The Mechanical Aspects of Formation and Application of PDMS Bilayers Rolled into a Cylindrical Structure
A polydimethylsiloxane (PDMS) film with its surface being oxidized by a plasma treatment or a UV-ozone (UVO) treatment, that is, a bilayer made of PDMS and its oxidized surface layer, is known to roll into a cylindrical structure upon exposure to t...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
|
| Series: | International Journal of Polymer Science |
| Online Access: | http://dx.doi.org/10.1155/2015/758474 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | A polydimethylsiloxane (PDMS) film with its surface
being oxidized by a plasma treatment or a UV-ozone
(UVO) treatment, that is, a bilayer made of PDMS and
its oxidized surface layer, is known to roll into a
cylindrical structure upon exposure to the chloroform
vapor due to the mismatch in the swelling ratio
between PDMS and the oxidized layer by the chloroform
vapor. Here we analyzed the formation of the rolled
bilayer with the mechanical aspects: how the mismatch
in the swelling ratio of the bilayer induces rolling
of the bilayer, why any form of trigger that breaks
the symmetry in the in-plane stress level is needed to
roll the bilayer uniaxially, why the rolled bilayer
does not unroll in the dry state when there is no more
mismatch in the swelling ratio, and how the measured
curvature of rolled bilayer matches well with the
prediction by the theory. Moreover, for the use of the
rolled bilayer as the channel of the microfluidic
device, we examined whether the rolled bilayer
deforms or unrolls by the flow of the aqueous solution
that exerts the circumferential stress on the rolled
bilayer. |
|---|---|
| ISSN: | 1687-9422 1687-9430 |