Metal ion adsorbability of electrospun wool keratose/silk fibroin blend nanofiber mats |
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| Authors: | Doo Hyun Baek Chang Seok Ki In Chul Um Young Hwan Park |
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| Institution: | (1) Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, 151-742 Seoul, Korea;(2) Department of Natural Fiber Sciences, Kyungpook National University, 702-701 Daegu, Korea;(3) Research Institute for Agriculture and Life Science, Seoul National University, 151-742 Seoul, Korea |
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| Abstract: | In this study, electrospun wool keratose (WK)/silk fibroin (SF) blend nanofiber was prepared and evaluated as a heavy metal
ion adsorbent which can be used in water purification field. The WK, which was a soluble fraction of oxidized wool keratin
fiber, was blended with SF in formic acid. The electrospinnability was greatly improved with an increase of SF content. The
structure and properties of WK/SF blend nanofibers were investigated by SEM, FTIR, DMTA and tensile test. Among various WK/SF
blend ratios, 50/50 blend nanofiber showed an excellent mechanical property. It might be due to some physical interaction
between SF and WK molecules although FTIR result did not show any evidence of molecular miscibility. As a result of metal
ion adsorption test, WK/SF blend nanofiber mats exhibited high Cu2+ adsorption capacity compared with ordinary wool sliver at pH 8.5. It might be due to large specific surface area of nanofiber
mat as well as numerous functional groups of WK. Consequently, the WK/SF blend nanofiber mats can be a promising candidate
as metal ion adsorption filter. |
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| Keywords: | Wool keratose Silk fibroin Nanofiber Metal ion Adsorption |
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