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Preparation method of reprogrammable driving micro-column array

A micro-pillar array and reprogramming technology, applied in the field of composite materials, can solve the problems of inability to meet bending response requirements, unfavorable practical applications, and low reusability

Active Publication Date: 2021-02-02
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the magnetic microcolumn array prepared in the above method, the internal magnetic particles have been fixed during the preparation process, so driven by the external magnetic field, it can only produce a specific response designed before the preparation, and cannot meet the requirements except In addition to the bending response requirements, the reusability is low, and the cost of use is high, which is not conducive to practical application

Method used

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  • Preparation method of reprogrammable driving micro-column array
  • Preparation method of reprogrammable driving micro-column array
  • Preparation method of reprogrammable driving micro-column array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Drop the PUA resin mixed with the photoinitiator-4-hydroxybenzophenone (HBP) onto the silicon template with a regular micron-sized column cavity (column cavity diameter 5 μm, depth 40 μm, spacing 20 μm), through a vacuum The assisted molding process penetrated into the column cavity of the template to form product I, and the cross-sectional image of the silicon template is shown in the attached figure 2 ;

[0040] Step 2: Punch a silicon die with regular micron-sized microcolumns (microcolumn diameter 3 μm, height 39 μm, microcolumn spacing 22 μm, one-to-one correspondence between microcolumn and column cavity) onto the template, discharge part of the resin in the column cavity, and the column The remaining resin in the cavity wraps the micropillars on the die to form Product II. For a cross-sectional image of the silicon die, see attached image 3 ;

[0041] Step 3: irradiate the product II with ultraviolet light, and the resin covering the micropillars on t...

Embodiment 2

[0049] The steps of embodiment 2 are the same as those of embodiment 1, except that the mass fraction of magnetic nanoparticles in the composite resin in step 5 is 10-30%.

Embodiment 3

[0051] Embodiment 3 is identical with embodiment 1 step, and difference is: in step 5, magnetic particle is Fe, Fe 2 o 3 , Fe 3 o 4 , one or more of Co and Ni.

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Abstract

The invention discloses a preparation method of a reprogrammable driving micro-column array. The preparation method comprises the steps of dripping light-cured high-elasticity resin onto a template with a regular micron-sized column cavity array to enable the resin to permeate into a column cavity of the template; punching a punching die with the regular micron-sized micro-column array onto the template; enabling the light-cured resin between the template and the stamping die to react and be cured through illumination, and curing the residual resin between the column cavity and the micro-column into a round sheath shape; removing the punching die from the template to obtain a resin shell with a regular micron-sized round sheath-shaped cavity array; dripping the composite resin mixed with the magnetic nanoparticles onto the resin shell so as to enable the composite resin to permeate into the cavity array of the resin shell; and covering the resin shell with a PET substrate, combining the substrate with the resin shell, and stripping from the template to obtain the liquid core / solid shell magnetic micro-column array.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of a reprogrammable driving microcolumn array. Background technique [0002] Stimuli-responsive micro-nanostructures can undergo mechanical deformation or motion under the action of external drives (such as light, heat, electricity, magnetic field, etc.), and have a wide range of potential applications. Among the different driving methods for triggering mechanical deformation / motion, magnetic field driving is widely used due to its advantages of instantaneous response, simple and non-destructive control, and low cost. For magnetically responsive micro-nanostructures, elongated micropillars capable of reversible bending / tilting in a controllable and on-demand manner are suitable for surface engineering applications (such as one-way adhesion, droplet transport, coloring, etc.), and have been widely studied. Research. [0003] At presen...

Claims

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Application Information

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IPC IPC(8): C08L75/14C08K3/08C08K3/22C08K3/36C08K3/34C08K3/38C40B50/00
CPCC08K3/08C08K3/22C08K3/34C08K3/36C08K3/38C08K2201/01C40B50/00C08L75/14
Inventor 王正直倪克颜朔庚郭志伟唐旭海薛龙建
Owner WUHAN UNIV
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