CO2-responsive aliphatic tertiary amine-modified alginate and its application as a switchable surfactant

Carbohydrate Polymers
Jisheng Yang, Hongbiao Dong


A new kind of hexyl diethyl tertiary amine-grafted amphiphilic alginate derivative (HDEA-Alg) was synthesized from (6-bromo-hexyl)-diethyl-amine (BHDEA) and sodium alginate (NaAlg) through esterification. The structure of HDEA-Alg was confirmed by FT-IR and NMR spectroscopies. The grafting ratio was calculated according elemental analysis and thermodynamic property was analyzed by TG. The CO2/N2-responsive performance of HDEA-Alg in aqueous solution was demonstrated by surface tension and conductivity measurements. Stable emulsions of liquid paraffin were easily prepared in the presence of the HDEA-Alg. These emulsions can be de-emulsified by bubbling CO2 through the emulsions at 5°C for 30min, resulting in complete oil/water phase separations. They can be re-emulsified by bubbling N2 through the solutions at 50°C for 30min with the aid of homogenization.


Mar 9, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Sonia MelleGerald G Fuller
Jun 15, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Suhrit GhoshS Thayumanavan
Apr 29, 2008·Chemical Communications : Chem Comm·Miklós CzaunHirotaka Ihara
Dec 30, 2011·Journal of Colloid and Interface Science·Justin O ZoppeOrlando J Rojas
Jul 6, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Hao LiuZhen Tong
Aug 8, 2012·Chemical Society Reviews·Florian D Jochum, Patrick Theato
Dec 12, 2012·Carbohydrate Polymers·Ji Sheng YangWen He
Jun 1, 2013·Macromolecular Rapid Communications·Shaojian Lin, Patrick Theato
Aug 12, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Pingwei LiuShiping Zhu

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