Radiation synthesis and characterization of polyacrylic acid hydrogels

LOW ENERGY ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS

Radiation synthesis and characterization of polyacrylic acid hydrogels

YANG Mingcheng，

SONG Hongyan，

ZHU Chengshen，

HE Suqin

Nuclear Science and Techniques

Vol.18, No.2

pp.82-85

Published in print 20 Apr 2007

DOI：10.1016/S1001-8042(07)60024-4

CLC：O644,O631

30700

The pH-sensitive polyacrylic acid (PAA) hydrogels were synthesized by gamma-ray irradiation at an ambient temperature. The influences of dose, monomer concentration, cross-linking agent content, pH, and ionic strength on the swelling ratio (SR) of the PAA hydrogels were investigated in detail. The results show that the SR of the hydrogel decreases with an increase in the dose, monomer concentration, and cross-linking agent content. In alkaline solution, the SR of the hydrogels is much higher than that in acid solution. Also, the ionic strength can influence the SR of the hydrogels. The more the concentration, the lower the SR.

pH-sensitive behaviorPolyacrylic acid hydrogelsRadiation synthesis

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