Aggregation in the Mixture of Branched Carboxylate Salts and Sulfonate Surfactants with Different Oligomeric Degrees

doi:10.6023/A18030086

CORC > 化学研究所 > 中国科学院化学研究所

	Aggregation in the Mixture of Branched Carboxylate Salts and Sulfonate Surfactants with Different Oligomeric Degrees
	Li Haofei ; Qiao Fulin ; Fan Yaxun ; Wang Yilin 1
刊名	ACTA CHIMICA SINICA
	2018-07-15
卷号	76 期号:7 页码:564-574
关键词	Star-shaped Oligomeric Surfactant Sans Surface Tension Interaction Aggregate
ISSN号	0567-7351
DOI	10.6023/A18030086
英文摘要	Understanding the effects of molecules with branched structures on surface activities and micellization of star-shaped oligomeric surfactants will promote the applications of oligomeric surfactants. The present work has studied the interactions and aggregation of branched carboxylate 2-hexyldecanoic acid (HDA) and 2,2,4,8,10,10-hexamethylundecane-5-carboxylic acid (HMLCA) with single chain sodium dodecyl sulfonate (SDoS) and star-shaped tetrameric sulfonate surfactant (EDA-(C12SO3Na)(4)) in aqueous solution of pH 11 by surface tension, zeta-Potential and small angle neutron scattering (SANS). Surface tension measurements have shown that the addition of HDA or HMLCA can significantly reduce the surface tension at critical micellar concentration (CMC), meanwhile, the CMC values increase slightly as the mole fraction of HDA or HMLCA increases. The interaction parameter (beta), calculated according to the non-ideal mixed solution model, indicate that different interaction degrees exist between branched carboxylate and sulfonate surfactant on surface activities and micellization. The four mixtures all exhibit synergism in surface tension reduction efficiency. The mixtures of single chain sulfonate surfactant and branched carboxylate also exhibit synergism in micelle formation, whereas the mixtures of tetrameric sulfonate surfactant and branched carboxylate do not, although the attractive interaction of HDA/EDA-(C12SO3Na)(4) and HMLCA/EDA-(C12SO3Na)(4) is stronger than that of HDA/SDoS and HMLCA/SDoS in mixed micelles. Taking HDA as a representative, SANS and zeta-Potential results reveal that the addition of HDA into these two sulfonate surfactants leads to different aggregate transitions in the solution. For HDA/SDoS, when the molar fraction of HDA (X-HDA) is constant and the total surfactant concentration increases, spherical micelles transfer into rod-like micelles. For the HDA/EDA-(C12SO3Na)(4) mixture, the rod-like micelles become shorter as X-HDA increases at a fixed total surfactant concentration, while the rod-like micelles are growing longer with increasing X-HDA at a fixed total surfactant concentration. This observation suggests that the branched structure of carboxylates can improve the aggregation ability of the mixed system. In addition these mixtures show excellent performance at emulsifying dodecane, and HDA or HMLCA can greatly reduce the dosage of sulfonate surfactants.
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000442413500009
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/42319]
专题	中国科学院化学研究所
通讯作者	Wang Yilin
作者单位	1.Chinese Acad Sci, Inst Chem, Key Lab Colloid Interface & Chem Thermodynam, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li Haofei,Qiao Fulin,Fan Yaxun,et al. Aggregation in the Mixture of Branched Carboxylate Salts and Sulfonate Surfactants with Different Oligomeric Degrees[J]. ACTA CHIMICA SINICA,2018,76(7):564-574.
APA	Li Haofei,Qiao Fulin,Fan Yaxun,&Wang Yilin.(2018).Aggregation in the Mixture of Branched Carboxylate Salts and Sulfonate Surfactants with Different Oligomeric Degrees.ACTA CHIMICA SINICA,76(7),564-574.
MLA	Li Haofei,et al."Aggregation in the Mixture of Branched Carboxylate Salts and Sulfonate Surfactants with Different Oligomeric Degrees".ACTA CHIMICA SINICA 76.7(2018):564-574.