Multi-stimuli responsive shape memory polymers synthesized by using reaction-induced phase separation

2016 ◽  
Vol 133 (24) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yufen Zhang ◽  
Xue Jiang ◽  
Ronglan Wu ◽  
Wei Wang
Keyword(s):  
Phase Separation ◽  
Shape Memory ◽  
Shape Memory Polymers ◽  
Stimuli Responsive

scholarly journals A Mini-Review of Shape-Memory Polymer-Based Materials : Stimuli-responsive shape-memory polymers

2020 ◽  
Vol 64 (4) ◽  
pp. 425-442
Author(s):  
Mathew J. Haskew ◽  
John G. Hardy
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
Research Interest ◽  
External Stimulus ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
Potential Applications ◽  
Shape Memory Effects ◽  
Stimuli Responsive Polymer

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. This mini-review covers interesting aspects of SMP-based materials, their properties, how they may be investigated and highlights examples of the potential applications of these materials.

scholarly journals Constitutive Modeling of multi-stimuli-responsive shape memory polymers with multi-functional capabilities

2021 ◽  
Vol 192 ◽  
pp. 106082
Author(s):  
Mahdi Baniasadi ◽  
Ebrahim Yarali ◽  
Mahdi Bodaghi ◽  
Ali Zolfagharian ◽  
Mostafa Baghani
Keyword(s):  
Shape Memory ◽  
Constitutive Modeling ◽  
Shape Memory Polymers ◽  
Stimuli Responsive ◽  
Functional Capabilities

Different Processing Methods to Obtain Porous Structure in Shape Memory Polymers

2007 ◽  
Vol 539-543 ◽  
pp. 663-668 ◽  
Author(s):  
Silvia Farè ◽  
Luigi de Nardo ◽  
S. De Cicco ◽  
M. Jovenitti ◽  
Maria Cristina Tanzi
Keyword(s):  
Porous Structure ◽  
Shape Memory ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
Porous Structures ◽  
Stimuli Responsive ◽  
Foaming Agents ◽  
Tissue Integration ◽  
Clinical Procedures ◽  
Good Ability

In the last few years, clinical procedures undergone huge modifications. Among them, mini-invasive surgery has modified the clinical practice and the quality of life of patients. Shape Memory Polymers (SMPs), a class of stimuli-responsive materials, can be considered ideal candidates for the design of devices for mini-invasive surgical procedures. Such a device can be inserted in a packed in, temporary shape and later can expand at body temperature. A bone defect could be filled by a SMP porous structure, that improves the tissue integration and healing. In this work, two different processing techniques to obtain porous shape memory polymer scaffolds from Calo MER™ and MM-4520, two SMPs, are presented. Porous structures were obtained by micro-extrusion with different chemical foaming agents or with sodium chloride, or by solvent casting/particulate leaching. The morphology, the thermo-mechanical and the shape recovery properties of the SMP porous samples were investigated. Tridimensional porous structures showed a well interconnected morphology, with a pore size in the range aimed for bone interaction applications. The shape memory properties were not significantly affected by the transformation processes: a good ability of recovering the original shape was verified. Therefore, the porous structures, obtained from these SMP materials, appear adequate for an use as bone filler.

Shape memory polyurethane/graphene nanocomposites: Structures, properties, and applications

2019 ◽  
Vol 36 (2) ◽  
pp. 151-166 ◽  
Author(s):  
Ayesha Kausar
Keyword(s):  
Shape Memory ◽  
High Performance ◽  
Functional Materials ◽  
Shape Memory Polymers ◽  
Photon Absorption ◽  
Future Research ◽  
Stimuli Responsive ◽  
Ph Change ◽  
Graphene Nanocomposites ◽  
Shape Memory Polyurethane

This review presents an overview of the versatile shape memory polyurethane/graphene nanocomposites. Shape memory polyurethanes can recover their original shape from an intermediate shape when triggered by an external stimulus, such as heat, electrical voltage, light, pH change, or water absorption. Shape memory polymers have a successful history in commercial use. The applications for shape memory polymers are highly varied across numerous industries ranging from aircraft structure to biomedical implants. Three different groups of stimuli-responsive shape memory polyurethane/graphene nanocomposites, thermoresponsive, resistive heating actuated, and photon absorption actuated, will be discussed in this review. The applications of shape memory polyurethane/graphene nanocomposite as actuators are also discussed. This article will be pioneering in widespread impression on the state-of-the-art knowledge in shape memory polyurethane/graphene nanocomposites. It does not intend to be an extensive summary, but instead is a guide for scientists looking to apply these uniquely functional materials for advance high-performance applications. Future research may reveal shape memory applications for polyurethane/graphene nanocomposites in electronics, aerospace, and biomedical industries.

Magnetic Field Actuation of Shape Memory Nanocomposites

2010 ◽  
Vol 123-125 ◽  
pp. 999-1002 ◽  
Author(s):  
Atefeh Golbang ◽  
Mehrdad Kokabi
Keyword(s):  
Magnetic Field ◽  
Shape Memory ◽  
Magnetic Particles ◽  
Shape Recovery ◽  
Shape Memory Polymers ◽  
Conventional Heating ◽  
Inductive Heating ◽  
Stimuli Responsive ◽  
Maximum Heat ◽  
Alternative Magnetic Field

Shape memory polymers are stimuli-responsive materials able to adaptively store a temporary (deformed) shape and recover a ‘memorized’ permanent shape under an external stimulus. In shape-memory polymers, changes in shape are mostly induced by heating, and exceeding a specific switching temperature, Tswitch. If polymers cannot be warmed up by heat transfer using a hot liquid or gaseous medium, noncontact triggering will be required. In this article, the magnetically induced shape-memory effect of composites from NdFeB magnetic particles and crosslinked low density polyethylene (XLDPE) shape memory nanocomposite containing 2 wt% nanoclay is introduced. Various amounts of NdFeB particles (5, 15, 40 wt %) were added to the nanocomposite. Electromagnetically triggered shape memory properties of the formed composites were conducted using an alternative magnetic field with a frequency of 9 kHz and strength of 15 kW. The shape recovery of samples was possible by inductive heating and the shape recovery rates comparable to those obtained by conventional heating methods were demonstrated. It was concluded that the maximum heat generation achievable by inductive heating in the alternative magnetic field depends on magnetic particle content. The sample containing 15wt% NdFeB reached a full shape recovery of 25% extension within 6 minutes remaining in the magnetic field.

Various shape memory effects of stimuli-responsive shape memory polymers

2013 ◽  
Vol 22 (9) ◽  
pp. 093001 ◽  
Author(s):  
Harper Meng ◽  
Habib Mohamadian ◽  
Michael Stubblefield ◽  
Dwayne Jerro ◽  
Samuel Ibekwe ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymers ◽  
Memory Effects ◽  
Stimuli Responsive ◽  
Shape Memory Effects

scholarly journals Additive Manufacturing of Information Carriers Based on Shape Memory Polyester Urethane

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1005 ◽  
Author(s):  
Dilip Chalissery ◽  
Thorsten Pretsch ◽  
Sarah Staub ◽  
Heiko Andrä
Keyword(s):  
Additive Manufacturing ◽  
Shape Memory ◽  
Shape Memory Polymers ◽  
Qr Code ◽  
Stimuli Responsive ◽  
Fused Filament Fabrication ◽  
Responsive Materials ◽  
Manufacturing Method ◽  
Polyester Urethane ◽  
Machine Readable

Shape memory polymers (SMPs) are stimuli-responsive materials, which are able to retain an imposed, temporary shape and recover the initial, permanent shape through an external stimulus like heat. In this work, a novel manufacturing method is introduced for thermoresponsive quick response (QR) code carriers, which originally were developed as anticounterfeiting technology. Motivated by the fact that earlier manufacturing processes were sometimes too time-consuming for production, filaments of a polyester urethane (PEU) with and without dye were extruded and processed into QR code carriers using fused filament fabrication (FFF). Once programmed, the distinct shape memory properties enabled a heating-initiated switching from non-decodable to machine-readable QR codes. The results demonstrate that FFF constitutes a promising additive manufacturing technology to create complex, filigree structures with adjustable horizontal and vertical print resolution and, thus, an excellent basis to realize further technically demanding application concepts for shape memory polymers.

scholarly journals Smart Materials for Biomedical Applications: The Usefulness of Shape-Memory Polymers

2019 ◽  
Vol 890 ◽  
pp. 237-247 ◽  
Author(s):  
Cristiana Fernandes ◽  
Geetha B. Heggannavar ◽  
Mahadevappa Y. Kariduraganavar ◽  
Geoffrey R. Mitchell ◽  
Nuno Alves ◽  
...  
Keyword(s):  
Shape Memory ◽  
Smart Materials ◽  
Biomedical Applications ◽  
Shape Memory Polymers ◽  
Smart Polymers ◽  
Stimuli Responsive ◽  
Smart Biomaterials

This review describes available smart biomaterials for biomedical applications. Biomaterials have gained special attention because of their characteristics, along with biocompatibility, biodegradability, renewability, and inexpensiveness. In addition, they are also sensitive towards various stimuli such as temperature, light, magnetic, electro, pH and can respond to two or more stimuli at the same time. In this manuscript, the suitability of stimuli-responsive smart polymers was examined, providing examples of its usefulness in the biomedical applications.

The Investigation about the Shape Memory Behavior of Wool

2008 ◽  
Vol 60 ◽  
pp. 1-10 ◽  
Author(s):  
Jin Lian Hu ◽  
Zheng E Dong ◽  
Yan Liu ◽  
Yi Jun Liu
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Shape Memory Polymers ◽  
Fundamental Concept ◽  
Stimuli Responsive ◽  
Responsive Materials ◽  
Shape Memory Behavior ◽  
Wool Fabrics ◽  
Permanent Shape

Shape memory polymers are a promising class of stimuli-responsive materials that have dual-shape capability. This kind of materials can recover their shape in a predefined way from temporary shape to desired permanent shape when exposed to an appropriate stimulus. In the development and extensive application of synthetic shape memory polymers on textile industrials, the thermal and hygrothermal effects of wool materials have attracted considerable attention. In this article the fundamental concept of the shape memory polymers and the fundamental aspects of the shape-memory effect were reviewed. The thermal and hygrothermal effects of wool materials were also summarized to discuss the shape memory behavior of wool materials. Besides the effects of synthetic shape memory polymers on the thermal and hygrothermal of the woven wool fabrics were introduced to show the shape memory behavior of treated wool further.

Sign in / Sign up

Export Citation Format

Share Document