CN113798712A - Nano material connection method and super strong nano tube structure - Google Patents

Nano material connection method and super strong nano tube structure Download PDF

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CN113798712A
CN113798712A CN202111037540.3A CN202111037540A CN113798712A CN 113798712 A CN113798712 A CN 113798712A CN 202111037540 A CN202111037540 A CN 202111037540A CN 113798712 A CN113798712 A CN 113798712A
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synthesis
tube bundle
synthetic
nanomaterial
nano
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CN113798712B (en
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魏飞
白云祥
岳鸿杰
江雅馨
孙斯磊
高俊
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Tsinghua University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures

Abstract

The invention provides a nano material connection method and a super-strong nano tube structure, wherein the connection method comprises the following steps: synthesizing two parts of nano materials to be connected to form a locally superposed synthesis tube bundle or synthesis point; depositing a connecting material at the superposed position of the synthesis tube bundle, and completing the connection of the two parts of the nano materials through the connecting material; wherein, the superposition position comprises a linear superposition synthesis tube bundle and a punctiform superposition synthesis point. The invention can realize rapid and high-quality nano material connection, and the connection strength can meet the requirement of intrinsic strength of products.

Description

Nano material connection method and super strong nano tube structure
Technical Field
The invention relates to the technical field of nano materials, in particular to a nano material connection method and a super-strong nano tube structure.
Background
At present, the length is one of the most important factors influencing the mechanical properties of the carbon nanotube fiber, and based on the existing theoretical calculation, the smaller the length-diameter ratio of the carbon nanotube unit, the lower the tensile strength of the carbon nanotube bundle. The discontinuous length makes the carbon nanotube units easily slide to each other and cannot utilize the intrinsic high-strength covalent bond of the carbon nanotubes, and if the carbon nanotubes with any length can be obtained, the carbon nanotube can play an immeasurable role in the application. However, the control of the length of carbon nanotubes during growth is becoming increasingly difficult and difficult to break through.
For this reason, various welding methods of carbon nanotubes have been proposed in the prior art, such as electron beam irradiation, ion beam irradiation, joule heating, chemical modification, and the like. However, the existing welding methods are basically completed under an electron microscope, the welding operation is complex, the carbon nanotubes are damaged by the radiation method, the size capable of being welded is easily limited, on one hand, additional defects are introduced by the chemical modification method, and on the other hand, the strength of the molecular chain at the welding position is far less than that of the carbon nanotubes, so that the requirement of maintaining the intrinsic strength of the carbon nanotubes is difficult to meet.
Therefore, it is very important to develop a simple method capable of realizing the "welding" of the large-size carbon nanotube and maintaining the intrinsic high strength.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for connecting nanomaterials and a super-strong nanotube structure, so as to solve the problems of complicated operation, limited size, low connection strength, easy damage to nanomaterials, and the like in the existing nanomaterial connection process.
The invention provides a nano material connection method, which comprises the following steps: synthesizing two parts of nano materials to be connected to form a locally superposed synthesis tube bundle or synthesis point; depositing a connecting material at the superposed position of the synthesis tube bundle or the synthesis point, and completing the connection of the two parts of the nano materials through the connecting material; wherein, the superposition position comprises a linear superposition synthesis tube bundle and a punctiform superposition synthesis point.
In addition, an optional technical solution is that the process of synthesizing the two parts of nanomaterials to be connected to form the locally overlapped synthesis tube bundle or synthesis point includes: synthesizing two parts of nano materials to be connected into a synthetic tube bundle with a double-Y-shaped structure or a cross-shaped synthetic point; depositing a visual material on the synthesis tube bundle or the synthesis point; when the superposition position is a synthesis tube bundle, cutting off two branches of the synthesis tube bundle deposited with the visual material through a probe to form a regular synthesis tube bundle; performing synchronous relaxation treatment on the regular synthetic tube bundle or the synthetic point based on the probe or the sound wave vibration; and removing the visual materials on the regular synthetic tube bundle or the synthetic point after the synchronous relaxation treatment to form the synthetic tube bundle or the synthetic point.
In addition, the visualization material comprises sulfur nanoparticles or polycyclic aromatic hydrocarbon deposited on the synthesis tube bundle or the synthesis point; when the superposition position is the synthesis tube bundle, the visual material is regularly arranged on the two nano materials of the synthesis tube bundle and the superposition position of the two nano materials.
In addition, an optional technical solution is that the process of synchronizing the visual materials on the regular composite tube bundle or the composite point after relaxation processing includes: and heating the regular synthesis tube bundle or the synthesis points until the visual material is completely removed.
In addition, an optional technical solution is to synthesize two partially connected nanomaterials, including: placing a drainage member, a growth substrate and a nanomaterial in a reactor; introducing reducing gas and mixed gas into the reactor in sequence, and carrying out heating reaction; and introducing reducing gas into the reactor for cooling.
In addition, an optional technical scheme is that the nano material to be connected comprises a carbon nano tube, a carbon nano tube bundle, a silicon nano wire, a carbon nano wire, a metal nano wire and a carbon nano tube network formed by connecting the carbon nano tubes.
In addition, an optional technical solution is that the binder comprises titanium dioxide, tin dioxide, sulfur nanoparticles or polycyclic aromatic hydrocarbons.
In addition, the polycyclic aromatic hydrocarbon may include anthracene, naphthalene, phenanthrene, or pyrene.
In addition, an optional technical scheme is that when the overlapping position is the synthesis tube bundle, the overlapping length of the synthesis tube bundle, the average diameter of the connecting materials and the distance between two adjacent connecting materials meet the following conditions:
Figure BDA0003247819520000021
wherein l represents the overlapping length of the bundle of synthetic tubes, d represents the average diameter of the binder, w represents the distance between two adjacent binders, dtRepresents the critical total binder length.
According to another aspect of the present invention, a super-strong nanotube structure is provided, which is manufactured by using the above-mentioned nanomaterial connection method.
By utilizing the nanomaterial connection method and the superstrong nanotube structure, two nanomaterials to be connected are synthesized to form a synthesis tube bundle which is partially overlapped, then a connecting material is deposited at the overlapped position of the synthesis tube bundle, the connection of the two nanomaterials is completed through the connecting material, the connection of the nanomaterials with high quality can be rapidly realized, and the connection strength can meet the requirement of intrinsic strength.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a flow chart of a nanomaterial attachment method according to an embodiment of the present invention;
FIG. 2 is a detailed flow chart of a nanomaterial attachment method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a nanomaterial connection method according to an embodiment of the present invention.
Wherein the reference numerals include: sulfur nanoparticles 1, titanium dioxide particles 2, first nanomaterials 3, second nanomaterials 4.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
In order to describe the nanomaterial connection method and the super-strong nanotube bundle of the present invention in detail, embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 and 2 respectively show a flow of a nanomaterial connection method according to an embodiment of the present invention.
As shown in fig. 1 and fig. 2, the method for connecting nano materials according to the embodiment of the present invention mainly includes the following steps:
s110: synthesizing the two parts of nano materials to be connected to form a locally superposed synthesis tube bundle or synthesis point.
Wherein, the process of synthesizing two nano materials to be connected to form a locally coincident synthesis tube bundle or synthesis point may further include:
s111: synthesizing two parts of nano materials to be connected into a synthetic tube bundle with a double-Y-shaped structure or a cross-shaped synthetic point;
s112: depositing a visual material on the synthesis tube bundle or the synthesis point;
s113: when the superposition position is a synthesis tube bundle, cutting off two branches of the synthesis tube bundle deposited with the visual material through a probe to form a regular synthesis tube bundle;
s114: performing synchronous relaxation treatment on the regular synthetic tube bundle or the synthetic point based on the probe or the sound wave vibration;
s114: and removing the visual materials on the regular synthetic tube bundle or the synthetic point after the synchronous relaxation treatment to form the synthetic tube bundle or the synthetic point.
Wherein, the mode of probe or sound wave vibration is selected to synchronously relax the regular synthetic tube bundle or synthetic point, so that the displacement difference of two separated Raman G peaks is less than 8.8cm-1To improve the overall strength of the composite bundle or composite point.
In particular, when two parts of nano materials to be connected are synthesized and the superposed position is a synthesis tube bundle, the two ends (head part or tail part) of the two parts of nano materials can be controlled to be partially overlapped, the overlapped parts are subjected to primary welding through growth, in the process, if the size of the nanometer material to be connected is larger, the nanometer material and the nanometer material can be directly fixed together by a probe, if the size is small and the operation is inconvenient, the two parts of the nanometer materials can be synthesized into a synthesis tube bundle with a double Y-shaped structure, visualization material is then deposited on the tube bundle to facilitate optical visualization and manipulation thereof, and then removing the two branches of the synthetic tube bundle deposited with the visual material by using a probe shear to form a strip-shaped regular synthetic tube bundle, and finally removing the visual material on the regular synthetic tube bundle to form the synthetic tube bundle which is preliminarily welded together.
In addition, when the overlapping position of the two parts of nano materials is a synthesis point, the two parts of nano materials can be understood as a nanotube network, the two networks may have cross contact of the nanotubes and the nanotube support in the connection process, and the overlapping position is an overlapping point.
In one embodiment of the present invention, the visualization material may include sulfur nanoparticles or polycyclic aromatic hydrocarbons deposited on the synthesis tube bundle or the synthesis point, the polycyclic aromatic hydrocarbons may include anthracene, naphthalene, phenanthrene, or pyrene, and the visualization material is regularly disposed at the two nanomaterials of the synthesis tube bundle and the overlapping portion of the two nanomaterials, or is directly disposed at the overlapping portion of the synthesis point, and in the case that the nanomaterials are small in size, the visualization material may assist in visualization of the nanomaterials and facilitate manipulation.
When getting rid of visual material, accessible simple heat treatment, get rid of sulphur nanoparticle or polycyclic aromatic hydrocarbon completely, can know, visual material also can select for use other materials that can realize that the nanometer material is visual, get rid of the in-process, can carry out corresponding operation according to visual material's characteristic, handle.
In another embodiment of the present invention, the process of synthesizing the two parts of the nanomaterial to be connected may include: placing the drainage piece and the growth substrate in a reactor; introducing reducing gas and mixed gas into the reactor in sequence, and carrying out heating reaction; and finally, introducing reducing gas into the reactor for cooling.
S120: depositing a connecting material at the superposed position of the synthesis tube bundle or the synthesis point, and completing the connection of the two parts of the nano materials through the connecting material.
After the processing of step S110, the two portions of nano materials may form a pre "welding" structure composed of two partially overlapped single nano materials, and then a connecting material may be rapidly deposited at the overlapping position or the overlapping position of the structure, and a final "welding" process may be completed through the connecting material.
The connecting material can be made of titanium dioxide, tin dioxide, sulfur nanoparticles or polycyclic aromatic hydrocarbon and the like, and can be quickly deposited to a specified position through a fast chemical vapor deposition self-assembly (FCVDS) welding technology, wherein the specified position is mainly an overlapping or coincident position (synthesis tube bundle or synthesis point) of two parts of nano materials, and the position without connection does not need to deposit a corresponding connecting material, so that the nano materials are effectively connected.
It should be noted that the nanomaterial in the nanomaterial connection method of the present invention, that is, the nanomaterial to be connected may include a plurality of materials such as a carbon nanotube, a carbon nanotube bundle, a silicon nanowire, a carbon nanowire, a metal nanowire, a carbon nanotube network formed by connecting carbon nanotubes, and the like, and when different nanomaterials are connected, different binders, visual materials, and the like may be flexibly selected.
In addition, when the overlapping position is the bundle of synthesis tubes, the overlapping length of the bundle of synthesis tubes, the average diameter of the binder, the density of the arrangement, etc. can be adjusted according to the characteristics or requirements of the nanomaterial, for example, the overlapping length of the bundle of synthesis tubes, the average diameter of the binder, and the distance between two adjacent binders satisfy the following conditions:
Figure BDA0003247819520000061
wherein l represents the overlapping length of the bundle of synthetic tubes, d represents the average diameter of the binder, w represents the distance between two adjacent binders, dtThe critical total binder length is represented, namely the minimum critical value of the total binder length, and under the condition that the above conditions are met, parameter information such as the diameter, the distance and the like of the binder can be flexibly set.
As a specific example, fig. 3 illustrates a schematic principle of a nanomaterial connection method according to an embodiment of the present invention.
As shown in fig. 3, in the nanomaterial connection method of the embodiment of the present invention, when the overlapping position is a synthesis tube bundle as an example, first the first nanomaterial 3 and the second nanomaterial 4 to be connected are synthesized into a synthesis tube bundle with a double Y-shaped structure, then depositing sulfur nanoparticles 1 on the synthesis tube bundle, realizing the visualization of the first nanomaterial 3 and the second nanomaterial 4 through the sulfur nanoparticles 1, then removing two branches of the synthetic tube bundle deposited with the visual material by using a probe shear to form a strip-shaped regular synthetic tube bundle, carrying out synchronous relaxation treatment on the regular synthetic tube bundle based on the probe or sound wave vibration so as to remove the visual material on the regular synthetic tube bundle after the synchronous relaxation treatment, thus forming a synthesis tube bundle which is initially welded together, then depositing titanium dioxide particles 2 on the overlapped part of the synthesis tube bundle, the joining of the first nanomaterial 3 and the second nanomaterial 4 is accomplished by the titanium dioxide particles 2.
Correspondingly, when the position of coincidence of the two portions of nanomaterial is the point of synthesis, the difference is the step of removing the two branches of the bundle of synthesis tubes deposited with the visualization material without using probe scissors, similar to the above-described method steps.
Corresponding to the nano material connection method, the invention also provides a super-strong nano tube structure which is manufactured by the nano material connection method, can obtain a nano tube structure with any length, improves the tensile strength of the nano tube structure and further realizes the super-strong nano tube structure.
The above embodiments of the super-strong nanotube structure can refer to the description of the embodiments of the nanomaterial connection method, and are not repeated here.
According to the above examples, the nanomaterial connection method and the super-strong nanotube structure provided by the invention can locally synthesize two parts of nanomaterials to be connected to form locally overlapped synthesis tube bundles or synthesis points, then the connecting material is deposited at the overlapped positions of the synthesis tube bundles or the synthesis points, the connection of the two nanomaterials is completed through the connecting material, the high-quality nanomaterial connection can be rapidly realized, the connection mode is simple, the welding of large-size nanomaterials can be completed, the super-strong nanotube structure is further realized, and the connection strength can meet the requirement of intrinsic strength
The nanomaterial connection method and the super-strong nanotube structure according to the present invention are described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the nanomaterial connection method and the super nanotube structure provided by the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.

Claims (10)

1. A method of nanomaterial attachment comprising:
synthesizing two parts of nano materials to be connected to form a locally superposed synthesis tube bundle or synthesis point;
depositing a connecting material at the superposed position of the synthesis tube bundle or the synthesis point, and completing the connection of the two parts of nano materials through the connecting material; wherein the overlapping position comprises a linear overlapping composite tube bundle and a punctiform overlapping composite point.
2. The method for joining nanomaterials of claim 1, wherein the step of synthesizing the nanomaterials in two portions to be joined to form locally overlapping bundles or spots comprises:
synthesizing the two parts of nano materials to be connected into a synthetic tube bundle with a double-Y-shaped structure or a cross-shaped synthetic point;
depositing a visualization material on the bundle of synthesis tubes or the synthesis points; when the superposition position is a synthetic tube bundle, cutting off two branches of the synthetic tube bundle deposited with the visual material through a probe to form a regular synthetic tube bundle;
performing synchronous relaxation treatment on the regular synthesis tube bundle or the synthesis point based on a probe or sound wave vibration;
and removing the visual material on the regular synthetic tube bundle or the synthetic point after the synchronous relaxation treatment to form the synthetic tube bundle or the synthetic point.
3. The method for nanomaterial attachment according to claim 2,
the visualization material comprises sulfur nanoparticles or polycyclic aromatic hydrocarbons deposited on the bundles of synthesis tubes or the synthesis spots;
when the superposition position is a synthesis tube bundle, the visualization material is regularly arranged on the two nano materials of the synthesis tube bundle and the superposition position of the two nano materials.
4. The nanomaterial connection method of claim 2, wherein the process of removing the visualized material on the bundle of regular synthetic tubes or the synthetic points after the simultaneous relaxation process comprises:
and heating the regular synthesis tube bundle or the synthesis points until the visual material is completely removed.
5. The nanomaterial connection method according to claim 1 or 2, characterized in that the synthesis of the two portions of nanomaterial to be connected comprises:
placing a drainage piece and the growth substrate in a reactor;
introducing a reducing gas and a mixed gas into the reactor in sequence, and carrying out heating reaction;
and introducing reducing gas for cooling.
6. The method for nanomaterial attachment according to claim 1,
the nano material to be connected comprises carbon nano tubes, carbon nano tube bundles, silicon nanowires, carbon nanowires, metal nanowires and a carbon nano tube network formed by connecting the carbon nano tubes.
7. The method for nanomaterial attachment according to claim 1,
the connecting material comprises titanium dioxide, tin dioxide, sulfur nanoparticles or polycyclic aromatic hydrocarbon.
8. The method for nanomaterial attachment according to claim 7,
the polycyclic aromatic hydrocarbon comprises anthracene, naphthalene, phenanthrene or pyrene.
9. The method for nanomaterial attachment according to claim 1,
when the overlapping position is a synthesis tube bundle, the overlapping length of the synthesis tube bundle, the average diameter of the connecting materials and the distance between two adjacent connecting materials meet the following conditions:
Figure FDA0003247819510000021
wherein l represents the overlapping length of the bundle of synthetic tubes, d represents the average diameter of the binder, w represents the distance between two adjacent binders, dtRepresents the critical total binder length.
10. A super-strong nanotube structure fabricated by the method of joining the nanomaterials as defined in any one of claims 1 to 9.
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