Inorganic−Organic Hybrid Composites Containing MQ (II−VI) Slabs:  A New Class of Nanostructures with Strong Quantum Confinement and Periodic Arrangement

2001 ◽  
Vol 13 (10) ◽  
pp. 3754-3759 ◽  
Author(s):  
Xiaoying Huang ◽  
Heulings ◽  
Vina Le ◽  
Jing Li
Keyword(s):  
Quantum Confinement ◽  
Hybrid Composites ◽  
Organic Hybrid ◽  
New Class ◽  
Periodic Arrangement

Innovative Biomimetic Hybrid Composites to Repair Multifunctional Anatomical Region

2010 ◽  
Author(s):  
A. Tampieri ◽  
M. Sandri ◽  
T. D’Alessandro ◽  
M. Banobre-Lopez ◽  
J. Rivas
Keyword(s):  
Hybrid Composites ◽  
Osteochondral Lesions ◽  
Artificial Bone ◽  
Mineral Phase ◽  
Biologically Inspired ◽  
New Class ◽  
Self Assembling ◽  
Physico Chemical ◽  
Biomimetic Approach ◽  
Composition Structure

The development of biomimetic materials for osteochondral tissue substitution and repair can be the start for a revolution in the classical procedures of orthopaedic surgery. The persisting problems, linked to the absence of a complete functional recovery of the articulation and to the stabilization and protraction of the half-life of an articular prosthesis can be overcome by the new class of osteochondral substitutes. The characteristics of the artificial bone tissue are drastically different from those of the natural one and this is mainly due to the absence of the peculiar self-organizing interaction between apatite crystals and proteic matrix. At this purpose a biomimetic approach was used in which apatitic phases are directly nucleated on different macromolecular matrices, which act as template and induce peculiar physico-chemical features in the mineral phase to create a substitute for osteochondral lesions. In particular a biologically inspired approach was applied to nucleate bone-like hydroxyapatite (HA) nanocrystals on self-assembling collagen fibers. Biohybrid composite materials were obtained mimicking composition, structure and morphology of human osteochondral interfaces. [1–4]

Fabrication and Characterization Studies of Semiconductor-Impregnated Porous Vycor Glass

1989 ◽  
Vol 164 ◽  
Author(s):  
C. A. Huber ◽  
T. E. Huber ◽  
A. P. Salzberg ◽  
J. A. Perez
Keyword(s):  
Electrical Transport ◽  
Quantum Confinement ◽  
Characteristic Size ◽  
Vycor Glass ◽  
New Class ◽  
Transport Studies ◽  
Porous Vycor Glass ◽  
Characterization Studies ◽  
Fabrication And Characterization ◽  
Interconnected Pores

AbstractPorous Vycor glass has been impregnated with semiconductors by pressure forcing the nonwetting semiconductor melt into the interconnected pores. Dense semiconductor mesh-like microstructures with a characteristic size of 50 Å can be fabricated by this technique. Measurements are reported which show the composites are suitable for both optical and transport studies, particularly those addressing quantum confinement of carriers and unusual electrical transport phenomena in this new class of materials.

Nanostructured crystals: An unprecedented class of hybrid semiconductors exhibiting structure-induced quantum confinement effect and systematically tunable properties

2017 ◽  
Author(s):  
Jing Li ◽  
Xiao-Ying Huang
Keyword(s):  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Three Dimensional ◽  
Hybrid Nanostructures ◽  
Confinement Effect ◽  
Design And Synthesis ◽  
Organic Hybrid ◽  
Expansion Behavior ◽  
Dimensional Network ◽  
Hybrid Semiconductors

This article describes the structure-induced quantum confinement effect in nanostructured crystals, a unique class of hybrid semiconductors that incorporate organic and inorganic components into a single-crystal lattice via covalent (coordinative) bonds to form extended one-, two- and three-dimensional network structures. These structures are comprised of subnanometer-sized II-VI semiconductor segments (inorganic component) and amine molecules (organic component) arranged into perfectly ordered arrays. The article first provides an overview of II-VI and III-V semiconductors, II-VI colloidal quantum dots, inorganic-organic hybrid materials before discussing the design and synthesis of I-VI-based inorganic-organic hybrid nanostructures. It also considers the crystal structures, quantum confinement effect, bandgaps, and optical properties, thermal properties, thermal expansion behavior of nanostructured crystals.

Fiber Reinforced Epoxy Resin Composite Materials Using Carboxylate-Alumoxanes as Cross-Linking Agents

1999 ◽  
Vol 581 ◽  
Author(s):  
Cullen T. Vogelson ◽  
Yoshihiro Koide ◽  
Andrew R. Barrona
Keyword(s):  
Composite Materials ◽  
Resin Composite ◽  
Diglycidyl Ether ◽  
Alumina Nanoparticles ◽  
Resin Matrix ◽  
Hybrid Resin ◽  
Organic Hybrid ◽  
New Class ◽  
Epoxy Resin Composite ◽  
Ceramic Fillers

ABSTRACTChemically functionalized alumina nanoparticles (carboxylate-alumoxanes) are used as the inorganic component of a new class of inorganic-organic hybrid materials. Lysine- or para- hydroxybenzoic acid-derivatized alumoxanes are readily prepared from the reaction of boehmite, [Al(O)(OH)]n, with the appropriate carboxylic acid. The peripheral organic hydroxides and amines of these carboxylate-alumoxanes either react directly with epoxide resins, such as the diglycidyl ether of bisphenol-A (DER 332), to form a hybrid material, or in the presence of an organic resin and hardener system to form a composite material. SEM and AFM show a uniform distribution of alumina nanoparticles within the resin matrix. The properties and cure times of the alumoxane hybrid and composite materials are distinct from both the pure resins and from a physical blend of the resins with traditional ceramic fillers. A significant increase in thermal stability and tensile strength is observed for both the hybrid and composite resin systems. In addition, both carbon fiber and carbon/Kevlar® matting have been successfully incorporated into the hybrid resin systems resulting in further property improvements.

scholarly journals An Investigation on Wear, Hardness and Impact Behaviour of Hybrid Composites

2021 ◽  
Vol 9 (10) ◽  
pp. 538-546
Author(s):  
Gangadhara H S
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Epoxy Composite ◽  
Hybrid Composites ◽  
Pairwise Comparison ◽  
Relative Significance ◽  
Synthetic Fibers ◽  
New Class ◽  
The Matrix ◽  
Two Hybrid

Abstract: According to the environmental aspects, the combinations of natural and synthetic fibers has been used for making eco-friendly products. The present investigation has been made develop and characterize a new class of composites with a polymer called epoxy-resin as the matrix and Hemp and synthetic fibers (Carbon, E-glass, Kevlar) are the reinforcing material. These materials are fabricated using hand layup technique to frame a fallowing hybrid composite, 1) Hemp/Carbon/Epoxy 2) Hemp/E-glass/Epoxy 3) Hemp/Kevlar/epoxy composites of 3mm thickness to find the various mechanical properties (wear, hardness and impact strength) of produced samples as per ASTM Standards. For defining relative significance of measured norms pairwise comparison was done. Wear, Hardness and Impact properties are carried out. The effect of fiber loading and length on mechanical properties like wear, hardness and impact strength of composites is studied. In these fallowing conditions shows a better property. The result on this study indicated that Hemp/Kevlar/Epoxy composite shows better impact mechanical properties compare to another two hybrid composites. Hemp/E-Glass/Epoxy composite shows better wear and hardness properties compare to another two hybrid composites. Hemp/Carbon/Epoxy composite shows intermediate properties compare to Hemp/E-Glass/Epoxy and Hemp/Kevlar/Epoxy composite. Keywords: Hemp, Carbon, Glass, Kevlar, Epoxy, Wear, Hardness, Impact test

Synthesis of mesoporous nickel–titanium-trimesic acid inorganic–organic hybrid composite in ionic liquid microemulsions for adsorption of rhodamine B from aqueous solution

2020 ◽  
Vol 10 (2) ◽  
pp. 251-257
Author(s):  
Ranfeng Ye ◽  
Min Ni ◽  
Hao Chen ◽  
Shengqing Li
Keyword(s):  
Ionic Liquid ◽  
Rhodamine B ◽  
Photoelectron Spectroscopy ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Nickel Titanium ◽  
Isotherm Models ◽  
X Ray ◽  
Organic Hybrid ◽  
Trimesic Acid

For the first time, mesoporous nickel–titanium-trimesic acid (NTT) inorganic–organic hybrid composite was synthesized in water-in-[Bmim]PF6 ionic liquid microemulsions using the trimesic acid (BTC) as the linker. The synthesized NTT was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) analysis, powder X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) methods, etc. Then, the isotherm and kinetic of adsorption were studied. The experimental data were well fitted with isotherm models of Langmuir and Freundlich (IMLF) at 298 K and 308 K and better fitted with the isotherm model of Langmuir (IML) at 318 K with the adsorption capacity of 662.212 μmol/g (maximum). The adsorption of rhodamine B (RhB) on NTT can be described by pseudo-second-order (PSO) kinetic model. This proposed method for synthesis of mesoporous NTT inorganic–organic hybrid composite is facile, environment-friendly and operated at room temperature, which could be applied to synthesis of other mesoporous inorganic–organic hybrid composites.

Inorganic Polymers

2005 ◽  
Author(s):  
James E. Mark ◽  
Harry R. Allcock ◽  
Robert West
Keyword(s):  
Organic Materials ◽  
Materials Science ◽  
Hybrid Composites ◽  
Inorganic Polymers ◽  
Polymer Science ◽  
Organic Hybrid ◽  
Wide Range ◽  
Controlled Structure

Polymer chemistry and technology form one of the major areas of molecular and materials science. This field impinges on nearly every aspect of modern life, from electronics technology, to medicine, to the wide range of fibers, films, elastomers, and structural materials on which everyone depends. Although most of these polymers are organic materials, attention is being focused increasingly toward polymers that contain inorganic elements as well as organic components. The goal of Inorganic Polymers is to provide a broad overview of inorganic polymers in a way that will be useful to both the uninitiated and those already working in this field. There are numerous reasons for being interested in inorganic polymers. One is the simple need to know how structure affects the properties of a polymer, particularly outside the well-plowed area of organic materials. Another is the bridge that inorganic polymers provide between polymer science and ceramics. More and more chemistry is being used in the preparation of ceramics of carefully controlled structure, and inorganic polymers are increasingly important precursor materials in such approaches. This new edition begins with a brief introductory chapter. That is followed with a discussion of the characteristics and characterization of polymers, with examples taken from the field. Other chapters in the book detail the synthesis, reaction chemistry, molecular structure, and uses of polyphosphazenes, polysiloxanes, and polysilanes. The coverage in the second edition has been updated and expanded significantly to cover advances and interesting trends since the first edition appeared. Three new chapters have been added, focusing on ferrocene-based polymers, other phosphorous-containing polymers, and boron-containing polymers; inorganic-organic hybrid composites; and preceramic inorganic polymers.

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