A preparation method of flexible film based on graphene micro-cylindrical array

Abstract

The invention discloses a preparation method of a flexible thin film based on a graphene micro column array and belongs to the field of micro-nano machining. The preparation method comprises the following steps: washing a micro array silicon template and then pouring PDMS (Polydimethylsiloxane) after the micro array silicon template is subjected to hydrophobic treatment; curing and stripping to obtain PDMS with a micro array structure, carrying out plasma oxygen etching and soaking with a diallyldimethylammonium chloride solution, dispensing a graphene aqueous solution, drying, and then enabling the graphene to be uniformly spread on the surface and the side face of the micro column array; and finally, obtaining the flexible micro column array thin film. The preparation method has the advantages of simplicity and feasibility, controllable process parameters, low cost and high repeatability.

Description

technical field [0001] The invention belongs to the field of graphene film preparation, and in particular relates to a method of using drop-coated graphene onto the surface and side of a micro-column with a high aspect ratio, and uniformly spreading it on the surface of the micro-column, and a method for finally making a flexible micro-nano structure film. It belongs to the technical field of advanced graphene-based micro-nano processing film. Background technique [0002] Looking at the research results at home and abroad, although the thin film preparation technology has developed rapidly in research, the flexible electronic skin that has been developed rapidly in recent years requires the preparation of thin films to be both flexible and high-performance. Therefore, the preparation of flexible thin films is the most prominent problem to be solved urgently. problem. At present, researchers at home and abroad are actively designing high-performance, high-flexibility, and h...

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Problems solved by technology

The advantages of metal materials are high precision and wide measurement range, but the disadvantages are nonlinearity, poor anti-interference ability, and easy to be affected by external conditions; the advantages of organic materials are good ductility and fast response speed, and the disadvantage is that the conductivity depends on temperature , electric field, and low sensitivity; the advantages of semiconductor materials are high sensitivity, fast response, small size, and light weight, and the disadvantages are poor stability and poor conductivity

In recent years, graphene-based force-sensitive materials have shown extremely high force sensitivity, but it is still difficult for such materials to achieve satisfactory dynamic pressure repeatability, small hysteresis and excellent durability.

From a mechanical point of view, flexible electronic skins sometimes require large deformations and sometimes small deformations when working. Although graphene materials that have emerged in recent years have good elastic compression properties, they are not sensitive to pressure responses and must pass structural Design can be applied to electronic skin film

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