Preparation device of functionalized carbon nanotube

Abstract

The utility model relates to the technical field of preparation of carbon nanotubes, and discloses a preparation device of a functionalized carbon nanotube, which comprises a gas mixer, an evaporator and a tubular furnace which are sequentially communicated through pipelines, the gas inlet end of the gas mixer is used for connecting a first carbon source, a second carbon source, inert gas and shielding gas, and the gas inlet end of the tubular furnace is used for connecting a second carbon source. The evaporator comprises a closed box body used for containing ammonia water, a heating sleeve and a pressure gauge are arranged on the outer wall of the box body, an atomizer is arranged in the box body, the evaporator further comprises an ammonia water supplementing device communicated with the interior of the box body, and a thermometer electrically connected with the heating sleeve. According to the utility model, each specific reaction parameter can be strictly controlled; meanwhile, the ammonia water in the box body can be supplemented in real time, and various gas raw materials passing through the gas mixer are conveyed at a constant speed, so that the fullness of each material can be ensured, and the preparation efficiency of the carbon nano tube can be effectively improved on the premise of ensuring the fullness of the materials and strictly controlling each reaction parameter.

Description

Technical Field

[0001] The utility model relates to the technical field of preparation of carbon nanotubes, in particular to a preparation device for functionalized carbon nanotubes. Background Art

[0002] In order to improve the performance of carbon nanotubes, some carbon nanotubes need to be functionalized to obtain functionalized carbon nanotubes. During the preparation process, various process parameters must be strictly controlled and sufficient materials must be ensured. However, the existing preparation devices cannot strictly control various process parameters and cannot replenish materials in time to ensure sufficient materials, resulting in low preparation efficiency. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a preparation device for functionalized carbon nanotubes, which can strictly control various reaction parameters, ensure the sufficiency of materials, and improve the preparation efficiency.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A preparation device for functionalized carbon nanotubes comprises a gas mixer, an evaporator and a tubular furnace which are sequentially connected through pipelines, wherein the gas inlet end of the gas mixer is used to connect a first carbon source, a second carbon source, an inert gas and a protective gas, the evaporator comprises a closed box for placing ammonia water, the outer wall of the box is provided with a heating jacket and a pressure gauge, the interior of the box is provided with an atomizer, and further comprises an ammonia water replenishing device which is connected to the interior of the box, and a thermometer which is electrically connected to the heating jacket.

[0006] Preferably, a temperature controller is included which is electrically connected to the heating jacket.

[0007] Preferably, a condenser reflux device is included, and the condenser reflux device is communicated with the interior of the housing.

[0008] Preferably, a regulator is included, and there are multiple atomizers, and the multiple atomizers are all electrically connected to the regulator.

[0009] Preferably, the ammonia water replenishing device comprises a liquid storage tank, the liquid storage tank is connected to the housing through a liquid replenishing pipe, and a flow meter and a control valve are sequentially provided on the liquid replenishing pipe along the flow direction of the ammonia water.

[0010] Preferably, the box body is connected to the tubular furnace through a material conveying pipe, and the outer wall of the material conveying pipe is sleeved with a heat-insulating sleeve.

[0011] Preferably, the protective gas is hydrogen, and the gas inlet end of the gas mixer is respectively connected with a first feeding pipe for conveying a first carbon source, a second feeding pipe for conveying a second carbon source, a third feeding pipe for conveying hydrogen, and a fourth feeding pipe for conveying an inert gas.

[0012] Compared with the prior art, a functionalized carbon nanotube preparation device according to an embodiment of the utility model has the following beneficial effects: by arranging a heating jacket on the outer wall of a box body, and arranging a thermometer electrically connected to the heating jacket, the temperature of the heating jacket can be controlled in real time by the thermometer to ensure that the temperature is within a normal range; by arranging a pressure gauge on the outer wall of the box body, the pressure inside the box body can be monitored in real time to ensure that the pressure is within a normal range, thereby strictly controlling various specific reaction parameters; at the same time, by arranging an ammonia water replenishing device connected to the inside of the box body, the ammonia water in the box body can be replenished in real time, and various gas raw materials are transported at a uniform speed through the gas mixer, thereby ensuring the sufficiency of various materials. On the premise of ensuring the sufficiency of materials and strictly controlling various reaction parameters, the preparation efficiency of carbon nanotubes can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a device for preparing functionalized carbon nanotubes of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the evaporator of the utility model.

[0015] Wherein: 1-gas mixer, 2-evaporator, 3-tube furnace, 4-box, 5-heating jacket, 6-pressure gauge, 7-atomizer, 8-thermometer, 9-temperature controller, 10-condenser reflux, 11-regulator, 12-liquid storage tank, 13-liquid replenishing pipe, 14-flow meter, 15-control valve, 16-feeding pipe, 17-insulation sleeve, 18-first feeding pipe, 19-second feeding pipe, 20-third feeding pipe, 21-fourth feeding pipe. DETAILED DESCRIPTION

[0016] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0017] It should be noted that in the description of this application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] like Figure 1-2 As shown, a functionalized carbon nanotube preparation device according to a preferred embodiment of the utility model comprises a gas mixer 1, an evaporator 2 and a tubular furnace 3 which are sequentially connected through pipelines, the gas inlet end of the gas mixer 2 is used to connect the first carbon source, the second carbon source, the inert gas and the protective gas, the evaporator 2 comprises a closed box 4 for placing ammonia water, the outer wall of the box 4 is provided with a heating jacket 5 and a pressure gauge 6, the interior of the box 4 is provided with an atomizer 7, and also comprises an ammonia water replenishing device connected to the interior of the box 4, and a thermometer 8 electrically connected to the heating jacket 5. The tubular furnace 3 is a prior art, and the raw materials react in the tubular furnace 3 to produce functionalized carbon nanotubes, and the specific structure is not repeated here.

[0020] The functionalized carbon nanotube preparation device based on the above technical features is provided with a heating jacket 5 on the outer wall of the box body 4, and a thermometer 8 is provided to be electrically connected to the heating jacket 5, so that the temperature of the heating jacket 5 can be controlled in real time by the thermometer 8 to ensure that the temperature is within a normal range; by providing a pressure gauge 6 on the outer wall of the box body 4, the pressure inside the box body 4 can be monitored in real time to ensure that the pressure is within a normal range, thereby strictly controlling various specific reaction parameters; at the same time, by providing an ammonia water replenishing device connected to the inside of the box body 4, the ammonia water in the box body 4 can be replenished in real time, and various gas raw materials are transported at a uniform speed through the gas mixer 1, thereby ensuring the sufficiency of various materials. On the premise of ensuring the sufficiency of materials and strictly controlling various reaction parameters, the preparation efficiency of carbon nanotubes can be effectively improved.

[0021] Specifically, the flow rate of the mixed gas after mixing in the gas mixer 1 is 0.5-5 L / min, and the ratio of each gas is not limited. The first carbon source and the second carbon source are both selected from alkanes and alkenes, but the first carbon source and the second carbon source are different. The temperature of the evaporator 2 is controlled to be 30-80°C and the pressure is 500-10000 Pa (slightly positive pressure).

[0022] In this embodiment, the thermometer 8 can monitor the temperature in real time, but it is inconvenient to control the temperature change. In order to facilitate the automatic control of temperature, a temperature controller 9 electrically connected to the heating jacket 5 can be provided. The temperature of the evaporator 2 is monitored in real time by the thermometer 8, and the temperature information is fed back to the temperature controller 9. The temperature controller 9 controls the opening and closing of the heating jacket 5 to achieve automatic temperature control. In addition, after the mixed gas enters the evaporator 2, it brings out the misty ammonia water into the tubular furnace 3. In order to avoid the heat loss and the temperature drop during the process of the gas flowing from the evaporator 2 into the tubular furnace 3, the box 4 is connected to the tubular furnace 3 through the feed pipe 16. The outer wall of the feed pipe 16 is sleeved with a heat preservation sleeve 17 for heat preservation, which fully guarantees the temperature of the raw materials entering the tubular furnace 3.

[0023] In this embodiment, the functionalized carbon nanotube preparation device also includes a condenser reflux device 10, which is connected to the interior of the housing 4, that is, the ammonia that does not flow into the tubular furnace 3 can be liquefied under the action of the condenser reflux device 10 and flow back into the housing 4 as an ammonia raw material.

[0024] In this embodiment, in order to ensure the atomization effect, the atomizer 7 can be set to multiple, but in actual use, the atomization rate needs to be selected according to the actual situation, so the multiple atomizers 7 do not always work at the same time. For the convenience of control, a regulator 11 can be set, and the multiple atomizers 7 are all electrically connected to the regulator 11. When working, the regulator 11 controls the operation of the atomizer 7 in real time according to the needs to ensure the atomization amount of ammonia water. The atomizer adopts an ultrasonic atomizer to ensure the atomization effect.

[0025] In this embodiment, the ammonia water replenishing device includes a liquid storage tank 12 for storing ammonia water, and the liquid storage tank 12 is connected to the box body 4 through a liquid replenishing pipe 13. A flow meter 14 and a control valve 15 are sequentially arranged on the liquid replenishing pipe 13 along the flow direction of the ammonia water. The compensation amount is generally 30-100 ml per minute, which can be monitored by the flow meter 14 and accurately controlled by the control valve 15.

[0026] In this embodiment, the protective gas is hydrogen, and each raw material enters the tubular furnace 3 for reaction. The reaction materials include catalyst + first carbon source + second carbon source + ammonia + Ar / N2 + H2, the reaction temperature is 600-1000 ° C, the pressure is 500-10000 Pa (slightly positive pressure), and the reaction time is 0.5-4 hours. Ammonia is added to obtain nitrided carbon nanotubes, hydrogen is used to prevent oxidation, and inert gas (Ar / N2) is used for protection. The reaction is completed and the tail gas is discharged and the material is collected. To facilitate the transportation of each gas, the air inlet end of the gas mixer 1 is respectively connected with a first feed pipe 18 for conveying the first carbon source, a second feed pipe 19 for conveying the second carbon source, a third feed pipe 20 for conveying hydrogen, and a fourth feed pipe 21 for conveying an inert gas.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A device for preparing functionalized carbon nanotubes, characterized in that: It comprises a gas mixer, an evaporator and a tubular furnace which are sequentially connected through pipelines. The air inlet end of the gas mixer is used to connect a first carbon source, a second carbon source, an inert gas and a protective gas. The evaporator comprises a closed box for placing ammonia water. The outer wall of the box is provided with a heating jacket and a pressure gauge. The interior of the box is provided with an atomizer. It also comprises an ammonia water replenishing device which is connected to the interior of the box, and a thermometer which is electrically connected to the heating jacket.

2. The device for preparing functionalized carbon nanotubes according to claim 1, characterized in that: A temperature controller is included that is electrically connected to the heating jacket.

3. The device for preparing functionalized carbon nanotubes according to claim 1, characterized in that: A condensation reflux device is included, and the condensation reflux device is communicated with the interior of the box.

4. The device for preparing functionalized carbon nanotubes according to claim 1, characterized in that: It comprises a regulator, and there are multiple atomizers, and the multiple atomizers are all electrically connected to the regulator.

5. The device for preparing functionalized carbon nanotubes according to claim 1, characterized in that: The ammonia water replenishing device comprises a liquid storage tank, which is connected to the box body through a liquid replenishing pipe, and a flow meter and a control valve are sequentially arranged on the liquid replenishing pipe along the flow direction of the ammonia water.

6. The device for preparing functionalized carbon nanotubes according to any one of claims 1 to 5, characterized in that: The box body is connected with the tubular furnace through a material conveying pipe, and the outer wall of the material conveying pipe is sleeved with a heat-insulating sleeve.

7. The device for preparing functionalized carbon nanotubes according to any one of claims 1 to 5, characterized in that: The protective gas is hydrogen, and the gas inlet end of the gas mixer is respectively connected with a first feeding pipe for conveying a first carbon source, a second feeding pipe for conveying a second carbon source, a third feeding pipe for conveying hydrogen, and a fourth feeding pipe for conveying an inert gas.

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