Tuneable swelling of thermo- and pH-responsive copolymer films

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Martin Kaufmann - , Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Zentrum für Biomaterialien Dresden (MBZ) (Autor:in)
  • Yunfei Jia - , Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Zentrum für Biomaterialien Dresden (MBZ) (Autor:in)
  • Lars Renner - , Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Zentrum für Biomaterialien Dresden (MBZ) (Autor:in)
  • Smrati Gupta - , Max Bergmann Zentrum für Biomaterialien Dresden (MBZ) (Autor:in)
  • Dirk Kuckling - , Universität Paderborn (Autor:in)
  • Carsten Werner - , Center for Regenerative Therapies Dresden (CRTD), Professur für Biofunktionale Polymermaterialien (gB/IPF), Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Zentrum für Biomaterialien Dresden (MBZ) (Autor:in)
  • Tilo Pompe - , Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Zentrum für Biomaterialien Dresden (MBZ) (Autor:in)

Abstract

We report on thermo- and pH-responsive copolymer films consisting of N-isopropylacrylamide (NIPAAm) and different carboxyalkylacrylamides exhibiting switchable swelling states over a wide range of temperatures and pH-values. The copolymers were covalently grafted as brush-like films onto solid substrates. Analysis by quartz crystal microbalance with dissipation monitoring revealed the phase transition behaviour to be sensitively controlled by the balance of polar and non-polar interactions, which could be dissected into the local level of comonomer structure as well as the more global level of copolymer chain composition. Remarkably, the phase transition was determined to be in general lower than in solution, which originated from the higher local polymer concentration of the swollen surface-grafted copolymer layer as explained by the general phase behaviour based on classical theory of polymers in solutions. The different swelling profiles of the environmentally responsive copolymer films are expected to offer valuable options for the design of switchable interfaces as, for instance, applicable for the modulation of model biosystems.

Details

OriginalspracheEnglisch
Seiten (von - bis)937-944
Seitenumfang8
FachzeitschriftSoft matter
Jahrgang6
Ausgabenummer5
PublikationsstatusVeröffentlicht - 2010
Peer-Review-StatusJa

Externe IDs

ORCID /0000-0003-0189-3448/work/162347698

Schlagworte