Acid-basic surface properties of clay disperse fillers
| Autor: | Igor Khmyrov, Anton Khryapynskyy, Viktor Sopov, Vladimir Andronov, Yuliya Danchenko |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Surface (mathematics)
inorganic chemicals 020303 mechanical engineering & transports Materials science 0203 mechanical engineering Chemical engineering lcsh:TA1-2040 021105 building & construction 0211 other engineering and technologies 02 engineering and technology lcsh:Engineering (General). Civil engineering (General) complex mixtures |
| Zdroj: | MATEC Web of Conferences, Vol 230, p 03004 (2018) |
| Popis: | The mineral composition, surface morphology, dispersion and specific surface of dispersed clay fillers of various chemical nature have been experimentally determined. As materials for research used clay mineral disperse fillers of various chemical and mineral composition: bentonite clay, kaolinite clay and diabase flour. Using the thermogravimetric (TG) analysis and the differential thermal analysis (DTA), the structure of the hydroxyl-hydrated surface layer of the filler surface has been studied. The amount and acidity of the surface active centers of clay fillers have been investigated using pK-metric and pH-metric methods. It was established that the mineral composition is the determining factor in the acid-base surface properties of clay fillers. The thickness of the hydroxyl-hydrated surface layer affects the acidity of the surface, at certain large sizes. It has been shown that clay fillers, which include montmorillonite as the dominant minerals, are characterized by higher acidity than the fillers that consist of kaolinite. In the mixed clay fillers, the acid-base properties of the surface depend on the chemical nature of the impurities and related minerals. |
| Databáze: | OpenAIRE |
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