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Biomicrofluidics / Volume 6 / Issue 1 / FABRICATION AND LABORATORY METHODS

Biomicrofluidics 6, 016501 (2012); http://dx.doi.org/10.1063/1.3673251 (10 pages)

Oxygen and nitrogen plasma hydrophilization and hydrophobic recovery of polymers

Ville Jokinen, Pia Suvanto, and Sami Franssila

Department of Materials Science and Engineering, Aalto University, School of Chemical Technology, Espoo, Finland

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(Received 11 October 2011; accepted 7 December 2011; published online 3 January 2012)

Plasma hydrophilization and subsequent hydrophobic recovery are studied for ten different polymers of microfabrication interest: polydimethylsiloxane (PDMS), polymethylmethacrylate, polycarbonate, polyethylene, polypropylene, polystyrene, epoxy polymer SU-8, hybrid polymer ORMOCOMP, polycaprolactone, and polycaprolactone/D,L-lactide (P(CL/DLLA)). All polymers are treated identically with oxygen and nitrogen plasmas, in order to make comparisons between polymers as easy as possible. The primary measured parameter is the contact angle, which was measured on all polymers for more than 100 days in order to determine the kinetics of the hydrophobic recovery for both dry stored and rewashed samples. Clear differences and trends are observed both between different polymers and between different plasma parameters.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL
    1. Polymers
    2. Plasma treatments
    3. Contact angle measurements
    4. Samples
  3. POLYMER CONTACT ANGLES
    1. PDMS
    2. PMMA
    3. PC
    4. PE
    5. PP
    6. PS
    7. SU-8
    8. ORMOCOMP
    9. PCL
    10. P(CL/DLLA)
  4. CONCLUSIONS AND SUMMARY
    1. Oxygen/nitrogen plasma of dry stored samples
    2. Long/short treatment
    3. The extent of hydrophobic recovery of dry stored samples
    4. Dry stored/rewashed samples
    5. Most hydrophilic polymers initially and after 100 days

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KEYWORDS and PACS

Keywords

contact angle, hydrophobicity, microfabrication, nitrogen, oxygen, plasma materials processing, polymers

PACS

  • 52.77.-j

    Plasma applications

  • 61.41.+e

    Polymers, elastomers, and plastics

  • 68.03.Cd

    Surface tension and related phenomena

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3673251

PUBLICATION DATA

ISSN

1932-1058 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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