The Investigation of Polymer Coated Magnetic Nanocomposites for the Immobilization of Carbonic Anhydrase for CO2 Capture

     Polymer coated iron oxide (Fe₃O₄) such as poly vinyl alcohol (PVA) coated Fe₃O₄ nanocomposites and β-Cyclodextrin (β-CD) coated Fe₃O₄ spherical aggregates have been investigated. We have studied each material for the immobilization of carbonic anhydrase (CA) for CO₂ capture applications. CA-PVA-Fe₃O₄ was prepared by enzyme encapsulation, in which CA was embedded into PVA-Fe₃O₄ matrix. Fe₃O₄, PVA-Fe₃O₄, and CA-PVA-Fe₃O₄ were characterized with FT-IR, TEM, SEM, DSC, DLS, and zeta-potential, which confirmed the surface interactions, enzyme immobilization, colloidal stability, and enzyme activity. β-CD-Fe₃O₄ was fabricated with two surfactants, β-CD and polyethylene glycol nonylphenyl ether (NP³⁰). The products were studied by SEM, TEM, DLS and zeta-potential measurement.