Organophosphorus-Based Organic / Inorganic Hybrids

2000 ◽  
Vol 628 ◽  
Author(s):  
André Vioux ◽  
P. Hubert Mutin ◽  
Jean Le Bideau ◽  
Dominique Leclercq
Keyword(s):  
Sol Gel ◽  
Three Dimensional ◽  
Coupling Agents ◽  
Inorganic Hybrid ◽  
Metal Oxide Surfaces ◽  
Metal Phosphonates ◽  
Concise Review ◽  
Synthetic Routes ◽  
Gel Processing ◽  
Inorganic Network

ABSTRACTThis paper is a concise review of some recent works which highlights the interest of phosphonate groups RP (O)32- in the field of organic/inorganic hybrid materials, as a general alternative to silicon coupling agents in anchoring of an organic group to an inorganic support or within an inorganic network. Examples, focused on metals of groups 4 and 13, illustrate various synthetic routes, from the hydrothermal synthesis of two- or three-dimensional metal phosphonates, to the introduction of organic moieties into oxide matrices by sol-gel processing, without excluding the grafting of metal oxide surfaces.

A Facial Route for Preparation of Hydrophobic Nano-Silica Modified by Silane Coupling Agents

2017 ◽  
Vol 727 ◽  
pp. 353-358 ◽  
Author(s):  
Jian Hui Luo ◽  
Yuan Yang Li ◽  
Ping Mei Wang ◽  
Bi Bo Xia ◽  
Li Peng He ◽  
...  
Keyword(s):  
Sol Gel ◽  
Silica Particles ◽  
Coupling Agents ◽  
Nano Silica ◽  
Silane Coupling Agents ◽  
Stöber Method ◽  
Inorganic Hybrid ◽  
Organic Functional Groups ◽  
Silane Coupling ◽  
The Fourier Transform

Nano-silica was prepared using tetraethylorthosilicate (TEOS) as precursor by sol-gel technology based on stÖber method. These silica nanoparticals were further modified with silane coupling agents, i.e., Hexadecyltrimethoxysilane (HDTMS), dimethoxydiphenylsilane (DMMPS), to introduce organic functional groups on the surface of SiO2 nanoparticles. The Fourier transform-infrared (FTIR) spectra indicated that these silane coupling agents were anchored on the surface of silica particles. And the obtained organic–inorganic hybrid SiO2 particles showed an improvement in hydrophobicity, which can effectively inhibit these silica particles from aggregating.

Non-Hydrolyzed Resins for Organic-Inorganic Hybrid Coatings

2017 ◽  
pp. 771-801 ◽  
Author(s):  
Stefan Holberg
Keyword(s):  
Protective Coatings ◽  
Sol Gel ◽  
Hybrid Coatings ◽  
Industrial Scale ◽  
Atmospheric Moisture ◽  
Inorganic Hybrid ◽  
Chemical Structures ◽  
Hydrolysis And Condensation ◽  
Gel Processing ◽  
Area Of Application

This chapter focuses on resins based on non-hydrolyzed, monomeric and polymeric alkoxysilanes. As alternative to classical sol-gel processing, the resins are applied to a surface without a preceding hydrolysis step. Only after application, hydrolysis and condensation of the alkoxysilyl groups occur by means of atmospheric moisture to result cross-linked organic-inorganic hybrid coatings. While the use of non-hydrolyzed silanes is well established, for example by applying polyethyl silicate as binder for zinc-rich anti-corrosive primers, this chapter describes the chemical structures of various novel organic-inorganic hybrid precursors that have significantly extended the area of application to adhesives and scratch-resistant, repellent, or anti-fouling coatings. At present, individual resins are produced and applied at industrial scale in the fields of protective coatings and automotive topcoats.

Organic–Inorganic Hybrid Sol–Gel Materials For Optical Waveguide Application

2012 ◽  
Author(s):  
Ahmad Sharmi Abdullah ◽  
Amirjan Nawabjan ◽  
Norazan Mohd Kassim ◽  
Mohd Haniff Ibrahim ◽  
Mohamad Zahid Abdul Malek
Keyword(s):  
Optical Waveguide ◽  
Spin Coating ◽  
Optical Waveguides ◽  
Quartz Substrate ◽  
Sol Gel ◽  
Single Mode ◽  
Processing Technique ◽  
Inorganic Hybrid ◽  
Gel Processing ◽  
Butt Coupling

Pandu gelombang optik jalur berasaskan bahan–bahan sol–gel organik–bukan organic (hybrid) direka, disimulasi dan dibentuk. Bahan–bahan sol–gel hybrid tersebut disediakan daripada vinyltriethoxysilane (VTES), tetraethoxysilane (TEOS) dan tetrabutoxytitanate (TTBu) malalui kaedah pemprosesan sol–gel. Pandu gelombang optik tersebut telah dibentuk di atas lapisan quartz menggunakan kaedah penyalutan berputar, lithografi langsung, dan goresan kimia basah. Beberapa lapisan sol telah dibentuk demi mendapatkan struktur pandu gelombang dengan ketebalan yang sesuai untuk laluan mod cahaya sebagaimana diperolehi daripada simulasi. Kebolehan pandu gelombang untuk memandu cahaya pada panjang gelombang 1550 nm telah dicirikan mengunakan kaedah direct end–face fiber butt–coupling. Struktur fizikal pandu gelombang tersebut telah diperhatikan melalui mikroskop berkuasa tinggi. Keputusan yang diperolehi menunjukkan bahawa bahan yang dicadangkan boleh digunakan dalam aplikasi pemanduan gelombang optik pada panjang gelombang 1550 nm. Simulasi menunjukkan bahawa pandu gelombang jalur satu mod dapat direalisasikan jika ketebalan dan kelebaran pandu gelombang tersebut berada pada suatu julat nilai tertentu. Julat nilai tersebut dapat diperolehi melalui pengawalan parameter–parameter penyalutan berputar dan pembentukan mikro. Kualiti keratan rentas yang baik juga diperhatikan telah diperolehi melalui kaedah pembelahan semulajadi. Kata kunci: Pemprosesan sol–gel; bahan organik–bukan organic; pandu gelombang jalur Ridge optical waveguides based on organic–inorganic (hybrid) sol–gel materials were designed, simulated and fabricated. The hybrid sol–gel materials were synthesized from vinyltriethoxysilane (VTES), tetraethoxysilane (TEOS) and tetrabutoxytitanate (TTBu) precursors by means of sol–gel processing technique. The optical waveguides were fabricated on quartz substrate using spin coating, direct photolithography, and wet chemical etching techniques. Multiple layers of sol were deposited so as to obtain waveguide structure with suitable thickness for mode propagation such as acquired from the simulation. Waveguiding ability of the ridge optical waveguides at 1550 nm wavelength was characterized using direct end–face fiber butt–coupling method. Physical structure of the waveguides was observed through high power microscope. Observation showed that the proposed material possesses the ability for waveguiding application at the wavelength of 1550 nm. Simulation showed that a single mode ridge optical waveguide could be realized provided that the structure thickness and width are within certain range. The range is attainable through proper control of spin coating and micropatterning parameters. Acceptable end–face quality resulted from natural cleaving process was also discovered. Key words: Sol–gel processing; organic–inorganic material; ridge optical waveguide

Auto-organization of Nanostructured Organic−Inorganic Hybrid Xerogels Prepared by Sol−Gel Processing: The Case of a “Twisted” Allenic Precursor

2004 ◽  
Vol 16 (20) ◽  
pp. 3794-3799 ◽  
Author(s):  
Geneviève Cerveau ◽  
Robert J. P. Corriu ◽  
Eric Framery ◽  
Frédéric Lerouge
Keyword(s):  
Sol Gel ◽  
Inorganic Hybrid ◽  
Hybrid Xerogels ◽  
Gel Processing

scholarly journals Customized Borosilicate Bioglass Scaffolds With Excellent Biodegradation and Osteogenesis for Mandible Reconstruction

2020 ◽  
Vol 8 ◽  
Author(s):  
Peng Zhang ◽  
Kang Yang ◽  
Ziyu Zhou ◽  
Xingrong Zhu ◽  
Wenchao Li ◽  
...  
Keyword(s):  
3D Printing ◽  
Sol Gel ◽  
Three Dimensional ◽  
Mandible Reconstruction ◽  
3D Print ◽  
Important Approach ◽  
Gel Processing ◽  
Graft Reconstruction

Graft reconstruction of the mandible is an important approach that aims at improving the appearance and functionality of defected mandibles. The traditional implant materials are generally bioinert, non-degradable, and that they lack favorable pore structures for cell proliferation, which limit their clinical application. In this study, we used boron-containing bioactive glass which was combined with a three-dimensional (3D) printing technology to construct an osteoinductive implant scaffold, according to the imaging instructions of CT scan on bone defects. Here, the boron-containing bioglass scaffold (B-BGs) was prepared through sol-gel processing and a 3D print technique. Different boron content of borosilicate bioglass was prepared by incorporating B2O3 (molar: 19.4 and 38.8%) into 58S bioglass to replace parts of SiO2. For fabricated mandible implants through three-dimensional 3D printing of B-BGs (size: 8 × 2 mm; pore size: 250 μm) modified with borosilicate bioglass powder and sodium alginate. Notably, the compressive strength of the B-BGs was about 3.8 Mpa, which supported mandibular activity. Subsequently, the excellent biocompatibility of B-BGs was confirmed using cytotoxicity in vitro studies. Finally, data from in vivo experiments demonstrated that the B-BGs could promote bone regeneration and they could almost get completely degraded within 4 weeks. Our results showed that the boron-containing bioglass could repair mandibular defects.

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.

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