Monday, May 19, 2008
Student Union Building, Upper (Queensborough Community College)
322

Design and Synthesis of Nanotube Bound Biocompatible Hydrogels

Evan M. Smoak and Ipsita A. Banerjee. Fordham University, Bronx, NY

In this work, peptide nanotubes have been used as templates for the growth of poly(ethylene glycol) diacrylate based hydrogels via photopolymerization. The nanotubes were covalently bound to specific dyes before the start of the photopolymerization process. In some cases, albumin was bound to the nanotube bound dyes before irradiation with visible light. When PEG is cross-linked with proteins such as albumin, the biomaterials obtained have higher biocompatibility due to reducing platelet adhesion and this property may be further enhanced on the surface of nanotubes. These characteristics along with high hydrophilicity allow the PEG-albumin-nanotube based hydrogels to be good candidates for several biomedical applications. We have explored the possibility of formation of a system based on photocuring involving BSA, different families of dye-bound nanotubes and PEG-diacrylate in the presence of visible light. The efficacy of gel formation was tested by varying the concentrations of the dyes as well as that of the PEG-diacrylate and the BSA used. Swelling studies were carried out on the products and swelling factors were obtained. The thermal properties of the gels were examined using DSC and TGA analysis. The morphologies were examined using TEM and AFM analyses. We are currently exploring this methodology for the formation of different classes of polymers as well.