Comparative study of transformation of micellar structures ezhibited by CTAB and TTAB in binary systems by positron lifetime spectroscopy
The cationic surfactants of general formula RN(CH3)3 X, where R is an Alkyl chain and X is an anion, have interesting properties. They are among the most widely used bacteriocides, wetting and antistatic agents. The physiochemical properties of these surfactants are largely determined by the nature of counter ion and alkyl chain length. The micellar structures of cetyl tri methyl ammonium bromide (CTAB) and its other homologue have been investigated employing several conventional techniques. However, due to relative insensitive and perturbation introduced by the probe, in some of the techniques, the molecular level information in these systems is rather scarce. Similarly detailed structures of the aggregates in so called single phase regions are far from being completely understood. In order to get better information about the micellar structures and understanding of their systematic, positron has also been employed as a non -destructive probe for the comparative studies of transformations of micellar structures exhibited by CTAB and TTAB in aqueous and non aqueous binary systems. The system was investigated in wide range of surfactant concentrations by positron lifetime spectroscopy. Results obtained in these investigations are discussed in this paper.
Surfactant micelles positron positronium positron lifetime phase Transformations
R.Yadav K.Chandra Mani Singh S.R.Choudhary P.H.Khani P.C.Jain
Department of physics ,R.K.College Madhubani (L.N.Mithila University) Bihar India 847211 Sri Venkateshwar College,University Of Delhi,Delhi India Department of Physics & Astrophysics,University Of Delhi India Department of physics,Faculty of science,IHU,Tehran,Iran
国际会议
第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)
武汉
英文
106
2008-05-11（万方平台首次上网日期，不代表论文的发表时间）