Interaction of Anionic Polyacrylamide with Cationic Surfactants†

doi:10.7503/cjcu20140823

Abstract

Abstract:

It is noteworthy that the hydrophobically associating acrylamide copolymer is a new class of water-soluble polymers, derived from polyacrylamide by introducing a relatively low amount of hydrophobic groups(generally less than 5%, molar fraction) in polymer hydrophilic macromolecule chains. Because of special pro-perties of temperature resistance, salt tolerance, resistance to shear and storage stability, the material has been widely used in industry. The water-soluble negatively charged polyacrylamide was prepared by free radical copolymerization method. The interaction between cationic surfactants and polyacrylamide was researched in aqueous solution and NaCl solution including solubility, viscosity and rheological properties.

Key words: Polyacrylamide, Cationic surfactant, Oil displacement

CLC Number:

O632.63

TrendMD:

CAO Xulong, HU Yue, SONG Xinwang, ZHU Yangwen, HAN Yugui, WANG Kunpeng, GUO Dongsheng, LIU Yu. Interaction of Anionic Polyacrylamide with Cationic Surfactants^†[J]. Chem. J. Chinese Universities, 2015, 36(2): 395.

Figures/Tables 6

Fig.1 Structure of APAM

Table 1 Solubilities of cationic surfactants in the APAM solution under different conditions*

Cationic surfactant	DDBAC	DTAC	CTMAB	OTA	LDEA
S₁/(mg·mL^-1)	0.3	0.5	0.05	0.2	0.2
S₂/(mg·mL^-1)	0.5	0.5	0.8	2	0.5

Fig.2 Effect of shear rate on the apparent viscosity of APAM(2 mg/mL) with surfactant(0.2 mg/mL) in aqueous solution at 45 ℃

Fig.3 Recovery of viscosity of aqueous solution of APAM(2 mg/mL) with surfactant(0.2 mg/mL) after shearing for 2 min at 45 ℃

Fig.4 Effect of shear rate on the apparent viscosity of APAM(2 mg/mL) with surfactant(0.2 mg/mL) in 1 mol/L NaCl solution at 45 ℃

Fig.5 Recovery of viscosity of 1 mol/L NaCl solution of APAM(2 mg/mL) with surfactant(0.2 mg/mL) after shearing for 2 min at 45 ℃

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