Tuesday, October 18, 2011
Exhibit Hall B (Minneapolis Convention Center)
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.