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Dispersion of aqueous nano-sized alumina suspensions using cationic polyelectrolyte
| Content Provider | Semantic Scholar |
|---|---|
| Author | Shin, Yu-Jen Su, Chia-Chi Shen, Yun-Hwei |
| Copyright Year | 2006 |
| Abstract | Abstract In this paper, we investigate and report the effects of a cationic polyelectrolyte, polydiallydimethylammonium chloride (PDADMAC), on the stability of nano-sized alumina (α-Al 2 O 3 ) suspension. Due to the static electrical repulsion interactions, PDADMAC show significant adsorption on α-Al 2 O 3 only at alkaline pH. Considerable amount of non-adsorbed free PDADMAC exist in α-Al 2 O 3 suspensions dispersed by PDADMAC at acidic and neutral pH. At 1.0 wt.% PDADMAC addition, α-Al 2 O 3 became highly positively charged (>50 mV) in the entire pH range contrast with that the stability of α-Al 2 O 3 suspension is enhanced only over the basic pH range in the presence of anionic polyelectrolyte. Free PDADMAC electrolyte in suspension results in increasing viscosity of α-Al 2 O 3 suspensions dispersed with PDADMAC at alkaline and neutral pH. However, non-adsorbed free PDADMAC in suspension do not contribute to viscosity increase in acidic α-Al 2 O 3 suspensions and α-Al 2 O 3 suspensions dispersed with PDADMAC show the best flow behavior at acidic pH. |
| Starting Page | 1964 |
| Ending Page | 1971 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.materresbull.2006.01.032 |
| Volume Number | 41 |
| Alternate Webpage(s) | http://www.ncku.edu.tw/source/home/Yun-Hwei-Shen/13.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.materresbull.2006.01.032 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
