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Preparation of poly(vinyl alcohol)/silver-zeolite composite hydrogels by UV-irradiation |
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| Authors: | Min Jae Kim Tae Hwan Oh Sung Soo Han Sang Woo Joo Han Yong Jeon Dong Wook Chang |
| Institution: | 5. Korea Textile Development Institute, Daegu, 703-712, Korea 1. Department of Nano, Medical & Polymer Materials, Yeungnam University, Gyeongsan, 712-749, Korea 2. School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Korea 3. Division of Nano-Systems Engineering, Inha University, Incheon, 402-751, Korea 4. Department of Chemical Systematic Engineering, Catholic University of Daegu, Gyeongsan, 712-702, Korea |
| Abstract: | Poly(vinyl alcohol) (PVA)/Ag-zeolite nanocomposite hydrogels were prepared by UV irradiation using PVA solution mixed with Ag-zeolite nanoparticles. Physical properties and changes in morphology of the PVA/Ag-zeolite hydrogels were investigated. The PVA/Ag-zeolite hydrogels were prepared at a PVA concentration of 9 wt% with a UV irradiation distance of 15 cm, where gel fraction and swelling ratio were optimized. Hardness of the PVA/Ag-zeolite hydrogels decreased with increasing amounts of Ag-zeolite, reaching that of soft elastomer when the amount of Ag-zeolite was 5 % by weight. The PVA/Ag-zeolite hydrogels showed strong antimicrobial activities against Staphylococcus aureus and Klebsiella pneumoniae, inducing a reduction of bacteria of over 99.9 % at a Ag-zeolite content of 3 wt%. |
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