J Nanosci Nanotechnol
April 2012
Polystyrene (PS) microspheres coated with graphene oxide (GO) were prepared and the variation of their thermal properties according to the GO loading was examined. The GO content in the PS-GO nanocomposites was controlled by the GO dispersions at various concentrations. The GO was coated onto the surface of the PS microspheres through the strong ionic interaction between polyvinylpyrrolidone and the GO sheet.
View Article and Find Full Text PDFJ Nanosci Nanotechnol
May 2011
Nanoporous silica membranes were fabricated using 3-aminopropyltriethoxysilane (APS) and acyl chloride-functionalized multiwalled carbon nanotubes (MWCNTs). The amine groups of silane reacted with the functional groups (e.g.
View Article and Find Full Text PDFJ Nanosci Nanotechnol
February 2011
Polystyrene (PS) was prepared using two different polymerization methods (dispersion polymerization and seed polymerization) to investigate the steric stabilizer effect during the adsorption process of carbon nanotubes (CNTs) on the surface of PS microspheres. Experiments with different microsphere diameters and difference types of CNTs were conducted to analyze the curvature effect of the spheres on the adsorption mechanism. The results showed that PS microspheres prepared through dispersion polymerization exhibited preferable adsorption behavior compared to PS spheres prepared through seed polymerization, suggesting that poly(N-vinylpyrrolidone) led to improved adsorption interactions between the CNTs and the PS microspheres in the CNTs dispersion.
View Article and Find Full Text PDFBacterial cellulose/multiwalled carbon nanotube (MWCNT) composite cryogels were prepared via sol-gel chemistry using epichlorohydrin as a crosslinker. Their morphology and pore characteristics were examined under various conditions. The bacterial cellulose/MWCNT composite cryogels had a macroporous structure that contained mesopores and micropores due to the MWCNTs that were homogeneously incorporated in the macroporous network structure.
View Article and Find Full Text PDFTwo types of carbon nanotube (CNT) based films were fabricated by adsorbing two different types of multiwalled carbon nanotubes (MWCNTs) on bacterial cellulose membrane templates. A bacterial cellulose membrane consists of ribbon-shaped nanofibrils that are arranged to form a porous 3D network. These characteristics lead to the uniform deposition of MWCNTs on the membrane structure and the final CNT based films with high surface areas.
View Article and Find Full Text PDF