Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 20, Issue 23, Pages 4827-4839Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b927314j
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Funding
- DFG [Forschungsstipendium 548592 AN 726/1-1]
- Kekule scholarship
- AWM
- ERDF
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A new responsive nanocomposite material consisting of a poly-(N-isopropylacrylamide) hydrogel and super-crosslinking'' silica nanoparticles was prepared by mixing both components in solution, spincoating a thin film, and photocrosslinking by UV irradiation. Detailed analysis of the thermal response of these water-swollen films by means of surface plasmon resonance and optical waveguide spectroscopy revealed that the composite is very stable and has excellent responsive properties; it is of high optical homogeneity; admixture of the nanoparticles (up to 50%-wt) does not affect the critical volume collapse temperature; and swell-collapse cycles are highly reproducible and display only limited hysteresis. Thus, the composite is promising as a scaffold for further functionalisation and incorporation in sensors or actuators.
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