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Film making method capable of precisely controlling film thickness and area of nanometer-thickness film

A nano-scale, film-forming technology, which is applied in the direction of nanotechnology, nanotechnology, and the preparation of test samples. It can solve the problem that the thickness of film materials is difficult to achieve uniformity, high dispersion requirements for film-forming substances, and low viscosity. problem, to achieve the effect of efficient and precise control of preparation

Pending Publication Date: 2019-09-24
深圳烯材科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this feeding method of directly pouring the film-forming liquid cannot accurately control and adjust the film-forming area, and it is also difficult to control the uniformity of the film-forming, so it is difficult to prepare a uniform nano-scale thin film material
Publication number is: CN109177010A Chinese invention patent application, on the basis of above-mentioned film-making method, change the feeding method of film-forming liquid into atomized spraying, by atomizing film-forming liquid into micron-sized droplets and making it Deposition on a rotating surface can effectively prepare a film material with a nanoscale thickness; however, due to the uneven velocity of the droplets in the atomization cone, the thickness of the obtained film material is still difficult to achieve uniformity in a large area; at the same time, due to the fog The film-forming liquid that can be used by this method needs extremely low viscosity, and the dispersibility of the film-forming substance in the solvent requires high; in addition, this method is not suitable for using flammable organic solvent solution to form a film. Otherwise, the atomized liquid droplets are prone to dangers such as deflagration

Method used

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  • Film making method capable of precisely controlling film thickness and area of nanometer-thickness film
  • Film making method capable of precisely controlling film thickness and area of nanometer-thickness film
  • Film making method capable of precisely controlling film thickness and area of nanometer-thickness film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Such as figure 2 As shown in a, the film-forming base material used in this example is a 125 μm thick PET film with a surface hydrophilic treatment, and an aluminum alloy cylinder with an inner diameter of 150 mm and a length of 100 mm is used as a rotating drum, and PET is bonded to the aluminum alloy drum with ethanol On the inner wall, the centrifugal acceleration applied on the surface of the PET substrate is 380g (g is the acceleration of gravity, and the value is 9.8m / s 2 ). The injection nozzle adopts a stainless steel needle, the inner diameter of the needle is 200 μm, and the length of the needle is 50 mm. The film-forming material is water-based polyurethane (WTPU), the solvent is water, and the concentration of the water-based polyurethane is 1 mg / ml. The needle is connected to the liquid pump with silicone tubing, and the needle is fixed on a bracket that can move automatically according to the program. The liquid pump sends the water-based polyurethane s...

Embodiment 2

[0058] Such as image 3 As shown in a, the film-forming base material used in this example is PET film with a thickness of 188 μm, and an aluminum alloy cylinder with a length of 150 mm and an inner diameter of 100 mm is used as a rotating drum. The PET substrate is directly attached to the inner wall of the aluminum alloy roller, and centrifugal acceleration is applied to the surface of the PET substrate. is 500g (g is the acceleration of gravity, the value is 9.8m / s 2 ), the injection nozzle adopts a stainless steel needle, the inner diameter of the needle is 300 μm, and the length of the needle is 50 mm. Silver nanowires are used as the film-forming raw material, the solvent is absolute ethanol, and the concentration of the silver nanowires is 2 mg / ml. The needle is fixed on a stand that can be programmed to move automatically. The liquid pump sends the silver nanowire dispersion liquid into the needle and injects it onto the surface of the rotating PET film. The liquid pu...

Embodiment 3

[0061] Such as Figure 4 As shown in a, the film-forming base material used in this example is a fluorinated release film, and an aluminum alloy cylinder with an inner diameter of 350 mm and a length of 250 mm is used as a rotating drum, and the fluorinated release film is bonded to the inner wall of the aluminum alloy drum with ethanol. The centrifugal acceleration applied on the surface of the fluorinated release film substrate is 400g (g is the acceleration of gravity, and the value is 9.8m / s 2). The injection nozzle is made of polytetrafluoroethylene needle, the inner diameter of the needle is 350 μm, and the length of the needle is 100 mm. The intrinsic graphene is used as the film-forming raw material, water is used as the solvent, and the intrinsic graphene concentration is 2.5 mg / ml. The needle is connected to the liquid pump with a polytetrafluoroethylene pipeline. The liquid pump sends the intrinsic graphene dispersion into the needle and injects it onto the surfac...

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Abstract

The invention relates to the field of preparation and application of a film material, in particular to a film making method capable of precisely controlling the film thickness and area of a nanometer-thickness film, thereby realizing high-efficiency control preparation of a nanometer-thickness film material with the uniform and consistent thickness. On the basis of the basic principle of a rotary centrifugal type film forming method, a printing spraying nozzle or pin head with a small aperture is used based on a base rotating device; under the conditions of the constant film forming liquid pressure and the controllable motion track, a certain amount of film forming liquid is sprayed on the surface of a film forming base at a certain rate in a micro liquid column manner, so that a uniform liquid film with the controllable thickness, shape, and area is formed; and thus a solid film material is obtained by controlling curing conditions. With the provided method, the high-efficiency and precise control preparation of the nanometer-thickness film material with the uniform thickness is realized. The film making method can be applied to technical fields of photoelectric devices, energy storage devices, protective functional coatings, catalytic materials, composite materials and the like widely.

Description

technical field [0001] The invention relates to the field of preparation and application of thin-film materials, in particular to a film-making method that can precisely control the thickness and area of ​​a nano-scale thin film. Background technique [0002] Flexible large-area uniform nano-film materials can be widely used in technical fields such as optoelectronic devices, energy storage devices, protective functional coatings, catalytic synthesis, composite materials, etc., and the efficient control of preparation of nano-scale thickness film materials with uniform thickness is the key to realizing the above-mentioned The key process basis of the application. At present, the commonly used nano-thickness thin film material preparation technologies in industry mainly include evaporation, magnetron sputtering, spray coating, spin coating, doctor blade coating, inkjet printing and so on. Among them, evaporation and magnetron sputtering can achieve material deposition with a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N23/2202G01N23/2251G01N21/84B82Y30/00
CPCB82Y30/00G01N1/28G01N21/8422G01N23/2202G01N23/2251
Inventor 裴嵩峰韦覃伟任文才成会明
Owner 深圳烯材科技有限公司
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