• Title/Summary/Keyword: Korea Environment Institute

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Characterization of Poly(acrylic acid) Hydrogel Containing Zinc Oxide Particle Prepared by Radiation (방사선을 이용하여 제조한 zinc oxide 입자 함유 poly(acrylic acid) 하이드로젤의 특성)

  • Park, Jong-Seok;Jeong, Sung-In;Shin, Young Min;Choi, Jong-Bae;Gwon, Hui-Jeong;Lim, Youn-Mook;Jeun, Joon-Pyo;Kim, Hyin-Bin;Oh, Seung-Hwan;Kang, Phil Hyun;Nho, Young-Chang
    • Journal of Radiation Industry
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    • v.6 no.2
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    • pp.153-158
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    • 2012

  • In this research, poly(acrylic acid) (PAAc) hydrogels containing zinc oxide particle were prepared by gamma-ray irradiation. PAAc powder was completely dissolved in distilled water at room temperature. Water-insoluble zinc oxide powder were added into the PAAc solution and stirred until totally dissolved. Finally, the mixture was irradiated by gamma-ray irradiation to make crosslinking. The effects of various parameters such as zinc ions' concentration, irradiation doses were varied and investigated in detail. PAAc hydrogels containing zinc oxide particle were characterized by gel content and swelling ratio. Moreover, the antibacterial properties of this material were evaluated by paper diffusion test against the Gram positive and Gram negative bacteria.

Hydrogen Bonding Effect on γ-Ray Irradiated Poly(vinyl alcohol) Hydrogels in Different Drying Conditions

  • Gwon, Hui-Jeong;Jo, Sun Young;Park, Eun Ji;Shin, Young Min;Choi, Jong-Bae;Park, Jong-Seok;Lim, Youn-Mook;Nho, Young-Chang;Kang, Phil Hyun
    • Journal of Radiation Industry
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    • v.6 no.1
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    • pp.89-94
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    • 2012

  • Three-dimensional network hydrogels were prepared by ${\gamma}$-irradiation of aqueous solutions of poly(vinyl alcohol) (PVA) and glycerol (Gly). Oven-drying was used to measure the gel fraction (G), hydration (H) or swelling behavior (S) of the prepared hydrogels. This study made a hypothesis that hydrogen bonds due to addition of glycerol and change of dry states such as freeze-drying (FD), room-drying (RD) and oven-drying (OD) acts on the G, H, and S. Interesting results on the hydrogen bonding effect in the prepared hydrogels are monitored at different drying conditions. The FD samples have a higher G values with increase in glycerol content as compared with the OD and RD samples. The formation of strong hydrogen bonding network among Gly molecules and hydrogel matrix was considered as the main driving force, resulting in the changes in the G, H, and S of the hydrogels under different drying conditions.