Organic-Inorganic Hybrid Protonic Polymeric Electrolytes Grafted by Sulfonic Acid / Sulfonamide Moieties

1999 ◽  
Vol 575 ◽  
Author(s):  
Laurent Depre ◽  
Christiane Poinsignon ◽  
Michael Popall
Keyword(s):  
Relative Humidity ◽  
Polymer Electrolyte ◽  
Functional Groups ◽  
Sulfonic Acid ◽  
Sol Gel ◽  
Inorganic Hybrid ◽  
Conduction Mechanisms ◽  
Sol Gel Process ◽  
Polymeric Electrolytes ◽  
Conducting Membranes

ABSTRACTThin proton conducting membranes of an organic-inorganic polymer electrolyte bearing sulphonamide and sulfonic groups are prepared by sol-gel process. Polycondensation of alkoxysilanes provides the inorganic silicate backbone whereas the organic network is formed from reactive functional groups R'((-CH2)3-SO3H) and [(-CH2)3-SO2 NH2] of alkoxysilanes of R'Si[OR3] type. Proton conductivity measured in the dry and wet state under controlled Temperature and Relative Humidity increases from 10 -4 S.cm-1 under vacuum to 6 10-2S.cm-1 at 70°C and 96% RH. Conductivity dependence on temperature and associated conduction mechanisms are discussed in both states.

UV Curable Organic-Inorganic Hybrid Materials

2000 ◽  
Vol 628 ◽  
Author(s):  
Guang-Way Jang ◽  
Ren-Jye Wu ◽  
Yuung-Ching Sheen ◽  
Ya-Hui Lin ◽  
Chi-Jung Chang
Keyword(s):  
Hybrid Materials ◽  
Colloidal Silica ◽  
Sol Gel ◽  
Solution Ph ◽  
Uv Curable ◽  
Inorganic Hybrid ◽  
Degradation Temperature ◽  
Sol Gel Process ◽  
The Stability ◽  
Thermal Degradation Temperature

This work successfully prepared an UV curable organic-inorganic hybrid material consisting of organic modified colloidal silica. Applications of UV curable organic-inorganic hybrid materials include abrasion resistant coatings, photo-patternable thin films and waveguides. Colloidal silica containing reactive functional groups were also prepared by reacting organic silane and tetraethyl orthosilicate (TEOS) using sol-gel process. In addition, the efficiency of grafting organic moiety onto silica nanoparticles was investigated by applying TGA and FTIR techniques. Experimental results indicated a strong interdependence between surface modification efficiency and solution pH. Acrylate-SiO2 hybrid formation could result in a shifting of thermal degradation temperature of organic component from about 200°C to near 400°C. In addition, the stability of organic modified colloidal silica in UV curable formula and the physical properties of resulting coatings were discussed. Furthermore, the morphology of organic modified colloidal silica was investigated by performing TEM and SEM studies‥

Synthesis and Intermolecularly Mediated Assembly of Organic Pigment in Hybrid Coating Films

1998 ◽  
Vol 519 ◽  
Author(s):  
Y. Yan ◽  
Z. Duan ◽  
D.-G. Chen ◽  
S. Ray Chaudhuri
Keyword(s):  
Sol Gel ◽  
Hybrid Coating ◽  
Hypsochromic Shift ◽  
Hybrid Films ◽  
Coating Films ◽  
Organic Pigment ◽  
Inorganic Hybrid ◽  
Matrix Interactions ◽  
Sol Gel Process

AbstractThe insoluble, strongly hydrogen bonded organic pigment of 3,6-bis-(4-chlorphenyl)-l,4- diketopyrrolo [3,4-c] pyrrole was transiently blocked by adding carbamate groups, and consequently incorporated into organic-inorganic hybrid matrices by a sol-gel process. The homo- (pigment-pigment) and hetero-intermolecular (pigment-matrix) interactions were found to control both the assembly and dispersion of pigment molecules in the hybrid coating films. A weaker interaction between matrices and pigment molecules results in aggregation of the carbamate pigment in the methyl-silicate films. A stronger interaction forms a homogenous dispersion and coloration of the phenyl-silicate films. The as-prepared methyl- and phenylsilicate films doped with the organic pigment were distinguished by a morphology change and a blue (hypsochromic) shift in absorption from 550 to 460 nm. Thermal treatment can remove the carbamate groups and in-situ form the organic pigment in the hybrid films.

Synthesis of Photosensitive Organic-Inorganic Hybrid Polymers via Anhydrous Sol-Gel Process for Integrated Optics

2003 ◽  
Vol 780 ◽  
Author(s):  
Xinshi Luo ◽  
Congji Zha ◽  
Barry Luther-Davies
Keyword(s):  
Low Cost ◽  
Sol Gel ◽  
Optical Loss ◽  
Hybrid Polymer ◽  
Optical Losses ◽  
Hybrid Polymers ◽  
Inorganic Hybrid ◽  
Wide Range ◽  
Integrated Optical ◽  
Sol Gel Process

AbstractPhotosensitive organic-inorganic hybrid polymers were synthesised for integrated optical and optoelectronic devices by a non-hydrous sol-gel process of hydrolysis/condensation of 3-methacryloxypropyltrimethoxysilane (MPS), diphenyldimethoxysilane (DPhDMS), and zirconium isopropoxide (TPZ) with boric acid under anhydrous conditions. The methacryl groups of MPS are UVpolymerizable, which are suitable for low cost fabrication of waveguides with a “UV write/develop” process. The incorporation of DPhDMS and TPZ was found useful in reducing the optical loss and in enhancing the thermostability of the polymer. The refractive index of the hybrid polymer is tuneable from 1.4950 to 1.5360 by variation of the ratio among MPS, DPhDMS and TPZ. Optical characterisation showed that the material has low optical losses at the telecommunications windows (0.16 dB/cm at 1310 nm and 0.4 dB/cm at 1550nm). The hybrid polymer also showed a low birefringence (1.2×10-4), a large thermo-optic (TO) coefficient (-2.77 ×10-4), and an outstanding linearity of dn/dT in a wide range of temperature (from 25 °C to 200 °C). Waveguides forming ability for the hybrid polymer with UV imprinting was also demonstrated.

Novel Organic-Inorganic Hybrid Nanoparticles as Non-Viral Gene Vector

2008 ◽  
Vol 47-50 ◽  
pp. 1319-1322
Author(s):  
Yang Zhao ◽  
Pei Yin ◽  
Zu Yong Wang ◽  
Lei Ren ◽  
Qi Qing Zhang
Keyword(s):  
Gene Therapy ◽  
Encapsulation Efficiency ◽  
Sol Gel ◽  
Hybrid Nanoparticles ◽  
Viral Gene ◽  
Gene Vector ◽  
Inorganic Hybrid ◽  
Sol Gel Process ◽  
Gene Vectors

Novel hybrid biomaterial of gelatin-siloxane nanoparticles (GS NPs), with positive surface potential and lower cytotoxicity, was synthesized through a 2-step sol-gel process. The pDNA-GS NPs complex was formulated with high encapsulation efficiency, and exhibited and efficient transfection in vitro. We thus envision that the GS NPs material could serve as non-viral gene vectors for gene therapy.

Single-ion conductor nanocomposite organic–inorganic hybrid membranes for lithium batteries

2014 ◽  
Vol 2 (31) ◽  
pp. 12162-12165 ◽  
Author(s):  
Mathieu Meyer ◽  
Cyril Vechambre ◽  
Lydie Viau ◽  
Ahmad Mehdi ◽  
Olivier Fontaine ◽  
...  
Keyword(s):  
Lithium Batteries ◽  
Sol Gel ◽  
Hybrid Membranes ◽  
Inorganic Hybrid ◽  
Ion Conductor ◽  
Sol Gel Process ◽  
Flexible Membranes

A straightforward and versatile sol–gel process for the design and preparation of single-ion conductor flexible membranes.

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