Development of Photoresponsive Polymers and Polymer/inorganic Composite Materials Based on the Coumarin Chromophore PDF Download
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Author: Weizheng Fan
Publisher:
ISBN:
Category : Biomedical materials
Languages : en
Pages : 84
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Book Description
Stimuli responsive polymers show noticeable changes in their properties in response to environmental stimuli and are used in many applications. Various stimuli such as pH, temperature, and in our case, light have been used to bring about the desired effect. Due to their tunable photoresponsive properties, coumarin and its derivatives have been widely used in many functional polymeric materials. The first part of the thesis was focused on the development of visible light responsive coumarin chromophores. These new coumarin derivatives have the maximum UV absorption between 390-420nm, which could enable their utility in biomedical chemistry in future. The second part of this thesis was focused on the development of a class of low moduli photoresponsive polymers, based on the coumarin photoactive unit. These new photoresponsive materials can crosslink under 350nm irradiation. The new polymers have low moduli and show viscous properties before irradiation. Upon crosslinking they display a significant change in physical and mechanical properties. In order to extend the applications of these materials, we prepared a series of photoresponsive polymer/inorganic composite materials with silica. We believe, these polymers have the potential for various biomedical applications such as in filling voids in dental and osteological applications.
Author: Weizheng Fan
Publisher:
ISBN:
Category : Biomedical materials
Languages : en
Pages : 84
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Book Description
Stimuli responsive polymers show noticeable changes in their properties in response to environmental stimuli and are used in many applications. Various stimuli such as pH, temperature, and in our case, light have been used to bring about the desired effect. Due to their tunable photoresponsive properties, coumarin and its derivatives have been widely used in many functional polymeric materials. The first part of the thesis was focused on the development of visible light responsive coumarin chromophores. These new coumarin derivatives have the maximum UV absorption between 390-420nm, which could enable their utility in biomedical chemistry in future. The second part of this thesis was focused on the development of a class of low moduli photoresponsive polymers, based on the coumarin photoactive unit. These new photoresponsive materials can crosslink under 350nm irradiation. The new polymers have low moduli and show viscous properties before irradiation. Upon crosslinking they display a significant change in physical and mechanical properties. In order to extend the applications of these materials, we prepared a series of photoresponsive polymer/inorganic composite materials with silica. We believe, these polymers have the potential for various biomedical applications such as in filling voids in dental and osteological applications.
Author: Elaheh A. Chamsaz
Publisher:
ISBN:
Category : Coumarins
Languages : en
Pages : 251
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Book Description
Photoresponsive materials have unique properties which makes them attractive for biomedical applications such as targeted drug delivery and micropatterned devices. This dissertation utilized a unique approach for incorporation of photoresponsive moieties, alkoxyphenacyl or coumarin chromophores within polymer backbone to synthesize photodegradable polycarbonates, and polyesters. The alkoxyphenacyl polycarbonates showed efficient chain scission upon irradiation at 300 nm as evidenced by 1H NMR, SEC, and UV-Vis spectroscopy. The biocompatibility and biodegradability of photoresponsive alkoxyphenacyl based polycarbonates enables the development of nanoparticles and microfilms, encapsulated with drugs, which in turn can be used as a platform for drug delivery applications. In similar approach, coumarin polyesters showed chain scission upon irradiation at 254 nm and crosslinked upon irradiation at 350 nm as evidenced by 1H NMR, SEC, ATR-IR, and UV-Vis spectroscopy. The properties of the polymers were modulated by the functional groups or the co-monomers used in the polymerization. Biocompatibility and biodegradability of photoresponsive coumarin based polyesters enables the development of micropatterned device as a nerve guidance conduit. Additionally, antimicrobial coatings synthesized from cationic coumarin polyesters showed high efficacy towards inhibiting Pseudomonas aeruginosa attachment and biofilm formation, without significant cytotoxicity. These features make coumarin polyesters attractive candidates for applications such as antimicrobial coatings for implants or medical devices.
Author: Navid Rabiee
Publisher:
ISBN: 9781643276403
Category :
Languages : en
Pages : 46
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Book Description
Nanogels are three-dimensional nanosized networks that are formed by physically or chemically cross-linking polymers. They have been explored as a drug-delivery system due to their biocompatibility, high stability, particle-size adjustment, drug-loading capability and modification of the surface for active targeting by cognate receptors on the target cells of tissues. Nanogels can respond to stimuli such as pH, temperature, light and redox, which results in the controlled release of drugs and targeting of site by environmental stimuli and prevents accumulation in non-target tissues, minimizing the side effects of the drug. This book aims to provide a general introduction to nanogels and the design of various stimuli-sensitive nanogels that can control drug release in response to specific stimuli.
Author: Khouloud Jlassi
Publisher: Elsevier
ISBN: 0323461611
Category : Technology & Engineering
Languages : en
Pages : 548
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Book Description
Clay–Polymer Nanocomposites is a complete summary of the existing knowledge on this topic, from the basic concepts of synthesis and design to their applications in timely topics such as high-performance composites, environment, and energy issues. This book covers many aspects of synthesis such as in- situ polymerization within the interlamellar spacing of the clays or by reaction of pristine or pre-modified clays with reactive polymers and prepolymers. Indeed, nanocomposites can be prepared at industrial scale by melt mixing. Regardless the synthesis method, much is said in this book about the importance of theclay pre-modification step, which is demonstrated to be effective, on many occasions, in obtaining exfoliated nanocomposites. Clay–Polymer Nanocomposites reports the background to numerous characterization methods including solid state NMR, neutron scattering, diffraction and vibrational techniques as well as surface analytical methods, namely XPS, inverse gas chromatography and nitrogen adsorption to probe surface composition, wetting and textural/structural properties. Although not described in dedicated chapters, numerous X-ray diffraction patterns of clay–polymer nanocomposites and reference materials are displayed to account for the effects of intercalation and exfoliations of layered aluminosilicates. Finally, multiscale molecular simulation protocols are presenting for predicting morphologies and properties of nanostructured polymer systems with industrial relevance. As far as applications are concerned, Clay–Polymer Nanocomposites examines structural composites such as clay–epoxy and clay–biopolymers, the use of clay–polymer nanocomposites as reactive nanocomposite fillers, catalytic clay-(conductive) polymers and similar nanocomposites for the uptake of hazardous compounds or for controlled drug release, antibacterial applications, energy storage, and more. The most comprehensive coverage of the state of the art in clay–polymer nanocomposites, from synthesis and design to opportunities and applications Covers the various methods of characterization of clay–polymer nanocomposites - including spectroscopy, thermal analyses, and X-ray diffraction Includes a discussion of a range of application areas, including biomedicine, energy storage, biofouling resistance, and more
Author: Sung-Hoon Kim
Publisher: Elsevier
ISBN: 0080465625
Category : Science
Languages : en
Pages : 283
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Book Description
In the last 10 years organic dyes, traditionally used for coloring textiles and other materials, have become increasingly important in the hi-tech industries of electronics and optoelectronics. They can be used in optical data storage, new solar cells and biomedical sensors.Functional Dyes discusses the synthesis of these new, high-value dyes and pigments as well as their applications and performance. The chapters are arranged so that the reader logically advances from the fundamental concepts to more practical aspects of the technology in which they are used.In providing the reader with current information on functional dye chemistry, as well as important developments within the field, Functional Dyes is a valuable information source for dye and material chemists, researchers and graduates, who want a summary of the key advances in the field over the last 10 years and an authoritative view on future developments. * Provides a broad introduction to the science technology of the functional dye application* Reviews recent advances on synthesis and characteristics of the functional dyes and their applications* Is a valuable information source for dye and material chemists and researchers
Author: Katsuhiko Ariga
Publisher: Elsevier
ISBN: 0323994733
Category : Technology & Engineering
Languages : en
Pages : 648
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Book Description
Materials Nanoarchitectonics: From Integrated Molecular Systems to Advanced Devices provides the latest information on the design and molecular manipulation of self-organized hierarchically structured systems using tailor-made nanoscale materials as structural and functional units. The book is organized into three main sections that focus on molecular design of building blocks and hybrid materials, formation of nanostructures, and applications and devices. Bringing together emerging materials, synthetic aspects, nanostructure strategies, and applications, the book aims to support further progress, by offering different perspectives and a strong interdisciplinary approach to this rapidly growing area of innovation. This is an extremely valuable resource for researchers, advanced students, and scientists in industry, with an interest in nanoarchitectonics, nanostructures, and nanomaterials, or across the areas of nanotechnology, chemistry, surface science, polymer science, electrical engineering, physics, chemical engineering, and materials science. Offers a nanoarchitectonic perspective on emerging fields, such as metal-organic frameworks, porous polymer materials, or biomimetic nanostructures Discusses different approaches to utilizing "soft chemistry" as a source for hierarchically organized materials Offers an interdisciplinary approach to the design and construction of integrated chemical nano systems Discusses novel approaches towards the creation of complex multiscale architectures
Author: Jürgen Stampfl
Publisher: John Wiley & Sons
ISBN: 3527337172
Category : Technology & Engineering
Languages : en
Pages : 408
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Book Description
This first book on this fascinating, interdisciplinary topic meets the much-felt need for an up-to-date overview of the field. Written with both beginners and professionals in mind, this ready reference begins with an introductory section explaining the basics of the various multi-photon and photochemical processes together with a description of the equipment needed. A team of leading international experts provides the latest research results on such materials as new photoinitiators, hybrid photopolymers, and metallic carbon nanotube composites. They also cover promising applications and prospective trends, including photonic crystals, microfluidic devices, biological scaffolds, metamaterials, waveguides, and functionalized hydrogels. By bringing together the essentials for both industrial and academic researchers, this is an invaluable companion for materials scientists, polymer chemists, surface chemists, surface physicists, biophysicists, and medical scientists working with 3D micro- and nanostructures.
Author: Jinlian Hu
Publisher: Smithers Rapra
ISBN: 1909030333
Category : Science
Languages : en
Pages : 326
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Book Description
Shape-memory polymers (SMP) are a unique branch of the smart materials family which are capable of changing shape on-demand upon exposure to external stimulus. The discovery of SMP made a significant breakthrough in the developments of novel smart materials for a variety of engineering applications, superseded the traditional materials, and also influenced the current methods of product designing. This book provides the latest advanced information of on-going research domains of SMP. This will certainly enlighten the reader to the achievements and tremendous potentials of SMP. The basic fundamentals of SMP, including shape-memory mechanisms and mechanics are described. This will aid reader to become more familiar with SMP and the basic concepts, thus guiding them in undergoing independent research in the SMP field. The book also provides the reader with associated challenges and existing application problems of SMP. This could assist the reader to focus more on these issues and further exploit their knowledge to look for innovative solutions. Future outlooks of SMP research are discussed as well. This book should prove to be extremely useful for academics, R&D managers, researcher scientists, engineers, and all others related to the SMP research.
Author: Katsunori Tanaka
Publisher: John Wiley & Sons
ISBN: 3527344322
Category : Science
Languages : en
Pages : 560
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Book Description
Provides timely, comprehensive coverage of in vivo chemical reactions within live animals This handbook summarizes the interdisciplinary expertise of both chemists and biologists performing in vivo chemical reactions within live animals. By comparing and contrasting currently available chemical and biological techniques, it serves not just as a collection of the pioneering work done in animal-based studies, but also as a technical guide to help readers decide which tools are suitable and best for their experimental needs. The Handbook of In Vivo Chemistry in Mice: From Lab to Living System introduces readers to general information about live animal experiments and detection methods commonly used for these animal models. It focuses on chemistry-based techniques to develop selective in vivo targeting methodologies, as well as strategies for in vivo chemistry and drug release. Topics include: currently available mouse models; biocompatible fluorophores; radionuclides for radiodiagnosis/radiotherapy; live animal imaging techniques such as positron emission tomography (PET) imaging; magnetic resonance imaging (MRI); ultrasound imaging; hybrid imaging; biocompatible chemical reactions; ligand-directed nucleophilic substitution chemistry; biorthogonal prodrug release strategies; and various selective targeting strategies for live animals. -Completely covers current techniques of in vivo chemistry performed in live animals -Describes general information about commonly used live animal experiments and detection methods -Focuses on chemistry-based techniques to develop selective in vivo targeting methodologies, as well as strategies for in vivo chemistry and drug release -Places emphasis on material properties required for the development of appropriate compounds to be used for imaging and therapeutic purposes in preclinical applications Handbook of In Vivo Chemistry in Mice: From Lab to Living System will be of great interest to pharmaceutical chemists, life scientists, and organic chemists. It will also appeal to those working in the pharmaceutical and biotechnology industries.
Author: Wolfgang H. Binder
Publisher: John Wiley & Sons
ISBN: 3527670203
Category : Technology & Engineering
Languages : en
Pages : 638
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Book Description
Self-healing is a well-known phenomenon in nature: a broken bone merges after some time and if skin is damaged, the wound will stop bleeding and heals again. This concept can be mimicked in order to create polymeric materials with the ability to regenerate after they have suffered degradation or wear. Already realized applications are used in aerospace engineering, and current research in this fascinating field shows how different self-healing mechanisms proven successful by nature can be adapted to produce even more versatile materials. The book combines the knowledge of an international panel of experts in the field and provides the reader with chemical and physical concepts for self-healing polymers, including aspects of biomimetic processes of healing in nature. It shows how to design self-healing polymers and explains the dynamics in these systems. Different self-healing concepts such as encapsulated systems and supramolecular systems are detailed. Chapters on analysis and friction detection in self-healing polymers and on applications round off the book.
