Aggregation of a Cationic Gemini Surfactant with a Chelating Molecule and Effects from Calcium Ions
文献类型：期刊论文
| 作者 | Zhao, Weiwei1,3,4; Song, Kai2,3; Chen, Yao1,3; Wang, Hua1,3; Liu, Zhang1,3; Shi, Qiang2,3; Huang, Jianbin4; Wang, Yilin1,3 |
| 刊名 | LANGMUIR
 |
| 出版日期 | 2017-11-07 |
| 卷号 | 33期号:44页码:12719-12728 |
| 英文摘要 | The aggregation behavior of cationic ammonium gemini surfactant hexamethylene-1,6-bis(dodecyldimethylammonium bromide) (12-6-12) with chelating molecule ethylenediaminetetraacetic acid (EDTA) and the effects of calcium bromide (CaBr2) on the structure and morphology of the aggregates in the mixture have been investigated by surface tension, isothermal titration microcalorimetry, electrical conductivity, zeta potential, dynamic light scattering, cryogenic transmission electron microscopy, freeze-fracture transmission electron microscopy, and H-1 NMR techniques. It was found that the electrostatic attraction between the carboxyl groups of EDTA and the headgroups of 12-6-12 leads to the formation of oligomeric-like surfactant EDTA(12-6-12)(2) at an EDTA/12-6-12 molar ratio of 0.50. The critical aggregation concentration of the EDTA(12-6-12)(2) complexes is much lower than that of 12-6-12, and the complexes form loose, large network-like premicellar aggregates and then transfer into small micelles with an increase in concentration. Moreover, the addition of CaBr2 induces the transition from the loose aggregates and micelles to vesicles owing to the coordination interaction between the calcium ion and EDTA and the electrostatic interaction between EDTA and 12-6-12. The work reveals that as a bridging molecule between the calcium ion and the gemini surfactant, the chelating molecule greatly promotes the assembly of the gemini surfactant and strengthens the molecular packing in the presence of calcium ions. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/39132]  |
| 专题 | 化学研究所_胶体、界面与化学热力学实验室 |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Colloid Interface & Chem Thermodynam, Beijing 100190, Peoples R China 2.Chinese Acad Sci, State Key Lab Struct Chem Unstable & Stable Speci, BNLMS, CAS Res Educ Ctr Excellence Mol Sci,Inst Chem, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Peking Univ, BNLMS, Coll Chem & Mol Engn, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Weiwei,Song, Kai,Chen, Yao,et al. Aggregation of a Cationic Gemini Surfactant with a Chelating Molecule and Effects from Calcium Ions[J]. LANGMUIR,2017,33(44):12719-12728. |
| APA | Zhao, Weiwei.,Song, Kai.,Chen, Yao.,Wang, Hua.,Liu, Zhang.,...&Wang, Yilin.(2017).Aggregation of a Cationic Gemini Surfactant with a Chelating Molecule and Effects from Calcium Ions.LANGMUIR,33(44),12719-12728. |
| MLA | Zhao, Weiwei,et al."Aggregation of a Cationic Gemini Surfactant with a Chelating Molecule and Effects from Calcium Ions".LANGMUIR 33.44(2017):12719-12728. |
入库方式： OAI收割
来源：化学研究所
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