The influence of alumino-silicate matrix composition on surface hydrophobic properties
AuthorsKljajević, Ljiljana M.
Todorović, Bratislav Ž.
Pavlović, Vladimir B.
Nenadović, Snežana S.
Article (Published version)
MetadataShow full item record
The purpose of this investigation is to investigate the hydrophobicity of geopolymers, new alumino-silicate materials and the influence of Si/Al ratio on their surface properties. Contact angle measurement (CAM) as reliable indicator of hydrophobicity was determined for synthesized geopolymers using water and ethylene-glycol as reference liquids. Geopolymers were synthesized from various precursors: Kaolin, bentonite and diatomite. Characterization of phase structure and microstructure was performed by XRD, FTIR, SEM/EDX methods. Contact angle measurements confirmed that the geopolymers synthesized from metakaolin are the most porous, which can be explained by the smallest Si/Al ratio. The maximum value of contact angle and free surface energy (110.2 mJ/m2) has been achieved for geopolymer synthesized by diatoms (GPMD). SEM micrograph of GPMD shows a homogeneous surface with some longitudinal cavities in the gel and is significantly different from the micrographs of other two geopolyme...r samples, GPMB and GPMK. © 2018 Authors.
Keywords:Metakaolin / Metadiatomite / Metabentonit / Geopolymer / Contact angle
Source:Science of Sintering, 2019, 51, 2, 163-173
- Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine (RS-45012)
- Functional, Functionalized and Advanced Nanomaterials (RS-45005)
- Slovak Grant Agency VEGA [1/0538/15]
- "Restoration and construction of infrastructure for ecological and environmental research at Matej Bel University in Banska Bystrica" [ITMS 262101200245]