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Journal of Dispersion Science and Technology Volume 28, 2007 - Issue 1: Commemorate Professor Per Ekwall—The Pioneer in Colloid Chemistry
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Original Articles

Study on the Dynamic Surface Tension of Nonionic Surfactant LS45 and LS54 Solutions

Yan'an Gao Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, China
,
Suqing Wang Chemistry and Chemical Engineer Department, Weifang University, Weifang, China
,
Liqiang Zheng Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, ChinaCorrespondence[email protected]
,
Ganzuo Li Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, China
,
Wanguo Hou Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, China
,
Xuan Zhang Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, China
,
Deming Lu Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, China
,
Shaohua Zhang Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, China
,
Gaoyong Zhang Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, China
&
Qiliang Huang Key Laboratory of Pesticide Chemistry and Application Technology, Institute for Plant Protection CAAS, Beijing, China
 show all
Pages 181-187 | Received 15 Dec 2005, Accepted 13 Jan 2006, Published online: 06 Feb 2007
 
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Abstract

The dynamic surface tension (DST) of nonionic surfactants Dodecyl Polyoxyethylene(4) Polyoxypropylene(5) Ether (C12H25O(EO)4(PO)5H, abbr LS45) and Dodecyl Polyoxyethylene(5) Polyoxypropylene(4) Ether (C12H25O(EO)5(PO)4H, abbr LS54), which are short chain polyether surfactants, was measured using the maximum bubble pressure method. The effects of concentration and temperature on DST were investigated systematically, and the parameters (n, t i , t∗, t m , γ m , γ 0−γ m , R 1/2) derived from the DST curves were calculated, and the systematic change of the DST parameters with concentration and temperature is discussed. The parameters (p C 20(1S), Δp C 20, C 1s(i)∗ and C 1s (m)∗) of LS54 at 1 second were also measured and the physical meanings of these parameters were analyzed.

The authors are grateful to the National Natural Science Foundation of China (No.50472069; No.30370945), the Ministry of Science and Technology of China (2003CCA02900), and the Foundation of Guizhou (No, 2001‐6).

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