Preparation method of microstructure with constant aspect ratio and PDMS elastomer

Abstract

The invention provides a preparation method of a microstructure with a constant aspect ratio, which comprises the following steps: preparing a substrate with a microstructure pattern on the surface through selective exposure by using a photoetching method, filling sacrificial layer liquid into the microstructure pattern, pouring PDMS, and curing to obtain the microstructure with the constant aspect ratio. Meanwhile, the invention also provides the PDMS elastomer with the microstructure prepared by the method. According to the preparation method, the microstructure with the constant aspect ratio can be prepared on PDMS, the preparation method can be completed only through preparation of microstructure patterns on the surface of the substrate, filling of sacrificial layer liquid and PDMS tiling and curing, the overall process is simple, operation is easy and convenient, and application and popularization are facilitated.

Description

technical field [0001] The invention relates to the technical field of microstructure preparation, in particular to a preparation method of a microstructure with constant aspect ratio. Meanwhile, the present invention also relates to a PDMS elastomer having the microstructure prepared by the above method. Background technique [0002] Microstructure is a structural form with a scale generally on the order of microns, which has a wide range of applications in microfluidics and biomedical microfluidics. At present, the methods used to prepare microstructures mainly include rigid plastic and metal injection mold processing technology, dry film photolithography processing technology, photolithography processing polydimethylsiloxane (PDMS) technology, and molding layered processing technology. , hot pressing forming process, and stretching capillary glass tube process, etching process of inorganic materials and other methods. [0003] Although the existing methods for preparing...

AI Technical Summary

Problems solved by technology

[0003] Although the existing methods for preparing microstructures can realize the preparation of microstructures, they also have complex preparation processes, long time-consuming microstructure processing, high preparation costs for small-batch test products, difficulty in processing arc-shaped microstructures, and continuous changes. It is difficult to prepare a microchannel structure with a constant aspect ratio and many other shortcomings

Among them, taking the traditional microchannel structure used in microfluidic chips as an example, its cross-section is usually rectangular, which has certain shortcomings when performing more complex microfluidic environment simulations.

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