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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"silicone elastomer"”.
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Improving hydrophilicity of silicone elastomer by IPN formation with hyaluronan
… the most popular form on the market today is the silicone hydrogel, with nearly 70% of the market share. However, many contact lens wearers still have issues which cause them to discontinue lens use. It is estimated that between 25-35% of people discontinue use permanently. This can be traced back …
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The design and cadaveric assessment of a new artifial first metatarsophalangeal joint replacement for the great toe
… common types of FMTPJ prostheses are made from silicone elastomer. Although these have been in use since the 1960's, there are many problems associated with these and all other types of FMTPJ prostheses. For example, recent research has shown that silicone elastomer metatarsophalangeal …
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Three-Dimensional Microelectrode Array for Recording Dissociated Neuronal Cultures
… stimulation of the neuronal electrical activity. Silicone elastomer microfluidic layers provide an artificial vasculature for nutrient supply and aeration, as well as permit the loading of dissociated neurons into the structure. The fluidic layers also serve as insulation for the microelectrodes. …
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Magneto-elastic behavior in hard- and soft-MRE's including demagnetizing effects
… and mechanical behavior of magnetorheological elastomers (MREs) based on four possible permutations defined along particle alignment (Aligned and Unaligned) and magnetization (Hard- or Soft-magnetic) pairs. These pairs designations yield classes A-H, U-H, A-S and U-S. The last two classes …
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Design, build and test of a planar biaxial tensile testing machine for skin and other collagenous soft tissues
… measurement. Commissioning testing was done on a silicone elastomer (Smooth-On, Dragon Skin 10) which was used as a skin surrogate. The commissioning testing did not seek to characterise the surrogate material, but to verify that the machine operated as intended. As testing of biological specimens …
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DEVELOPMENT OF A NANOCOMPOSITE SENSOR AND ELECTRONIC SYSTEM FOR MONITORING OF LOCOMOTION OF A SOFT EARTHWORM ROBOT
… based on a carbon nanomaterial and a low-modulus silicone elastomer allows for a seamless integration with the body of the soft robot, accommodating large strains derived from bending, stretching, and physical interactions with obstacles. A scalable, costeffective, screen-printing method …
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The biomechanical analysis of the hand in rheumatoid arthritis patients with MCP arthroplasty
… used artificial finger joints rely on a silicone elastomer component for their flexibility. However, success of these implants has been mixed; with fracture rates for the elastomer component reported to be up to 82%. It is currently unknown why fracture of the elastomer occurs so …
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Composite inorganic membranes for hydrogen reaction, separation and purification.
… The reactants of the coating technique were silicone elastomer and isopentane promoted by a catalyst. The catalyst (silicone curing agent) was added as a templating agent to control the eventual adhesion and densification of the elastomer sol. In particular, the microporous membranes were …
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A modular device for vaginal administration of multiple therapeutic agents
… drugs will be prepared using a thermosetting silicone elastomer material and tested for in vitro drug release. By applying a modular construction approach based around a common architecture, this device may allow healthcare professionals to select the appropriate combination of therapies to …
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Quantitative sustainability assessment of pavement-vehicle interaction : from bench-top experiments to integrated road network analysis
… of deflection-induced PVI on small-scale silicone elastomer representations of two layered pavement systems, through visual observations of the pavement response and measurements of the dissipated energy. It is shown that the energy which is dissipated when a load moves at a constant speed …
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Novel high water content hydrogels
… The grafting of hydrophilic hydrogel layers onto silicone elastomer was attempted and the results evaluated using dynamic contact angle measurements. Following plasma oxidation to reduce the surface energy barrier to aqueous grafting chemistry, it was found that the wettability of the modified …
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Engineering Substrates for the Study of Cell Mechanical Interactions
… and were faithfully replicated and molded in a silicone elastomer. Next the substrates were plasma fluorinated and used to form elastomer stamps for microcontact printing and other applications requiring easy mold release. In chapter 5, I have used microcontact printing to fabricate substrates …
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Design, manufacture and commissioning of a low pressure quasistatic bulge tester for skin and membrane tissue
… To simplify commissioning testing, a commercial silicone elastomer suited for skin prosthetics, was used to manufacture specimens for uniaxial and bulge experimental testing. Two types of bulge specimens were manufactured, standard round specimens and elliptical specimens. The round specimens …
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Optimisation of silicone-based dielectric elastomer transducers by means of block copolymers – synthesis and compounding
… robust human muscle. In this regard, dielectric elastomers have been studied. Their actuation occurs when Maxwell stress exceeds elastic stress in the presence of an electrical field, resulting in contraction in thickness and planar expansion in the area. As well as an actuator, dielectric …
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Design and Development of an Anti-fouling Urinary Catheter Utilizing Active Surface Deformation
… The concept uses pressure-actuated chambers in elastomer constructs to generate regio-selective strain and thereby remove biofilms. We first grew mature Proteus mirabilis crystalline biofilms on flat silicone elastomer substrates, and showed that application of strain to the substrate debonded …
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Development of 'In vitro' intestinal models to study the pharmacology of drugs affecting the gastrointestinal tract in normal and diseased conditions. Development of a cell culture model for intestinal pharmacology.
… drugs on ISMC, which were plated onto glass and silicone elastomer substrate. The cultured ISMC responded to the application of drugs such as potassium chloride (KCl), carbachol, 5-HT and noradrenaline (NA). Large population of cocultures seeded onto silicone elastomers or cholesteric liquid …
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Thermal Stability of Al₂O₃/Silicone Composites as High-Temperature Encapsulants
… of this study. The evaluation revealed that silicone elastomers are processable for various types of package structure and exhibit excellent dielectric performance in a wide temperature range (25 - 250°C) but are insufficiently stable against long-term aging (used by some manufacturers, e.g., …
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The Development of Facial Prosthetics and Adhesives in Plastic and Reconstructive Surgery. A study in the application of prosthetic materials and devices used in plastic and reconstructive surgery together with tissue adhesives as an alternative to conventional ligation.
Various silicone elastomers have been evaluated for use in the prosthetic reconstruction of facial defects. Their strength, texture, flexibility, hardness, ease of preparation, pigment receptivity and retention, and their resistance to cleaning were compared and the data consulted when an elastomer …