title: Synthesis and Properties of Cellulose-Functionalized POSS-SiO2/TiO2 Hybrid Composites.
abstract: The mechanical, thermal, optical, electrical and morphological properties of cellulose, an excellent natural biomaterial, can be improved by organic-inorganic hybrid composite methods. Based on the pristine properties of cellulose, the preparation of cellulose-metal oxide hybrid nanocomposites using a dispersion process of nanoparticles into the cellulose host matrix by traditional methods, has limitations. Recently, the functionalized cellulose-polymer-based materials were considered to be an important class of high-performance materials, providing the synthesis of various functional hybrid nanocomposites using a sol-gel method. Transparent cellulose-POSS-amine-silica/titania hybrids were prepared by an in-situ sol-gel process in the presence of γ-aminopropyltrimethoxylsilane (γ-APTES). The methodology involves the formation of covalent bonding between the cellulose-POSS amine and SiO2/TiO2 hybrid nanocomposite material. An analysis of the synthesized hybrid material by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, differential thermal calorimetry, scanning electron microscopy, and transmission electron microscopy indicated that the silica/titania nanoparticles were bonded covalently and dispersed uniformly into the cellulose-POSS amine matrix. In addition, biological properties of the cellulose-POSS-silica/titania hybrid material were examined using an antimicrobial test against pathogenic bacteria, such as Bacillus cereus (F481072) and E. coli (ATCC35150) for the bacterial effect.
authors.forename: Gwang-Wook
authors.initials: GW
authors.lastname: Hong
authors.forename: Sivalingam
authors.initials: S
authors.lastname: Ramesh
authors.forename: Joo-Hyung
authors.initials: JH
authors.lastname: Kim
authors.forename: Hyeon-Ju
authors.initials: HJ
authors.lastname: Kim
authors.forename: Ho-Saeng
authors.initials: HS
authors.lastname: Lee
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D001409:Bacillus cereus / Q000254:growth & development; D002482:Cellulose / Q000737:chemistry / Q000494:pharmacology; D004926:Escherichia coli / Q000254:growth & development; D053761:Nanocomposites / Q000737:chemistry*; D017646:Organosilicon Compounds / Q000737:chemistry / Q000494:pharmacology; D012822:Silicon Dioxide / Q000737:chemistry / Q000494:pharmacology; D014025:Titanium / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D017646:Organosilicon Compounds; C521417:polyhedraloligosilsesquioxane; C009495:titanium dioxide; D012822:Silicon Dioxide; D002482:Cellulose; D014025:Titanium