by the FLIR infrared thermal imager.
FIG. 5 is a comparison graph of the heat generation effect of the electric heating needle provided by the present invention and the needle body with the same specification.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-2, is a schematic structural view of the electric heating needle provided by the present invention. A graphene coating electric heating needle capable of efficiently generating heat comprises a tubular hollow needle body 1 and an integrated bevel needle point 5; the outer surface of the hollow needle body 1 is coated with an insulating and heat-insulating coating 2 of nano silica gel and a graphene coating 3 in sequence; the insulated wire 4 penetrates through the hollow needle body 1 and the graphene coating 3 to form a closed loop; the connection points 6-1 and 6-2 of the insulated wire 4 and the graphene coating 3 and the insulated needle handle 7 for lifting and pinching. Whether the graphene coating 3 is completely coated or not determines whether the whole hollow needle body 1 is a full-hot type or a half-hot type, and the whole hollow needle body is completely coated with the full-hot type, as shown in fig. 1; the incomplete coating is a semi-hot type, as shown in fig. 2. It can be clearly seen that the electric heating needle has a 3-layer structure, the inner layer is a hollow needle body, the middle layer is a nano silica gel insulating and heat-insulating coating, and the outer layer is a graphene heat-generating coating. The connecting part of the needle root and the needle handle of the full-heat electric heating needle is also coated with 5-10 mm nanometer silica gel to prevent heat from being transferred to the needle handle and influence the operation of a needle applicator.
The hollow needle body 1 is made of gold, silver or stainless steel materials, the outer diameter is 0.4-0.9 mm, the inner diameter is 0.2-0.5 mm, and the length is 40-100 mm.
The bevel angle of the bevel-mouth needlepoint 5 is set to be 9-17 degrees.
The insulating heat-insulating coating 2 is made of nano silicon dioxide gel, the thickness of the coating is 20-100 mu m, and the length of the coating is 40-100 mm.
The graphene coating 3 is a heat generating area, the thickness of the graphene coating is 5-100 mu m, and the length of the coating is 5-95 mm.
The insulated wire 4 is an enameled copper wire with the diameter of 0.14-0.45 mm.
As shown in fig. 3 a and B, a conceptual diagram and a physical diagram of the electrothermal needle of the total heat type are shown. In the figure, the white or gray part is insulating heat-insulating coating, the black part is graphene coating 3, the thicker part of the needle root is an insulating needle handle 7, and a lead is led out from the insulating needle handle 7 and is connected with a power supply. Because the needle body 1 is coated with the insulating coating and the graphene coating in sequence, the heat generating part of the needle body is the graphene coating, so that the heat generating efficiency is higher and is superior to most of the existing electric heating materials; the positive electrode and the negative electrode of the power supply are respectively connected to the upper end and the lower end of the graphene coating through insulated wires, current does not flow through the needle body, the heat production position is accurate, and the temperature is easy to control; the electric heating needle provided by the invention has the advantages of simple structure, convenience in use, safety and reliability, and the needle handle is insulated and does not interfere with the fine operation of a needle applier.
As shown in fig. 4 a and B and fig. 5, which are graphs of heat generation effects of the electric heating needle of the present invention, the electric heating needle can achieve a high temperature at a very low voltage (0.3-2V), can reach a temperature of 66.8 ± 0.8 ℃ under the driving of a voltage of 0.8V, has a short equilibrium time, and substantially achieves thermal equilibrium within 30 seconds. The common stainless steel electric heating needle only reaches 41.0 +/-1.2 ℃ under the same voltage (0.8V), and the graphene coating electric heating needle obviously has higher heat production efficiency.
The adhesion of the insulating thermal barrier coating 2 and the graphene coating 3 and the formation of the closed circuit according to the present invention will be further described with reference to various embodiments.
Example one
The insulating heat-insulating coating 2 is attached to the surface of the hollow needle body 1 through the following steps:
(1) selecting a needle point integrated stainless steel hollow needle body 1 with the length of 80 mm, the inner diameter of 0.5mm, the outer diameter of 0.8 mm and the first inclination angle of the needle point of 9 degrees, polishing the hollow needle body 1 with fine abrasive paper to remove impurities, and then corroding with a mixed acid solution for 1 minute, wherein the mixed acid solution is concentrated hydrochloric acid with the mass fraction of 38 percent: 68% of concentrated nitric acid by mass: water volume ratio =10:1: 10;
(2) mixing 1 part by weight of nano silicon dioxide gel coating with 1 part by weight of water to obtain a mixed solution, immersing the treated hollow needle body 1 into the mixed solution for 5 minutes, forming a film on the surface of the needle body by a dip-coating method, and drying in an oven at 80 ℃ for 5 hours to form the film;
(3) and (3) repeating the step (2) for 5 times to obtain an insulating heat-insulating coating with the thickness of 50 microns and the length of 80 mm, and slightly polishing the coating by fine abrasive paper after drying.
The graphene coating 3 is attached to the surface of the insulating and heat-insulating coating 2 through the following steps:
(1)1 part by weight of graphene coating is mixed with 1 part by weight of water, the hollow needle body 1 attached with the insulating and heat-insulating coating 2 is immersed in the mixed solution for 10 minutes, then a layer of graphene film is formed on the surface of the insulating and heat-insulating coating 2 through a dipping and pulling method, the graphene film is dried in an oven at 85 ℃ for 2 hours to form a graphene coating with the thickness of 5 mu m and the length of 70 mm, the heat-insulating area 10 mm away from the needle handle is kept, and the coating is lightly polished by fine abrasive paper after drying.
The insulated conductor 4 forms a closed loop, and the construction is realized by the following steps:
(1) selecting an enamelled copper wire with the diameter of 0.45mm and the resistivity of 0.107 omega/m as a negative insulated wire 4-1, passing through a hollow needle tube to be exposed from a needle point, turning back and winding the insulated wire on a graphene coating from a concave, winding part of the insulated wire to remove the insulated paint, electrically connecting the insulated wire with the graphene coating to form a connection point 6-1, coating a conductive adhesive on the winding part to increase the firmness of the winding part, and slightly polishing and smoothing the fine abrasive paper to be used as a power supply negative connection wire;
(2) another enamelled copper wire with the same specification is used as an anode insulated wire 4-2 to be embedded in the insulated needle handle and the insulated coating, extends to the needle point along the needle body to the needle point to be close to the graphene coating of the needle handle and is wound, the insulated paint is removed from the wound part of the insulated wire to ensure that the wound part of the insulated wire is electrically connected with the graphene coating, the wound part of the insulated wire is coated with conductive adhesive to increase the firmness of the wound part of the insulated wire, and a connection point 6-2 is formed to be used as a power supply anode connection.
Testing heat production performance: the direct current voltages of 0.3V, 0.5V, 0.8V and 1.0V are respectively applied to the positive pole and the negative pole of the electric heating needle, the test result is shown in figure 4, A in figure 4 is a time-temperature curve, the abscissa is time, the ordinate is temperature, B in figure 4 is an infrared thermal imaging image shot by an FLIR infrared thermal imaging instrument after the electric heating needle is electrified, the graphene coating part can be seen to rapidly generate heat, and the temperature is respectively increased to 35.5 +/-0.2 ℃, 43.3 +/-0.8 ℃, 66.8 +/-0.8 ℃ and 77.0 +/-2.2 ℃ in 3 minutes. And the equilibrium time is short, and the heat balance is basically achieved within 30 seconds. Fig. 5 compares the temperature-time curves at the same lower voltage for the graphene coated electric needle and the hollow needle tubing of the same specification, and it can be seen that at the same voltage (0.8V), the stainless steel electric needle only reaches 41.0 ± 1.2 ℃, while the graphene coated electric needle reaches 66.8 ± 0.8 ℃, showing higher heat production efficiency.
Example two
The insulating heat-insulating coating 2 is attached to the surface of the hollow needle body 1 through the following steps:
(1) selecting a needle point integrated silver hollow needle tube with the length of 100mm, the inner diameter of 0.2 mm, the outer diameter of 0.4 mm and the first inclination angle of the needle point of 11 degrees, polishing the needle tube by using fine sand paper to remove impurities, and then corroding the needle tube for 2 minutes by using a mixed acid solution (concentrated hydrochloric acid with the mass fraction of 38 percent and concentrated nitric acid with the mass fraction of 68 percent: water =10:1: 10);
(2) mixing 1 part by weight of nano silicon dioxide gel coating with 5 parts by weight of water, immersing the needle body into the mixed solution for 5 minutes, forming a film on the surface of the needle body by a dip-coating method, and drying in a drying oven at 80 ℃ for 5 hours to form the film;
(3) repeating the above 5 times to obtain an insulating heat-insulating coating with a thickness of 100 μm and a length of 100mm, and slightly polishing with fine sand paper.
The graphene coating 3 is attached to the surface of the insulating and heat-insulating coating 2 through the following steps:
(1) mixing 1 part by weight of graphene coating with 0.1 part by weight of water, immersing the needle body into the mixed solution for 10 minutes, forming a layer of film on the surface of the needle body by a dip-coating method, and drying in a drying oven at 85 ℃ for 0.5 hour to form the film;
(2) repeatedly coating graphene for 10 times to obtain a graphene coating with the thickness of 100 mu m and the length of 95mm, keeping a heat insulation coating 5mm away from the needle handle, and slightly polishing with fine abrasive paper.
The insulated conductor 4 forms a closed loop, and the construction is realized by the following steps:
(1) an insulated wire with the diameter of 0.14 mm and the resistivity of 1.05 omega/m is selected to penetrate through the hollow needle tube to be exposed from the needle point, the insulated wire is folded and wound on the graphene coating from the concave position, insulating paint is removed from the insulated wire at the winding part, the insulated wire and the graphene coating are electrically connected to form a connection point, the winding part is coated with conductive adhesive to increase the firmness, and fine sand paper is slightly polished and smooth to be used as a power supply negative electrode connection wire;
(2) another insulated wire with the same specification is embedded in the insulated needle handle and the insulated coating, extends to the needle point along the needle body to the graphene coating close to the needle handle and is wound, the insulated paint is removed from the wound part of the insulated wire, so that the wound part of the insulated wire is electrically connected with the graphene coating, the wound part of the insulated wire is coated with conductive adhesive to increase the firmness of the wound part of the insulated wire, and a connection point is formed to be used as a positive connection wire of a power supply.
Testing heat production performance: the heat generating effect is basically similar to the result of the example 1, and the heat generating efficiency is higher.
EXAMPLE III
The insulating heat-insulating coating 2 is attached to the surface of the hollow needle body 1 through the following steps:
(1) selecting a needle point integrated gold hollow needle tube with the length of 100mm, the inner diameter of 0.4 mm, the outer diameter of 0.9mm and the first inclination angle of the needle point of 17 degrees, polishing the needle tube by using fine sand paper to remove impurities, and then corroding the needle tube for 1 minute by using a mixed acid solution (concentrated hydrochloric acid with the mass fraction of 38%: concentrated nitric acid with the mass fraction of 68%: water =10:1: 10);
(2) mixing 1 part by weight of nano silicon dioxide gel coating and 5 parts by weight of water, immersing the needle body into the mixed solution for 5 minutes, forming a film on the surface of the needle body by a dip-coating method, drying in an oven at 80 ℃ for 5 hours to form the film, obtaining an insulating coating with the thickness of 20 mu m and the length of 100mm, and slightly polishing and smoothing by fine abrasive paper.
The graphene coating 3 is attached to the surface of the insulating and heat-insulating coating 2 through the following steps:
(1) mixing 1 part by weight of graphene coating with 2 parts by weight of water, immersing the needle body into the mixed solution for 10 minutes, forming a layer of film on the surface of the needle body by a dip-coating method, and drying in a drying oven at 85 ℃ for 2 hours to form the film;
(2) repeatedly coating graphene for 5 times to obtain a graphene coating with the thickness of 50 mu m and the length of 5mm, and slightly polishing with fine sand paper.
The insulated conductor 4 forms a closed loop, and the construction is realized by the following steps:
(1) an insulated wire with the diameter of 0.25 mm and the resistivity of 0.33 omega/m is selected to penetrate through the hollow needle tube to be exposed from the needle point, the insulated wire is folded and wound on the graphene coating from the concave position, insulating paint is removed from the insulated wire at the winding part, the insulated wire and the graphene coating are electrically connected to form a connection point, the winding part is coated with conductive adhesive to increase the firmness, and fine sand paper is slightly polished and smooth to be used as a power supply negative electrode connection wire;
(2) another insulated wire with the same specification is embedded in the insulated needle handle and the insulated coating, extends to the needle point along the needle body to the graphene coating close to the needle handle and is wound, the insulated paint is removed from the wound part of the insulated wire, so that the wound part of the insulated wire is electrically connected with the graphene coating, the wound part of the insulated wire is coated with conductive adhesive to increase the firmness of the wound part of the insulated wire, and a connection point is formed to be used as a positive connection wire of a power supply.
Testing heat production performance: the heat generating effect is basically similar to the result of the example 1, and the heat generating efficiency is higher.
Example four
The insulating heat-insulating coating 2 is attached to the surface of the hollow needle body 1 through the following steps:
(1) selecting a needle point integrated gold hollow needle tube with the length of 40 mm, the inner diameter of 0.4 mm, the outer diameter of 0.9mm and the first inclination angle of the needle point of 11 degrees, polishing the needle tube by using fine sand paper to remove impurities, and then corroding the needle tube for 1 minute by using a mixed acid solution (concentrated hydrochloric acid with the mass fraction of 38%: concentrated nitric acid with the mass fraction of 68%: water =10:1: 10);
(2) mixing 1 part by weight of nano silicon dioxide gel coating and 5 parts by weight of water, immersing the needle body into the mixed solution for 5 minutes, forming a film on the surface of the needle body by a dip-coating method, drying in an oven at 80 ℃ for 5 hours to form the film, obtaining an insulating coating with the thickness of 20 mu m and the length of 40 mm, and slightly polishing with fine abrasive paper.
The graphene coating 3 is attached to the surface of the insulating and heat-insulating coating 2 through the following steps:
(1) mixing 1 part by weight of graphene coating and 4 parts by weight of N-methyl pyrrolidone, immersing the needle body into the mixed solution for 10 minutes, forming a layer of film on the surface of the needle body by a dip-coating method, and drying in a drying oven at 85 ℃ for 2 hours to form the film;
(2) repeatedly coating graphene for 5 times to obtain a graphene coating with the thickness of 60 mu m and the length of 10 mm, and slightly polishing with fine sand paper.
The insulated conductor 4 forms a closed loop, and the construction is realized by the following steps:
(1) an insulated wire with the diameter of 0.28 mm and the resistivity of 0.27 omega/m is selected to penetrate through the hollow needle tube to be exposed from the needle point, the insulated wire is folded and wound on the graphene coating from the concave position, insulating paint is removed from the insulated wire at the winding part, the insulated wire and the graphene coating are electrically connected to form a connection point, the winding part is coated with conductive adhesive to increase the firmness, and fine sand paper is slightly polished and is used as a power supply negative electrode interface;
(2) another insulated wire with the same specification is embedded in the insulated needle handle and the insulated coating, extends to the needle point along the needle body to the graphene coating close to the needle handle and is wound, the insulated paint is removed from the wound part of the insulated wire, so that the wound part of the insulated wire is electrically connected with the graphene coating, the wound part of the insulated wire is coated with conductive adhesive to increase the firmness of the wound part of the insulated wire, and a connection point is formed to serve as a positive interface of the power supply.
Testing heat production performance: the heat generating effect is basically similar to the result of the example 1, and the heat generating efficiency is higher.
EXAMPLE five
The insulating heat-insulating coating 2 is attached to the surface of the hollow needle body 1 through the following steps:
(1) selecting a needle point integrated stainless steel hollow needle tube with the length of 50 mm, the inner diameter of 0.3 mm, the outer diameter of 0.8 mm and the first inclination angle of the needle point of 11 degrees, polishing the needle tube by using fine sand paper to remove impurities, and then corroding the needle tube for 0.5 minute by using a mixed acid solution (concentrated hydrochloric acid with the mass fraction of 38%: concentrated nitric acid with the mass fraction of 68%: water =10:1: 10);
(2) mixing 1 part by weight of nano silicon dioxide gel coating with 10 parts by weight of water, immersing the needle body into the mixed solution for 5 minutes, forming a film on the surface of the needle body by a dip-coating method, and drying in a drying oven at 80 ℃ for 5 hours to form the film;
(3) the above 2 times were repeated to obtain an insulating coating having a thickness of 30 μm and a length of 50 mm, which was lightly sanded with fine sandpaper.
The graphene coating 3 is attached to the surface of the insulating and heat-insulating coating 2 through the following steps:
(1) mixing 1 part by weight of graphene coating and 5 parts by weight of water/N-methylpyrrolidone (volume ratio 1/1), immersing the needle body into the mixed solution for 10 minutes, forming a layer of film on the surface of the needle body by a dip-coating method, and drying in an oven at 85 ℃ for 2 hours to form the film;
(2) repeatedly coating graphene for 10 times to obtain a graphene coating with the thickness of 80 mu m and the length of 45mm, keeping a heat insulation coating 5mm away from the needle handle, and slightly polishing with fine abrasive paper.
The insulated conductor 4 forms a closed loop, and the construction is realized by the following steps:
(1) an insulated wire with the diameter of 0.25 mm and the resistivity of 0.33 omega/m is selected to penetrate through the hollow needle tube to be exposed from the needle point, the insulated wire is folded and wound on the graphene coating from the concave position, insulating paint is removed from the insulated wire at the winding part, the insulated wire and the graphene coating are electrically connected to form a connection point, the winding part is coated with conductive adhesive to increase the firmness, and fine sand paper is slightly polished and is used as a power supply negative electrode interface;
(2) another insulated wire with the same specification is embedded in the insulated needle handle and the insulated coating, extends to the needle point along the needle body to the graphene coating close to the needle handle and is wound, the insulated paint is removed from the wound part of the insulated wire, so that the wound part of the insulated wire is electrically connected with the graphene coating, the wound part of the insulated wire is coated with conductive adhesive to increase the firmness of the wound part of the insulated wire, and a connection point is formed to serve as a positive interface of the power supply.
Testing heat production performance: the heat generating effect is basically similar to the result of the example 1, and the heat generating efficiency is higher.
The above-described embodiments are only for illustrating the present invention and should not be construed as limiting the present invention, and any modifications and changes made to the present invention within the scope of the claims of the present invention are within the scope of the present invention.
Claims (5)
1. The high-efficiency heat-generating graphene coating electric heating needle is characterized by comprising a tubular hollow needle body (1), an inclined-mouth needle point (5) integrated with the tubular hollow needle body (1) and an insulating needle handle (7) used for lifting and pinching; the outer surface of the hollow needle body (1) is sequentially attached with an insulating heat-insulating coating (2) and a graphene coating (3); an insulated wire (4) penetrates through the hollow needle body (1) and forms a closed loop with the graphene coating (3); the insulated wire (4) and the graphene coating (3) are provided with a connection point A (6-1) and a connection point B (6-2);
the insulating and heat-insulating coating (2) is nano silicon dioxide gel, coating is started from the needle point of the hollow needle body (1), the coating thickness is 20-100 mu m, and the length is 40-100 mm;
the graphene coating (3) is a heat generating area, the thickness of the graphene coating is 5-100 mu m, and the length of the graphene coating is 5-95 mm;
the insulated wire (4) comprises a negative insulated wire (4-1) and a positive insulated wire (4-2), the negative insulated wire (4-1) passes through the needle tube of the hollow needle body (1) and is exposed from the bevel needle point (5), the negative insulated wire is folded and wound on one end, close to the needle point, of the graphene coating (3) from the concave part of the bevel needle point (5), insulating paint is removed from the negative insulated wire (4-1) at the winding part, the negative insulated wire is electrically connected with the graphene coating (3), and the winding part is coated with conductive adhesive to form an A connection point (6-1) to increase the firmness of the negative insulated wire to serve as a power supply negative electrode interface; the positive insulated wire (4-2) is embedded in the insulated needle handle (7) and the insulated heat-insulating coating (2), the positive insulated wire (4-2) is wound with one end of the graphene coating, which is close to the needle handle (7), the insulated paint of the positive insulated wire (4-2) at the winding part is removed, so that the positive insulated wire is electrically connected with the graphene coating (3), the winding part is coated with conductive adhesive to increase the firmness of the positive insulated wire, and a B connection point (6-2) is formed to serve as a positive power supply interface;
the graphene coating (3) is realized by the following steps:
(1) mixing 1 part by weight of graphene coating and 0.1-5 parts by weight of solvent to obtain a mixed solution, wherein the solvent is one or more of water, N-methylpyrrolidone, dimethyl sulfoxide, pyridine, N, N-dimethylformamide, N, N-dimethylacetamide and ethylene glycol which are mixed according to any proportion; immersing the hollow needle body (1) attached with the insulating heat-insulating coating (2) into the mixed solution for 10 minutes, wherein the immersion depth of the hollow needle body (1) is determined by the required length of the graphene coating (3), then forming a layer of film on the surface of the needle body by using a dip-coating method, and drying the film in an oven at 85 ℃ for 2 hours to form the film;
(2) and (3) repeating the step (1) for 1-10 times to realize the adhesion of graphene coatings with different thicknesses, and lightly polishing the graphene coatings by fine abrasive paper after drying.
2. The graphene-coated electric heating needle capable of efficiently generating heat according to claim 1, wherein the hollow needle body (1) is made of gold, silver or stainless steel, and has an outer diameter of 0.4 mm to 0.9mm, an inner diameter of 0.2 mm to 0.5mm, and a length of 40 mm to 100 mm.
3. The graphene-coated electric heating needle generating heat efficiently as claimed in claim 1, wherein the bevel angle of the beveled tip (5) is set to 9 ° -17 °.
4. The graphene-coated electric heating needle generating heat efficiently according to claim 1, wherein the insulating thermal barrier coating (2) is attached by the following steps:
(1) the hollow needle body (1) is polished by fine sand paper to remove impurities, and then is corroded for 0.5 to 2 minutes by using a mixed acid solution, wherein the mixed acid solution is formed by mixing concentrated hydrochloric acid with the mass fraction of 38 percent, concentrated nitric acid with the mass fraction of 68 percent and water in a volume ratio of 10:1: 10;
(2) mixing 1 part by weight of nano silicon dioxide gel coating with 1-10 parts by weight of water to obtain a mixed solution, immersing the treated hollow needle body (1) into the mixed solution for 5 minutes, forming a film on the surface of the needle body by a dip-coating method, and drying the hollow needle body (1) in an oven at 80 ℃ for 5 hours to form an insulating and heat-insulating coating (2);
(3) and (3) repeating the step (2) for 1-5 times to realize the adhesion of the insulating and heat-insulating coating (2) with different thicknesses, and slightly polishing the insulating and heat-insulating coating (2) by fine abrasive paper after drying.
5. The graphene-coated electric heating needle generating heat efficiently according to claim 1, wherein the insulated wire (4) is an enameled copper wire with a diameter of 0.14 mm to 0.45 mm.
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| CN111658511B (en) * | 2020-06-02 | 2022-05-06 | 西安交通大学 | Hollow loop type electric heating needle with adjustable heating position |
| CN113178297B (en) * | 2021-03-19 | 2023-03-10 | 深圳市博迪科技开发有限公司 | Preparation method of heating needle insulating layer and heating needle |
| CN114404675B (en) * | 2022-01-28 | 2023-04-07 | 上海派拉纶生物技术股份有限公司 | Biocompatible coating for insulation protection of medical needle |
| KR102428856B1 (en) * | 2022-02-23 | 2022-08-02 | 김숙연 | Heating needle and manufacturing method whichof |
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| CN107714447A (en) * | 2017-10-13 | 2018-02-23 | 岳桂华 | A kind of smokeless graphene heating film moxibustion device |
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| CN87201248U (en) * | 1987-04-15 | 1988-03-09 | 孙才达 | Electric heat needle for acupuncture |
| CN2877672Y (en) * | 2005-12-31 | 2007-03-14 | 赵国滨 | Far infrared acupuncture needle |
| CN205434361U (en) * | 2015-12-21 | 2016-08-10 | 林栋� | Acupuncture needle warm in nature once based on self -heating material |
| CN108294942A (en) * | 2018-02-09 | 2018-07-20 | 张克 | A kind of bionical acupuncture and moxibustion device |
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| CN2119224U (en) * | 1991-10-25 | 1992-10-21 | 王隽田 | Thermostatic electric acupuncture and moxibustion instrument |
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