Synthesis of functionalized SBA-15 with ordered large pore size and its adsorption properties of BSA |
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Authors: | Thi Phuong Binh Nguyen Jae-Wook Lee Wang Geun Shim Hee Moon |
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Affiliation: | aCentre for Functional Nano Chemicals (BK21) and Department of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, South Korea bDepartment of Chemical and Biochemical Engineering, Chosun University, Gwangju 501-759, South Korea |
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Abstract: | SBA-15, mesoporous material, is a very excellent candidate for drug delivery system because its pore size is easy to control according to synthesis conditions and the presence of swelling agent. In this study, a known swelling agent, 1,3,5-trimethylbenzene (TMB), was used to increase the pore size with increased aging temperature and prolonged aging time. Furthermore, 3-aminopropyltriethoxysilane (APTES) was incorporated on SBA-15 surface via post synthesis method to separate protein effectively. The samples were characterized by X-ray diffraction (XRD), nitrogen adsorption and desorption analyses, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Fourier Transform Infrared (FT-IR). Adsorption capacity increased with temperature at the isoelectric point (pI) of bovine serum albumin (BSA) regardless of the pore size of SBA-15 samples. Release studies were carried out in the range of pH from neutral to basic solution on unmodified and amine-modified samples. In addition, the adsorption mechanism was investigated by employing the pseudo-first order, pseudo-second order, and intraparticle diffusion models. |
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Keywords: | Functionalized SBA-15 Bovine serum albumin Adsorption Release |
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