English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Acrylic acid (AA) nanocomposite hydrogels (NCH) containing different kinds of SiO 2  nanoparticles were prepared by way of free radical polymerization. The polymerization conditions were optimized considering the initiator and monomer concentrations in the mixture, as well as the reaction temperature and time. SiO 2  nanoparticles were used in original (neutral), NH 2  modified (hydrophilic) and perlite forms. Nanocomposite hydrogels that contain NH 2  modified nano-SiO 2  were found to present swelling values higher than those of the original acrylic acid nanocomposite hydrogel and the nanocomposite hydrogel that contain original SiO 2 . AA-perlite nanocomposite hydrogels were used to achieve the best thermal stability, although the perlite-doped hydrogels exhibit less swelling due to the large particle size of perlite and its lower SiO 2  content. FESEM and mapping analyses were conducted to verify the incorporation of SiO 2  nanoparticles into the hydrogel structure. Amorphous structures were determined by an XRD analysis. Thermal stability of hydrogels was measured by TG-DTA. The thermal stabilities of NH 2 -modified SiO 2 - and perlite-doped nanocomposite hydrogels were found to be higher than those of plain hydrogel and original SiO 2 -doped nanocomposite hydrogels.

Synthesis and characterization of acrylic acid-based SiO 2 nanocomposite hydrogels