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.

scholarly journals Synthesis and characterisation of organic-inorganic hybrid polymers: Polystyrene-SiO2 & Polystyrene-TiO2

2018 ◽  
Author(s):  
Josue Ayuso-Carrillo
Keyword(s):  
Organic Phase ◽  
Research Effort ◽  
Sol Gel ◽  
Chemical Species ◽  
Hybrid Particles ◽  
Hybrid Polymers ◽  
Inorganic Hybrid ◽  
Sol Gel Process ◽  
The Difference ◽  
Two Stages

This work focuses on the synthesis and characterisation of a new class of materials so-called organic-inorganic hybrid polymers, whose main characteristics are the synergy and bonding between an organic phase with an inorganic phase. This thesis is a research effort towards getting new and better materials for diverse and specialised applications.The synthesis of materials was carried out in two stages: in the first one hybrid particles of SiO2 and TiO2 were obtained via sol-gel process, both of them functionalised with vinyl groups, and nominal diameters of 200 nm and 220 nm, respectively. In the second stage hybrid polymers of the type polystryrene-SiO2 (PS-SiO2) and polystyrene-TiO2 (PS-TiO2) were obtained via free radical polymerisation, and employing different concentrations of the functionalised hybrid particles obtained in the first stage. These materials formed translucent and semiflexible films.The presence of the inorganic phase inside the organic phase for both systems, PS-SiO2 and PS-TiO2, promoted a decrease on the Tg inversely proportional to the concentration increase of PS-SiO2 and PS-TiO2, respectively, which suggests that the particles confer a plasticiser effect over the polymer matrix.For both systems, PS-SiO2 and PS-TiO2, apart from the Tg decrease, there were differences on the elastic modulus measured. These results suggest that these differences might be due to the difference in particle size and chemical species. Likewise, the thermal stability of both PS-SiO2 and PS-TiO2 increased significantly and in the same order, relative to pristine polystyrene.

ORMOCER®s (Organic-Inorganic Hybrid Polymers) for Telecom Applications: Structure/Property Correlations

2004 ◽  
Vol 847 ◽  
Author(s):  
Frank Kahlenberg ◽  
Michael Popall
Keyword(s):  
Optical Waveguide ◽  
Uv Light ◽  
Structural Characteristics ◽  
Optical Loss ◽  
Structure Property ◽  
Optical Losses ◽  
Hybrid Polymers ◽  
Inorganic Hybrid ◽  
Sensitive Film ◽  
Property Correlations

ABSTRACTThe development and characterization of fluoroaryl functionalized organic-inorganic hybrid polymers for optical waveguide applications is presented. The materials are prepared from organoalkoxysilanes in a two-step process. The first step is the formation of the inorganic polysiloxane network by hydrolysis and polycondensation in order to obtain a soluble resin. This can be mixed with a photo initiator and applied onto a substrate as a photo-sensitive film. Micro patterns (waveguides with core and cladding) are then manufactured in a second step by exposure to UV-light through a mask. The polymers are characterized with respect to application in the fabrication of telecom optical waveguide devices. Thus, special attention is turned to optical losses in the telecom wavelengths at 1310 nm and 1550 nm as well as to refractive indices. During all stages of ORMOCER® preparation, structure-property correlations are deduced from presented characterization data.Various spectroscopic tools give an insight into network structures of polycondensate resins and cured hybrid polymer samples. 29Si-NMR in particular is used for the quantitative analysis of siloxane species. With the aid of molecular modeling, structural characteristics of oligomeric intermediates as determined by experiment are visualized. ORMOCER® resins with low optical losses of 0.28 dB/cm at 1310 nm and 0.42 dB/cm at 1550 nm, respectively, are prepared. Subsequent micropatterning by means of photolithography results in waveguide and other test patterns. A low optical loss of 0.51 dB/cm at 1550 nm is measured on a waveguide manufactured from a photopatternable fluoroaryl functionalized ORMOCER®.

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‥

Photosensitivity of titania-doped hybrid polymer prepared by an anhydrous sol–gel process

2005 ◽  
Vol 27 (8) ◽  
pp. 1461-1466 ◽  
Author(s):  
Xinshi Luo ◽  
Congji Zha ◽  
Barry Luther-Davies
Keyword(s):  
Sol Gel ◽  
Hybrid Polymer ◽  
Sol Gel Process

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.

scholarly journals Synthesis and Characterization of Polyacrylic Acid Based Nano-Hybrid Polymers for Malachite Green Uptake

2020 ◽  
Vol 6 (2) ◽  
pp. 682-685
Author(s):  
Ashish Kumar ◽  
G.S. Chauhan
Keyword(s):  
Malachite Green ◽  
Polyacrylic Acid ◽  
Environmental Concern ◽  
Sol Gel ◽  
Spectroscopic Techniques ◽  
Hybrid Polymer ◽  
Retention Capacity ◽  
Hybrid Polymers ◽  
Organic Part ◽  
Swelling Studies

Removal of malachite green from water bodies is an environmental concern of utmost priority. It requires adsorbents that can efficiently operate under real conditions. In view of this, a new polyacrylic acid based nano-hybrid polymer was synthesized by using sol-gel method in which acrylic acid acts as an organic part and tetraethoxysilane (TEOS) as an inorganic component. The new series of two other nano-hybrid polymers were also synthesized by using nanoparticles of iron oxide and titanium dioxide. The synthesized nano-hybrid polymers were extensively characterized using FTIR and XRD spectroscopic techniques. Further the synthesized nano-hybrid polymers were subjected to swelling studies with respect to different parameter such as time, temperature and pH. Malachite green was used as a cationic dye for studying the uptake behavior of synthesized polymers. Maximum retention capacity (MRC) and reusability of hybrid polymers were also evaluated up to ten cycles. The hybrid polymer, poly(AAc)/TEOS was more effective with high dye retention capacity.

Organic–inorganic hybrids having a talc-like structure as suitable hosts to guest a wide range of species

2018 ◽  
Vol 47 (9) ◽  
pp. 2925-2932 ◽  
Author(s):  
J. Brendlé
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Step Method ◽  
Mild Conditions ◽  
Condensation Reactions ◽  
Wide Range ◽  
Sol Gel Process ◽  
Hydrolysis And Condensation ◽  
One Step

The sol–gel process involving hydrolysis and condensation reactions is an attractive way to form siloxane based hybrid materials since it is a one-step method performed under mild conditions.

Facile Synthesis of Cu2SnSe3 Thin Film via Sol-Gel Process

2014 ◽  
Vol 1004-1005 ◽  
pp. 774-777 ◽  
Author(s):  
Ji Wan Liu ◽  
Gui Lin Chen ◽  
Wei Feng Liu ◽  
Guo Shun Jiang ◽  
Chang Fei Zhu
Keyword(s):  
Low Cost ◽  
Sol Gel ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
X Ray Diffraction ◽  
X Ray ◽  
Absorbance Spectroscopy ◽  
Sol Gel Process ◽  
Ar Gas ◽  
Pure Cu

A low-cost non-vacuum process for fabrication of Cu2SnSe3 film by sol-gel method and knife-coating process is described. First, a certain amount of Copper (I) chloride and tin (IV) tetrachloride was dissolve into the mixture of water and alcohol and then some Polyvinyl Pyrrolidone (PVP) was added to the solution to obtain based colloidal solution. Next, precursor thin layer was deposited by knife-blading technique on soda-lime glass (SLG). Finally, precursor layer was annealed at selenium flow atmosphere carried by Ar gas at 550oC. Through X-ray diffraction (XRD) and Raman spectra, it is found that pure Cu2SnSe3 film was prepared successfully. Scanning electron microscopy (SEM) and UV–vis–NIR absorbance spectroscopy were used to characterize its morphology and optical bandgap.

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.

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