Preparation method of alignment carbon nano tube/polymer composite membrane
A technology of oriented carbon nanotubes and carbon nanotubes, which is applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, electrical components, etc., can solve problems such as limiting the conductivity of composite films, achieve excellent flexibility and deformation ability, and be easy to operate. good controllability
Inactive Publication Date: 2012-03-28
FUDAN UNIV
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Problems solved by technology
Since the longest CNTs in the CNT sheet that can be prepared at present is 1 mm, the charge in the film can only be conducted through the front and back adjacent CNTs, and its contact resistance greatly limits the improvement of the conductivity of the composite film.
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[0024] The specific process of preparation is as follows:
[0025] First, the synthesis of aligned carbon nanotube arrays.
[0026] The carbon nanotube arrays were prepared by chemical vapor deposition. First, a layer of Al is deposited on the silicon wafer by an electron beam evaporation coater. 2 o 3 and a layer of Fe, resulting in a structure of Si / SiO 2 / Al 2 o 3 (0.5~30 nm) / Fe(0.5~3 nm) catalyst. Then put the catalyst into the tube furnace, and pass in hydrogen and argon, then raise the temperature to 500~900°C and keep the temperature constant for 0.5~5 minutes. After the catalyst is matured, pass in the carbon source ethylene, where the flow rate of ethylene is 60 -290 sccm, Argon flow 400-620 sccm, Hydrogen flow 20-48 sccm. After continuing to keep the temperature for 5-100 minutes, it can grow on the silicon wafer with a height of 0.5-5 mm and a density of 10 10 ~10 11 cm -2 The carbon nanotube array in which the carbon nanotubes are highly oriented, has hi...
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Abstract
The invention belongs to the technical field of the preparation of a carbon nano tube thin film, in particular to a preparation method of an alignment carbon nano tube / polymer composite membrane. The preparation method comprises the steps of: preparing a carbon nano tube / polymer composite membrane with good alignment by a slicing method, wherein a carbon nano tube in the thin film is in parallel with the surface of the thin film and is evenly distributed, so that the surface of the thin film is excellent in conductivity performance, and the thickness and the density of the composite membrane can be controlled; and precisely controlling the thickness of the thin film within a wider range by a slicing machine, wherein the density of the carbon nano tube in the composite membrane can be realized by changing the synthesis condition of a carbon nano tube array or compressing the volume of the carbon nano tube array. The prepared composite membrane is higher in light transmittance, and good in flexibitity and deformability. The preparation method is simple to operate and good in controllability; and the prepared composite membrane can be taken as a good transparent and flexible electrode to replace the conventional conductive glass in a plurality of fields.
Description
technical field [0001] The invention belongs to the technical field of carbon nanotube film preparation, in particular to a preparation method of an aligned carbon nanotube / polymer composite film. Background technique [0002] Transparent and flexible conductive materials are widely used in the preparation of new devices such as foldable displays, flexible solar cells and thin film transistors 1-2 . The traditional preparation method is to make Sn-doped In 2 o 3 (ITO) deposited onto flexible substrates. Due to the limited resources of ITO, harsh preparation conditions, high rigidity, and acid resistance 3 , therefore, there is an urgent need to develop new alternative materials that can meet higher requirements. [0003] In recent years, research on carbon nanotube (CNT) / polymer composite films has attracted great attention 4-5 . This is because CNTs have superior mechanical and electrical properties; while polymers provide good flexibility and transparency. In order...
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IPC IPC(8): C08L63/00C08K7/00C08K3/04C08G59/42B26D3/28C01B31/02H01L51/46
CPCY02E10/549
Inventor 彭慧胜黄三庆仰志斌李立张玲莉
Owner FUDAN UNIV