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Super-porous nanocomposite PNIPAm hydrogels reinforced with titania nanoparticles, displaying a very fast temperature response as well as pH-sensitivity

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F14%3A00435585" target="_blank" >RIV/61389013:_____/14:00435585 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1016/j.eurpolymj.2014.07.033" target="_blank" >http://dx.doi.org/10.1016/j.eurpolymj.2014.07.033</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.eurpolymj.2014.07.033" target="_blank" >10.1016/j.eurpolymj.2014.07.033</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Super-porous nanocomposite PNIPAm hydrogels reinforced with titania nanoparticles, displaying a very fast temperature response as well as pH-sensitivity

  • Original language description

    Super-porous nanocomposite hydrogels, based on PNIPAm matrix and reinforced by acid- and base-resistant TiO2 nanoparticles were prepared via freezing polymerization. The hydrogels display a fast swelling response to temperature (potential application asmechanical actuators), which is enabled by the nano-reinforcement. The reinforcing effect of TiO2 was strongly enhanced (by nearly one order) through the incorporation of small amounts (2.5 mol%) of sodium methacrylate (SMA) as comonomer, which stronglyadsorbs on the TiO2 particles? surface, in analogy to ionic double layer adsorption of salts on free TiO2 colloid particles. The SMA adsorption is so strong, that the pH-responsivity of the swelling of the PNIPAm-SMA copolymer is practically suppressed.A significant pH-responsivity was found only in such poly(NIPAm-co-SMA)/TiO2 gels, which contained high amounts of chemical crosslinker. In these rather rigid gels, some of the SMA units were topologically prevented from adsorption to TiO

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    JI - Composite materials

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GAP107%2F12%2F2445" target="_blank" >GAP107/12/2445: SiOC ceramic foam from pyrolyzed polymer precursor as a core of thermally stable composite sandwich structures</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2014

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    European Polymer Journal

  • ISSN

    0014-3057

  • e-ISSN

  • Volume of the periodical

    59

  • Issue of the periodical within the volume

    October

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    12

  • Pages from-to

    341-352

  • UT code for WoS article

    000343341100037

  • EID of the result in the Scopus database