Dissolution of Soap Scum by Surfactant Part I: Effects of Chelant and Type of Soap Scum
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- 作者：Sawwalak Itsadanont (1)
John F. Scamehorn (2)
Sukhwan Soontravanich (2)
David A. Sabatini (2)
Sumaeth Chavadej (1) (3) - 关键词：Anionic surfactants ; Application of surfactants ; Non ; ionic surfactants ; Soap scum
- 刊名：Journal of Surfactants and Detergents
- 出版年：2014
- 出版时间：September 2014
- 年：2014
- 卷：17
- 期：5
- 页码：849-857
- 全文大小：1,075 KB
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John F. Scamehorn (2)
Sukhwan Soontravanich (2)
David A. Sabatini (2)
Sumaeth Chavadej (1) (3)
1. The Petroleum and Petrochemical College, Chulalongkorn University, 254 Soi Chulalongkorn12, Phayathai Rd., Wangmai, Patumwan, Bangkok, 10330, Thailand
2. Institute for Applied Surfactant Research, University of Oklahoma, Norman, OK, USA
3. Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok, Thailand - ISSN：1558-9293
文摘
The equilibrium solubilities of two model soap scums [calcium stearate and magnesium stearate: Ca(C18)2 and Mg(C18)2] were measured in aqueous solutions containing three different types of surfactants: methyl ester sulfonate (MES) as an anionic; alcohol ethoxylate (EO9) as a nonionic; and dimethyldodecylamine oxide (DDAO) as an amphoteric with and without a chelating agent [disodium ethylenediaminetetraacetate (Na2EDTA)]. The solubility of calcium soap scum was generally higher than that of magnesium soap scum, the exception being some DDAO systems. The use of the DDAO surfactant with the Na2EDTA chelating agent at high pH gives the highest solubilities of both studied soap scums. The soap scum solubility is on the order of 2,000 times that in water at high pH. The DDAO is the most effective surfactant under all conditions. The MES is more effective than the EO9 at low pH with the opposite trend observed at high pH. The synergism from added chelant is generally greater at higher pH and is greatest for DDAO followed by EO9.