Method for constructing multistage ordered microstructure by combination of template imprinting and surface wrinkling

A combined, microstructured technology, applied in the direction of chemical instruments and methods, lamination, lamination devices, etc., to achieve the effect of wide application prospects, low technical cost, and wide application range

Inactive Publication Date: 2015-04-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, great progress has been made in the preparation of functional material surfaces at the mi

Method used

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  • Method for constructing multistage ordered microstructure by combination of template imprinting and surface wrinkling
  • Method for constructing multistage ordered microstructure by combination of template imprinting and surface wrinkling
  • Method for constructing multistage ordered microstructure by combination of template imprinting and surface wrinkling

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for constructing a multi-level ordered microstructure by combining template imprinting and surface wrinkling, comprising the following steps:

[0023] (1) Fix the PDMS elastomer on the stretching table with a pre-stretch rate of 10% for preparing a wrinkle template; a stretch rate of 5% for transferring the PS film;

[0024] (2) The stretched PDMS used to prepare the wrinkle template is treated with oxygen plasma for 10 minutes, and the wrinkle template with a regular shape is obtained after retraction;

[0025] (3) In a water bath environment, transfer the spin-coated 2wt% PS film on the glass substrate to the stretched PDMS used to transfer the PS film in step (1) to form a PDMS / PS double-layer system, and dry it under vacuum ;

[0026] (4) Cover the wrinkle template prepared in step (2) on the PDMS / PS bilayer system that has been vacuum-dried in step (3) at an angle of 90 degrees to the PDMS stretching direction, and heat it at 90 degrees Celsius for 2 hour...

Embodiment 2

[0029] (1) Fix the PDMS elastomer on the stretching table, the pre-stretch rate is 5%, and it is used to prepare the wrinkle template; the stretch rate is 10%, and it is used to transfer the PS film;

[0030] (2) The stretched PDMS used to prepare the wrinkle template is treated with oxygen plasma for 10 minutes, and the wrinkle template with a regular shape is obtained after retraction;

[0031] (3) In a water bath environment, transfer the spin-coated 3wt% PS film on the glass substrate to the stretched PDMS used to transfer the PS film in step (1) to form a PDMS / PS double-layer system, and dry it under vacuum conditions ;

[0032] (4) Cover the wrinkle template prepared in step (2) on the PDMS / PS bilayer system that has been vacuum-dried in step (3) at an angle of 50 degrees to the PDMS stretching direction, and heat it at 105 degrees Celsius for 1 hour Cool to room temperature, remove the wrinkle template, and obtain the first-order morphology;

[0033] (5) The PDMS / PS / b...

Embodiment 3

[0035] (1) Fix the PDMS elastomer on the stretching table with a pre-stretch rate of 5%, which is used to prepare a wrinkle template; a stretch rate of 5%, which is used to transfer the PS film;

[0036] (2) The stretched PDMS used to prepare the wrinkle template was treated with oxygen plasma for 15 minutes, and a wrinkle template with a regular shape was obtained after retraction;

[0037] (3) In a water bath environment, transfer the spin-coated 2wt% PS film on the glass substrate to the stretched PDMS used to transfer the PS film in step (1) to form a PDMS / PS double-layer system, and dry it under vacuum ;

[0038] (4) Cover the wrinkle template prepared in step (2) on the PDMS / PS bilayer system that has been vacuum-dried in step (3) at an angle of 0 degrees to the PDMS stretching direction, and heat it at 120 degrees Celsius for 0.5 hours Cool to room temperature, remove the wrinkle template, and obtain the first-order morphology;

[0039] (5) The PDMS / PS / bilayer system ...

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Abstract

The invention provides a method for constructing a multistage ordered microstructure by combination of template imprinting and surface wrinkling, which comprises the following steps: carrying out spin coating on a clean glass substrate by using a polyethyleneimine water solution, drying, and continuing spin coating by using a polystyrene (PS) tetrahydrofuran solution; in a water bath environment, and transferring the PS film to a drawn polydimethylsiloxane (PDMS) substrate to form a PDMS/PS soft/hard composite system; covering a previously prepared wrinkle template on the sample, and forming a primary pattern on the PDMS/PS double-layer system in the cooling process; and retracting the prestressed PDMS to form a secondary wrinkle pattern on the PDMS/PS double-layer system. The intersection angle between the primary pattern obtained by template imprinting and the secondary pattern obtained by surface wrinkling is changed to control the anisotropy of the composite pattern. The method has the advantages of low cost, simple process and favorable repetitiveness, and implements the construction of the precise controllable multistage ordered microstructure on the PDMS substrate.

Description

technical field [0001] The present invention relates to the microstructure processing technology of the polymer film surface, especially the method for constructing the multi-level ordered microstructure by combining template embossing and surface wrinkling; Polystyrene) double-layer system preparation method of composite morphology. Background technique [0002] The naturally occurring micro-nano composite structures on the surface of animals and plants in nature have attracted widespread attention of scientists. By learning from nature, we understand the impact of advanced structures, that is, micro-nano composite structures, on the properties of materials, which prompts us to deepen our understanding of the surface processing of materials. In recent years, the controllable preparation of functional micro-nano composite structures has attracted extensive research in various fields. Generally speaking, there are two main techniques for preparing surface topography: "Top-d...

Claims

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Application Information

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IPC IPC(8): B32B37/02B32B38/18B32B27/08B32B27/28B32B27/30B32B33/00
CPCB32B27/08B32B27/28B32B27/30B32B37/02B32B37/06B32B37/08B32B38/1825
Inventor 鲁从华姬海鹏
Owner TIANJIN UNIV
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