Acquired immunodeficiency syndrome diagnosis multichannel microfluidic chip apparatus containing hydrophobic substrate

Abstract

The invention relates to a multi-channel microfluidic chip device for AIDS diagnosis comprising a hydrophobic substrate, which belongs to the field of analysis and testing. There are technical obstacles in making the substrate of the microfluidic chip for AIDS diagnosis with cheap and easy-to-process polydimethylsiloxane (PDMS). The gist of this case is that the substrate is selected from PDMS with an original ecological surface, and the hinged fixture with a micro-ultrasonic transducer is manually fastened and positioned at the position adjacent to the sample liquid flow terminal of the microfluidic chip, so as to The ultrasonic wave induces the sample liquid flow to flow from the sample injection end of the chip along the pipe of the chip to the terminal. The pipe of the chip is filled with micron-sized silicon dioxide particle fillers. The function of the filler includes supporting the inner wall of the pipe, And, a collection of hydrophilic micro-channels is used to compensate the originally hydrophobic channels, and the inner wall of the channel is squeezed and covered to reduce the chance of biomacromolecules in contact with the inner wall.

Description

technical field [0001] The invention relates to a multi-channel microfluidic chip device for AIDS diagnosis comprising a hydrophobic substrate, which belongs to the field of analysis and testing. Background technique [0002] For the background of multi-channel microfluidic AIDS diagnosis technology, please refer to CN 200910151219.0 and other invention patent applications. [0003] As far as the overall overview of microfluidic technology itself is concerned, you can refer to the monograph "Illustrated Microfluidic Chip Laboratory" published by the famous microfluidic expert Mr. Lin Bingcheng not long ago, which has been published by Science Press. The past, present, and future prospects of microfluidic technology, etc., have detailed and long-form discussions that go deep into specific details. [0004] So, let's talk about the key issues of this case. [0005] The basic structure of a microfluidic chip includes a substrate etched with channels and a cover sheet attached...

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Problems solved by technology

[0007] But it's not that simple

[0008] First, this polydimethylsiloxane material, which is referred to by the acronym PDMS, is itself a strongly hydrophobic material, and channels are built on this material. modification operation, then, after the overall assembly is completed, that is, after the cover is covered, because the inner surface of the channel in the structure occupies most of the inner surface of the liquid flow channel, then the inner surface of the PDMS channel is The strong hydrophobicity is the decisive factor, it will make it very difficult for the polar liquid fine flow similar to the aqueous solution to pass through, and its flow resistance is so large that even the general micropump is difficult to push, of course, if the cover sheet is also If you choose to use the PDMS material, then the problems are basically the same, with minor differences; therefore, in the prior art, it is necessary to modify and modify the inner surface of the channel on the PDMS material; then, this is for the PDMS channel Is the modification operation of the inner surface of the channel very troublesome? That's not the problem. What constitutes a serious technical problem is an

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