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Elastomeric photo-actuators and their investigation by confocal laser scanning microscopy
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SYSNO ASEP 0396102 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Elastomeric photo-actuators and their investigation by confocal laser scanning microscopy Author(s) Czaniková, K. (SK)
Ilčíková, M. (SK)
Krupa, I. (QA)
Mičušík, M. (SK)
Kasák, P. (SK)
Pavlova, Ewa (UMCH-V) RID
Mosnáček, J. (SK)
Chorvát Jr., D. (SK)
Omastová, M. (SK)Source Title Smart Materials and Structures. - : Institute of Physics Publishing - ISSN 0964-1726
Roč. 22, č. 10 (2013), 104001_1-104001_10Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords nanocomposites ; multiwalled carbon nanotubes ; electron microscopy Subject RIV CD - Macromolecular Chemistry Institutional support UMCH-V - RVO:61389013 UT WOS 000324645000003 DOI 10.1088/0964-1726/22/10/104001 Annotation The photo-actuation behavior of nanocomposites based on ethylene–vinylacetate copolymer (EVA) and styrene–isoprene–styrene (SIS) block copolymer filled with well-dispersed and modified multiwalled carbon nanotubes (MWCNTs) is discussed in this paper. The nanocomposites were prepared by casting from solution. To improve the dispersion of the MWCNTs in EVA, the MWCNT surface was modified with a non-covalent surfactant, cholesteryl 1-pyrenecarboxylate (PyChol). To prepare SIS nanocomposites, the MWCNT surface was covalently modified with polystyrene chains. The good dispersion of the filler was confirmed by transmission electron microscopy (TEM). Special, custom-made punch/die molds were used to create a Braille element (BE)-like shape, which under shear forces induces a uniaxial orientation of the MWCNTs within the matrix. The uniaxial orientation of MWCNTs is an essential precondition to ensure the photo-actuating behavior of MWCNTs in polymeric matrices. The orientation of the MWCNTs within the matrices was examined by scanning electron microscopy (SEM). Nanocomposite BEs were illuminated from the bottom by a red light-emitting diode (LED), and the photo-actuation was investigated by confocal laser scanning microscopy (CLSM). When the BEs were exposed to light, a temporary increase in the height of the element was detected. This process was observed to be reversible: after switching off the light, the BEs returned to their original shape and height. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2014
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