CN101254915B - High-voltage electric field treating apparatus for preparing area vertically aligned nano carbon tube - Google Patents
High-voltage electric field treating apparatus for preparing area vertically aligned nano carbon tube Download PDFInfo
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- CN101254915B CN101254915B CN2008100605475A CN200810060547A CN101254915B CN 101254915 B CN101254915 B CN 101254915B CN 2008100605475 A CN2008100605475 A CN 2008100605475A CN 200810060547 A CN200810060547 A CN 200810060547A CN 101254915 B CN101254915 B CN 101254915B
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Abstract
A high-voltage electric field treating device for preparing vertical alignment of carbon nanotube comprises a DC adjustable high voltage supply 1, a volt meter 10, an anode metal plate 3, a cathode metal plate 7, an infrared lamp 5 and a base 8. The adjustable high voltage supply 1 is connected with the anode metal plate 3 and the cathode metal plate 7 through wire 2. Two pole plates of the anodemetal plate 3 and the cathode metal plate 7 are horizontally disposed in parallel and have an adjustable space of 2-5 cm. The area of the metal pole plates is larger than or equal to that of a substrate 6 printed with a carbon nanotube layer. The high-voltage electric field treating device can obtain the carbon nanotubes vertical alignment on a large-area substrate and is simple in treatment device and convenient in operation.
Description
Technical field
The present invention relates to a kind of CNT (carbon nano-tube) that is used for, particularly relate to the high-voltage electric field treating apparatus that is used to prepare area vertically aligned nano carbon tube.
Background technology
Since Iijima in 1991 has found CNT (carbon nano-tube) (CNT), it becomes countries in the world scientist's research focus with the accurate one-dimentional structure of its uniqueness, excellent physics-chem characteristic and superpower mechanical property.CNT (carbon nano-tube) (CNT) has the characteristic of emitting electrons, top end diameter is a nanometer scale (1～10nm), can be than other material in the lower emitting electrons under the electric field that excites, different with other thermoelectron, thermion electron emission situation is, need not the electronics among the CNT is applied extra energy (as luminous energy, heat energy or electric energy etc.), cause emission thereby formed awkward silence at a meeting.With CNT make field emission cold cathode have the field emission of plain metal negative electrode incomparable some advantages: the electric field of formation is emitting electrons more easily, low negative electrode power consumption, without preheating postpones, high-density is integrated, and emission is big, electronics initial velocity narrowly distributing, can under low voltage, work etc., therefore, CNT is the best replacer of Spindt metal micro-needle point, is considered to one of ideal field electron emission materials.The research of at present relevant CNT field emission performance aspect has become the heat subject in this field, CNT has wide application prospect at aspects such as field emitting electronic source, field emission displays and feds, especially in Field Emission Display (FED), because it not only can improve the performance of field emission displays, as have lower cut-in voltage and a bigger field emission, and energy consumption is low, low cost of manufacture, is therefore more come into one's own.
Be further to improve the field emission performance of CNT (carbon nano-tube), the researchist has carried out a large amount of experiments, studies show that the field emission performance of CNT (carbon nano-tube) is relevant with its orientation, has than other perpendicular to the CNT (carbon nano-tube) of substrate to be orientated bigger field emissive power.The epitaxial growth process of the vertical orientated CNT (carbon nano-tube) of preparation is that using plasma strengthens the acquisition of chemical vapour deposition (PECVD) method at present.The shortcoming for preparing vertical orientated CNT (carbon nano-tube) with plasma enhanced chemical vapor deposition (PECVD) method has two: 1) the PECVD method prepares vertical orientated CNT (carbon nano-tube) and must carry out in silica tube, owing to the diameter of silica tube is difficult to big reason, it is very little to obtain the vertical orientated substrate area of CNT (carbon nano-tube), generally is not more than 10 * 10cm; 2) the legal temperature to growing nano carbon pipe of PECVD is higher than 600 ℃, substrate necessary high temperature resistant (greater than 600 ℃), and the existing silicon chip that uses mostly costs an arm and a leg.The application that this has had a strong impact on CNT (carbon nano-tube) emission on the scene aspect has restricted the Application Areas of CNT (carbon nano-tube).
Summary of the invention
In order to overcome the deficiency of existing technology of preparing, the invention provides a kind of high-voltage electric field treating apparatus for preparing area vertically aligned nano carbon tube, its adopts high-voltage electric field treatment process, makes CNT (carbon nano-tube) become major part and even all vertical orientated by original lack of alignment under 400 ℃ of temperature not being higher than.
The invention provides and be used to prepare the vertical orientated high-voltage electric field treating apparatus of CNT (carbon nano-tube), mainly form by direct current adjustable high voltage power supply, voltmeter, anode metal plate, cathodic metal plate, infrared(ray)lamp and pedestal, the output terminal positive and negative electrode that it is characterized in that described direct current adjustable high voltage power supply connects anode metal plate and cathodic metal plate through lead respectively, two pole plate horizontal parallel are placed, be fixed on the abase frame, spacing is adjustable between 2～5cm, and the area of metal polar plate is more than or equal to the substrate area that is printed with the CNT (carbon nano-tube) layer.
The cathode output end of direct current adjustable high voltage power supply of the present invention connects shorting bar, and short circuit metal sheet anode after finishing dealing with for the substrate high-voltage electric field that is printed with the CNT (carbon nano-tube) layer is so that residual electrion is guaranteed the safety the when operator takes out substrate.
The invention provides high-voltage electric field treating apparatus, the high-voltage electric field treatment step that is used for the vertical orientated preparation of CNT (carbon nano-tube) is: the substrate that will be printed with the CNT (carbon nano-tube) layer is placed on the cathodic metal plate of high-voltage electric field treating apparatus, open the direct current adjustable high voltage power supply, regulating voltage to 5～15KV, make strength of electric field reach 2～5KV/cm, use infrared(ray)lamp heated baking to 100～150 ℃ simultaneously, kept 15～30 minutes, under the effect of highfield power, the CNT (carbon nano-tube) layer is orientated the CNT (carbon nano-tube) major part of random alignment and even all becomes vertical orientated arrangement and setting on the substrate, then, close the direct current adjustable high voltage power supply, with shorting bar short circuit metal sheet anode, make residual electrion, take out substrate.
The substrate preparation process that is printed with the CNT (carbon nano-tube) layer of the present invention is: the CNT (carbon nano-tube) behind the purifying is dropped in the salpeter solution, put 70～80 ℃ of heating in water bath, 60～90 minutes time was cut off the big CNT (carbon nano-tube) of length-to-diameter ratio, usefulness deionized water rinsing, drying; Acetate butyl 90～98 weight % are become organic adhesive with soluble cotton 2～10 weight % mixed dissolutions, then with the CNT (carbon nano-tube) of organic adhesive and cut-out by weight 90～98% and 2～10% hybrid modulation form slurry, use method for printing screen, slurry is printed on the substrate.
The thermal bake-out substrate that adds of the present invention is the substrate after the high-voltage electric field processing to be placed on stoving oven be heated to 350～400 ℃ in air atmosphere, soaking time 20～40 minutes.
The invention has the beneficial effects as follows: adopt high-voltage electric field treating apparatus of the present invention, it is vertical orientated to obtain CNT (carbon nano-tube) on large-area substrates, and the vertical orientated area of CNT (carbon nano-tube) can be greater than 10 * 10cm, and treatment unit is simple, and working method is convenient.
Preparation temperature of the present invention is lower than 400 ℃, because preparation temperature is low, and non-refractory materials such as substrate useable glass, working method is simple and convenient, low cost of manufacture, preparation process is easy to control.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1-direct current adjustable high voltage power supply 2-terminal stud 3-anode metal plate 4-synthetic glass pole 5-infrared(ray)lamp 6-is printed with the substrate 7-cathodic metal plate 8-pedestal 9-shorting bar 10-voltmeter of CNT (carbon nano-tube).
Embodiment
Referring to accompanying drawing 1, high-voltage electric field treating apparatus is made up of direct current adjustable high voltage power supply 1, voltmeter 10, anode metal plate 3, cathodic metal plate 7, infrared(ray)lamp 5 and pedestal 8, direct current adjustable high voltage power supply 1 connects anode metal plate 3 and cathodic metal plate 7 by high pressure resistant cable through terminal stud 2, anode metal plate 3 is fixed on the support of pedestal 8 with cathodic metal plate 7, two pole plate horizontal parallel are placed, adjustable between spacing 2～5cm, the area of metal polar plate is more than or equal to substrate 6 areas that are printed with CNT (carbon nano-tube).
High-voltage electric field treating apparatus is used for the area vertically aligned nano carbon tube preparation process: the first step is printed with the substrate preparation of CNT (carbon nano-tube) layer: 8 grams of the CNT (carbon nano-tube) behind the purifying are dropped into salpeter solution, put 75 ℃ of heating of water-bath and cut off the big CNT (carbon nano-tube) of length-to-diameter ratio in 80 minutes, usefulness deionized water rinsing, drying; Then acetate butyl 84.6 grams are become organic adhesive with soluble cotton 7.4 gram mixed dissolutions, be mixed into the printing slurry with cut-out back CNT (carbon nano-tube), use method for printing screen, slurry is printed on the glass substrate that area is 20 * 15cm, form the substrate 6 of nano-carbon tube coating; The second step high-voltage electric field is handled: be placed on the cathodic metal plate 7 in the high-voltage electric field treating apparatus with the glass substrate 6 that is about to be printed with CNT (carbon nano-tube), the area of anode metal plate 3 and cathodic metal plate 7 is more than or equal to 20 * 15cm, the two-plate spacing is adjusted to 4cm, open direct current adjustable high voltage power supply 1, voltmeter 10 transfers to 9KV (strength of electric field is 2.25KV/cm), be printed with the substrate 6 of CNT (carbon nano-tube) simultaneously with infrared(ray)lamp 3 baking heating, by room temperature Heating temperature to 120 ℃, soaking time 20 minutes, close direct current adjustable high voltage power supply 1, with shorting bar 9 short circuit metal sheet anodes 3, make residual electrion, take out substrate 6; The 3rd one-step baking is handled: high-voltage electric field is handled metacoxa 6 place the roasting kiln roasting, maturing temperature is 360 ℃, soaking time 25 minutes, and the volatilization organic adhesive obtains vertical orientated CNT (carbon nano-tube).The vertical orientated situation of CNT (carbon nano-tube) is measured 90% the vertical orientated arrangement of CNT (carbon nano-tube) on the display base plate plane as a result with scanning electronic microscope.
With with embodiment 1 identical operations, difference be in, high-voltage electric field treating apparatus two metal polar plate spacings are adjusted to 3cm, regulate direct current adjustable high voltage power supply voltage to 10KV (strength of electric field is 3.3KV/cm).The vertical orientated situation of CNT (carbon nano-tube) is measured 92% vertical orientated arrangement of CNT (carbon nano-tube) on the display base plate plane as a result with scanning electronic microscope.
Claims (3)
1. one kind is used to prepare the vertical orientated high-voltage electric field treating apparatus of CNT (carbon nano-tube), it is characterized in that: mainly be made up of direct current adjustable high voltage power supply (1), voltmeter (10), anode metal plate (3), cathodic metal plate (7), infrared(ray)lamp (5), shorting bar (9) and pedestal (8); Described adjustable high voltage power supply (1) connects anode metal plate (3) and cathodic metal plate (7) through lead; Two pole plate horizontal parallel of described anode metal plate (3) and cathodic metal plate (7) are placed, and are fixed on the abase frame, and spacing is adjustable between 2～5cm; The area of described two metal polar plates is more than or equal to the substrate that is printed with the CNT (carbon nano-tube) layer (6) area.
2. high-voltage electric field treating apparatus according to claim 1, it is characterized in that: the cathode output end of direct current adjustable high voltage power supply (1) connects shorting bar (9), finish dealing with the back in order to short circuit metal sheet anode, so that residual electrion for the substrate high-voltage electric field that is printed with the CNT (carbon nano-tube) layer.
3. high-voltage electric field treating apparatus according to claim 1, it is characterized in that: the step that high-voltage electric field treating apparatus is used for the high-voltage electric field processing of the vertical orientated preparation of CNT (carbon nano-tube) is: the substrate (6) that will be printed with CNT (carbon nano-tube) is placed on the cathodic metal plate (7) of high-pressure treatment apparatus, open DC high-voltage power supply (1), regulating voltage 5～15KV, strength of electric field is 2～5KV/cm, use infrared(ray)lamp (5) heated baking to 100～150 ℃ simultaneously, soaking time 15～30 minutes, under the effect of highfield power, the substrate (6) that is printed with CNT (carbon nano-tube) is gone up the CNT (carbon nano-tube) major part of orientation random alignment and even is all become vertical orientated arrangement, close direct current adjustable high voltage power supply (1), with shorting bar (9) short circuit anode metal plate (3), make residual electrion, take out the substrate (6) that is printed with CNT (carbon nano-tube).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100605475A CN101254915B (en) | 2008-03-27 | 2008-03-27 | High-voltage electric field treating apparatus for preparing area vertically aligned nano carbon tube |
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| CN2008100605475A CN101254915B (en) | 2008-03-27 | 2008-03-27 | High-voltage electric field treating apparatus for preparing area vertically aligned nano carbon tube |
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| CN101254915A CN101254915A (en) | 2008-09-03 |
| CN101254915B true CN101254915B (en) | 2010-10-06 |
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| CN106904572A (en) * | 2017-03-29 | 2017-06-30 | 青岛科技大学 | A kind of CNT electric field orienting device |
| CN111150858A (en) * | 2020-03-12 | 2020-05-15 | 晋江纳创新环境技术有限公司 | High-pressure sterilization self-cleaning device for metal keys |
| CN111825347A (en) * | 2020-07-03 | 2020-10-27 | 广东工业大学 | Device and method for orienting glass flakes by electric field |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1715181A (en) * | 2004-06-30 | 2006-01-04 | 北京大学 | Method for controlling carbon nano tube oriented arranging, distribution and density |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1715181A (en) * | 2004-06-30 | 2006-01-04 | 北京大学 | Method for controlling carbon nano tube oriented arranging, distribution and density |
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| CN 1715181 A,全文. |
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