Physicochemical Properties of Novel Phosphobetaine Zwitterionic Surfactants and Mixed Systems with an Anionic Surfactant |
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Authors: | Lanping Nong Chengliang Xiao Zhensheng Zhong |
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Affiliation: | (1) College of Chemistry and Life Science, Maoming University, 139 Guandu Road, 525000 Maoming, People’s Republic of China;(2) Department of Chemical and Biochemical Engineering, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s Republic of China;(3) Department of Applied Chemistry, South China University of Technology, 381 Wushan Road, 510640 Guangzhou, People’s Republic of China; |
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Abstract: | A series of novel zwitterionic phosphobetaine (PPBT) surfactants were synthesized using long chain fatty alcohol, epichlorohydrin,
dimethylamine and sodium dihydrogen phosphate as raw materials. The physicochemical properties of the phosphobetaine surfactants
such as isoelectric point, foaming, surface tension, critical micelle concentration (CMC) and Krafft point were measured.
Low CMC and surface tension values indicated the surface activities of the phosphobetaine surfactants were quite excellent.
The CMC and surface tension values of PPBT/SDS mixed systems were determined. It was found both of CMC and surface tension
values decreased compared with single surfactant system because of the association between dodecyl sulfate anions and cationic
groups in phosphobetaine by electrostatic attraction. |
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