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Surface Modification Of Intraocular Lens Polymers By Hydrophilic Graft Polymerization For Improved Ocular Implant Biocompatibility
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Book Synopsis Surface Modification of Intraocular Lens Polymers by Hydrophilic Graft Polymerization for Improved Ocular Implant Biocompatibility by : Ali Yahiaoui
Download or read book Surface Modification of Intraocular Lens Polymers by Hydrophilic Graft Polymerization for Improved Ocular Implant Biocompatibility written by Ali Yahiaoui and published by . This book was released on 2019-05-31 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Surface modification of materials for medical device applications Dissertation Discovery Company and University of Florida are dedicated to making scholarly works more discoverable and accessible throughout the world. This dissertation, "Surface Modification of Intraocular Lens Polymers by Hydrophilic Graft Polymerization for Improved Ocular Implant Biocompatibility" by Ali Yahiaoui, was obtained from University of Florida and is being sold with permission from the author. A digital copy of this work may also be found in the university's institutional repository, IR@UF. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation.
Book Synopsis Controlled Surface Modifications of Synthetic Polymers Via Radical Graft Polymerization by : Maryam Tamizifar
Download or read book Controlled Surface Modifications of Synthetic Polymers Via Radical Graft Polymerization written by Maryam Tamizifar and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthetic polymers such as polyethylene terephthalate (PET), polyamide (PA), polyacrylonitrile (PAN) and polypropylene (PP) possess many advantages such as high mechanical strength and elasticity, good chemical and abrasion resistance, however, also exhibit hydrophobic behavior and poor wettability, causing them limitations in comfort and application properties. Radical graft polymerization has been considered as a possible and effective method for surface modification of the synthetic polymers to improve surface properties or introduce new functionalities. However, having proper control of conventional free-radical polymerization to increase the grafting efficiency is challenging and critical due to the nature of radical reactions, limited fiber surface area, and lack of surface reactive groups. Therefore, having an appropriate method of control is critically important to achieve high grafting yields on synthetic fiber surfaces. As an effort to control radical graft polymerization on surfaces of synthetic fibers with focus on PET fibers, the Hansen Solubility Parameter (HSP) has been successfully employed to quantify mutual affinities of different reaction components in the grafting reaction system (vinyl monomers, radical initiators, solvents, crosslinkers, and fiber) through calculation of distances between different materials. Calculated HSP distance (R) values can serve as an effective measure to predict, increase and in other words to control the fate of the graft polymerization reaction on polymer (PET) surfaces. The competency of HSP in this regard has been investigated using several different vinyl monomers, initiators, solvents, and crosslinkers on PET surfaces. Successful graft polymerizations on PET surfaces were confirmed by FTIR analysis, and supported quantitatively by different measures such as gravimetric analysis (grafting yield), surface elemental analyses, relative moisture regain values, active chlorine content of grafted samples with N-H containing monomers, and dye uptake of the grafted products. Scanning electron microscope (SEM) was employed to examine surface morphologies of the grafted PET samples. Results indicate that for the selected grafting systems, in general, hydrophilic functional monomers show higher grafting values on PET surfaces compared to hydrophobic vinyl monomers without any crosslinkers. Disregarding the nature and properties of monomers (and other reaction components) HSP can successfully justify grafting values based on mutual affinities (HSP distances) between reaction components and provides effective control on surface radical graft polymerization of PET fibers. HSP can inform selection of solvents and initiators with suitable affinities between monomers and PET polymer. It appears that four major distances, initiator-PET, initiator-solvent, monomer-PET, and monomer-solvent, in the grafting reaction system have major roles in the fate and result of the grafting reaction efficiency.In order to increase the grafting values for hydrophobic monomers studied in the research, another component, a multi-vinyl crosslinker (CL), was added to the graft polymerization reaction system and the new interaction system was analyzed using HSP. As expected, results indicate addition of crosslinkers increased the grafting values of all six different monomers including hydrophobic monomers that had significantly low grafting values in absence of a crosslinker. Using HSP it was enlightened that although the monomer-PET, crosslinker-PET, and monomer-crosslinker interactions impart significant roles in controlling the radical graft polymerization on PET surfaces, monomer/crosslinker-solvent and monomer/crosslinker-initiator interactions are determining factors and affect the grafting values. Dyeing properties and active chlorine contents of the grafted samples with N-H containing monomers in presence of crosslinkers, show increased values that confirm positive control of the crosslinker in enhancing the grafting efficiency. Obvious morphological alteration in surface structure of grafted PET surfaces in presence of PEGDIA crosslinker is observed for all monomers by scanning electron microscopy. The significance of this research lies in the fact that, HSP can be an efficient tool to analyze different interactions (affinities) in the grafting system which enables one to effectively control (enhance) surface modification of inert polymers such as PET.
Download or read book Research Report written by and published by . This book was released on 1988 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Hydrophilic Polymer Expandable Intraocular Lens Implant by : Maya Yamagata Matsuda
Download or read book A Hydrophilic Polymer Expandable Intraocular Lens Implant written by Maya Yamagata Matsuda and published by . This book was released on 1997 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Polymer Applications in Medicine and Medical Devices by : Kayvon Modjarrad
Download or read book Handbook of Polymer Applications in Medicine and Medical Devices written by Kayvon Modjarrad and published by Elsevier. This book was released on 2013-12-05 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: While the prevalence of plastics and elastomers in medical devices is now quite well known, there is less information available covering the use of medical devices and the applications of polymers beyond medical devices, such as in hydrogels, biopolymers and silicones beyond enhancement applications, and few books in which these are combined into a single reference. This book is a comprehensive reference source, bringing together a number of key medical polymer topics in one place for a broad audience of engineers and scientists, especially those currently developing new medical devices or seeking more information about current and future applications. In addition to a broad range of applications, the book also covers clinical outcomes and complications arising from the use of the polymers in the body, giving engineers a vital insight into the real world implications of the devices they’re creating. Regulatory issues are also covered in detail. The book also presents the latest developments on the use of polymers in medicine and development of nano-scale devices. Gathers discussions of a large number of applications of polymers in medicine in one place Provides an insight into both the legal and clinical implications of device design Relevant to industry, academic and medical professionals Presents the latest developments in the field, including medical devices on a nano-scale
Download or read book Polymer Yearbook written by and published by . This book was released on 1984 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transactions, 3rd World Biomaterials Congress by :
Download or read book Transactions, 3rd World Biomaterials Congress written by and published by . This book was released on 1988 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Papers Presented at the ... Meeting by : American Chemical Society. Division of Polymer Chemistry
Download or read book Papers Presented at the ... Meeting written by American Chemical Society. Division of Polymer Chemistry and published by . This book was released on 1990 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biomaterials and Regenerative Medicine in Ophthalmology by : Traian Chirila
Download or read book Biomaterials and Regenerative Medicine in Ophthalmology written by Traian Chirila and published by Woodhead Publishing. This book was released on 2016-04-23 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomaterials and Regenerative Medicine in Ophthalmology, Second Edition, focuses on an aging population and the increasing instances of eye diseases. Biomaterials continue to be used for numerous medical devices for the restoration of eyesight, improving many patients’ quality of life. Consequently, biomaterials and regenerative medicine are becoming increasingly important to the advances of ophthalmology and optometry. This book provides readers with an updated and expanded look at the present status and future direction of biomaterials and regenerative medicine in this important field. Provides an integral and significant exploration of biomaterials and regenerative medicine, presenting crucial advances made in the fields of ophthalmology and optometry, such as the development of intraocular lenses and new applications for contact lens Presents a new and updated look at the future direction of biomaterials and regenerative medicine in this field Comprehensive coverage in a range of fields, including hydrogels, corneal tissue engineering, and stem cell therapies for the restoration of the ocular surface
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1991 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrophilic Surface Modifications of Bisphenol-A Polycarbonate and Polypropylene by Gamma Radidation-induced Graft Polymerization by : Keith Allen Daniels
Download or read book Hydrophilic Surface Modifications of Bisphenol-A Polycarbonate and Polypropylene by Gamma Radidation-induced Graft Polymerization written by Keith Allen Daniels and published by . This book was released on 1988 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biomaterials In asia by : Mingqiang Li
Download or read book Biomaterials In asia written by Mingqiang Li and published by Frontiers Media SA. This book was released on 2023-02-24 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applied Plastics Engineering Handbook by : Myer Kutz
Download or read book Applied Plastics Engineering Handbook written by Myer Kutz and published by William Andrew. This book was released on 2016-09-15 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applied Plastics Engineering Handbook: Processing, Materials, and Applications, Second Edition, covers both the polymer basics that are helpful to bring readers quickly up-to-speed if they are not familiar with a particular area of plastics processing and the recent developments that enable practitioners to discover which options best fit their requirements. New chapters added specifically cover polyamides, polyimides, and polyesters. Hot topics such as 3-D printing and smart plastics are also included, giving plastics engineers the information they need to take these embryonic technologies and deploy them in their own work. With the increasing demands for lightness and fuel economy in the automotive industry (not least due to CAFÉ standards), plastics will soon be used even further in vehicles. A new chapter has been added to cover the technology trends in this area, and the book has been substantially updated to reflect advancements in technology, regulations, and the commercialization of plastics in various areas. Recycling of plastics has been thoroughly revised to reflect ongoing developments in sustainability of plastics. Extrusion processing is constantly progressing, as have the elastomeric materials, fillers, and additives which are available. Throughout the book, the focus is on the engineering aspects of producing and using plastics. The properties of plastics are explained, along with techniques for testing, measuring, enhancing, and analyzing them. Practical introductions to both core topics and new developments make this work equally valuable for newly qualified plastics engineers seeking the practical rules-of-thumb they don't teach you in school and experienced practitioners evaluating new technologies or getting up-to-speed in a new field. Presents an authoritative source of practical advice for engineers, providing guidance from experts that will lead to cost savings and process improvements Ideal introduction for both new engineers and experienced practitioners entering a new field or evaluating a new technology Updated to include the latest technology, including 3D Printing, smart polymers, and thorough coverage of biopolymers and biodegradable plastics
Book Synopsis Surface Characterization of Polymer-drug Modified Vascular Stents and Intraocular Lenses by : Amin Elachchabi
Download or read book Surface Characterization of Polymer-drug Modified Vascular Stents and Intraocular Lenses written by Amin Elachchabi and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Paclitaxel release from the polymeric matrices was shown to inhibit human coronary smooth muscle cell growth in vitro whereas dexamethasone exhibited no similar effect. A second major subject of this research was a series of studies concerning the properties of foldable hydrophobic acrylic intraocular lenses (IOLs) which have not previously been investigated. Most IOLs implanted today in the U.S. and the western world are foldable. The goal of this research was to conduct new surface characterization studies on the surfaces of several different foldable lenses in clinical use. Atomic force microscopy showed that these IOLs have different morphologies and that hydration greatly altered the surface morphology of these implants. Contact angle goniometry studies indicated that water contact angles varied significantly from one lens to the other and that prolonged hydration led to a reduction of the water contact angle. Nanoindentation experiments yielded new information on the surface mechanical properties of IOLs and a new methodology was developed to analyze nanoindent data to determine the surface modulus and hardness of foldable IOLs and low modulus polymers in general. The novel surface properties studies reported here can be important in guiding the design and the development of new ocular implants.
Book Synopsis Progress in Biomedical Polymers by : Charles G. Gebelein
Download or read book Progress in Biomedical Polymers written by Charles G. Gebelein and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polymers for Biomedical Applications by : Anil Mahapatro
Download or read book Polymers for Biomedical Applications written by Anil Mahapatro and published by American Chemical Society. This book was released on 2008-04-17 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on applications of polymers for biomedical applications has increased dramatically to find improved medical plastics for this rapidly evolving field. This book brings together various aspects of recent research and developments within academia and industry related to polymers for biomedical applications.
Book Synopsis Nanostructured Thin Films and Surfaces by :
Download or read book Nanostructured Thin Films and Surfaces written by and published by John Wiley & Sons. This book was released on 2010-03-08 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book series Nanomaterials for the Life Sciences, provides an in-depth overview of all nanomaterial types and their uses in the life sciences. Each volume is dedicated to a specific material class and covers fundamentals, synthesis and characterization strategies, structure-property relationships and biomedical applications. The series brings nanomaterials to the Life Scientists and life science to the Materials Scientists so that synergies are seen and developed to the fullest. Written by international experts of various facets of this exciting field of research, the series is aimed at scientists of the following disciplines: biology, chemistry, materials science, physics, bioengineering, and medicine, together with cell biology, biomedical engineering, pharmaceutical chemistry, and toxicology, both in academia and fundamental research as well as in pharmaceutical companies. VOLUME 5 - Nanostructured Thin Films and Surfaces
