title: [Structure and adsorption characterization of SBA-16 and functionalized materials].
abstract: In this study we synthesized a micro- and mesoporous material, SBA-16. And later on we functionalized it with octyltrimethoxysilane and octadecyltrimethoxysilane, respectively. The materials of SBA-16 and its functionalized form were characterized by nitrogen adsorption isotherms at 77K, small angle X-ray scattering (SAXS), Fourier-transform infrared (FT-IR), thermal gravimetric analysis (TGA), and adsorption isotherms of single component n-heptane, toluene and water vapour. The data of FT-IR and TGA demonstrated the successful chemical modification of surface and porous wall of SBA-16 with different hydrocarbon chains. The results of SAXS, nitrogen adsorption at 77K, and adsorption isotherms of probe molecules revealed that the functionalized SBA-16 materials possessed relatively less regularity, smaller BET surface area and pore volumes, and lower adsorption capacities for the probe molecules compared to the original SBA-16. However, the functionalized SBA-16 materials showed much less affinity to polar molecules such as water. This work provides useful fundamental information for future study of novel mesoporous silica materials as potential drug delivery carriers.
authors.affiliation: 476 Hospital, PLA, Fuzhou 350002, China. fuhos@163.com
authors.forename: Zongfu
authors.initials: Z
authors.lastname: Zheng
authors.forename: Guiyuan
authors.initials: G
authors.lastname: Guo
authors.forename: Yongpeng
authors.initials: Y
authors.lastname: Hu
authors.forename: Fuying
authors.initials: F
authors.lastname: Feng
authors.forename: Guoyan
authors.initials: G
authors.lastname: Xu
authors.forename: Hong
authors.initials: H
authors.lastname: Tan
mesh_terms: D000327:Adsorption; D004337:Drug Carriers / Q000737:chemistry; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D004337:Drug Carriers; D012822:Silicon Dioxide