Microporous Materials Derived from the Thermal Decomposition of the Titania/PDMS Hybrid Particles

Nakade, Masato; Ichihashi, Kosuke; Ogawa, Makoto

doi:10.1007/s10934-005-6764-0

Cited by 9 publications

(9 citation statements)

References 24 publications

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“…Polydimethylsiloxane-TiO 2 materials prepared from titanium alkoxides and end-functionalized PDMS have been synthesized and reported to show interesting optical and elastic properties. [20][21][22] Hybrid TiO 2 -PDMS particles with controlled refractive index were synthesized by a co-precipitation method starting from titanium isopropoxides and methoxy-functionalized PDMS. 22 In the same manner polydimethylsiloxane-metal-oxo nanocomposites constituted by metal-oxo nanodomains embedded in a PDMS matrix have been prepared as transparent monoliths from dimethyldiethoxysilane and different metal alkoxides (metal M = Al, Ge, Sn, Ti, Zr, Nb, and Ta).…”

Section: Introductionmentioning

confidence: 99%

Solvent effects in the formation of hybrid materials based on titanium alkoxide-polysiloxane precursors

et al. 2008

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Hybrid TiO 2 -polysiloxane nanoparticles as well as hybrid TiO 2 -polysiloxane gels were prepared and characterized applying solvent-induced aggregation effects of titanium alkoxide-modified polysiloxane block copolymers. The functionalized polymers were prepared by the covalent attachment of coordination sites that allow the binding to metal alkoxides (M(OR) 4 ; M = Ti; R = ethyl, butyl, isopropyl). Composition and structure of the hybrid polymers were investigated by NMR and FT-IR spectroscopy. In a second step the metal-alkoxide functionalities were hydrolyzed to form the respective metal oxides. Depending on the solvent in which the hydrolysis took place, hybrid nanoparticles or gels were obtained as a result of the different compatibility of the polysiloxane blocks towards the polarity of the solvents. The formed materials were investigated by NMR, FT-IR, atomic force microscopy (AFM), electron microscopy, and dynamic light scattering (DLS).

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Section: Introductionmentioning

confidence: 99%

Solvent effects in the formation of hybrid materials based on titanium alkoxide-polysiloxane precursors

et al. 2008

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“…For the sample after the heat treatment at 500c C, the TEM image at the low magnification Ĭj100,000 showed amorphous-like structure same as the sample after the heat treatment at 400c C. 21 In the TEM image with a higher magnification j1,200,000 , lattice fringes a TEM micrograph of the hybrid particle after the heat treatment at 900c C. b Enlargement of a .…”

mentioning

confidence: 77%

“…20 By the heat treatment of the particles at 400c C, the hybrid particles were transformed to microporous particles with the BET surface area of over 300 m 2 g, which was derived from thermal decomposition of the silicone. 21 The thermal treatment led the transformation of silicone domain to silica, on the other hand, no obvious change was observed in the titania domains by the heat treatment below 400c C.…”

Section: -19mentioning

confidence: 95%

Phase Transformation of Titania Domains in the Titania/PDMS Hybrid Particles by Heat Treatment

Nakade

Ichihashi

Ogawa

2005

J. Ceram. Soc. Japan

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“…PDMS is widely used as a precursor for the silica layer, and the surface of PDMS can be converted to silicon oxide by various techniques such as low-temperature plasma oxidation, 18 UV/ozone treatment, [19][20][21] and pyrolytic degradation. 22,23 Recently, different three-dimensional structures of semiconductor, metal, and polymer have been fabricated using strain-driven self-rolling technique. [24][25][26][27][28][29][30] The strain in the film can arise by unequal thermal expansion of top and bottom layer, 31 different crystal lattice constants of top and bottom layer, [26][27][28][29] or unequal swelling of film in selective solvent.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for the Fabrication of Silica and Silica/Metal Hybrid Microtubes

et al. 2009

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This paper describes a novel and simple method to fabricate silica and silica/metal hybrid microtubes of very high aspect ratio via self-rolling of polymer layers. A trilayer of poly(dimethylsiloxane) (PDMS)/polystyrene (PS)/poly(4-vinylpyridine) (P4 VP) self-rolled into microtubes, when exposed to a solvent selective for P4 VP chains, because of the strain generated by the swelling of P4 VP layer. Oxidative pyrolysis of the polymer tubes at 700 °C removes all the organic part of the tube and converts PDMS into silica. Moreover, by depositing a metallic layer on the tripolymer layer, it was possible to obtain silica/metal hybrid tubes. The metallic layer can form the inner or outer wall of the tube by depositing it over or under the PDMS layer. The fabricated tubes were further characterized by optical microscopy, Fourier transform infrared (FTIR), high-resolution scanning electron microscopy (HRSEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive analysis (EDX), 29Si solid-state nuclear magnetic resonance (29Si NMR), and focused ion beam (FIB). The silica and silica/metal hybrid tubes have potential applications in micro- and nanofluidic devices, optoelectronic devices, and in catalysis.

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Microporous Materials Derived from the Thermal Decomposition of the Titania/PDMS Hybrid Particles

Cited by 9 publications

References 24 publications

Solvent effects in the formation of hybrid materials based on titanium alkoxide-polysiloxane precursors

Solvent effects in the formation of hybrid materials based on titanium alkoxide-polysiloxane precursors

Phase Transformation of Titania Domains in the Titania/PDMS Hybrid Particles by Heat Treatment

A Novel Approach for the Fabrication of Silica and Silica/Metal Hybrid Microtubes

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