TWI343359B - Flexible nano electrothermal material and heating apparatus having the same - Google Patents

Description

1343359 1st, 21st, 100th, 1st, 1st, 1st, 1st, 6th, 1st, 1st, 1st, 1st, 1st, 1st, 1st, 1st, 1st A meter of flexible electrothermal material, and a heating device using the nanometer flexible electrothermal material. [Prior Art] [0002] An electrothermal material refers to a material that can convert electrical energy into thermal energy by its own resistance. Usually, the electrothermal material is made of a metal such as a tungsten wire, a molybdenum sheet or the like, or a semiconductor such as a tantalum carbon rod or the like. Since metals have good electrical conductivity, the resistance is usually small, so high power and temperature can be produced. [0003] However, electrothermal materials composed of metals or semiconductors also have obvious disadvantages, such as these materials are not freely deformable at normal temperature; and the resistance is usually low, the power is too large, and the amount of heat is too high, which is not suitable for use in a normal temperature range. Metals have poor affinity for the human body, and even certain metals such as copper can cause harm to humans. Therefore, these electrothermal materials are not suitable for use in heating and heat-insulating devices that are in close contact with the human body, such as electric blankets, electric heating pads, and the like. [0004] Thus, an electrothermal material in which a conductive particle such as a metal powder, a graphite powder or the like is added to a polymer material substrate is developed, and the electrothermal material has flexibility, and the electric resistance thereof can be relatively high, and can be used for low-temperature heating, but In order to achieve a suitable electrical conductivity, the content of the conductive particles needs to be high, thus causing a decrease in the strength of the substrate material. In view of the above, it is necessary to provide an electrothermal material which is flexible and freely deformable, has high mechanical strength, high human affinity, and can be used in a low temperature range. 095121702 Form No. A0101 Page 3/Total 12 Page 1003097663-0 ^343359 Correction of Foods by March 21, 2001 [Invention] [0006] Hereinafter, a nano flexible electrothermal material will be described by way of example, and a A heating device for nano flexible electrothermal materials. The carbon nanotubes are in the form of a plurality of carbon nanotubes, wherein the carbon nanotubes are present in a weight percentage of 0.1% to 4%, and the plurality of carbon nanotubes are The substrate is uniformly dispersed, and the plurality of carbon nanotubes are overlapped with each other to form a conductive network, and the substrate is a flexible polymer material. [0008] A heating device comprising a nano-soft-spotted edge-drilling oblique, two wires and a *---f, two--' switch, the two wires are connected to the power supply

, the switch An Guangtai the two conductive materials including flexible polymer wood

1UU nano-flexible in the base of the plurality of carbon nanotubes, the carbon nanotubes in the base 成# into a conductive network [0009] due to the flexible polymer substrate material 4_g|

It can be bent at will and has a good /5:1⁄2 ^ Ί Ί; νί艮 according to the content of the carbon nanotubes, its resistance is adjustable, Qin ^ release 1 € when the amount is low, its resistance can be adjusted to a higher Value, so that it is suitable for low-temperature heating; and because of the addition of a carbon nanotube and forming an electrically conductive network inside the flexible polymer substrate material, in addition to being used for electrical conduction, the nano-flexible electrothermal material is uniformly heated over the entire material. In addition, the strength of the nano flexible electrothermal material can also be increased. [Embodiment] Referring to Fig. 1, a nano-flexible electrocaloric material 1 of the first embodiment comprises a flexible high molecular base material 10 and a plurality of carbon nanotubes 12 dispersed in a flexible polymer base material 10. The carbon nanotubes 12 overlap each other in the flexible polymer base 095121702 Form No. 1010101 Page 4 / Total 12 pages 1003097663-0 1343359 _ ' 03 March 21, 2011 Correction of the replacement of π bottom material 10 0 to form a conductive network Therefore, the nano-flexible electrothermal material 1 can be electrically conductive, and can be heated after being energized. [0011] The flexible polymer base material 10 may be selected from one of a ruthenium rubber elastomer, a polyurethane, an epoxy resin, or a combination thereof. The carbon nanotube 12 can be a multi-walled carbon nanotube or a single-walled carbon nanotube. 1%〜4%。 The length of the entire electrothermal material is 0.1% ~ 4%. The electrical resistivity of the electrothermal material is also different when the content of the carbon nanotubes 12 is different. [0012] More specifically, please refer to FIG. 2, which is a graph showing the relationship between the content of the carbon nanotubes and the resistivity in the nanometer flexible electrothermal material 1. It can be seen that the nano-flexible electrothermal material 1 decreases in resistivity with the weight percentage of the carbon nanotubes, and the content is 0.4%, the resistivity is approximately 10 ohm·m (Ω · m), and the carbon nanotube content is When the content is less than 1%, the resistivity decreases faster, and then the rate of decline is slower. When the carbon nanotube content reaches 4%, the resistivity drops to a lower level, which is approximately 0.1 ohm·m (Ω·ιη). [0013] Various additives may be added to the nano-flexible electrothermal material 1 to improve the physical and chemical properties of the material, such as an antioxidant _, a flame retardant. There are many varieties of antioxidants, such as nitrogen, nitrogen-di-/3-mercapto-p-phenylenediamine. The flame retardant may be selected from the group consisting of gasified paraffin, gasified alicyclic hydrocarbon, tetra-glycolic acid anhydride, phosphate ester, tooth-containing phosphate ester, phosphorus halide, phosphorus polyol and functional anhydride, and the content of the flame retardant may be It is 1%~10%. [0014] The nano-flexible electrocaloric material 1 of the present embodiment has the following features: 1. Since a flexible polymer base material is used, it can be arbitrarily deformed, and the polymer material is more human-friendly than metal or semiconductor. [0016] 2. Due to the addition of the carbon nanotubes, the mechanical toughness is enhanced, and the strength is increased by 095121702. Form No. 1010101 Page 5 of 12 1003097663-0 -1343359 [0018] [0019] [0020] 0021] 095121702 On March 21, 100, the nuclear replacement is high, not easy to damage, and at the same time has suitable thermal conductivity, which can quickly transfer the heat generated inside. 3. The resistance can be adjusted within a certain range, and the entire surface of the electrothermal material is uniformly heated at the same time, and the temperature can be controlled at a low level, such as lower than 100 ° C, so the nano flexible electric heating material of the embodiment does not cause Overheating creates a hazard. The temperature of the electrothermal material used to insulate the human body can be controlled to a lower temperature, for example, between 36 ° C and 40 ° C. For example, a nanometer flexible electrothermal material of 30x30x0.05 cm has a carbon nanotube content of 2.5%, and is electrically conductive along the membrane surface with a power supply of 3 6 V, which is less than 1 watt. .J. : Based on the above characteristics, the inch will not be real | low in various needs: every heating collar, physiotherapy electric heating, slimming waist

Application of Thermal Material 1 *Electrothermally The nano-flexible electrocaloric material 1 of the present embodiment can be prepared by the following method: Step 1, providing a uniformly dispersed pre-dissolved k-pre-polymer monomer solution. The prepolymer material is further entangled with a polymeric substrate, such as a ΤΌΠβΓΓ^ material, such as a ruthenium rubber elastomer, a polyester/polyoxy resin prepolymer/!..mice, a monomer, or a combination thereof. Taking polyurethane as an example, the prepolymer of polyurethane is dissolved and diluted with a solvent such as ethyl acetate to reduce its viscosity, and then ultrasonically washed for a period of time to obtain a uniformly dispersed polyurethane prepolymer solution. Step 2, adding a carbon nanotube The above solution was dispersed with ultrasonic waves for a while. 1〜4%。 The weight percentage of the carbon nanotubes is 0. 1~4%. The effect of ultrasonic dispersion is to enable the carbon nanotubes to be initially dispersed in the polyurethane prepolymer solution. The carbon nanotubes can be multi-walled carbon nanotubes or single-walled naphthalene. Form No. A0101 Page 6 of 12 1003097663-0

1343359 • > Correction and replacement page on March 21, 100. The preparation method of carbon nanotubes and carbon nanotubes can be carried out by chemical vapor deposition, arc discharge, laser ablation, etc. in the prior art. The carbon nanotubes can be from 1 to 10 microns in length. [0022] In addition, since the carbon nanotubes are easily aggregated and entangled, it can be further broken by a sonicator for a period of time to separate the aggregated and entangled carbon nanotubes, and then dispersed by ultrasonic waves for a period of time. The carbon nanotubes are dispersed more evenly. [0023] In step 3, an initiator is added to cause the prepolymer solution or the prepolymer monomer solution to react or crosslink to polymerize and solidify into a desired shape for practical use. The choice of initiator varies depending on the prepolymer material, which can be deionized water for the polyurethane. The appropriate ultrasonic cleaning is used for a period of time to collect the creamy substance formed in the solution to obtain a pre-processed material of the composite material. [0024] Preferably, the electrodes 311, 312 can be buried at both ends before curing, so that the nano-flexible electrothermal material can be obtained as shown in FIG. 3, and the materials of the electrodes 311 and 312 can be made of a metal having high conductivity such as copper. Or aluminum. [0025] Referring to FIG. 4, the electric heating device of the embodiment includes a nanometer flexible electrothermal material, wires 421 and 422, and a switch 43. Two electrodes 411 and 412 are buried at both ends of the nanometer flexible electrothermal material, and the wires 421 and 422 are respectively used. The electrodes 411, 41 2 are connected to the power source 44. The switch 43 can be disposed on any of the wires 421 and 422. In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Anyone familiar with this 095121702 Form No. A0101 Page 7 / Total 12 Page 1003097663-0 1343359 The equivalent modification or change made by the person in accordance with the spirit of the invention in the spirit of the invention shall be covered by the person who is in the spirit of the invention. It is within the scope of the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS [0027] FIG. 1 is a schematic cross-sectional view of a nano-flexible electrothermal material of the first embodiment. 2 is a graph showing the relationship between the carbon nanotube content and the resistivity in the nano flexible electrothermal material of the first embodiment. 3 is a schematic cross-sectional view of a nano flexible electrothermal material of the second embodiment. 4 is a % view of the first embodiment of the heating device. d

[Main component symbol description] [0031] Substrate: 10 [0032] Carbon nanotube: 12 [0033] Electrode: 311, 312, 411, 412 [0034] Conductor: 421, 422 [0035] Switch: 43 [0036] Power supply 44:

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095121702 Form No. A0101 Page 8 of 12 1003097663-0

Claims (1)

1343359 » » On March 21, 100, Junzheng replaced W. VII. Patent application scope: 1 · A nano-flexible electrothermal material comprising a substrate and a plurality of carbon nanotubes dispersed in the substrate, the carbon nanotubes thereof The weight percentage is 〇·, the plurality of carbon nanotubes are uniformly dispersed in the substrate, and the plurality of carbon nanotubes are overlapped with each other to form a conductive network, and the substrate is a flexible south molecular material. 2. If you apply for a patent scope! The nano flexible electrothermal material according to the invention, wherein the flexible polymer material is one of or a combination of a stellite, a polyurethane, an epoxy resin, or a combination thereof. 3. The nanometer flexible electrothermal material according to claim 1, wherein. The Xuanbei rice tube is a single-walled carbon tube or a multi-walled carbon tube. 4. The nanometer flexible electrothermal material according to claim 1, wherein the carbon nanotube has a length of 10 micrometers. ' 5 The nano flexible electrothermal material described in claim 1 of the patent application, further comprising an additive. 6. The nanometer flexible electrothermal material according to claim 5, wherein the secret additive is a flame retardant selected from the group consisting of a gasification domain, a k-lipid hydrocarbon, a tetra-phthalic anhydride, and a phosphoric acid. 7. A vinegar, a sulphuric acid-containing, a phosphorus-containing, a phosphorus-polyol, and a halogenated acid anhydride. 7. The nanometer flexible electrothermal material according to claim 6, wherein the flame retardant is present in a percentage by weight. It is 1%~1〇%. 8. A heating device comprising: two wires and a switch of a nano-flexible electrothermal material, the two wires being used for connecting the nano-flexible electrothermal material to a power source, the switch being mounted on any one of the two wires The nano-flexible electrothermal material comprises a substrate composed of a flexible polymer material and a composite 095121702 dispersed in the substrate. Form No. A0101 Page 9/Total 2 Page 1003097663-0 1343359 100 March 21 The carbon nanotubes, wherein the carbon nanotubes have a weight percentage of 〇. 1/6 to 4%, the plurality of carbon nanotubes are uniformly dispersed in the substrate, and the plurality of carbon nanotubes are overlapped with each other in the substrate. Conductive network. 9 The nanometer flexible electrothermal material according to claim 8, wherein the nanometer flexible electrothermal material is provided with two electrodes at both ends thereof to be electrically connected to the two electrodes. Person < ,’’ knife :View,: ;;r- infellectual Property 〆‘·,, Γ Γι’ * ?^jnice · 095121702 Form No. A0101 Page 10 of 12 1003097663-0