Wax-based blade coating patterning method

Abstract

The invention discloses a wax-based blade coating patterning method which comprises the following steps: performing hydrophilic treatment on the surface of a plastic piece to serve as a substrate; designing a photonic crystal pattern or a pattern of a microfluidic channel, and printing the designed patterns on the substrate by using wax; performing blade coating on SiO2 photonic crystal colloid on the substrate printed with the photonic crystal pattern, so that the SiO2 photonic crystal colloid is poured into a hollow area without the wax; or performing blade coating on microcrystalline cellulose suspension subjected to acidolysis on the substrate printed with the microfluidic channel, so that the microcrystalline cellulose suspension subjected to acidolysis is poured into the hollow area without the wax; and volatilizing a solvent, and forming a SiO2 photonic crystal or a microfluidic chip. The used blade coating has the advantages that the operation is simple, and heating is not needed; the manufactured photonic crystal pattern has excellent optical properties with ordered structure and angle deflection and can be applied to manufacturing anti-counterfeiting patterns, and the manufactured microfluidic chip has the characteristics of high resolution ratio, high flow velocity, low sample consumption and the like and can be used for low-cost biochemical field detection.

Description

technical field [0001] The invention belongs to the field of micromachining, and specifically relates to a wax-based scraping patterning method, that is, scraping an aqueous solution suspension on a hydrophilic substrate covered with wax, so as to pattern the material on the hydrophilic surface. Using this method, patterned photonic crystals and cellulose were successfully prepared and applied to the fabrication of fast and high-precision paper microfluidic analysis chips. Background technique [0002] Surface patterning refers to a micromachining method that generates micron or nanoscale regular surface structures in at least one dimension, and is widely used in microreactors, microarray devices, and microfluidic chips. Surface patterning methods include photolithography, micromechanical methods based on scanning probes, microcontact printing, inkjet printing, etc. Wax-based patterning methods mainly include screen printing, wax spray printer direct printing, etc. [0003...

AI Technical Summary

Problems solved by technology

[0004]The traditional wax printing micromachining method still has low resolution, needs heating, and consumes a lot of samples. complex

Inkjet printing requires expensive or custom instrumentation and operator requirements

In addition to the complicated operation and low resolution, there is still a problem with the current microfluidic chips on paper that the flow rate is too slow. Traditional paper chips need 15-20 minutes to flow through a 5 cm long paper channel.

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