CO2-responsive O/W microemulsions prepared using a switchable superamphiphile assembled by electrostatic interactions

Chen, Xiangyu1; Ma, Xinrui1; Yan, Ci1; Sun, Dejun2; Yeung, Tony1; Xu, Zhenghe1,3

2019-01-15

10.1016/j.jcis.2018.09.029

JOURNAL OF COLLOID AND INTERFACE SCIENCE   影响因子和分区

0021-9797

1095-7103

A CO2-responsive superamphiphile was designed to form switchable O/W microemulsions of rapid switching responses. The linear structured superamphiphile was assembled via electrostatic interactions between anionic oleic acid and cationic Jeffamine D-230 at a mole ratio of 1:1. Addition of the CO2-responsive superamphiphile and 1-butanol as a co-surfactant led to the spontaneous formation of stable heptane-in-water microemulsions. Treating this stable microemulsion with CO2 for 20 s caused dissociation of the superamphiphile into interfacial inactive components, leading to a complete phase separation of the microemulsion into immiscible oil and water phases. Removing the CO2 from the system by N-2 sparging at 60 degrees C for 10 min converted the phase-separated system into a transparent microemulsion as a result of the in situ formation of the superamphiphile. Compared with the results from previous studies, the O/W microemulsion formed using the current superamphiphile with the co-addition of 1-butanol featured not only a unique thermodynamical stability of nano-sized droplets, but also a desired response to CO2 to achieve a rapid and complete phase separation, and remicroemulsification as desired with N-2 sparging, making this CO2-responsive O/W microemulsion a promising candidate for applications such as nanomaterial synthesis, enhanced oil recovery and soil remediation. (C) 2018 Published by Elsevier Inc.

Rapid switchable O/W microemulsion CO2-responsive superamphiphile Complete oil-water phase separation

SCI ; EI

英语

通讯

National Natural Science Foundation of China[21333005]

Chemistry

Chemistry, Physical

WOS:000449235600062

ACADEMIC PRESS INC ELSEVIER SCIENCE

20183905868215

Carbon dioxide ; Electrostatics ; Emulsification ; Enhanced recovery ; Phase separation ; Soil conservation ; Soil pollution ; Water treatment

Water Treatment Techniques:445.1 ; Soils and Soil Mechanics:483.1 ; Oil Field Production Operations:511.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2

CHEMISTRY

Web of Science

1.Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada
2.Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Shandong, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Chen, Xiangyu,Ma, Xinrui,Yan, Ci,et al. CO2-responsive O/W microemulsions prepared using a switchable superamphiphile assembled by electrostatic interactions[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2019,534:595-604.

Chen, Xiangyu,Ma, Xinrui,Yan, Ci,Sun, Dejun,Yeung, Tony,&Xu, Zhenghe.(2019).CO2-responsive O/W microemulsions prepared using a switchable superamphiphile assembled by electrostatic interactions.JOURNAL OF COLLOID AND INTERFACE SCIENCE,534,595-604.

Chen, Xiangyu,et al."CO2-responsive O/W microemulsions prepared using a switchable superamphiphile assembled by electrostatic interactions".JOURNAL OF COLLOID AND INTERFACE SCIENCE 534(2019):595-604.