| Studies on bitumen-silica interaction in surfactants and divalent cations solutions by atomic force microscopy; Studies on bitumen-silica interaction in surfactants and divalent cations solutions by atomic force microscopy | |
| Department | OSSO国家重点实验室 ; OSSO国家重点实验室 |
Zhang Y(张燕)1,2,3 ; Ding MS(丁明山)1,2; Liu J(刘娟)1,2; Jia WH(贾卫红)1; Ren SL(任嗣利)1; Ren SL(任嗣利)
| |
| The second department | 固体润滑国家重点实验室 ; 固体润滑国家重点实验室 |
| 2015 ; 2015 | |
| Source Publication | Colloids and Surfaces A: Physicochemical and Engineering Aspects
 ; Colloids and Surfaces A: Physicochemical and Engineering Aspects
|
| ISSN | 0927-7757 ; 0927-7757 |
| Volume | 482Pages:241-247 |
| Abstract | Synergistic effects of surfactants and divalent metal ions on bitumen–silica interaction were investigated in various pH solutions by using atomic force microscope (AFM). Zeta potential measurements were carried out and the extended DLVO theory was employed to interpret the bitumen–silica interaction behaviors. The AFM force measurements showed that the presence of cationic surfactant of dodecyltrimethylammonium chloride (DTAC) caused a strong long-range attractive force and high adhesive force, which were considerably reduced as divalent metal ions of Ca2+ or Mg2+ added in the acid solutions. However, the long-range repulsive force changed to attractive force compounded with a relative high adhesion when both the anionic surfactant of sodium dodecylbenzene sulfonate (SDBS) and divalent metal ions of Ca2+ or Mg2+ presented in the alkaline solution. Mechanism on bitumen–silica interaction behaviors at various conditions was discussed. It was suggested that changes of surface wettability arising from the adsorption of surfactants on silica and bitumen surfaces were responsible for the variation of the bitumen–silica interactions. The preferential adsorption of the divalent metal ions of Ca2+ or Mg2+ on silica and bitumen surfaces acted as either a barrier to prevent the cationic surfactants from adsorbing or a bridge to anchor the anionic surfactants. The generation of the hydrophobic attraction between bitumen and silica was supported by the extended DLVO theory. It is believed that the findings in this work have a guideline of controlling the oilsands processing condition to obtain a high bitumen recovery and good froth quality.; Synergistic effects of surfactants and divalent metal ions on bitumen–silica interaction were investigated in various pH solutions by using atomic force microscope (AFM). Zeta potential measurements were carried out and the extended DLVO theory was employed to interpret the bitumen–silica interaction behaviors. The AFM force measurements showed that the presence of cationic surfactant of dodecyltrimethylammonium chloride (DTAC) caused a strong long-range attractive force and high adhesive force, which were considerably reduced as divalent metal ions of Ca2+ or Mg2+ added in the acid solutions. However, the long-range repulsive force changed to attractive force compounded with a relative high adhesion when both the anionic surfactant of sodium dodecylbenzene sulfonate (SDBS) and divalent metal ions of Ca2+ or Mg2+ presented in the alkaline solution. Mechanism on bitumen–silica interaction behaviors at various conditions was discussed. It was suggested that changes of surface wettability arising from the adsorption of surfactants on silica and bitumen surfaces were responsible for the variation of the bitumen–silica interactions. The preferential adsorption of the divalent metal ions of Ca2+ or Mg2+ on silica and bitumen surfaces acted as either a barrier to prevent the cationic surfactants from adsorbing or a bridge to anchor the anionic surfactants. The generation of the hydrophobic attraction between bitumen and silica was supported by the extended DLVO theory. It is believed that the findings in this work have a guideline of controlling the oilsands processing condition to obtain a high bitumen recovery and good froth quality. |
| Keyword | Oil Sands Oil Sands Atomic Force Microscope Atomic Force Microscope Surfactants Surfactants Divalent Metal Ions Divalent Metal Ions Dlvo Theory Dlvo Theory Surface Wettability Surface Wettability |
| Subject Area | 物理化学与绿色催化 ; 物理化学与绿色催化 |
| DOI | 10.1016/j.colsurfa.2015.05.012 ; 10.1016/j.colsurfa.2015.05.012 |
| Funding Organization | the National Natural Science Foundation of China (Grant No. 51374195);the “Top Hundred Talents Program” held by the Chinese Academy of Sciences ; the National Natural Science Foundation of China (Grant No. 51374195);the “Top Hundred Talents Program” held by the Chinese Academy of Sciences |
| Indexed By | SCI ; SCI |
| If | 2.760 ; 2.760 |
| Language | 英语 ; 英语 |
| Funding Project | 羰基金属功能材料课题组 ; 羰基金属功能材料课题组 |
| compositor | 第一作者单位 ; 第一作者单位 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/18586 |
| Collection | 羰基合成与选择氧化国家重点实验室（OSSO） 固体润滑国家重点实验室（LSL） |
| Corresponding Author | Ren SL(任嗣利) |
| Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Lanzhou Jiaotong Univ, Sch Traff & Transportat, Lanzhou 730070, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang Y,Ding MS,Liu J,et al. Studies on bitumen-silica interaction in surfactants and divalent cations solutions by atomic force microscopy, Studies on bitumen-silica interaction in surfactants and divalent cations solutions by atomic force microscopy[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, Colloids and Surfaces A: Physicochemical and Engineering Aspects,2015, 2015,482, 482:241-247, 241-247. |
| APA | Zhang Y,Ding MS,Liu J,Jia WH,Ren SL,&任嗣利.(2015).Studies on bitumen-silica interaction in surfactants and divalent cations solutions by atomic force microscopy.Colloids and Surfaces A: Physicochemical and Engineering Aspects,482,241-247. |
| MLA | Zhang Y,et al."Studies on bitumen-silica interaction in surfactants and divalent cations solutions by atomic force microscopy".Colloids and Surfaces A: Physicochemical and Engineering Aspects 482(2015):241-247. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 2015241-247.pdf（1254KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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