Stretchable flexible super-lyophobic film and its preparation method and droplet non-destructive transfer method

A super-lyophobic and thin-film technology, applied in coatings, nanotechnology, etc., can solve problems such as inconvenient system integration, and achieve the effect of broadening the application range and excellent wetting characteristics

Active Publication Date: 2018-02-06
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The implantation of the electrode array and the high driving voltage bring a lot of inconvenience to the system integration

Method used

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  • Stretchable flexible super-lyophobic film and its preparation method and droplet non-destructive transfer method
  • Stretchable flexible super-lyophobic film and its preparation method and droplet non-destructive transfer method
  • Stretchable flexible super-lyophobic film and its preparation method and droplet non-destructive transfer method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The present embodiment provides a kind of preparation method of stretchable flexible super-lyophobic film, it comprises the following steps:

[0041] (1) After cleaning and drying the original template with T-shaped micro-nano structure, place it on a hot stage, set the temperature of the hot stage to 150°C, place a clean glass slide next to the template, and preheat it for 3 minutes. Take out perfluorodecyltrichlorosilane (PFTS), drop two points on the glass slide on the hot stage with a disposable straw, buckle a glass vessel on the original template surface on the hot stage, and heat the hot stage for 4 minutes to obtain Best hydrophobic effect.

[0042] (2) Remove the inverted glassware, pour the pre-configured curable elastic material polydimethylsiloxane (PDMS) into the petri dish, put it into a vacuum drying oven at 80°C, vacuumize and dry Bake for 2 hours to cure the curable elastic material PDMS, and peel off the curable elastic material PDMS to obtain an inte...

Embodiment 2

[0047] This embodiment provides a method for non-destructive transfer of droplets, the process of which is as follows figure 2 As shown, the super-lyophobic surface prepared in Example 1 has the characteristics of good flexibility and good stretchability, and can perform droplet manipulation and non-destructive transfer. The method specifically includes the following steps:

[0048] First, the droplet 22 is placed on the superlyophobic film 23;

[0049] Secondly, the flexible transparent super-lyophobic film 21 prepared in operation example 1 grabs the droplets from the super-lyophobic film 23;

[0050] Finally, stretching the superlyophobic film 21 reduces the adhesion of the film to the droplet, allowing the droplet 22 to fall off the film for lossless transfer to any other surface.

Embodiment 3

[0052] This example provides another non-destructive droplet transfer method, which uses the characteristics of good flexibility and good stretchability of the super-lyophobic surface prepared in Example 1 to perform droplet manipulation and non-destructive transfer. The method specifically includes the following steps:

[0053] First, the droplet 22 is placed on the superlyophobic film 23;

[0054] Secondly, the flexible transparent super-lyophobic film 21 prepared in operation example 1 grabs the droplets from the super-lyophobic film 23;

[0055] Finally, by bending the super-lyophobic film 21 to change the local curvature of the contact between the film and the droplet, the adhesion force of the film to the droplet is reduced, so that the droplet 22 falls from the film and transfers to any other surface without damage.

[0056] image 3 It is a diagram of the control process for realizing the lossless transfer of droplets by actually manipulating droplets based on the st...

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Abstract

The invention provides a stretchable flexible super-lyophobic film, a preparation method and a droplet non-destructive transfer method. The preparation method comprises: performing fluorination modification on a template with an inverted micro-nano structure and pouring a curable elastic material; peeling the curable elastic material from the original template to obtain an intermediate having a micro-nano structure corresponding to the inverted micro-nano structure ; Spin-coat plastic emulsion on the intermediate; solidify the spin-coated plastic emulsion; peel off the cured film and perform fluorinated modification to obtain a stretchable flexible super-lyophobic film. The super-lyophobic film not only has good low-wetting characteristics for almost any liquid, but also has good flexibility and stretchability, and can change the local solid-liquid contact area and curvature by stretching and bending the surface. , to adjust the adhesion force of the surface to the droplet and realize the lossless transfer of the droplet. The present invention also provides methods for liquid droplet manipulation and lossless transfer via stretchable flexible superlyophobic surfaces.

Description

technical field [0001] The invention relates to a stretchable flexible super-lyophobic film, a preparation method and a non-destructive droplet transfer method, and belongs to the technical field of micro-droplet operation control. Background technique [0002] In recent years, planar microfluidic chips that manipulate liquid droplets on surfaces have attracted extensive attention. Compared with the traditional channel microfluidic chip, the planar microfluidic chip not only has the advantages of miniaturization, integration, low reagent consumption, and fast analysis speed of the channel microfluidic chip, but also has the advantages of many channel microfluidic chips. It has advantages such as easy direct contact with liquid droplets, convenient handling of solid samples and generation of liquid droplet arrays, and no need to worry about microchannel blockage caused by solid particles and air bubbles. [0003] However, compared with traditional channel microfluidic chips ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J7/04C09D123/08C09D123/12C08L83/04C08L23/16C08L9/02C08L9/00C08L11/00B82Y40/00
CPCC08J5/18C08J7/04C09D123/08C09D123/12C08L23/16C08L83/04
Inventor 王智伟吴天准王磊袁丽芳
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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