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Elastomeric photo-actuators and their investigation by confocal laser scanning microscopy
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SYSNO ASEP 0396102 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Elastomeric photo-actuators and their investigation by confocal laser scanning microscopy Tvůrce(i) 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)Zdroj.dok. Smart Materials and Structures. - : Institute of Physics Publishing - ISSN 0964-1726
Roč. 22, č. 10 (2013), 104001_1-104001_10Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova nanocomposites ; multiwalled carbon nanotubes ; electron microscopy Vědní obor RIV CD - Makromolekulární chemie Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000324645000003 DOI 10.1088/0964-1726/22/10/104001 Anotace 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. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2014
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