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Hydrophobic impregnation of geopolymer composite by ethoxysilanes

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00010669%3A_____%2F18%3AN0000085" target="_blank" >RIV/00010669:_____/18:N0000085 - isvavai.cz</a>

  • Result on the web

    <a href="https://ojs.cvut.cz/ojs/index.php/ap/article/view/4702/4727" target="_blank" >https://ojs.cvut.cz/ojs/index.php/ap/article/view/4702/4727</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.14311/AP.2018.58.0184" target="_blank" >10.14311/AP.2018.58.0184</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Hydrophobic impregnation of geopolymer composite by ethoxysilanes

  • Original language description

    A geopolymer composite was impregnated by incorporating the hydrophobic alkyl group on the outer surface and in the inner structure of the geopolymer. Ethoxysilanes 1H,1H,2H,2H perfluoroctyltriethoxysilane and hexadecyltrimethoxysilane were used as the source of hydrophobic groups. Three types of solutions based on the ethoxysilanes were prepared according to adapted procedures. The modification of the geopolymer composites was done by their immersion into the hydrophobic solutions followed by drying at a laboratory or elevated temperature. The effectivity of the procedure was evaluated by measuring the water contact angle on the surface of the modified composite and by measuring the water uptake and stiffness of the composite. The results confirmed that the silanes hydrolyzed in sol containing SiO2 nanoparticles have a higher hydrophobization effect than solutions of simply hydrolyzed silanes. The resulting impregnation procedure led to the change of the geopolymer composite surface from hydrophilic to hydrophobic.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2018

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Acta Polytechnica

  • ISSN

    1210-2709

  • e-ISSN

    1805-2363

  • Volume of the periodical

    58

  • Issue of the periodical within the volume

    3

  • Country of publishing house

    CZ - CZECH REPUBLIC

  • Number of pages

    5

  • Pages from-to

    184-188

  • UT code for WoS article

    000438884700005

  • EID of the result in the Scopus database

    2-s2.0-85049523105