Preparation of pH Sensitive Polyacrylic Acid(PAAc) Macroporous Hydrogels in Aqueous NaCl Solutions and their Characterization

Abstract:

In this study, macroporous, pH sensitive polyacrylic acid hydrogels were prepared by using different concentration of aqueous NaCl solutions as the polymerization medium. The optical photos showed that the pore morphologies of the hydrogels were dependent on the concentration of NaCl. Swelling studies showed an increase in equilibrium swelling ratio as the NaCl concentration in the polymerization medium increased from 0 to 0.7mol/L. The hydrogels exhibited stronger sensitivity to pH changes, and showed much faster reswelling and deswelling response rates with the NaCl concentration increasing in the polymerization medium.

• Periodical: Advanced Materials Research (Volumes 79-82)
• Pages: 1999-2002
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.79-82.1999
• Online since: August 2009
• Authors: Yu Hua Xue, Wen Yuan Zhao, Shou Feng Sun, Hu Yu
• Keywords: Aqueous NaCl Solutions, Macroporous, pH Senstitive, Polyacrylic Acid, Swelling Ratio

References

[1] YuXi Zhang, FeiPeng Wu, MiaoZhen Li, et al.: Polymer 46 (2005) 7695-7700.

[2] Fei Jianqi, Gu Lixia: European Polymer Journal 38 (2002) 1653-1658.

[3] Y.C. Nho, S.E. Park, H. Il. Kim, et al.: Nucl. Instr. and Meth. in Phys. Res. B 236 (2005) 283-288.

[4] A. Pourjavadi, Sh. Barzegar, F. Zeidabadi: Reactive & Functional Polymers 67 (2007) 644-654.

[5] G. Gerlach, M. Guenther, J. Sorber, et al.: Sensors and Actuators B 111-112 (2005) 555-561.

[6] H. Omidiana, J.G. Roccaa, K. Park: Journal of Controlled Release 102 (2005) 3-12.

[7] Qing Liu, Elizabeth L. Hedberg, Zewen Liu, et al.: Biomaterials 21 (2000) 2163-2169.

[8] H. Liu, F. Bian, M. Liu, et al.: Journal of Applied Polymer Science, Vol. 109, 3037-3043 (2008).

[9] Y. Ling, M. Lu: J. Polym. Res. 16(2009) 29-37.

[10] Ying Zhao, Haijia Su, Li Fang, et al.: Polymer 46 (2005) 5368-5376.