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Guangzhou Scikoon Industry Ltd. Co.
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2024 Technical Program

Surfactants and Detergents

Session: Home & Fabric Care I

Sustainable anionic surfactant bio-based Internal Olefin Sulfonate and its keys to achieve both higher surface activity and superior water solubility

Monday, April 29, 2024
2:26 PM – 2:43 PM EDT
Room: 519a
Abstract:

The development of sustainable surfactants is essential to supply detergents to people all over the world. Currently, most surfactants used in detergents are derived from C12/14 residue, so only 5 % of the whole vegetable oil can be used for such purpose. Therefore, we tried to use C16/18 residue, which are found in many vegetable oils to expand the option of the resources, and developed bio-based internal olefin sulfonate, bio-based IOS.

Surprisingly, bio-based IOS exhibits significantly lower krafft point and critical micelle concentration, which are difficult to achieve with conventional surfactants. Therefore, we expect that bio-based IOS is one of the sustainable surfactants with global usability and higher performance with smaller amounts. To understand the reason why bio-based IOS can satisfy with both excellent water solubility and superior surface activity, we conducted 1H-NMR and FT-IR analysis to investigate the molecular conformation of bio-based IOS in water. The results revealed that the two different lengths of alkyl chains of bio-based IOS are aligned in the same direction, and intramolecular hydrogen bonds occur between the sulfo and hydroxy groups. This unique molecular structure inhibits insolubility in water, allowing bio-based IOS to maintain high surface activity and excellent water solubility.

In addition, we will also discuss its application in laundry detergents.