Fabrication and characterization of molecular hybrid materials with lanthanides covalently bonded in silica via sol–gel process

2007 ◽  
Vol 61 (17) ◽  
pp. 3715-3718 ◽  
Author(s):  
Bing Yan ◽  
Yu-long Sui
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Covalently Bonded ◽  
Sol Gel Process ◽  
Fabrication And Characterization

Fabrication and Characterization of Ferrocene-Derived Sensor for Hydrogen Peroxide Detection

2014 ◽  
Vol 1073-1076 ◽  
pp. 597-600
Author(s):  
Qi Dan Chen ◽  
Ting Xia ◽  
Fei Wu ◽  
Xiao Dan Lv
Keyword(s):  
Hydrogen Peroxide ◽  
Sol Gel ◽  
Polyelectrolyte Multilayer ◽  
Hydrogen Peroxide Detection ◽  
Sol Gel Process ◽  
Oxidation Properties ◽  
Fabrication And Characterization ◽  
Electrochemical Monitoring ◽  
Electrical Activities

Ferrocene (Fc) is an organometallic compound of sandwich structure. As the anticancer and excellent electrical activities, ferrocene and its derivatives have many applications in electrochemical monitoring [1-3]. Hydrogen peroxide (HP), with strong permeability and oxidation properties, is the product of many peroxidase catalyzed reaction, and it is widely used in medical and cosmetic fields, even for food bleaching by some illegal merchants which may cause healthy problem. In this study, the polyelectrolyte multilayer films containing ferrocene-derived polymer assembling by sol-gel process [4] was introduced to HP determination as a sensor.

Synthesis and Characterization of Siloxane-Polyurethane Hybrid Materials

2008 ◽  
Vol 396-398 ◽  
pp. 481-484
Author(s):  
Rodrigo Jiménez-Gallegos ◽  
L. Téllez-Jurado ◽  
Luis M. Rodríguez-Lorenzo ◽  
Julio San Román
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Proton Nuclear Magnetic Resonance ◽  
X Ray Diffraction ◽  
Organic Part ◽  
Sol Gel Process ◽  
Nmr Techniques ◽  
Ft Ir ◽  
Characterization Of Materials

This paper focuses on the preparation of siloxane-polyurethane hybrid materials using a sol-gel method. The global aim of the project is to tailor mechanical properties, degradability rate, bioactivity and biocompatibility to design scaffolds for musculoskeletal applications. A series of seven hybrid materials were synthesized with varying the proportion of polydimethylsiloxane (PDMS), and Polyurethane (PU). The organic part ratios (by weight) employed were (% PDMS:% PU) 30:0, 35:5, 20:10, 15:15, 10:20, 5:25, and 0:30. The organic part was reacted with constant 70 % TEOS to obtain the hybrid materials. A sol-gel process was selected for the synthesis of the hybrids. The characterization of materials was carried out by the fourier-infrared spectroscopy (FT-IR), x-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electronic microscopy (SEM) and proton nuclear magnetic resonance (1H-NMR) techniques in order to analyze the structure, microstructure and chemical composition of the hybrid materials. Gelification time depends on the proportion of PU used. When no PU is employed, the gel time is 8 hours but it rises up to 18 days for 30 % of polyurethane. Materials range from opaque to translucent but with a greater fragility for greater amounts of polyurethane. No differences in the bonding of materials could be appreciated.

Continuous sol–gel derived SiOC/HfO2 fibers with high strength

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 35026-35032 ◽  
Author(s):  
Yao Xu ◽  
Dong Su ◽  
Hongjun Feng ◽  
Xiao Yan ◽  
Ning Liu ◽  
...  
Keyword(s):  
Sol Gel ◽  
High Strength ◽  
Sol Gel Process ◽  
Fabrication And Characterization

This study presents the fabrication and characterization of continuous SiOC/HfO2 fibers with high strength by the sol–gel process.

Preparation and characterization of organic-inorganic hybrid materials incorporating diphosphino moieties. Study of the accessibility of the phosphorus atoms included into the material

2000 ◽  
Vol 78 (11) ◽  
pp. 1519-1525 ◽  
Author(s):  
Jean-Philippe Bezombes ◽  
Claude Chuit ◽  
Robert JP Corriu ◽  
Catherine Reyé
Keyword(s):  
Solid State ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Inorganic Hybrid ◽  
Sol Gel Process ◽  
Inorganic Network

The hydrolysis-polycondensation by the sol-gel process of the aromatic diphosphines (X3SiC6H4)2PC6H4P(C6H4SiX3)2, which are rigid molecules bearing four hydrolysable SiX3 groups (X = OiPr, H), leads to new organic-inorganic hybrid materials, characterized by solid state 13C, 29Si, and 31P NMR spectroscopies. The accessibility of the phosphorus centres incorporated into the xerogel obtained from the diphosphine with X = OiPr has been studied. All the phosphorus atoms reacted quantitatively with H2O2, S8, and CH3I but only 20% with the more bulky reagent W(CO)5·THF. This result is explained by the rigidity of the inorganic network resulting from the high number of hydrolysable Si-OiPr groups in the precursor.Key words : Diphosphines, sol-gel process, xerogels, solid 31P NMR.

Preparation and characterization of epoxy-silica hybrid materials by the sol-gel process

2005 ◽  
Vol 40 (5) ◽  
pp. 1079-1085 ◽  
Author(s):  
Shao-Rong Lu ◽  
Hai-Liang Zhang ◽  
Cai-Xian Zhao ◽  
Xia-Yu Wang
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Sol Gel Process ◽  
Silica Hybrid
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