Micro/Nanoscale bonding and surface glass transition temperature of polymers under carbon dioxide

Yong Yang; Dehua Liu; L. James Lee; David Tomasko

Micro/Nanoscale bonding and surface glass transition temperature of polymers under carbon dioxide

Yong Yang, Dehua Liu, L. James Lee, David Tomasko

Research output: Contribution to conference › Paper › peer-review

Abstract

Studies of polymer thin films revealed that properties of polymers at the surface are different from those in the bulk. The most striking among these properties is the glass transition temperature, T _g. In this study, the surface T _g of poly(DL-lactide-co-glycolide) (PLGA) under carbon dioxide (CO ₂) was evaluated by embedding gold nanoparticles onto PLGA surfaces. The T _g profiles at the surface were determined by measuring the apparent height of embedded nanoparticles using atomic force microscopy (AFM). It was shown that CO ₂ could greatly depress the T _g near the surface. Using this idea, we demonstrated near room temperature bonding of polymers at a length scale as small as 3.9 μm. This CO ₂ bonding technique was successfully applied to seal polystyrene-based microfluidic chips and construct three-dimensional (3D) PLGA tissue scaffolds with well-defined structure.

Original language	English
Pages	3095-3099
Number of pages	5
State	Published - 2004
Event	ANTEC 2004 - Annual Technical Conference Proceedings - Chicago, IL., United States Duration: May 16 2004 → May 20 2004

Conference

Conference	ANTEC 2004 - Annual Technical Conference Proceedings
Country/Territory	United States
City	Chicago, IL.
Period	05/16/04 → 05/20/04

Keywords

Atomic force microscopy
Carbon dioxide
Poly(DL-lactide-co-glycolide)
Surface T

Cite this

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title = "Micro/Nanoscale bonding and surface glass transition temperature of polymers under carbon dioxide",

abstract = "Studies of polymer thin films revealed that properties of polymers at the surface are different from those in the bulk. The most striking among these properties is the glass transition temperature, T g. In this study, the surface T g of poly(DL-lactide-co-glycolide) (PLGA) under carbon dioxide (CO 2) was evaluated by embedding gold nanoparticles onto PLGA surfaces. The T g profiles at the surface were determined by measuring the apparent height of embedded nanoparticles using atomic force microscopy (AFM). It was shown that CO 2 could greatly depress the T g near the surface. Using this idea, we demonstrated near room temperature bonding of polymers at a length scale as small as 3.9 μm. This CO 2 bonding technique was successfully applied to seal polystyrene-based microfluidic chips and construct three-dimensional (3D) PLGA tissue scaffolds with well-defined structure.",

keywords = "Atomic force microscopy, Carbon dioxide, Poly(DL-lactide-co-glycolide), Surface T",

author = "Yong Yang and Dehua Liu and Lee, {L. James} and David Tomasko",

year = "2004",

language = "English",

pages = "3095--3099",

note = "ANTEC 2004 - Annual Technical Conference Proceedings ; Conference date: 16-05-2004 Through 20-05-2004",

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TY - CONF

T1 - Micro/Nanoscale bonding and surface glass transition temperature of polymers under carbon dioxide

AU - Yang, Yong

AU - Liu, Dehua

AU - Lee, L. James

AU - Tomasko, David

PY - 2004

Y1 - 2004

N2 - Studies of polymer thin films revealed that properties of polymers at the surface are different from those in the bulk. The most striking among these properties is the glass transition temperature, T g. In this study, the surface T g of poly(DL-lactide-co-glycolide) (PLGA) under carbon dioxide (CO 2) was evaluated by embedding gold nanoparticles onto PLGA surfaces. The T g profiles at the surface were determined by measuring the apparent height of embedded nanoparticles using atomic force microscopy (AFM). It was shown that CO 2 could greatly depress the T g near the surface. Using this idea, we demonstrated near room temperature bonding of polymers at a length scale as small as 3.9 μm. This CO 2 bonding technique was successfully applied to seal polystyrene-based microfluidic chips and construct three-dimensional (3D) PLGA tissue scaffolds with well-defined structure.

AB - Studies of polymer thin films revealed that properties of polymers at the surface are different from those in the bulk. The most striking among these properties is the glass transition temperature, T g. In this study, the surface T g of poly(DL-lactide-co-glycolide) (PLGA) under carbon dioxide (CO 2) was evaluated by embedding gold nanoparticles onto PLGA surfaces. The T g profiles at the surface were determined by measuring the apparent height of embedded nanoparticles using atomic force microscopy (AFM). It was shown that CO 2 could greatly depress the T g near the surface. Using this idea, we demonstrated near room temperature bonding of polymers at a length scale as small as 3.9 μm. This CO 2 bonding technique was successfully applied to seal polystyrene-based microfluidic chips and construct three-dimensional (3D) PLGA tissue scaffolds with well-defined structure.

KW - Atomic force microscopy

KW - Carbon dioxide

KW - Poly(DL-lactide-co-glycolide)

KW - Surface T

UR - http://www.scopus.com/inward/record.url?scp=2442718026&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:2442718026

SP - 3095

EP - 3099

T2 - ANTEC 2004 - Annual Technical Conference Proceedings

Y2 - 16 May 2004 through 20 May 2004

ER -

Micro/Nanoscale bonding and surface glass transition temperature of polymers under carbon dioxide

Abstract

Conference

Keywords

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