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This work focuses on designing self-actuated deformable solids for 4D printing such that a solid can be programmed into a temporary shape and later recovers to its original shape after heating. To avoid a high Polymer particles that switch shape in response to a stimulus Jin-Wook Yoo and Samir Mitragotri1 Department of Chemical Engineering, University of California, Santa Barbara, CA 93106 Edited* by David A. Tirrell, California Institute of Technology, Pasadena, CA, and approved May 14, 2010 (received for review January 10, 2010) 15 Jun 2016 Shape memory polymers (SMPs) are attractive materials due to their A review of stimuli-responsive shape memory polymer composites. Shape memory polymer (SMP) is capable of memorizing one or more temporary The external stimulus may be temperature (thermo-responsive; temperature  28 Feb 2020 Shape memory polymers are smart materials that produce shape changes under external Shape-morphing composites with designed micro-architectures. Functional stimuli responsive hydrogel devices by self-folding.

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Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 91125 USA. Search for more papers by this author. Stimuli Responsive Shape Memory Microarchitectures. Luizetta V. Elliott. orcid.org/0000-0002-6411-0239. Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 91125 USA. Search for more papers by this author. Elliott, Luizetta V. and Salzman, Erika E. and Greer, Julia R. (2020) Stimuli Responsive Shape Memory Microarchitectures.

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2016-08-08 · Two key attributes of SMPs are their ability to fix a temporary programmed shape (fixity) and to subsequently recover the original shape upon activation by a stimulus (recovery). 2019-12-30 · 4D printing is proposed based on the additive manufacturing of stimuli-responsive materials and structures, which can realize shape changing upon external stimuli. This article reviews the 4D printing methods and actuating performances of 4D printing structures based on shape memory polymers, hydrogels, liquid crystal elastomers, and electroactive polymers.

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This article reviews the 4D printing methods and actuating performances of 4D printing structures based on shape memory polymers, hydrogels, liquid crystal elastomers, and electroactive polymers. This article shows that the shape Supramolecular shape memory hydrogels (SSMHs) refer to shape memory polymers, in which temporary shapes are stabilized by reversible crosslinks such as supramolecular interactions and dynamic covalent bonds. Following a brief introduction of the conventional shape memory polymers (SMPs), this tutorial review is focused to summarize the recent 2016-04-25 · Here we demonstrate a new reversible shape-changing component design concept enabled by 3D printing two stimuli responsive polymers—shape memory polymers and hydrogels—in prescribed 3D In this work, a novel type of shape memory polymer nanocomposite was fabricated using chemically cross-linked poly(ε-caprolactone) with allyl alcohol as the matrix and Fe3O4 nanoparticles decorated conductive multiwalled carbon nanotubes (Fe3O4@M) as a magnetism and electricity responsive source. Furthermore, excellent programmable shape memory was demonstrated by shape memory and recovery cycles at −45 °C. Based on the shape memory capability of the glycerol-hydrogel, a through-line patterned actuator designed from the hierarchical kirigami structure could effectively carry cargoes for movement and control circuit switches by external stimuli at subzero temperatures. memory effect, and new functions.

Melting of the crystalline regions via heat causes a drop in the modulus of the material facilitating wetting of the substrate as well as enhancing the surface contact area with the substrate, which result in The shape-memory effect at the microlevel was quantified by the recovery ratio of cuboids (R r,micro), while at the nanolevel, the recovery ratio of the nanoroughness (R r,nano) was measured. The values of R r,micro could be tailored in a range from 42 ± 1% to 102 ± 1% and R r,nano from 89 ± 6% to 136 ± 21% depending on the applied compression ratio and the amount of vinyl acetate content 2019-12-30 · 4D printing is proposed based on the additive manufacturing of stimuli-responsive materials and structures, which can realize shape changing upon external stimuli.
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The introduction of functional materials and nanostructures results in shape memory polymer composites (SMPCs) with large recoverable deformation, enhanced Here we demonstrate a new reversible shape-changing component design concept enabled by 3D printing two stimuli responsive polymers-shape memory polymers and hydrogels-in prescribed 3D architectures. This approach uses the swelling of a hydrogel as the driving force for the shape change, and the temperature-dependent modulus of a shape memory Salzman is titled "Stimuli Responsive Shape Memory Microarchitectures" and was published in Luizetta V. Elliott et al. Stimuli Responsive Shape Memory Microarchitectures, Advanced Functional Shape memory polymer com-posites (SMPCs) have further enhanced and broadened the applications of shape memory polymers. In addition to reinforcement, SMPCs can enable or enhance athermal stimuli-active effects, novel shape memory effect, and new functions.

Huang W. M., Yang B., Various shape memory effects of stimuli-responsive shape memory polymers. Harper Meng 1, Habib Mohamadian 1, Michael Stubblefield 1, Dwayne Jerro 1, Samuel Ibekwe 1, Su-Seng Pang 2 and Guoqiang Li 1,2. Published 13 August 2013 • 2013 IOP Publishing Ltd Smart Materials and Structures, Volume 22, Number 9 As a class of stimuli-responsive polymers, SMPs can return to their initial shape from a programmed temporary shape under external stimuli, such as light, heat, magnetism, and electricity. The introduction of functional materials and nanostructures results in shape memory polymer composites (SMPCs) with large recoverable deformation, enhanced Salzman is titled "Stimuli Responsive Shape Memory Microarchitectures" and was published in Luizetta V. Elliott et al. Stimuli Responsive Shape Memory Microarchitectures, Advanced Functional Shape memory polymer com-posites (SMPCs) have further enhanced and broadened the applications of shape memory polymers. In addition to reinforcement, SMPCs can enable or enhance athermal stimuli-active effects, novel shape memory effect, and new functions.
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Upon exposure to an external stimulus, e.g. an increase in temperature, they have the capability of changing their shape. The shape‐memory effect results from the polymer's structure and morphol 2019-10-18 2020-10-20 Optimization Shape-Memory Situations of a Stimulus Responsive Composite Material Polymers (Basel). 2021 Feb 25;13(5):697. doi: 10.3390/polym13050697. Shape memory polymers (SMPs) are materials that can undergo programmable shape change in response to a specific stimulus.

Smart polymers (SPs) or stimuli-responsive polymers (SRPs) behave differently to those external stimuli, as their behavior is more rapid and nonlinear in nature and even a small magnitude of external stimulus can cause noticeable changes in their shape, size, color or conductivity.
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In this article, α-keratin hairs were investigated for the combined stimuli of thermo-solvent, solvent-solvent, and UV (radiation)-reductant sensitive SM abilities.

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This approach uses the swelling of a hydrogel as the driving force for the shape change, and the temperature-dependent modulus of a shape memory polymer to regulate the time of such shape … 2016-12-07 2021-02-25 Supramolecular shape memory hydrogels (SSMHs) refer to shape memory polymers, in which temporary shapes are stabilized by reversible crosslinks such as supramolecular interactions and dynamic covalent bonds. Following a brief introduction of the conventional shape memory … Abstract: The emerging 4D printing techniques open new horizons for fabricating self-actuated deformable objects by combing strength of 3D printing and stimuli-responsive shape memory materials. This work focuses on designing self-actuated deformable solids for 4D printing such that a solid can be programmed into a temporary shape and later recovers to its original shape after heating.

Academic and industrial research interest in the shape-memory effects (SMEs) of these SMP-based materials is growing for task-specific applications. Shape Memory Polymers and Shape Memory Polymer Compositions Responsive Towards Two Different Stimuli United States Patent Application 20090309258 Kind Code: Polymer particles that switch shape in response to a stimulus Jin-Wook Yoo and Samir Mitragotri1 Department of Chemical Engineering, University of California, Santa Barbara, CA 93106 Edited* by David A. Tirrell, California Institute of Technology, Pasadena, CA, and approved May 14, 2010 (received for review January 10, 2010) Stimuli Responsive Shape Memory Microarchitectures. Luizetta V. Elliott.