Stimuli-responsive polymers are the type of polymeric materials defined as the responsive materials with the ability to react, sense, and respond to external condition in a predetermined shape. When stimuli-responsive polymers laminated/coated to a fabric, a smart fabric (waterproof, windproof, and breathable) is formed.

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. This article shows that the shape

Shape memory polymers (SMPs) are a category of smart materials5,6that have the capability to recover their permanent shapes from one or multiple temporarily deformed states when exposed to an external stimulus7, such as temperature8, moisture9, light10, electromagnetic field11, or ∆pH12. Here, a new strategy is developed to achieve dual-stimuli-responsive triple-shape memory with non-overlapping effect in one programming cycle. Here, a series of poly(l-lactide)-poly(tetramethylene oxide) glycol copolymers (PLA-PTMEG-A) is prepared by selected dangling photoresponsive anthracene moieties on the crystalline PTMEG backbone. Stimuli-responsive polymer Shape memory polymer Smart composite abstract The past decade has witnessed remarkable advances in stimuli-responsive shape memory polymers (SMPs) with potential applications in biomedical devices, aerospace, textiles, civil engineering, bionics engineering, energy, electronic engineering, and household products. 2013-08-13 · Stimuli-responsive shape memory polymers (SMPs) change their shapes in addition to other properties such as mechanical properties , phase separation , surface , permeability , optical properties , and electrical properties , upon small variation of environmental conditions such as temperature , electric field , light , magnetic field , pH value , sonic field , solvent ions , specific antigen Different multifunctional shape memory nanocomposites responsive to different kinds of stimulation methods, including thermal responsive, electro-activated, alternating magnetic field responsive, Their paper, co-authored with alumna Erika Salzman (BS '20) is titled " Stimuli Responsive Shape Memory Microarchitectures " and was published in the journal Advanced Functional Materials on December 8. This research was supported by the Chen Neuroscience Institute and the U.S. Department of Defense.

Stimuli responsive shape memory microarchitectures

Here we show an example where the petals of the flower Shape-memory polymers and their composites: Stimulus methods and applications Jinsong Lenga,⇑, Xin Lana, Yanju Liub, Shanyi Dua a Center for Composite Materials and Structures, Harbin Institute of Technology (HIT), P.O. Box 3011, No. 2 YiKuang Street, Harbin 150080, PR China bDepartment of Astronautical Science and Mechanics, Harbin Institute of Technology (HIT), P.O. Box 301, No. 92 West 2021-02-25 How do shape metal alloys work?License: Creative Commons BY-NC-SAMore information at http://k12videos.mit.edu/terms-conditions US20090309258A1 US12/223,812 US22381207A US2009309258A1 US 20090309258 A1 US20090309258 A1 US 20090309258A1 US 22381207 A US22381207 A US 22381207A US 2009309258 A1 US2009309258 A1 US 2009309258A1 Authority US United States Prior art keywords shape memory change segments shape memory polymer Prior art date 2006-02-10 Legal status (The legal status is … US20090309258A1 US12/223,812 US22381207A US2009309258A1 US 20090309258 A1 US20090309258 A1 US 20090309258A1 US 22381207 A US22381207 A US 22381207A US 2009309258 A1 US2009309258 A1 US 2009309258A1 Authority US United States Prior art keywords shape memory segments shape change memory polymer Prior art date 2006-02-10 Legal status (The legal status is … Shape-memory polymers (SMPs) enable the production of stimuli-responsive polymer-based materials with the ability to undergo a large recoverable deformation upon the application of an external stimulus. Academic and industrial research interest in the shape-memory effects (SMEs) of these SMP-based materials is growing for task-specific applications.

Elliott, Luizetta V. and Salzman, Erika E. and Greer, Julia R. (2020) Stimuli Responsive Shape Memory Microarchitectures. Advanced Functional Materials . ISSN 1616-301X. (In Press) https://resolver.caltech.edu/CaltechAUTHORS:20201209-163844443

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.

10 Dec 2020 In terms of designing for 4D printing, aspects of the shape memory effect (SME) induced eigenstrain in the stimulus-responsive materials,.

Stimuli responsive shape memory microarchitectures

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 Polymer are rubbery in nature, composed of long , entangled-polymer chains and these chains gets stretched under tension to accommodate the deformation. Subjecting the shapeless states to counter stimuli restores the dissociated bridges, and regenerates the original shape of the hydrogels. By the cyclic dissociation and reassembly of the stimuli-responsive bridges, the reversible switchable transitions of the hydrogels between stiff shaped hydrogel structures and soft shapeless states are demonstrated. Like the water responsive shape memory (SM) effect of β-keratin bird feathers, α-keratin hairs either existing broadly in nature are found responsive to many types of coupled stimuli in SM behaviors. In this article, α-keratin hairs were investigated for the combined stimuli of thermo-solvent, solvent-solvent, and UV (radiation)-reductant sensitive SM abilities. The related netpoints and For an explanation of the science behind this material, watch: https://www.youtube.com/watch?v=2DE3D9SLev8Elastic materials are a common part of the everyday 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.
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tures, microarchitectures, and extracellular matrix compositions, as well as generating Stimuli-responsive shape-memory materials and methods. Stimulus .

Related content A review of stimuli-responsive polymers for smart textile applications Jinlian Hu, Harper Meng, Guoqiang Li et al.- Feature article A review of stimuli-responsive shape memory polymer composites Harper Menga,b, Guoqiang Lia,b,* aDepartment of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA b Department of Mechanical Engineering, Southern University, Baton Rouge, LA 70813, USA article info Article history: Received 14 December 2012 Request PDF | Various shape memory effects of stimuli-responsive shape memory polymers | One-step dual-shape memory polymers (SMPs) recover their original (permanent) shape upon small variation of 2013-04-19 New stimulus-responsive shape-memory polyurethanes capable of UV light-triggered deformation, hydrogen bond-mediated fixation, and thermal-induced recovery J. Ban, L. Mu, J. Yang, S. Chen and H. Zhuo, J. Mater. Chem. A, 2017, 5, 14514 DOI: 10.1039/C7TA04463A If you are not the Different multifunctional shape memory nanocomposites responsive to different kinds of stimulation methods, including thermal responsive, electro-activated, alternating magnetic field responsive 2013-08-13 Multistimuli-responsive shape-memory polymers are highly desirable in various applications, and numerous modes have been developed in recent years. However, most of them need to reprogram before they are ready to respond to another stimulus while one is triggered.
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Their paper, co-authored with alumna Erika Salzman (BS '20) is titled "Stimuli Responsive Shape Memory Microarchitectures" and was published in .

Many review papers have been published on various SMPs especially thermal-responsive SMPs [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] . Shape memory alloys are stimulus-responsive materials with two universal properties: superelasticity and shape memory effect [7,8].

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2020-01-01 · Physical stimuli-responsive materials Temperature-responsive materials: Temperature is the most frequently used physical stimulus to achieve shape-transformation in bioprinted structures,,. A series of thermoresponsive materials have been developed based on the mechanism of thermal gelation.

Various shape memory effects of stimuli-responsive shape memory polymers Harper Meng, Habib Mohamadian, Michael Stubblefield et al.-Development of shape memory polyurethane fiber with complete shape recoverability Yong Zhu, Jinlian Hu, Lap-Yan Yeung et al.-Effect of steaming on shape memory polyurethane fibers with various hard segmentcontents 2020-11-05 · Herein, we prepared a series of smart fluorescent hydrogels with multi-stimuli responsive fluorescence, shape memory and self-healing properties, and explored their ability in constructing different multistage data encryption platforms. As shown in Fig. 1, the hydrogels were constituted by two physical cross-linked networks. 2019-01-09 · Recovery of the original shape can then be triggered only by an external stimulus. Shape-memory polymers are highly deformable materials that can be programmed to recover a memorized shape in 2020-01-01 · Physical stimuli-responsive materials Temperature-responsive materials: Temperature is the most frequently used physical stimulus to achieve shape-transformation in bioprinted structures,,.