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A controllable preparation method of photoresponsive surface wrinkle microstructure

A photoresponse, microstructure technology, applied in optomechanical equipment, photoengraving process of pattern surface, photosensitive material for optomechanical equipment, etc. Effect

Inactive Publication Date: 2020-05-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the intelligent regulation of wrinkle microstructure using light as an external stimulus.

Method used

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  • A controllable preparation method of photoresponsive surface wrinkle microstructure
  • A controllable preparation method of photoresponsive surface wrinkle microstructure
  • A controllable preparation method of photoresponsive surface wrinkle microstructure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A controllable preparation method of a photoresponsive surface wrinkle microstructure, comprising the following steps:

[0023] Step 1. Mix the PDMS prepolymer and crosslinking agent Sylgard184 (purchased from Dow Corning, USA) at a mass ratio of 10:1, and fully stir with a glass rod to form a uniform prepolymer; After degassing in a multi-purpose vacuum pump for 1 hour, pour it into a watch glass; heat at 70°C for 4 hours to cure; obtain a PDMS soft substrate;

[0024] Step 2, carry out oxygen plasma surface activation treatment to the PDMS soft substrate obtained in step 1, then spin-coat a chloroform solution of 1wt% polymethyl methacrylate (PMMA) (spin-coating parameters: 4000rpm, 60s), and degas in a vacuum pump Remove residual organic solvent to obtain PDMS / PMMA soft and hard composite system.

[0025] Step 3: Heat the PDMS / PMMA composite system obtained in Step 2 at 100°C for 1 hour, and cool to room temperature with the furnace to obtain a maze-like surface wri...

Embodiment 2

[0030] A controllable preparation method of a light-responsive surface wrinkle microstructure, the preparation process of which is basically the same as that of Example 1, the only difference being:

[0031] In step 2, the degradable polymer is changed from PMMA to poly-L-lactic acid (PLLA), and the spin coating speed is changed from 4000rpm to 5000rpm to obtain a PDMS / PLLA soft-hard composite system;

[0032] In step 3, the heating temperature was changed from 100°C to 90°C, and the wrinkled pattern on the surface of the PDMS / PLLA soft-hard composite system was as follows: Figure 4 As shown in the light microscope diagram;

[0033] In step 4, the stamped photomask is made of figure 2 The photomask 1 shown is changed as Figure 5 Photomask 2 shown, light dose from 0-13.2J cm -2 Change to 0-19.2J cm -2 , so as to control the amplitude of the wrinkle topography in the exposed area A (measured by atomic force microscope), as shown in Table 2; at the same time, the wrinkles ...

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Abstract

The invention discloses a controllable preparation method of a light responsive surface crepe micro-structure. The method comprises the following steps of selecting a polydimethylsiloxane (PDMS) elastomer as a substrate; performing oxygen plasma surface activation treatment on the PDMS elastomer, and spin-coating an organic solvent solution in which a degradable polymer with certain mass fraction is dissolved to form a soft and hard composite system; applying an external stress to the soft and hard composite system to form a crepe shape on the surface of the soft and hard composite system; and covering a photomask onto the existing surface crepe to perform selective UV-irradiation, using a polymer to photodegrade breakage of a polymer chain segment in reaction, causing disturbance of a stress field in a film / base composite system, on one hand, controlling vibration amplitude of exposed area crepe shape by controlling illumination dose, and on the other hand, controlling the orientation of a crepe pattern by covering the photomask onto a non-exposed area close to a boundary. The method is clean and efficient, and utilization of an expensive instrument and complex operation steps are avoided.

Description

technical field [0001] The invention relates to the preparation and research of intelligent surfaces, in particular to a controllable preparation method of light-responsive surface wrinkle microstructure. Background technique [0002] The research and development of new intelligent devices that can automatically respond to external environmental stimuli has become a major research hotspot in the field of material science today. Among them, preparing smart surfaces with specific physicochemical properties and responding to external stimuli is a great way to design responsive structures. A smart surface refers to a surface that reversibly changes or switches the physical and chemical states of surface materials under external stimuli (such as light, electricity, magnetism, heat, and various chemical parameters). The research on smart surfaces has extremely attractive application prospects in many scientific fields. [0003] Surface wrinkling, as a spontaneous process of form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12C08J7/04C08J7/00C09D133/12C09D167/04C09D175/04G03F7/004G03F7/039C08L83/04
CPCC08J7/0427C08J2383/04C08J2433/12C08J2467/04C08J2475/04C09D133/12C09D167/04C09D175/04G03F7/004G03F7/039
Inventor 鲁从华汪娟娟
Owner TIANJIN UNIV
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