Remote Controlled Multishape Polymer Nanocomposites with Selective Radiofrequency Actuations

He, Zhengwang; Satarkar, Nitin S.; Xie, Tao; Cheng, Yang‐Tse; Hilt, J. Zach

doi:10.1002/adma.201100646

Cited by 197 publications

(146 citation statements)

References 26 publications

(37 reference statements)

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“…Shape memory polymers (SMPs), which are an important type of stimuli-responsive polymer, can recover their original shape upon exposure to external stimuli, such as heat [1], light [2][3][4], magnetic field [5,6], and moisture [7,8]. Owing to their prominent advantages, e.g., low density, high frozen strain, low manufacturing cost, easy processability, wide shape transition temperature, and partial biocompatibility, SMPs have wide potential applications, such as in actuators, sensors, and smart devices.…”

Section: Introductionmentioning

confidence: 99%

A molecular dynamics investigation of the deformation mechanism and shape memory effect of epoxy shape memory polymers

Yang

Wang

Guo

et al. 2016

Sci. China Phys. Mech. Astron.

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Following deformation, thermally induced shape memory polymers (SMPs) have the ability to recover their original shape with a change in temperature. In this work, the thermomechanical properties and shape memory behaviors of three types of epoxy SMPs with varying curing agent contents were investigated using a molecular dynamics (MD) method. The mechanical properties under uniaxial tension at different temperatures were obtained, and the simulation results compared reasonably with experimental data. In addition, in a thermomechanical cycle, ideal shape memory effects for the three types of SMPs were revealed through the shape frozen and shape recovery responses at low and high temperatures, respectively, indicating that the recovery time is strongly influenced by the ratio of E-51 to 4,4'-Methylenedianiline. H. Yang, Z. D. Wang, Y. F. Guo, and X. H. Shi, A molecular dynamics investigation of the deformation mechanism and shape memory effect of epoxy shape memory polymers, Sci.

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Section: Introductionmentioning

confidence: 99%

A molecular dynamics investigation of the deformation mechanism and shape memory effect of epoxy shape memory polymers

Yang

Wang

Guo

et al. 2016

Sci. China Phys. Mech. Astron.

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“…); light (photo-responsive, without apparent temperature fluctuation); and, mechanical force (mechano-responsive, including impact and pressure) [2][3][4][5][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Figurementioning

confidence: 99%

Mechanisms of the Shape Memory Effect in Polymeric Materials

et al. 2013

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Abstract:This review paper summarizes the recent research progress in the underlying mechanisms behind the shape memory effect (SME) and some newly discovered shape memory phenomena in polymeric materials. It is revealed that most polymeric materials, if not all, intrinsically have the thermo/chemo-responsive SME. It is demonstrated that a good understanding of the fundamentals behind various types of shape memory phenomena in polymeric materials is not only useful in design/synthesis of new polymeric shape memory materials (SMMs) with tailored performance, but also helpful in optimization of the existing ones, and thus remarkably widens the application field of polymeric SMMs.

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“…In general, the polymer's shape memory (SM) effect is described and evaluated in a thermo-temporal SM cycle, where the SMP is firstly deformed at a high temperature (usually above the glass transition or melting point) and subsequently frozen upon cooling to fix the programmed temporary shape. When an environmental stimulus is applied, the SMP could either provide recovery stresses or return to their permanent shapes, depending on whether or not the external loads still exist, namely the constrained or free recovery condition [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] . Since SMPs can sense the environmental changes and then take reactions in a predetermined sequence with deformation, they are considered as a promising alternative for the future's spontaneous shape changing and tunable components in various applications such as microelectromechanical systems, surface patterning, biomedical devices, aerospace deployable structures and morphing structures [31][32][33][34][35][36][37][38][39] .…”

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confidence: 99%

Reduced time as a unified parameter determining fixity and free recovery of shape memory polymers

2014

Nat Commun

231

179

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Shape memory polymers are at the forefront of recent materials research. Although the basic concept has been known for decades, recent advances in the research of shape memory polymers demand a unified approach to predict the shape memory performance under different thermo-temporal conditions. Here we report such an approach to predict the shape fixity and free recovery of thermo-rheologically simple shape memory polymers. The results show that the influence of programming conditions to free recovery can be unified by a reduced programming time that uniquely determines shape fixity, which consequently uniquely determines the shape recovery with a reduced recovery time. Furthermore, using the time-temperature superposition principle, shape recoveries under different thermo-temporal conditions can be extracted from the shape recovery under the reduced recovery time. Finally, a shape memory performance map is constructed based on a few simple standard polymer rheology tests to characterize the shape memory performance of the polymer.

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Remote Controlled Multishape Polymer Nanocomposites with Selective Radiofrequency Actuations

Cited by 197 publications

References 26 publications

A molecular dynamics investigation of the deformation mechanism and shape memory effect of epoxy shape memory polymers

A molecular dynamics investigation of the deformation mechanism and shape memory effect of epoxy shape memory polymers

Mechanisms of the Shape Memory Effect in Polymeric Materials

Reduced time as a unified parameter determining fixity and free recovery of shape memory polymers

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