Number of the records: 1
Fast temperature-responsive nanocomposite PNIPAM hydrogels with controlled pore wall thickness: force and rate of T-response
- 1.
SYSNO ASEP 0382267 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fast temperature-responsive nanocomposite PNIPAM hydrogels with controlled pore wall thickness: force and rate of T-response Author(s) Depa, Katarzyna (UMCH-V)
Strachota, Adam (UMCH-V) RID, ORCID
Šlouf, Miroslav (UMCH-V) RID, ORCID
Hromádková, Jiřina (UMCH-V) RIDSource Title European Polymer Journal. - : Elsevier - ISSN 0014-3057
Roč. 48, č. 12 (2012), s. 1997-2007Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords porous ; nanocomposite ; hydrogels Subject RIV JI - Composite Materials R&D Projects GA106/09/1101 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000311600400004 DOI 10.1016/j.eurpolymj.2012.09.007 Annotation Fast thermoresponsive porous hydrogels based on the PNIPAM–silica nanocomposite were prepared and optimized in order to obtain increased force (pressure) response to temperature stimuli. This was achieved by increasing pore wall thickness via changing the monomers concentration during the hydrogels’ cryogenic synthesis. The mechanically strong and compact pore structure of the best gel made it possible to increase the force (pressure) response 3 times and the shear modulus 4 times, while the volume ratio of swollen to deswollen state remained unchanged, and the kinetics of the T-response was only moderately slower than in the case of the analogous ultra-fast responsive soft gels. The porous structure of the hydrogels (SEM), the dispersion and particle size of the nanofiller in the pore walls (TEM), as well as the swelling behavior and time-resolved force response to T-change are discussed in this work. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2013
Number of the records: 1