Bridged Polysilses-quioxanes: Molecular Engineering of Hybrid Organic–Inorganic Materials

MRS Bulletin ◽  
2001 ◽  
Vol 26 (5) ◽  
pp. 368-376 ◽  
Author(s):  
K.J. Shea ◽  
D.A. Loy
Keyword(s):  
Hybrid Materials ◽  
Molecular Engineering ◽  
Inorganic Materials

Hybrid materials lie at the interface of the organic and inorganic realms. These materials offer exceptional opportunities not only to combine important properties from both worlds, but also to create entirely new compositions with truly unique properties.

Combinatorial Peptide Libraries for Selecting Inorganic-Binding Proteins: A Step in Molecular Biomimetics

2003 ◽  
Vol 773 ◽  
Author(s):  
C. Tamerler ◽  
S. Dinçer ◽  
D. Heidel ◽  
N. Karagûler ◽  
M. Sarikaya
Keyword(s):  
Binding Proteins ◽  
Building Blocks ◽  
Molecular Engineering ◽  
Inorganic Materials ◽  
Combinatorial Peptide Libraries ◽  
Self Assembling ◽  
Complex Functions ◽  
Recent Developments ◽  
Specific Proteins ◽  
Molecular Biomimetics

AbstractProteins, one of the building blocks in organisms, not only control the assembly in biological systems but also provide most of their complex functions. It may be possible to assemble materials for practical technological applications utilizing the unique advantages provided by proteins. Here we discuss molecular biomimetic pathways in the quest for imitating biology at the molecular scale via protein engineering. We use combinatorial biology protocols to select short polypeptides that have affinity to inorganic materials and use them in assembling novel hybrid materials. We give an overview of some of the recent developments of molecular engineering towards this goal. Inorganic surface specific proteins were identified by using cell surface and phage display technologies. Examples of metal and metal oxide specific polypeptides were represented with an emphasis on certain level of specificities. The recognition and self assembling characteristics of these inorganic-binding proteins would be employed in develeopment of hybrid multifunctional materials for novel bio- and nano-technological applications.

scholarly journals Monitoring morphology and properties of hybrid organicinorganic materials from in situ polymerization of tetraethoxysilane in polyimide polymer: 1. Effect of the coupling agent on the microstructure and interfacial interaction

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
Hamid Kaddami ◽  
Carsten Becker-Willinger ◽  
Helmut Schmid
Keyword(s):  
Mechanical Properties ◽  
Hybrid Materials ◽  
Coupling Agent ◽  
In Situ Polymerization ◽  
Interfacial Interaction ◽  
Inorganic Materials ◽  
Hybrid Films ◽  
Morphological Transformation ◽  
Temperature Relaxation ◽  
Saxs Analysis

AbstractTransmission electron microscopy (TEM), small angle X-ray (SAXS) and dynamical mechanical thermal analysis (DMTA) were used to characterize the morphology and thermo-mechanical properties of hybrid organic inorganic materials. These materials were based on polyimide (PI) and tetraethoxysilane (TEOS). Polyimide polymer is prepared from 4,4’-oxydianiline (ODA) 2,2-Bis(3- amino-4-hydroxyphenyl) hexafluoro-propane (6F-OHDA) pyromellitic dianhydride (PMDA) polyamic polymer. In one family of hybrid materials 3- isocyanatopropyltriethoxysilane (ICTS) is used as coupling agent in order to enhance the interfacial interaction between polyimide and silica. It was possible to modulate the morphology as well as the optical and thermo-mechanical properties of these hybrid materials depending on the formulation used. TEM and SAXS analysis indicated that silica domains on the nanoscale level are obtained when coupling agent is used in the formulation. Additionally the TEM and SAXS analysis indicated that miscibility of the organic and the inorganic phases on the molecular scale is obtained in the hybrid films when ICTS as coupling agent is added to the polyamic acid. These techniques show a fractal structure of the hybrid materials with coupling agent. This was confirmed with DMTA analysis which shows very high temperature relaxation (more than 450°C). From this result it could be derived that the addition of ICTS causes a morphological transformation from discrete particulate microstructure to fine interpenetrated or co-continuous phases. The intimate miscibility of the phases is accompanied at the same time by the amelioration of thermo-mechanical properties of the hybrid films.

Molecular Engineering of Functional Inorganic and Hybrid Materials

2013 ◽  
Vol 26 (1) ◽  
pp. 221-238 ◽  
Author(s):  
C. Sanchez ◽  
C. Boissiere ◽  
S. Cassaignon ◽  
C. Chaneac ◽  
O. Durupthy ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Molecular Engineering

Bridged Polysilsesquioxanes. Molecular-Engineering Nanostructured Hybrid Organic-Inorganic Materials

2005 ◽  
pp. 50-85 ◽  
Author(s):  
K. J. Shea ◽  
J. Moreau ◽  
D. A. Loy ◽  
R. J. P. Corriu ◽  
B. Boury
Keyword(s):  
Molecular Engineering ◽  
Inorganic Materials

Energy Filtering Transmission Electron Microscopy of Polymers and Hybrid Materials

1999 ◽  
Vol 5 (S2) ◽  
pp. 628-629
Author(s):  
Alexander Du Chesne ◽  
Ralph Ulrich ◽  
Ulrich Wiesner
Keyword(s):  
Block Copolymers ◽  
Hybrid Materials ◽  
Interfacial Area ◽  
Inorganic Materials ◽  
Solution Temperature ◽  
Mixing Enthalpy ◽  
Structure Directing Agent ◽  
Selective Staining ◽  
Energy Filtering ◽  
Covalently Linked

A topic of growing importance is the nano-structuring of inorganic materials by exploiting interactions with self assembling polymers. One example are multiphase polymers.Driven by the mixing enthalpy, most polymers phase separate below their critical solution temperature. The components of block copolymers are covalently linked, restricting separation to microscopic length scales. Depending on composition, block copolymers form different equilibrium morphologies representing the energetically most favorable balance between- interfacial area and chain conformation.Mass thickness contrast of polymers is often weak and conventional TEM can thus fail to characterize the morphology unless selective staining methods exist. This is the case for the poly(isoprene)-b-poly(ethyleneoxide) diblock copolymer system (PI-b-PEO) used as a structure directing agent and to provide solubility (see below). Fig. 1 shows the micro-domain morphology of PI-b-PEO where the rubbery phase is selectively stained with OsO4 .Hybrid materials are obtained by addition of an inorganic precursor to a solution of PI-b-PEO in a "mutual" solvent.

Molecular biomimetics: nanotechnology and bionanotechnology using genetically engineered peptides

2009 ◽  
Vol 367 (1894) ◽  
pp. 1705-1726 ◽  
Author(s):  
Candan Tamerler ◽  
Mehmet Sarikaya
Keyword(s):  
Self Assembly ◽  
Specific Binding ◽  
Hierarchical Structures ◽  
Functional Materials ◽  
Organic Matrix ◽  
Genetically Engineered ◽  
Molecular Engineering ◽  
Inorganic Materials ◽  
Hybrid Functional ◽  
Molecular Biomimetics

Nature provides inspiration for designing materials and systems that derive their functions from highly organized structures. Biological hard tissues are hybrid materials having inorganics within a complex organic matrix, the molecular scaffold controlling the inorganic structures. Biocomposites incorporate both biomacromolecules such as proteins, lipids and polysaccharides, and inorganic materials, such as hydroxyapatite, silica, magnetite and calcite. The ordered organization of hierarchical structures in organisms begins via the molecular recognition of inorganics by proteins that control interactions and is followed by the highly efficient self-assembly across scales. Following the molecular biological principle, proteins could also be used in controlling materials formation in practical engineering via self-assembled, hybrid, functional materials structures. In molecular biomimetics, material-specific peptides could be the key in the molecular engineering of biology-inspired materials. With the recent developments of nanoscale engineering in physical sciences and the advances in molecular biology, we now combine genetic tools with synthetic nanoscale constructs to create a novel methodology. We first genetically select and/or design peptides with specific binding to functional solids, tailor their binding and assembly characteristics, develop bifunctional peptide/protein genetic constructs with both material binding and biological activity, and use these as molecular synthesizers, erectors and assemblers. Here, we give an overview of solid-binding peptides as novel molecular agents coupling bio- and nanotechnology.

scholarly journals Zeolite-derived hybrid materials with adjustable organic pillars

2016 ◽  
Vol 7 (6) ◽  
pp. 3589-3601 ◽  
Author(s):  
Maksym Opanasenko ◽  
Mariya Shamzhy ◽  
Fengjiao Yu ◽  
Wuzong Zhou ◽  
Russell E. Morris ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Inorganic Materials ◽  
Top Down ◽  
Textural Characteristics ◽  
Different Types

Porous organic–inorganic materials with tunable textural characteristics were synthesized using the top-down process by intercalating silsesquioxanes and polyhedral oligomeric siloxanes of different types between crystalline zeolite-derived layers.

Thermomechanical properties of silica-polyacrylic nanocomposites

MRS Advances ◽  
2017 ◽  
Vol 2 (49) ◽  
pp. 2745-2750
Author(s):  
Adán Fuentes-Miranda ◽  
Bernardo Campillo-Illanes ◽  
Marta Fernández-Garcia ◽  
Daniel López-García
Keyword(s):  
Hybrid Materials ◽  
Polymer Matrix ◽  
High Surface ◽  
Polymeric Materials ◽  
Inorganic Materials ◽  
Nanocomposite Films ◽  
Organic Polymer ◽  
Mechanical And Thermal Properties ◽  
Scanning Calorimetry ◽  
Inorganic Particles

ABSTRACTThe synthesis of inorganic/organic nanocomposite systems, well known as hybrid materials, represents a new class of polymeric materials, which combine properties of inorganic particles, such as barrier, optical, catalytic and conductive properties, among others, with flexibility and transparency of the organic polymer matrix, being easily processable. They could be applied in a diversity of areas such as textiles, inks, adhesion, biomaterials, paints, adhesives, and electronics [1-2]. Within the inorganic materials, silica nanoparticles which present excellent properties, such as high mechanical strength, thermal and chemical stability, and high surface area, have been widely incorporated into a polymer matrix to prepare polymer/silica hybrid materials [3-4]. It is reported that the quantity and the dispersion of nano-SiO2 in the polymer matrix have a real effect on the properties of the final materials [5-6].In this work, hybrid silica/poly(butyl acrylate-methyl methacrylate-acrylic acid) (SiO2/P(BA-MMA-AA)) were synthesized via in situ semi-batch emulsion polymerization. The results showed that this process was produced with high monomer conversion and low formation of agglomerates. The thermomechanical behavior of the films obtained from latexes was characterized by using thermogravimetric analysis, differential scanning calorimetry, and tensile test. The nanocomposite films displays significantly improved mechanical and thermal properties over its pure polymer film, and also presents almost the same high transparency.

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