Spectrophotometric determination of cloud point of Brij 35 nonionic surfactant
Küçük Resim Yok
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The cloud point of nonionic surfactant polyoxyethylene (23) lauryl ether (Brij-35) was determined in the presence of various inorganic electrolytes. The measurements of cloud point (CP) were carried out with UV-vis spectrophotometer instead of visual observation. CP of Brij-35 could not be measured directly because its CP is more than 100 degrees C. Therefore, CP values of Brij-35 were lowered by the addition of electrolytes. In this study, NaF, NaCl, NaBr, KNO3, K2CO3, K-3 PO4, Li2SO4, Na2SO4, K2SO4,(NH4)(2)SO4, CuSO4, ZnSO4, CoSO4 were used as electrolytes. Linear lines which were drawn with CP values were extrapolated to zero electrolyte concentration. The real CP value of Brij-35 which is merely listed as > 100 degrees C in the literature was found as 118.5 +/- 0.5 degrees C for all samples. Furthermore, the effects of the nature of the cation and the anion and the valencies of the cations on CP were reported and the rate of decrease in CP with concentration is discussed. (C) 2011 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Cloud Point, Spectrophotometric Determination, Nonionic Surfactant, Micellar Growth, Inorganic Additives, Anionic Surfactants, Organic Additives, Aqueous-Solutions, Dodecyl-Sulfate, Triton X-100, Behavior, Micelles, Mixtures, Bromide
Kaynak
Fluid Phase Equilibria
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
303
Sayı
1
