Mechanisms of multi-shape memory effects and associated energy release in shape memory polymers

Soft Matter ◽  
2012 ◽  
Vol 8 (20) ◽  
pp. 5687 ◽  
Author(s):  
Kai Yu ◽  
Tao Xie ◽  
Jinsong Leng ◽  
Yifu Ding ◽  
H. Jerry Qi
Keyword(s):  
Shape Memory ◽  
Energy Release ◽  
Shape Memory Polymers ◽  
Memory Effects ◽  
Shape Memory Effects

scholarly journals Harnessing reversible dry adhesion using shape memory polymer microparticles

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19616-19622
Author(s):  
Wenbing Li ◽  
Junhao Liu ◽  
Wanting Wei ◽  
Kun Qian
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
Memory Effects ◽  
Reversible Adhesion ◽  
Dry Adhesion ◽  
Bonding Property ◽  
Shape Memory Effects ◽  
Polymer Microparticles

Shape memory polymers can provide excellent bonding property because of their shape memory effects. This paper proposes an adhesive unit that is capable of repeatable smart adhesion and exhibits reversible adhesion under heating.

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 Numerical Analysis of Space Deployable Structure Based on Shape Memory Polymers

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 833
Author(s):  
Zepeng He ◽  
Yang Shi ◽  
Xiangchao Feng ◽  
Zhen Li ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Shape Memory ◽  
Large Scale ◽  
Shape Memory Polymers ◽  
Maxwell Model ◽  
Memory Effects ◽  
Space Structures ◽  
Future Research ◽  
Thermodynamic Behavior ◽  
Generalized Maxwell Model ◽  
Shape Memory Effects

Shape memory polymers (SMPs) have been applied in aerospace engineering as deployable space structures. In this work, the coupled finite element method (FEM) was established based on the generalized Maxwell model and the time–temperature equivalence principle (TTEP). The thermodynamic behavior and shape memory effects of a single-arm deployment structure (F-DS) and four-arm deployment structure (F-DS) based on SMPs were analyzed using the coupled FEM. Good consistency was obtained between the experimental data and simulation data for the tensile and S-DS recovery forces, verifying that the coupled FEM can accurately and reliably describe the thermodynamic behavior and shape memory effects of the SMP structure. The step-by-step driving structure is suitable for use as a large-scale deployment structure in space. This coupled FEM provides a new direction for future research on epoxy SMPs.

Triple-shape memory effects of bismaleimide based thermosetting polymer networks prepared via heterogeneous crosslinking structures

RSC Advances ◽  
2016 ◽  
Vol 6 (13) ◽  
pp. 10233-10241 ◽  
Author(s):  
Qiwei Zhang ◽  
Hongqiu Wei ◽  
Yanju Liu ◽  
Jinsong Leng ◽  
Shanyi Du
Keyword(s):  
Shape Memory ◽  
Polymer Networks ◽  
Shape Memory Polymers ◽  
Memory Effects ◽  
Shape Memory Effects ◽  
Thermosetting Polymer ◽  
Triple Shape Memory

A series of bismaleimide based triple shape memory polymers with heterogeneous crosslinking structures were synthesized, and their shape memory behaviours are characterized.

scholarly journals Structural multi-colour invisible inks with submicron 4D printing of shape memory polymers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Wang Zhang ◽  
Hao Wang ◽  
Hongtao Wang ◽  
John You En Chan ◽  
Hailong Liu ◽  
...  
Keyword(s):  
Shape Memory ◽  
Information Hiding ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
Photonic Devices ◽  
Temperature Sensitive ◽  
4D Printing ◽  
Two Photon ◽  
Shape Memory Effects ◽  
Nanoscale Structure

AbstractFour-dimensional (4D) printing of shape memory polymer (SMP) imparts time responsive properties to 3D structures. Here, we explore 4D printing of a SMP in the submicron length scale, extending its applications to nanophononics. We report a new SMP photoresist based on Vero Clear achieving print features at a resolution of ~300 nm half pitch using two-photon polymerization lithography (TPL). Prints consisting of grids with size-tunable multi-colours enabled the study of shape memory effects to achieve large visual shifts through nanoscale structure deformation. As the nanostructures are flattened, the colours and printed information become invisible. Remarkably, the shape memory effect recovers the original surface morphology of the nanostructures along with its structural colour within seconds of heating above its glass transition temperature. The high-resolution printing and excellent reversibility in both microtopography and optical properties promises a platform for temperature-sensitive labels, information hiding for anti-counterfeiting, and tunable photonic devices.

Multi-shape-memory effects in a wavelength-selective multicomposite

2015 ◽  
Vol 3 (26) ◽  
pp. 13953-13961 ◽  
Author(s):  
Li Yu ◽  
Qian Wang ◽  
Jian Sun ◽  
Chenyue Li ◽  
Cheng Zou ◽  
...  
Keyword(s):  
Shape Memory ◽  
Memory Effects ◽  
Shape Memory Effects

Tuneable shape-memory effects can be achieved in a wavelength-selective multicomposite.

Polyurethane foam/silica chemical hybrids for shape memory effects

2012 ◽  
Vol 27 (22) ◽  
pp. 2837-2843 ◽  
Author(s):  
S.M. Kang ◽  
M.J. Kim ◽  
S.H. Kwon ◽  
H. Park ◽  
H.M. Jeong ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polyurethane Foam ◽  
Memory Effects ◽  
Shape Memory Effects ◽  
Image Position

Abstract

scholarly journals Epoxy Resin Composite Bilayers with Triple-Shape Memory Effect

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Xixi Li ◽  
Yaofeng Zhu ◽  
Yubing Dong ◽  
Meng Liu ◽  
Qingqing Ni ◽  
...  
Keyword(s):  
Glass Transition ◽  
Electron Microscope ◽  
Shape Memory ◽  
Memory Effects ◽  
Epoxy Composites ◽  
Transition Temperatures ◽  
Glass Transition Temperatures ◽  
Shape Memory Effects ◽  
Triple Shape Memory ◽  
Nanosilica Particles

Triple-shape memory epoxy composites with bilayer structures of well-separated glass transition temperatures have been successfully prepared. The different glass transition temperatures of the epoxy composites were obtained by physically incorporating various amounts of nanosilica particles, which were introduced into the epoxy by utilizing polyethylene glycol. A scanning electron microscope and a transmission electron microscope were used to analyze the dispersibility of the nanosilica particles. The effects of nanosilica particles on the mechanical properties as well as on the dual-shape memory effects (DSME) and triple-shape memory effects (TSME) of the nanocomposites were studied. The nanosilica particles were homogenously dispersed in the matrix and well incorporated into the epoxy matrix. The resulting nanocomposites exhibited excellent TSME, and their shape fixity properties were significantly improved by nanosilica particles.

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