Preparation and Swelling Behavior of Superporous Hydrogels: Control of Pore Structure and Surface Property

You Mee Choi; Su Jin Im; Sung Woon Myung; Ho Suk Choi; Ki Nam Park; Kang Moo Huh

doi:10.4028/www.scientific.net/KEM.342-343.717

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 342-343Preparation and Swelling Behavior of Superporous...

Preparation and Swelling Behavior of Superporous Hydrogels: Control of Pore Structure and Surface Property

Abstract:

Superporous hydrogels (SPHs) with interconnected pores of several hundreds micrometers were prepared using radical polymerization of acrylic acid (AA) and acrylamide (AAm) in the presence of N,N’-methylenebisacrylamide (BIS). A gas blowing method using bicarbonate as a foaming agent was applied to introduce the porous structure under different pH conditions (pH 2~7). The pore structures of the prepared SPHs were examined by a scanning electron microscope. The SPHs obtained at pHs of 4.5 and 4.75 were observed to have a interconnected pore structure with homogeneous distribution and swell to an equilibrium state within several minutes. The O2 plasma reactor has been used for surface modification of SPHs. The plasma-treated SPHs showed much faster swelling behavior due to the improvement of surface hydrophilicity. The swelling ratio of SPHs was also enhanced by using a wetting agent, such as triacetin and glycerol, during a washing procedure.

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Periodical:

Key Engineering Materials (Volumes 342-343)

Pages:

717-720

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.342-343.717

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Online since:

July 2007

Authors:

You Mee Choi, Su Jin Im, Sung Woon Myung, Ho Suk Choi, Ki Nam Park, Kang Moo Huh

Keywords:

Fast Swelling, Hydrogel, Plasma Treatment, Superporous Structure, Wetting Agents

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