Towards smart "lining" for microfluidic channels with stimulus responsive polymers

Lionel Dos Ramos

Research output: ThesisPhD Thesis - Research UT, graduation UT

68 Downloads (Pure)

Abstract

In this Thesis, the development and the characterization of polymeric films with the ultimate goal of switching the properties of functionalized microchannel surfaces is presented. The coatings were mainly based on two types of stimulus responsive polymers, temperature responsive poly(N-isopropylacrylamide)(PNIPAM) and redox-responsive poly(ferrocenylsilane) (PFS). These polymers allow one to control wettability, adhesion force, and friction which are important variables for preparing designer microchannels. Surface switching was primarily studied by colloid probe AFM. The motivation for the choice of PNIPAM and PFS is rationalized by their responsiveness and by the opportunities for anchoring these polymers to solid substrates, allowing one to functionalize the inner walls of microfluidic devices and tune the surface properties of these walls to control flow. As a proof of concept, we present a study of PFS functionalized channels for switchable delay valves.
Original languageEnglish
Awarding Institution
  • University of Twente
Supervisors/Advisors
  • Vancso, Gyula J., Supervisor
  • Hempenius, Mark A., Advisor
Award date1 Apr 2016
Place of PublicationEnschede
Publisher
Print ISBNs978-90-365-4089-6
DOIs
Publication statusPublished - 1 Apr 2016

Fingerprint

Linings
Microfluidics
Polymers
Microchannels
Colloids
Polymer films
Flow control
Surface properties
Wetting
Adhesion
Friction
Coatings
Substrates
Temperature
poly-N-isopropylacrylamide

Keywords

  • METIS-316613
  • IR-100352

Cite this

Dos Ramos, Lionel. / Towards smart "lining" for microfluidic channels with stimulus responsive polymers. Enschede : Universiteit Twente, 2016. 216 p.
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Towards smart "lining" for microfluidic channels with stimulus responsive polymers. / Dos Ramos, Lionel.

Enschede : Universiteit Twente, 2016. 216 p.

Research output: ThesisPhD Thesis - Research UT, graduation UT

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T1 - Towards smart "lining" for microfluidic channels with stimulus responsive polymers

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AB - In this Thesis, the development and the characterization of polymeric films with the ultimate goal of switching the properties of functionalized microchannel surfaces is presented. The coatings were mainly based on two types of stimulus responsive polymers, temperature responsive poly(N-isopropylacrylamide)(PNIPAM) and redox-responsive poly(ferrocenylsilane) (PFS). These polymers allow one to control wettability, adhesion force, and friction which are important variables for preparing designer microchannels. Surface switching was primarily studied by colloid probe AFM. The motivation for the choice of PNIPAM and PFS is rationalized by their responsiveness and by the opportunities for anchoring these polymers to solid substrates, allowing one to functionalize the inner walls of microfluidic devices and tune the surface properties of these walls to control flow. As a proof of concept, we present a study of PFS functionalized channels for switchable delay valves.

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