Method for manufacturing pdms device and pdms device manufactured thereby

Patent metadata

Field	Value
Publication number	US-2022063211-A1
Application number	US-202117365105-A
Country	US
Kind code	A1
Filing date	Jul 1, 2021
Priority date	Aug 25, 2020
Publication date	Mar 3, 2022
Grant date	—

Abstract

A method for manufacturing a PDMS device in accordance with an exemplary embodiment of the present invention surface treats the entire surface of a pattern with a thiol group (—SH), so that a hydrogel may be connected to the surface of the pattern by a covalent bond under ultraviolet rays. Therefore, a PDMS device manufactured by the above method has an advantage in that the shape thereof may be stably maintained without the swelling or desorption of a hydrogel even when an electrolyte is filled in a pattern.

First claim

What is claimed is:

1 . A method for manufacturing a PDMS device, the method comprising:
(a) preparing a first PDMS substrate and a second PDMS substrate at least one of which has a pattern formed thereon; (b) introducing a hydroxyl group (—OH) on the surface of the first PDMS substrate and the surface of the second PDMS substrate; (c) introducing a thiol group (—SH) on the surface of the first PDMS substrate, and introducing an epoxide on the surface of the second PDMS substrate; (d) bonding the first PDMS substrate and the second PDMS substrate to form a PDMS structure; and (e) substituting the epoxide present on the surface of the pattern of the PDMS structure with a thiol group.

2 . The method of claim 1 , wherein Step (b) is performed by irradiating the first PDMS substrate and the second PDMS substrate with ultraviolet rays in an ozone atmosphere.

3 . The method of claim 1 , wherein the introducing of a thiol group (—SH) on the surface of the first PDMS substrate in Step (c) is performed by dissolving at least one selected from the group consisting of (3-Mercaptopropyl)trimethoxysilane, (3-Mercaptopropyl)trimethoxy-d9-silane, and Bis[3-(triethoxysilyl)propyl] tetrasulfide in a solvent, and then immersing the first PDMS substrate therein.

4 . The method of claim 1 , wherein the introducing of an epoxide on the surface of the second PDMS substrate in Step (c) is performed by dissolving at least one selected from the group consisting of (3-Glycidyloxypropyl)trimethoxysilane and Diethoxy(3-glycidyloxypropyl)methylsilane in a solvent, and then immersing the second PDMS substrate therein.

5 . The method of claim 1 , wherein Step (e) is one in which a compound having 2 or more thiol groups (—SH) is dissolved together with a base in a solvent, and then allowed to come into contact with the pattern, thereby introducing a thiol group while the epoxide ring is opened.

6 . The method of claim 5 , wherein:
the compound having 2 or more thiol groups (—SH) is at least one selected from the group consisting of 1,2-Ethanedithiol, Propanedithiol, 2,3-Dimercapto-1-propanol, Poly(ethylene glycol) dithiolm and 4,4 ; and the base is at least one selected from the group consisting of 1,8-Diazabicyclo[5.4.0]undec-7-ene, and 1,5-Diazabicyclo[4.3.0]non-5-ene.

7 . The method of claim 1 , further comprising, after Step (e) is performed, injecting a hydrogel monomolecular aqueous solution at one position of the pattern, and then irradiating the pattern with ultraviolet rays to fix a hydrogel to the thiol group on the surface of the pattern.

8 . A PDMS device including a PDMS structure formed by bonding a first PDMS substrate and a second PDMS substrate at least one of which has a pattern formed thereon,
wherein the first PDMS substrate and the second PDMS substrate are bonded by the coupling of a thiol group (—SH) formed on the surface of the first PDMS substrate and an epoxide of the second PDMS substrate, and a thiol group (—SH) is formed on the surface of the pattern.

9 . The PDMS device of claim 8 , wherein among walls constituting the pattern, the thiol group is formed through a connection body on the surface of a wall configured by the second PDMS substrate, and one end of the connection body is connected to a hydroxyl group (—OH) on the surface of the second PDMS substrate, whereas the other end of the connection body is connected to the thiol group while the epoxide ring is opened.

10 . The PDMS device of claim 8 , wherein the pattern comprises:
a first channel formed long in one direction; a second channel branched from the first channel; a switch formed at an end of the second channel; and an electrolyte filled in the first channel, wherein when the switch is pressed, a non-conductive material or air positioned in the second channel flows into the first channel, so that the electrolyte filled in the first channel is disconnected.

11 . The PDMS device of claim 8 , wherein the pattern comprises:
a channel filled with an electrolyte; and a diode unit formed in the middle of the channel, wherein a p-type hydrogel and an n-type hydrogel are formed facing and in contact with each other in the diode unit, and only the p-type hydrogel is exposed on one side of the channel, whereas only the n-type hydrogel is exposed on the other side of the channel.

Assignees

• Seoul Nat Univ R&Db Foundation

Inventors

• Chung Taek Dong
• Joo Young-Chang
• Sun Jeong-Yun
• Han Seok Hee
• Kim Sung Il
• Lee Hae-Ryung
• Lim Seung-Min

Classifications

• H10D8/045

  of PN junction diodes · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• C08G77/32

  Post-polymerisation treatment · CPC title

• C08G77/38

  Polysiloxanes modified by chemical after-treatment · CPC title

• C08G77/392 Primary

  containing sulfur · CPC title