Colloidal dispersion gels based on sulfonated polyacrylamide and chromium triacetate for harsh-environment
| Autor: | Ehsan Alvand, Jamal Aalaie, Vali Ahmad Sajjadian, Mahmood Hemmati |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Materials science Scanning electron microscope General Chemical Engineering Polyacrylamide chemistry.chemical_element 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Viscosity chemistry.chemical_compound Colloid Chromium Rheology chemistry Dynamic light scattering Chemical engineering Polymer chemistry 0210 nano-technology |
| Zdroj: | Korean Journal of Chemical Engineering. 33:1954-1963 |
| ISSN: | 1975-7220 0256-1115 |
| Popis: | The aim of this study was to outline the preparation of colloidal dispersion gels (CDGs) based on sulfonated polyacrylamide (SPA) and chromium triacetate and investigating their stability in harsh conditions. The effect of crosslinker, polymer concentration, salinity, and gelation time and temperature on the formation, rheological behavior and size distribution of CDGs and also their thermo-chemical stabilities were investigated. It was found that the shear viscosity and size of CDGs decreased with increasing of preparation time. Dynamic light scattering and scanning electron microscopy evaluations showed that the size of CDGs particles decreased with increasing of the Cr3+ concentration. In addition, SPA solution had yield stress, while CDGs did not. The elevation of temperature inhibits while the salinity does not disturb the formation of CDGs. In the systems with lower polymer concentration, CDGs were formed. Conversely, in the systems with higher polymer concentration, bulk gels were formed. After aging, CDG sample had a minimal viscosity loss, indicating its exceptional thermo-chemical stability. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink