Sequential and selective shape memory by remote electrical control

Cortés, Alejandro Ángeles; Pérez-Chao, N.; Jiménez‐Suárez, Alberto; Campo, M.

doi:10.1016/j.eurpolymj.2021.110888

Cited by 8 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The energetic efficiency of the resistive heating process has been studied by Cortés et al for a thermosetting epoxy SMP with 0.2 wt % MWCNTs. Furthermore, because the heating can be generated locally in the surfaces of interest, this last work also illustrates the ability of sequentially activating the shape recovery of different regions within a SMC plate, as shown in Figure , under a voltage in the range 126–265 V. The same research group studied the IR-activated shape recovery of printed shape memory acrylic resins with 0.1 wt % MWCNTs …”

Section: Electro- and Magnetoactive Smcs: Fillers And Activationmentioning

confidence: 99%

“…The regions that heat up depend on which electrodes are used for injecting the electric current. During the first 10 min the current is injected between the central and left electrodes and during the last 10 min between the central and right electrodes (reprinted from ref ( 102 ), with permission of Elsevier.)…”

Section: Electro- and Magnetoactive Smcs: Fillers And Activationmentioning

confidence: 99%

See 1 more Smart Citation

Review of Thermoresponsive Electroactive and Magnetoactive Shape Memory Polymer Nanocomposites

et al. 2022

View full text Add to dashboard Cite

Electroactive and magnetoactive shape memory polymer nanocomposites (SMCs) are multistimuli-responsive smart materials that are of great interest in many research and industrial fields. In addition to thermoresponsive shape memory polymers, SMCs include nanofillers with suitable electric and/or magnetic properties that allow for alternative and remote methods of shape memory activation. This review discusses the state of the art on these electro- and magnetoactive SMCs and summarizes recently published investigations, together with relevant applications in several fields. Special attention is paid to the shape memory characteristics (shape fixity and shape recovery or recovery force) of these materials, as well as to the magnitude of the electric and magnetic fields required to trigger the shape memory characteristics.

show abstract

Section: Electro- and Magnetoactive Smcs: Fillers And Activationmentioning

confidence: 99%

Section: Electro- and Magnetoactive Smcs: Fillers And Activationmentioning

confidence: 99%

Review of Thermoresponsive Electroactive and Magnetoactive Shape Memory Polymer Nanocomposites

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The former commonly includes flexible segments and an amorphous phase, which could memorize the deformed temporary shape. The latter usually includes rigid segments, [ 7 ] crystalline phase, [ 8 ] and entanglements, [ 9 ] which could maintain and retain the original shape. [ 10 ] Initially, the SMP exhibits the original stable shape, which was fabricated during the forming process.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Shape Memory PEG/IEM Resin and Its Composite Designed for Ureter Stent

Zhang

Zhao

et al. 2023

Adv Healthcare Materials

View full text Add to dashboard Cite

In this paper, isocyanoethyl methacrylate (IEM) is used to functionalize the two ends of poly(ethylene glycol) (PEG) diol with acrylic acid groups through an urethanization reaction. The synthesized PEG/IEM resin is then photo-cured with a 405 nm ultraviolet lamp. T trans of the PEG/IEM resin can be regulated by the different molecular weights of PEG and the use of plasticizer Triacetin to reach 44 °C, which is closer to the human body temperature. Cytotoxicity assay and DMA shape memory cycling testing show that the PEG/IEM resin has excellent biocompatibility and shape memory properties. The flower structure is prepared and its shape recovery process is demonstrated. The performance of 10wt% nano Fe 3 O 4 /PEG4000/IEM resin and its composite spring stent structure satisfy the requirement of the stent properties in vivo, and can quickly recover to the original shape under magnetically driven. This work provides a material option for developing new biological application devices such as ureter stents.

show abstract

“…Additionally, some photomechanical systems such as liquidcrystalline polymers can be remotely actuated by light, [25,26] while electro-active polymers require contact of the electrodes with the actuator. [27] These systems are limited in applications due to their direct contact with the trigger or they could be triggered by only one specific stimulus. In contrast, magnetite nanoparticles (MNPs) could convert light energy into heat energy by near-infrared (NIR) irradiation.…”

Section: Introductionmentioning

confidence: 99%

A Multiple Remotely Controlled Platform from Recyclable Polyurethane Composite Network with Shape‐Memory Effect and Self‐Healing Ability

Chen

Zeng

Luo

et al. 2022

Small

View full text Add to dashboard Cite

Stimuli‐responsive materials can transform from temporary to permanent shapes by specific external triggers. However, the damage might inevitably occur to them when exposed to complex environments, causing a significant reduction in their lifetime and quality. In this study, recyclable remotely controlled shape‐changing polyurethane composite with self‐healing compacity is developed from polyethylene glycol, polytetrahydrofuran diol using isophorone diisocyanate as crosslinker. After the incorporation of magnetite nanoparticles (MNPs), remote heating could be generated by near‐infrared irradiation and alternating magnetic fields. The results show that MNPs are uniformly distributed in the smart networks, resulting in tunable temperature changes of the polymer composite material under various direct/indirect triggering in bending experiments, presenting different shape recovery rates. Moreover, to enhance the self‐healing capability, a disulfide bond is introduced into the polymer networks, and the results show that highly efficient and rapid healing could be achieved from tensile tests, scanning electron microscopy as well as optical microscopy. Additionally, the synergistic effect of transesterification and the dynamic exchange of disulfide bonds brin the networks reproducibility for recycling use. The obtained material is promising to be an alternative material for soft robots and smart sensors.

show abstract

Sequential and selective shape memory by remote electrical control

Cited by 8 publications

References 29 publications

Review of Thermoresponsive Electroactive and Magnetoactive Shape Memory Polymer Nanocomposites

Review of Thermoresponsive Electroactive and Magnetoactive Shape Memory Polymer Nanocomposites

Preparation and Properties of Shape Memory PEG/IEM Resin and Its Composite Designed for Ureter Stent

A Multiple Remotely Controlled Platform from Recyclable Polyurethane Composite Network with Shape‐Memory Effect and Self‐Healing Ability

Contact Info

Product

Resources

About