ICCAS OpenIR
Salt effect on the complex formation between cationic gemini surfactant and anionic polyelectrolyte in aqueous solution
Wang, XY; Wang, JB; Wang, YL; Yan, H
2004-10-12
Source PublicationLANGMUIR
ISSN0743-7463
Volume20Issue:21Pages:9014-9018
AbstractSalt effect on the interaction of anionic polyelectrolyte sodium carboxymethylcellulose (NaCMC) with cationic gemini surfactant hexamethylene-1,6-bis(dodecyldimethylammonium bromide) [C12H25(CH3)(2)N(CH2)(6)N(CH3)(2)C12H25]Br-2 (C12C6C12Br2) has been investigated using turbidimetric titration, steady-state fluorescence, and mobility measurement. It is found that the critical aggregation concentration(cac) for C12C6C12Br2/NaCMC complexes depends little on addition of sodium bromide (NaBr). However, in the presence of nonionic surfactant Triton X-100 (TX100), the critical ionic surfactant mole fraction for the onset of complex formation (Y-c) increases markedly with increasing NaBr concentration. These salt effects are supposed as the overall result from competition between the increase of interaction and the screening of interaction. The increase of interaction is referred to as the effect that the larger micelle with higher surface charge density induced by salt has a stronger interaction with oppositely charged polyelectrolyte. The screening of interaction is referred to as the salt screening of electrostatic attraction between the polymer chain and the surfactant. For complex formation between C12C6C12Br2 and NaCMC, the increase of interaction probably compensates the screening of interaction leading to constant cac values at different salt concentrations. For complex formation between the C12C6C12Br2/TX100 mixed micelle and NaCMC, the screening of interaction probably plays a dominant role, leading to higher suppression of electrostatic binding of micelles to polyelectrolyte.
DOI10.1021/la.048856v
Indexed BySCI
Language英语
WOS IDWOS:000224391600013
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:45[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82040
Collection中国科学院化学研究所
Corresponding AuthorWang, YL
AffiliationChinese Acad Sci, Inst Chem, Key Lab Colloid & Interface Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wang, XY,Wang, JB,Wang, YL,et al. Salt effect on the complex formation between cationic gemini surfactant and anionic polyelectrolyte in aqueous solution[J]. LANGMUIR,2004,20(21):9014-9018.
APA Wang, XY,Wang, JB,Wang, YL,&Yan, H.(2004).Salt effect on the complex formation between cationic gemini surfactant and anionic polyelectrolyte in aqueous solution.LANGMUIR,20(21),9014-9018.
MLA Wang, XY,et al."Salt effect on the complex formation between cationic gemini surfactant and anionic polyelectrolyte in aqueous solution".LANGMUIR 20.21(2004):9014-9018.
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