A study on the swelling behavior of poly(acrylic acid) hydrogels obtained by electron beam crosslinking

作者：Sheikh N^*; Jalili L; Anvari F

来源：Radiation Physics and Chemistry, 2010, 79(6): 735-739.

DOI：10.1016/j.radphyschem.2009.12.013

• Swelling behavior
• EB-crosslinking
• Hydrogel
• Poly(acrylic acid)
• pH-sensitive
• Diffusion mode

Poly(acrylic acid) (PAA) hydrogels were prepared by using electron beam (EB) crosslinking of PAA homopolymer from its aqueous solutions. The swelling behavior of the hydrogels was studied as a function of the concentration of PAA solution, radiation dose, pH of the swelling medium and swelling time. Also the environmental pH effect on the water diffusion mode into hydrogels was investigated. These hydrogels clearly showed pH-sensitive swelling behavior with Fickian type of diffusion in the stomach-like pH medium (pH 1.3) and non-Fickian type in the intestine-like pH medium (pH 6.8).

• 出版日期2010-6