All

What are you looking for?

All
Projects
Results
Organizations

Quick search

  • Projects supported by TA ČR
  • Excellent projects
  • Projects with the highest public support
  • Current projects

Smart search

  • That is how I find a specific +word
  • That is how I leave the -word out of the results
  • “That is how I can find the whole phrase”

Influence of Surfactants on SiO2 Aerogels

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F18%3APU124366" target="_blank" >RIV/00216305:26620/18:PU124366 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Influence of Surfactants on SiO2 Aerogels

  • Original language description

    Silica aerogels, as well as those consisting of other metal oxides (alumina, zirconia, titania or mixture of these oxides), are extremely porous (up to 99%) high tech materials with very high specific surface areas (1000m2/g) and low thermal conductivity (below 0,02W/mK). The typical aerogel production process includes several steps and starts with the preparation of a sol. The next step includes a casting of the sol to obtain the required gel form via sol – gel transition and its drying in a supercritical drying chamber at supercritical conditions of CO2 to obtain the desired product. Hence it is of critical importance to determine how processing parameters (type of solvent, catalyst, surfactant, a medium of drying temperature, pressure, the presence of a surfactant template) influence the microstructure, morphology, transparency and other properties of the obtained aerogels. In this work, we studied the effect on three synthesized systems: SiO2-Triton, SiO2-PVP and SiO2-F1427 using TMOS, MeOH-NH4OH-H2O at constant molar ratios of reactants 1:7:0.7:2.7, respectively. Chemical, structural and morphological results were performed by using FTIR and SEM techniques. SEM analysis demonstrated a change in agglomerate size distribution (5-10nm) depending on the system. Furthermore, the increase in the amount of F217 agent increased both the density, measured by sample dimensions, of produced SiO2-F127 aerogels from 0.02 to 0.075 g/cm3 along with the pore size.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

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

Result continuities

  • Project

    <a href="/en/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2018

  • Confidentiality

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

Data specific for result type

  • Article name in the collection

    Metal 2017 Conference Prosceedings

  • ISBN

    978-80-87294-79-6

  • ISSN

  • e-ISSN

  • Number of pages

    6

  • Pages from-to

    1135-1140

  • Publisher name

    TANGER Ltd.

  • Place of publication

    Ostrava

  • Event location

    Brno

  • Event date

    May 24, 2017

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article

    000434346900181