PDMS elastomer micro-nano-processing method based on cross-linking control transfer printing

A technology of micro-nano processing and controlled transfer, which is applied in the process of producing decorative surface effects, manufacturing microstructure devices, microstructure technology, etc., can solve the problem of limited processing forms, difficulty in preparing complex fine surface pattern structures, Problems such as limited processing technology, to achieve the effect of a wide range of applications

Inactive Publication Date: 2018-12-18
吴浪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current micro-nano processing technology of PDMS elastomers is very limited, and it is limited by the processing form, and it is difficult to prepare complex and fine surface pattern structures.

Method used

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  • PDMS elastomer micro-nano-processing method based on cross-linking control transfer printing
  • PDMS elastomer micro-nano-processing method based on cross-linking control transfer printing
  • PDMS elastomer micro-nano-processing method based on cross-linking control transfer printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: prepare the PDMS membrane of surface patterning, the steps are as follows:

[0017] Step 1, using replica molding method to prepare PDMS with surface microstructure as a stamp for transfer printing: first, mix PDMS prepolymer and crosslinking agent Sylgard184 (purchased from Dow Corning, USA) in a mass ratio of 10:1, Stir well with a glass rod to form a uniform pre-polymer; after degassing the above-mentioned pre-polymer in a circulating water multi-purpose vacuum pump for 1 hour, pour it on a silicon formwork (ie, a master formwork) with a cylindrical array, and the pouring thickness is about 1mm; heat at 70°C for 4h to cure; carefully peel off the PDMS film on the silicon template is the PDMS stamp, the surface structure of the PDMS (10:1) stamp with the surface microstructure prepared by the replication molding method Such as figure 1 shown.

[0018] Step 2, utilizing the pouring method to prepare a PDMS thick film with a thickness of about 1mm as the...

Embodiment 2

[0021] Embodiment 2: prepare the PDMS membrane of surface patterning, preparation process is basically the same as embodiment 1, the only difference is that the mass ratio of PDMS prepolymer and cross-linking agent in step 1 is changed to 20:1, and the mass ratio in step 2 is changed to 20:1. The mass ratio of PDMS prepolymer and cross-linking agent is changed to 10:1, that is, the cross-linking parameter is changed from PDMS(10:1) / PDMS(20:1) to PDMS(20:1) / PDMS(10:1) , the finally obtained PDMS membrane with a regular dot raised pattern on the surface is as follows image 3 The atomic force diagram of .

[0022] As above, by changing the crosslinking agent content in the preparation process, that is, the crosslinking parameters, such as: PDMS (10:1) / PDMS (20:1), PDMS (10:1) / PDMS (30:1), PDMS ( 20:1) / PDMS(5:1), PDMS(20:1) / PDMS(10:1).

[0023] In summary, the method of the present invention mainly utilizes the difference in crosslinking agent content in the PDMS preparation pr...

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PUM

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Abstract

The invention discloses a PDMS elastomer micro-nano-processing method based on cross-linking control transfer printing. According to the PDMS elastomer micro-nano-processing method, a PDMS film as thesubstrate of transfer printing is prepared by using a casting method; a PDMS film with a surface microstructure is prepared as the stamp of the transfer printing by using a replica molding method; during the preparation of the substrate and the stamp, the cohesive energy (soft/hard) difference between the PDMS stamp and the planar PDMS substrate is introduced through the different contents of theused cross-linking agents; the prepared substrate and the prepared stamp are simultaneously subjected to OP treatment for 5 min, then the substrate and the stamp are immediately adhered, and heatingtreatment is performed so as to improve the contact adhesion effect between the stamp and the substrate; and the stamp is removed to make the soft part produce the cohesive energy breaking during theseparation of the stamp and the substrate, such that the PDMS ink is provided and is transferred to the hard part so as to obtain the PDMS film having the concave or convex pattern on the surface. According to the present invention, the operation is simple, the cost is low, and the disadvantages of limited application range and simple processing pattern of other related technologies are avoided.

Description

technical field [0001] The invention relates to the micro-nano processing technology of soft matter, in particular to a process method for patterning the surface of PDMS by using a cross-linking control transfer printing method. Background technique [0002] Polydimethylsiloxane (PDMS) is one of the most widely used silicon-based organic polymer materials. As a kind of silicone rubber, PDMS has many uses in outdoor insulation materials, caulking agents, lubricants, human body plastic implants, etc., and more importantly, it has a unique application prospect in micro-nano manufacturing. On the micro / nano scale, PDMS thick / thin films are widely used in soft etching technology, micro / nano fluid control, micro / nano electromechanical systems, biosensing and many other fields. These applications all rely on the surface microstructuring of PDMS. However, the current micro-nano processing technology of PDMS elastomers is very limited, and it is limited by the processing form, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/00C08J5/18C08L83/04B81C1/00
CPCB81C1/00103B81C1/00214C08J5/18C08J7/00C08J2383/04
Inventor 吴浪
Owner 吴浪
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