scholarly journals Chemistry And Applications Of Inorganic-Organic Polymers (Organically Modified Silicates)

1986 ◽  
Vol 73 ◽  
Author(s):  
H. Schmidt ◽  
B. Seiferling
Keyword(s):  
Sol Gel ◽  
Inorganic Materials ◽  
Organic Polymers ◽  
Polymeric Networks ◽  
Organically Modified Silicates ◽  
Sol Gel Process ◽  
Organically Modified ◽  
Polycondensation Process ◽  
Application Potential ◽  
Inorganic Organic Polymers

ABSTRACTThe combination of inorganic polymeric networks with organic components leads to inorganic-organic polymers. A convenient method for the introduction of organic radials into an inorganic backbone is the use of organosubstituted silico esters in a polycondensation process. This leads to≡Si-O-Si≡ network containing materials, so-called organically modified silicates (ORMOSILs). For the synthesis of the inorganic backbone, in opposition to the high temperature preparation of non-metallic inorganic materials like ceramics, “soft chemistry” methods have to be applied in order to preserve organic groupings to be incorporated. Therefore, the sol-gel process is a suitable technique [1–5]. A review over basic synthesis principles and chemical methods, their effect on special material properties and the application potential will be given.

Influence of Coumarin Dyes on the Laser Performance of Pyrromethene and Perylene Dyes Co-Doped into ORMOSILs

2007 ◽  
Vol 336-338 ◽  
pp. 574-576
Author(s):  
Hua Rong ◽  
Chun Fang Ye ◽  
Yu Yang ◽  
Guo Dong Qian ◽  
Zhi Yu Wang ◽  
...  
Keyword(s):  
Sol Gel ◽  
Laser Wavelength ◽  
Laser Dyes ◽  
Co Doping ◽  
Organically Modified Silicates ◽  
Sol Gel Process ◽  
Organically Modified ◽  
Transfer Mechanisms ◽  
Co Doped ◽  
Coumarin Dyes

Laser dyes perylene red (p-red) or pyrromethene 567 (p567) were co-doped with coumarin 440 (C440) or coumarin 500 (C500) into MTES- and VTES-derived organically modified silicates (ORMOSILs) by sol-gel process. The effects of coumarin dye concentration on the laser performances of p-red and p567 were investigated. The results from laser efficiency measurements illustrated that at optimized coumarin concentration, the slope efficiency of co-doped p-red increased by a factor of 2 while that of co-doped p567 increased marginally. It was also found that by co-doping coumarin, the laser wavelength of p-red blue shifted and the laser thresholds for p567 and p-red could be reduced. The energy transfer mechanisms involved were also discussed.

scholarly journals Organically Modified Silicates by the Sol-Gel Process

1984 ◽  
Vol 32 ◽  
Author(s):  
H. Schmidt
Keyword(s):  
Sol Gel ◽  
New Materials ◽  
Organic Components ◽  
Organically Modified Silicates ◽  
Sol Gel Process ◽  
Inorganic As ◽  
Organically Modified ◽  
General Aspects

ABSTRACTThe introduction of organic groups into inorganic networks by the sol-gel process opens the possibility for the preparation of new materials, and typical properties resulting from inorganic as well as from organic components may be combined. Some general aspects and different examples of material developments are reviewed.

scholarly journals Inorganic-Organic Composites by Sol-Gel Techniques

1989 ◽  
Vol 171 ◽  
Author(s):  
Helmut Schmidt
Keyword(s):  
Functional Properties ◽  
Structural Modification ◽  
Sol Gel ◽  
Surface Hardness ◽  
Structural And Functional Properties ◽  
Sol Gel Process ◽  
Polymeric Chains ◽  
Organically Modified ◽  
Structural Surface ◽  
Inorganic Organic Polymers

ABSTRACTThe sol-gel process opens the possibility of combining inorganic and organic units to new hybrid polymers. Organic units can be used for structural modification of the inorganic backbone, for creating new functions within an inorganic network and for building up organic polymeric chains. The materials show interesting perspectives with respect to structural (surface hardness, strength) and functional properties (e. g. diffusion, photocuring, incorporation of dyes, optical properties). A review over structural and functional properties of sol-gel derived inorganic-organic polymers (ORMOCERs = organically modified ceramics) is given.

Structure-Related Mechanical Properties of Ormosils by SOL-GEL Process

1992 ◽  
Vol 271 ◽  
Author(s):  
Yi Hu ◽  
John D. Mackenzie
Keyword(s):  
Mechanical Properties ◽  
Reaction Temperature ◽  
Fracture Strength ◽  
Modulus Of Elasticity ◽  
Sol Gel ◽  
Acid Catalyst ◽  
Polydimethyl Siloxane ◽  
Organically Modified Silicates ◽  
Sol Gel Process ◽  
Organically Modified

ABSTRACTThe mechanical properties corresponding to the different structures of organically modified silicates (Ormosils) prepared by the sol-gel process were studied. Tetraethoxysilane (TEOS) and polydimethyl siloxane (PDMS) were used as the inorganic and polymeric components, respectively. Large variations in the microstructure of the Ormosils were found by changing the reaction temperature, and the content of PDMS, acid catalyst (HCI),and water. The structure of the Ormosils and the mechanical properties were correlated by the edge connectivity. Modulus of elasticity and fracture strength were used to study their relations Ormosils structures.

scholarly journals Effects of Surface Functional Groups on the Adhesion of SiO2 Nanospheres to Bio-Based Materials

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1411
Author(s):  
Xiao ◽  
Xu ◽  
Niu ◽  
Zhu ◽  
Kou
Keyword(s):  
Adsorption Process ◽  
Sol Gel ◽  
Functional Materials ◽  
Inorganic Materials ◽  
Silica Nanospheres ◽  
Surface Functional Groups ◽  
Modified Silica ◽  
Adsorption Experiment ◽  
Organically Modified ◽  
Organically Modified Silica

The interactions between nanoparticles and materials must be considered when preparing functional materials. Although researchers have studied the interactions between nanoparticles and inorganic materials, little attention has been paid to those between nanoparticles and bio-based protein materials, like leather. In this study, organically modified silica nanospheres (SiO2 nanospheres) loaded with rose fragrance were prepared using (3-aminopropyl) triethoxysilane (APTES), (3-mercaptopropyl) triethoxysilane (MPTES), or 3-(2, 3-epoxypropyloxy) propyl triethoxysilane (GPTES) using the sol-gel method. To study the interactions between the modified SiO2 nanospheres and leather, a non-cross-linking adsorption experiment was conducted. According to the Dubinin–Radushkevich isotherm calculation, we found that the adsorption process of leather fiber and organically modified silica nanospheres is physical. The average adhesion energies of APTES-, MPTES-, and GPTES-modified SiO2 nanospheres on the leather are 1.34016, 0.97289, and 2.09326 kJ/mol, respectively. The weight gain, adsorption capacity, and average adhesion energy show that the modified SiO2 nanospheres can be adsorbed on leather in large quantities. The sensory evaluation confirmed that GPTES-modified SiO2 nanospheres endowed the leather with an obvious rose aroma.

Synthesis and Second-Order Optical Nonlinearity of Inorganic-Organic Hybrid Films Bearing Y-Type NLO Active Chromophore

2007 ◽  
Vol 336-338 ◽  
pp. 552-554
Author(s):  
Xiao Nan Mei ◽  
Hai Yao Lin ◽  
Yuan Jing Cui ◽  
Ping Lv ◽  
Guo Dong Qian
Keyword(s):  
Thermal Stability ◽  
Sol Gel ◽  
Optical Nonlinearity ◽  
Second Order ◽  
Inorganic Materials ◽  
Hybrid Films ◽  
Organic Hybrid ◽  
Type Silicon ◽  
Sol Gel Process ◽  
Organic Chromophore

In order to achieve a large hyperpolarizability (β) value and thermal stability, a novel Y-type silicon precursor ICTES-DBPNPI was synthesized. By the sol-gel process, the new organic-inorganic materials having organic chromophore were prepared.

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