Development of Nanofibrous Chitosan Membranes for Heavy Metal Ion Removal

• Main Authors: Shin Fan Ciou, 邱仕帆
• Other Authors: D. M. Lee
• Format: Others
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/00228137319529150746

碩士 === 長庚大學 === 機械工程學系 === 101 === We developed biodegradable nanofibrous polylactide/chitosan membranes for the removal of heavy metal ions. Polylactide and chitosan were first separately dissolved intrifluoroacetic acid (TFA). The solutions were then mixed and electrospun into nanofibrous membranes via an electrospinning process. The morphology of as-spun nanofibers was examined by scanning electron microscopy. The average diameter of electrospun nanofibers ranged from 410 nm to 710 nm. The adsorption capability of nanofibrous polylactide/chitosan membranes was measured and compared with that of bulk chitosan. The influence of various process conditions on adsorption efficiency was also examined. The experimental results suggested that the electrospun nanofibrous polylactide/chitosan membranes exhibit good silver ion uptake capabilities. The metal uptake of nanofibrous membranes increased with the initial metal ion concentrations and decreased with the filtering rate of the solutions. Furthermore, the electrospun membrane could be reused after the recovery process. The empirical results in this study suggested that electrospun nanofibrous polylactide/chitosan membranes can be a good candidate for the removal of heavy metal ions.