Study on cloud points of Triton X-100-cationic gemini surfactants mixtures: A spectroscopic approach
Küçük Resim Yok
Tarih
2010
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study investigates the effects of various cationic surfactants on the cloud point (CP) of the nonionic surfactant Triton X-100 (TX-100) in aqueous solutions. Instead of visual observation, a spectrophotometer was used for measurement of the cloud point temperatures. The values of CPs for Triton X-100 can be measured directly because TX-100 has an average number of oxyethylene units per molecule of p approximate to 9.5 and a CP = 66.0 degrees C. Quaternary ammonium dimeric surfactants (m-s-m, m = 10, 12, and 16, and s = 2, 6, and 10) were synthesized and used. The melting temperature T-M and the Krafft temperature T-K were measured for 1 wt% aqueous solutions of these synthesized surfactants. The melting temperature of the solid gemini surfactants increased with the carbon number of the alkyl chain. The results showed that additions of the gemini surfactants (which are infinitely miscible with water) to Triton X-100 increased the cloud point of the TX-100 solutions. All salts tested in these studies had a large effect on the CPs of nonionic surfactants due to their effect on water structure and their hydrophilicity. The effect of the alkyl chain length of the gemini surfactant on the CP of Triton X-100 is therefore more important than the spacer chain length. (C) 2009 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Spectrophotometric Determination, Triton X-100, Cloud Point, Cationic Gemini Surfactants, Spacer Length, Alkanediyl-Alpha,Omega-Bis(Dimethylalkylammonium Bromide) Surfactants, Sodium Dodecyl-Sulfate, Nonionic Surfactants, Inorganic Additives, Ionic Surfactants, Chain-Length, Behavior, Water, Micelle, X-100
Kaynak
Spectrochimica Acta Part A-Molecular And Biomolecular Spectroscopy
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
75
Sayı
2
