TY - JOUR
T1 - Rheological behavior of PAA - CnTAB complex
T2 - Influence of PAA charge density and surfactant tail length in PAA semidilute aqueous solution
AU - Wu, Qiang
AU - Du, Miao
AU - Ye, Tao
AU - Shangguan, Yong Gang
AU - Zhou, Jian Ping
AU - Zheng, Qiang
PY - 2009/8
Y1 - 2009/8
N2 - Interactions between anionic polyelectrolyte, poly(acrylic acid) (PAA), and cationic surfactant, alkyltrimethylammonium bromide (Cn TAB), were investigated by rheological measurements in semidilute PAA solution. The dependences of the rheological behavior on the chain length of the surfactant, PAA neutralization degree, and temperature were discussed. The results revealed that both dodecyl and cetyltrimethylammonium bromides (C12TAB and C16 TAB) could increase the viscosity of PAA solution when the surfactant amounts surpassed a critical surfactant concentration (Cc), and Cc of C16TAB was lower than that of C12TAB at same PAA neutralization degree. The increase of viscosity is attributed to the surfactant micelles bridging of the polymer chains and confine the mobility PAA chain. On the other hand, it is found that the hydrogen bonding also played an important role in the PAA - CnTAB system, especially in lower neutralization degree PAA solution, which results in the viscosity increase rapidly with the added surfactant into lower neutralization degree PAA solution.
AB - Interactions between anionic polyelectrolyte, poly(acrylic acid) (PAA), and cationic surfactant, alkyltrimethylammonium bromide (Cn TAB), were investigated by rheological measurements in semidilute PAA solution. The dependences of the rheological behavior on the chain length of the surfactant, PAA neutralization degree, and temperature were discussed. The results revealed that both dodecyl and cetyltrimethylammonium bromides (C12TAB and C16 TAB) could increase the viscosity of PAA solution when the surfactant amounts surpassed a critical surfactant concentration (Cc), and Cc of C16TAB was lower than that of C12TAB at same PAA neutralization degree. The increase of viscosity is attributed to the surfactant micelles bridging of the polymer chains and confine the mobility PAA chain. On the other hand, it is found that the hydrogen bonding also played an important role in the PAA - CnTAB system, especially in lower neutralization degree PAA solution, which results in the viscosity increase rapidly with the added surfactant into lower neutralization degree PAA solution.
KW - Hydrogen bonding
KW - Micelle
KW - Polyelectrolyte
KW - Surfactant
KW - Viscosity
UR - http://www.scopus.com/inward/record.url?scp=67650617723&partnerID=8YFLogxK
U2 - 10.1007/s00396-009-2045-9
DO - 10.1007/s00396-009-2045-9
M3 - 文章
AN - SCOPUS:67650617723
SN - 0303-402X
VL - 287
SP - 911
EP - 918
JO - Colloid and Polymer Science
JF - Colloid and Polymer Science
IS - 8
ER -