Surface Modification Of Silica Nanoparticles Using Surface Coupling Agents PDF Download
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Author | : Hassan AlJama |
Publisher | : |
Total Pages | : 63 |
Release | : 2010 |
Genre | : |
ISBN | : |
Download Surface Modification of Silica Nanoparticles Using Surface Coupling Agents Book in PDF, ePub and Kindle
Author | : Daniel Timothy Reilly |
Publisher | : |
Total Pages | : 55 |
Release | : 2011 |
Genre | : |
ISBN | : |
Download Improved Surface Coating Methods of Silane Coupling Agents on Silica Nanoparticles to Enhance Stability and Surface Coverage Book in PDF, ePub and Kindle
Author | : E.F. Vansant |
Publisher | : Elsevier |
Total Pages | : 573 |
Release | : 1995-04-25 |
Genre | : Science |
ISBN | : 0080528953 |
Download Characterization and Chemical Modification of the Silica Surface Book in PDF, ePub and Kindle
Oxide surface materials are widely used in many applications, in particular where chemically modified oxide surfaces are involved. Indeed, in disciplines such as separation, catalysis, bioengineering, electronics, ceramics, etc., modified oxide surfaces are very important. In all cases, the knowledge of their chemical and surface characteristics is of great importance for the understanding and eventual improvement of their performances. This book reviews the latest techniques and procedures in the characterization and chemical modification of the silica surface, presenting a unified and state-of-the-art approach to the relevant analysis techniques and modification procedures, covering 1000 references integrated into one clear concept.
Author | : Ezgi Gürbıyık |
Publisher | : |
Total Pages | : 77 |
Release | : 2009 |
Genre | : |
ISBN | : |
Download Surface Modification of Silica Nanoparticles Using "Click" Chemistry Book in PDF, ePub and Kindle
Author | : Edwin P. Plueddemann |
Publisher | : Springer Science & Business Media |
Total Pages | : 238 |
Release | : 2013-11-11 |
Genre | : Science |
ISBN | : 1489903429 |
Download Silane Coupling Agents Book in PDF, ePub and Kindle
* It has been rumored that a bumble bee has such aerodynamic deficiencies that it should be incapable of flight. Fiberglass-reinforced polymer com posites, similarly, have two (apparently) insurmountable obstacles to per formance: 1) Water can hydrolyze any conceivable bond between organic and inorganic phase, and 2) Stresses across the interface during temperature cycling (resulting from a mismatch in thermal expansion coefficients) may exceed the strength of one of the phases. Organofunctional silanes are hybrid organic-inorganic compounds that are used as coupling agents across the organic-inorganic interface to help overcome these two obstacles to composite performance. One of their functions is to use the hydrolytic action of water under equilibrium condi tions to relieve thermally induced stresses across the interface. If equilib rium conditions can be maintained, the two problems act to cancel each other out. Coupling agents are defined primarily as materials that improve the practical adhesive bond of polymer to mineral. This may involve an increase in true adhesion, but it may also involve improved wetting, rheology, and other handling properties. The coupling agent may also modify the inter phase region to strengthen the organic and inorganic boundary layers.
Author | : Vikas Mittal |
Publisher | : John Wiley & Sons |
Total Pages | : 240 |
Release | : 2015-05-19 |
Genre | : Technology & Engineering |
ISBN | : 3527670297 |
Download Surface Modification of Nanoparticle and Natural Fiber Fillers Book in PDF, ePub and Kindle
A review of the various methodologies for the surface treatment of different types of inorganic spherical and fibrous fillers, describing ball milling, cationic polymerization, vapor phase grafting, plasma treatment and UV irradiation in detail. In addition, the book connects the resulting composite properties to the modified filler surface properties, thus allowing for a purposeful, application-oriented composite design.
Author | : Rajesh Ranjan |
Publisher | : |
Total Pages | : 134 |
Release | : 2008 |
Genre | : Graft copolymers |
ISBN | : |
Download Surface Modification of Silica Nanoparticles Book in PDF, ePub and Kindle
Surface modification of nanosized silica particles by polymer grafting is gaining attention. This can be attributed to the fact that it provides a unique opportunity to engineer the interfacial properties of these modified particles; at the same time the mechanical and thermal properties of the polymers can be improved. Controlled free radical polymerization is a versatile technique which affords control over molecular weight, molecular weight distribution, architecture and functionalities of the resulting polymer. Three commonly used controlled free radical polymerizations include nitroxide-mediated polymerization (NMP), atom transfer radical polymerization (ATRP) and reversible addition fragmentation transfer (RAFT) polymerization. ATRP and RAFT polymerization were explored in order to modify the silica surface with well-defined polymer brushes. A novel click-functionalized RAFT chain transfer agent (RAFT CTA) was synthesized which opened up the possibility of using RAFT polymerization and click chemistry together in surface modification. Using this RAFT CTA, the surface of silica nanoparticles was modified with polystyrene and polyacrylamide brushes via the "grafting to" approach. Both tethered polystyrene and polyacrylamide chains were found in the brush regime. The combination of ATRP and click chemistry was also explored for surface modification. A combination of RAFT polymerization and click chemistry was also studied to modify the surface via the "grafting from" approach. Our strategy included the (1) "grafting from" approach for brush formation (2) facile click reaction to immobilize the RAFT agent (3) synthesis of R-supported chain transfer agent and (4) use of the more active trithiocarbonate RAFT agent. Grafting density obtained by this method was significantly higher than reported values in the literature. Polystyrene (PS) grafted silica nanoparticles were also prepared by a tandem process that simultaneously employs reversible addition fragmentation transfer (RAFT) polymerization and click chemistry. The click reaction doesn't interfere with RAFT polymerization. With a suitable choice of a Cu(I) catalyst, it is possible to perform both RAFT polymerization and click chemistry together. In a single pot procedure, azidemodified silica, an alkyne-functionalized RAFT agent and styrene were combined to produce the desired product. As deduced by thermal gravimetric and elemental analysis, the grafting density of PS on the silica in the tandem process was intermediate between the "grafting to" and "grafting from" techniques. Relative rates of RAFT polymerization and click reaction were altered to control grafting density. ATRP was also used to modify the surface of silica nanoparticles via the "grafting from" approach. The surfaces of silica with homopolymers and diblock copolymers brushes were modified using surface initiated ATRP. The polymer grafted silica particles were characterized by FT-IR, TGA, XPS and elemental analysis.
Author | : Benjamine Tokuo Tsunajima |
Publisher | : |
Total Pages | : 144 |
Release | : 1925 |
Genre | : Foam |
ISBN | : |
Download On the Stability of Foam Book in PDF, ePub and Kindle
Author | : Kevin Ewsuk |
Publisher | : John Wiley & Sons |
Total Pages | : 492 |
Release | : 2007-07-02 |
Genre | : Technology & Engineering |
ISBN | : 0470184140 |
Download Characterization and Control of Interfaces for High Quality Advanced Materials II Book in PDF, ePub and Kindle
This volume includes papers from the Second International Conference on Characterization and Control of Interfaces for High Quality Advanced Materials, and Joining Technology for New Metallic Glasses and Inorganic Materials (ICCCI2006) in Kurashiki, Japan, 2006. Interfaces are critically important to a broad spectrum of materials and technologies. This Proceedings of ICCCI 2006 features 71 peer-reviewed papers on interface characterization and control technology for materials synthesis, powder processing, composite processing, joining, and to control airborne particulates.
Author | : Kash L. Mittal |
Publisher | : CRC Press |
Total Pages | : 421 |
Release | : 2007-05-11 |
Genre | : Science |
ISBN | : 9067644528 |
Download Silanes and Other Coupling Agents Book in PDF, ePub and Kindle
This book chronicles the proceedings of the Fifth International Symposium held on this topic in Toronto. A total of 26 papers covering many ramifications of silanes and other coupling agents are included in this book. The topics covered include: various ways to deposit silanes; silane adsorption; investigation of interfacial interactions between silanes and substrates; factors affecting effectiveness of silanes as adhesion promotors; silanes for corrosion inhibition/protection; application of silanes in a variety of technological areas; silanes in dental biomaterials, in understanding cellular adhesion, and in the field of textiles; and other (non-silane) coupling agents. This book provides a wealth of latest information on this highly technologically important topic and anyone interested in the use of these materials will find this book of great value and interest.