Preparation and Properties of New Ester‐Linked Cleavable Gemini Surfactants

Abstract

We have prepared a series of novel gemini surfactants having ester bonds in their structures. These surfactants possess two identical hydrophilic polyethylene glycol moieties, two hydrophobic alkyl group moieties, and an anionic spacer. The structures of these compounds were confirmed through infrared and nuclear magnetic resonance spectroscopic and elemental analyses. The novel gemini surfactants exhibit excellent surface activity in terms of their surface tension, low-foaming, wetting power, and fluorescence properties. The presence of the ester linkages made these structures cleavable surfactants.

Synthesis and Surface Properties of Anionic Gemini Surfactants having N‐acylamide and Carboxylate Groups

“…Besides, they have better wetting, solubilizing and foaming properties, and good mildness to the skin, safe ecology, and environmental control [5,6]. These unique properties make them potentially useful in many applications, for example, in soil remediation, enhanced oil recovery, drug entrapment and release, and the construction of high-porosity materials [7][8][9][10].…”

Environment-friendly ester bonded gemini surfactant: Mixed micellization of 14-E2-14 with ionic and nonionic conventional surfactants

“…Cationic 14-E2-14 was found to undergo chemical hydrolysis in alkaline condition and thus was cleaved through chemical means by using phosphatebuffered saline and sodium hydroxide/potassium hydrogen phosphate (Ringer Buffer) [21].…”

“…Cleavable/biodegradable gemini surfactants are the better alternatives. With this view point, a number of surfactants with polar or labile bonds (amide, carbonate, ethoxylated, fluorinated and ester containing) which are highly soluble, easily hydrolysable, less stable and degradable, have, therefore, been synthesized by many workers [17][18][19][20][21]. As the nature of spacer and the constituent groups play a significant role in the micellization process of the gemini surfactants, the abovementioned surfactants show interesting properties.…”

Synthesis and Surface Properties of a Novel Anionic Gemini Surfactant using Dioxaoctane as a Linking Group

“…They are used as emulsifiers, bactericidal agents, dispersants, antifoaming agents, detergents, etc. (Hu et al, ; Kuo, Lin, Dong, Chang, & Chen, ; Song & Rosen, ; Sun, Feng, Dong, Chen, & Han, ; Yoshimura & Esumi, ; Zhang et al, ).…”