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Showing 1 to 20 of 43 for “"Shape Memory Polymer"”.
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Droplet manipulation on structured shape memory polymer surface
… achieve. In this work, we present a structured shape memory polymer (SMP) surface which shows dynamically tunable surface wettability through changeable surface morphology in order to manipulate water droplets. The structured SMP surface involves a SMP pillar array consisting of nanotextured …
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Thermo-mechanical characterization of carbon-reinforced shape memory polymer
Shape memory materials (SMM) are those materials that possess the inimitable quality of remembering their shapes. They recover their original shapes upon exposure to external stimulus like heat, light, electric field, magnetic field, moisture etc. Types of SMMs include shape memory alloys (SMAs), …
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Shape memory polymer adhesive gripper for pick-and-place applications
Over the past few years, shape memory polymers (SMPs) have been extensively studied in term of their remarkable reversible dry adhesive properties and related smart adhesive applications. However, these exceptional properties of SMPs have not been exploited for pick-and-place applications, which …
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Thermo-responsive and electroconductive shape-memory polymer composites for useful applications
Shape-memory polymers (SMPs) are stimuli-responsive materials with the ability to undergo a large recoverable deformation upon the application of an external stimulus. International research interest into the shape-memory effects (SMEs) of these polymers is rapidly growing. Unique polymer …
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Hierarchical design of morphing shape-memory polymer structures via topology optimization
Shape memory polymers (SMPs) are a class of active polymeric materials that have the ability to regain their original undeformed configuration from a deformed state under the application of an external stimulus. In this study, we focused on the design optimization of SMPs that are actuated by the …
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Actuation of shape memory polymer using magnetic fields for applications in medical devices
A novel approach to the heating and actuation of shape memory polymer using dispersed Curie temperature thermo-regulated particles is proposed. Such a material has potential applications in medical devices which are delivered via catheters. A variety of tests were performed to determine the …
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A Biomimic Self-healing Shape Memory Polymer Based Syntactic Foam for Smart Structural Composites
… development of a new self-healing Polystyrene Shape Memory Polymer (PSMP) based syntactic foam for service life extension in structural polymeric composites. The objective was to self-heal structural-length scale damage in an autonomous, efficient, timely and repeatable manner at the …
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Shape memory polymer dry adhesives and their use for advanced transfer printing enabling soft microsystems
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Effect of chemical structure and crosslinking density on the thermo-mechanical properties and toughness of (meth)acrylate shape-memory polymer networks
… a fundamental basis for designing (meth)acrylate shape memory polymer networks with specific failure strain, toughness, glass transition temperature, and rubbery modulus.
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Nitinol-reinforced shape-memory polymers
Reinforced shape-memory polymers have been developed from an acrylate based thermoset shape-memory polymer and nitinol wires. A rectangular shape-memory polymer measuring approximately 1 by 2 by 0.1 inches has a ten fold increase in actuation force under three-point bending when reinforced with two …
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Investigation of Polymer-Filled Honeycomb Composites with Applications as Variable Stiffness Morphing Aircraft Structures
Shape morphing in aerospace structures has the potential to reduce noise, improve efficiency, and increase the adaptability of aircraft. Among the many challenges in developing morphing technologies is finding suitable wing skin materials that can be both stiff to support the structural loads, …
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Microassembly via polymeric stamp-based transfer printing
… microfabrication. Polydimethylsiloxane (PDMS) or shape memory polymer (SMP) as “stamp material,” working in conjunction with 3-dimensional positioning stage, provides reliable and precise relocation method of a micro-scale object for device assembly. Theoretical approaches are studied and …
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Temperature and Water Responsive Shape Memory Polymers for Soft Tissue Expansion
A biodegradable thermoplastic shape memory polymer which can be used for 3D printing patient specific soft tissue expanders was synthesized and characterized. The bottlebrush polymer with Poly (vinyl alcohol) backbone and polyurethane side chains exhibited shape memory effect. Using an …
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Stop-flow lithography and its application to graphical encoding
… of colloidal building blocks with well-defined shape, size and composition, which cannot be provided with existing techniques. In this thesis, a new fabrication technique is presented combining Stop-Flow Lithography (SFL) and a spatial light modulator (SLM). With this technique, geometrically …
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Assessment and preliminary model development of shape memory polymers mechanical counter pressure space suits
… to assess the viability of a space qualified shape memory polymer (SMP) mechanical counter pressure (MCP) suit. A key development objective identified by the International Space Exploration Coordination Group, the development of a superior space suit with greater mobility and environmental …
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Magnetothermal multiplexing for biomedical applications
… deep brain stimulation, drug release, and shape memory polymer response are summarized, with discussion of the feasibility and utility of applying magnetothermal multiplexing to similar systems. The possibility of selective heating is motivated by a discussion of various models for heat …
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Processing and Properties of New Anisotropic and Mechanically Active Polymeric Composites
… and inexpensive method to fabricate micron-sized polymer fibers, and it has been employed in this work to develop highly anisotropic fibrous composites. Previous work has detailed the properties of using electrospinning to fabricate fibrous anisotropic composites that was achieved by embedding …
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Advanced transfer printing methods and their applications to functional surfaces
… substrate where they are utilized via a polymeric stamp. Transfer printing inherently promises the heterogeneous material integration to enable nontrivial functional structures and devices as inks are separately prepared on a donor substrate and assembled on other receiving substrates. …
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A large-deformation thermo-mechanically coupled elastic-viscoplastic theory for amorphous polymers : modeling of micro-scale forming and the shape memory phenomenon
Amorphous polymers are important engineering materials; however, their nonlinear, strongly temperature- and rate-dependent elastic-viscoplastic behavior is still not very well understood, and is modeled by existing constitutive theories with varying degrees of success. There is no generally agreed …
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Mechanical Properties of Candidate Materials for Morphing Wings
… morphing wing is defined as a wing that changes shape. Although engineers have been designing different morphing wing configurations, there has been limited research investigating materials that could be used as a skin for a morphing wing. Specifically, after investigating the different morphing …
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