Characterization and Property of Sulfonated Polyacrylamide/triethanolamine Supramolecular System†

doi:10.7503/cjcu20160274

Abstract

Abstract:

Polymer flooding technology is one of the preferred “enhanced oil recovery”(EOR) technologies used for improving oil recovery. Among the various chemical reagents for polymer flooding technology, polyacrylamide has attracted more and more attention. To explore the improving effect of triethanolamine(TEA) on sulfonated polyacrylamide(SPAM), the interaction of negatively charged sulfonated polyacrylamide with triethanolamine and the structure of SPAM/TEA supramolecular system were investigated in aqueous solution and mineralized water by means of transmission electron microscopy(TEM), viscosity, dynamic light scattering(DLS), zeta potential and rheological experiments. The results indicate that, through the cooperative contribution of electrostatic and hydrogen bond interactions, SPAM and TEA can form a large supramolecular assembly with an average diameter of 780 nm measured by DLS. Significantly, the formation of SPAM/TEA supramolecular system can efficiently improve the viscosity and rheological properties of sulfonated polyacrylamide. In addition, the nearly neutral zeta potential of SPAM/TEA supramolecular system can decrease the affect of Ca²⁺ and Mg²⁺ cations in the mineralized water.

Key words: Sulfonated polyacrylamide, Triethanolamine, Supramolecular system

CLC Number:

O632.63

TrendMD:

ZHU Yangwen, LIU Ge, CAO Xulong, SONG Xinwang, CHEN Yong, LIU Yu. Characterization and Property of Sulfonated Polyacrylamide/triethanolamine Supramolecular System^†[J]. Chem. J. Chinese Universities, 2016, 37(9): 1728.

Figures/Tables 8

Fig.1 Structure of SPAM

Fig.2 Effect of TEA concentration on viscosity of SPAM

Fig.3 TEM image of SPAM/TEA supramolecular system

Fig.4 Hydrodynamic radius distribution of SPAM and SPAM/TEA in aqueous solution

Fig.5 Zeta potentials of SPAM(a) and SPAM/TEA(b) in aqueous solution

Fig.6 Effects of TEA concentration on G'(a, c, e, g) and G″(b, d, f, h) of SPAM in aqueous solution at 25 ℃ Concentration of SPAM/(mg·mL-1): a, b. 0.2; c, d. 0.4; e, f. 0.6; g, h. 0.8.

Fig.7 Effects of shear rate on the sheer viscosity of SPAM(a,b) and SPAM/TEA(c,d) in aqueous solution at 25 ℃ a, c. Without a pre-shearing; b, d. after a pre-shea-ring at 200 s-1 for 5 min.

Fig.8 Effects of shear rate on the apparent viscosity of SPAM(a, b) and SPAM/TEA(c, d) in mineralized water solution at 85 ℃ a, c. Without a pre-shearing; b, d. after a pre-shea-ring at 200 s-1 for 5 min.

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