Fractal-Based Stretchable Circuits via Electric-Field-Driven Microscale 3D Printing for Localized Heating of Shape Memory Polymers in 4D Printing

2021 ◽  
Author(s):  
Yuan-Fang Zhang ◽  
Zhenghao Li ◽  
Hongke Li ◽  
Honggeng Li ◽  
Yi Xiong ◽  
...  
Keyword(s):  
3D Printing ◽  
Electric Field ◽  
Shape Memory ◽  
Shape Memory Polymers ◽  
4D Printing ◽  
Localized Heating ◽  
Stretchable Circuits

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.

scholarly journals Multimaterial 4D Printing with Tailorable Shape Memory Polymers

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Qi Ge ◽  
Amir Hosein Sakhaei ◽  
Howon Lee ◽  
Conner K. Dunn ◽  
Nicholas X. Fang ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymers ◽  
4D Printing

scholarly journals 3D Printing: 3D Printing of Shape Memory Polymers for Flexible Electronic Devices (Adv. Mater. 22/2016)

2016 ◽  
Vol 28 (22) ◽  
pp. 4166-4166 ◽  
Author(s):  
Matt Zarek ◽  
Michael Layani ◽  
Ido Cooperstein ◽  
Ela Sachyani ◽  
Daniel Cohn ◽  
...  
Keyword(s):  
3D Printing ◽  
Shape Memory ◽  
Electronic Devices ◽  
Shape Memory Polymers ◽  
Flexible Electronic ◽  
Flexible Electronic Devices

scholarly journals 4D printing: processability and measurement of recovery force in shape memory polymers

2016 ◽  
Vol 89 (5-8) ◽  
pp. 1827-1836 ◽  
Author(s):  
M. D. Monzón ◽  
R. Paz ◽  
E. Pei ◽  
F. Ortega ◽  
L. A. Suárez ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymers ◽  
4D Printing

scholarly journals Expandable drug delivery system for gastric retention based on shape memory polymers: Development via 4D printing and extrusion

2019 ◽  
Vol 571 ◽  
pp. 118700 ◽  
Author(s):  
Alice Melocchi ◽  
Marco Uboldi ◽  
Nicoletta Inverardi ◽  
Francesco Briatico-Vangosa ◽  
Francesco Baldi ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Shape Memory ◽  
Drug Delivery System ◽  
Delivery System ◽  
Shape Memory Polymers ◽  
Gastric Retention ◽  
4D Printing

4D printing of shape memory polymers

2020 ◽  
Vol 134 ◽  
pp. 109771 ◽  
Author(s):  
Alsha Subash ◽  
Balasubramanian Kandasubramanian
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymers ◽  
4D Printing

4D Printing of Complex Ceramic Structures via Controlling Zirconia Contents and Patterns

2021 ◽  
Author(s):  
Zhicheng Rong ◽  
Chang Liu ◽  
Yingbin Hu
Keyword(s):  
3D Printing ◽  
Shape Memory ◽  
Shape Change ◽  
Three Dimensional ◽  
Ceramic Materials ◽  
Full Potential ◽  
Sintering Process ◽  
4D Printing ◽  
3D Printed ◽  
Dynamic Components

Abstract In recent years, more and more attentions have been attracted on integrating three-dimensional (3D) printing with fields (such as magnetic field) or innovating new methods to reap the full potential of 3D printing in manufacturing high-quality parts and processing nano-scaled composites. Among all of newly innovated methods, four-dimensional (4D) printing has been proved to be an effective way of creating dynamic components from simple structures. Common feeding materials in 4D printing include shape memory hydrogels, shape memory polymers, and shape memory alloys. However, few attempts have been made on 4D printing of ceramic materials to shape ceramics into intricate structures, owing to ceramics’ inherent brittleness nature. Facing this problem, this investigation aims at filling the gap between 4D printing and fabrication of complex ceramic structures. Inspired by swelling-and-shrinking-induced self-folding, a 4D printing method is innovated to add an additional shape change of ceramic structures by controlling ZrO2 contents and patterns. Experimental results evidenced that by deliberately controlling ZrO2 contents and patterns, 3D-printed ceramic parts would undergo bending and twisting during the sintering process. To demonstrate the capabilities of this method, more complex structures (such as a flower-like structure) were fabricated. In addition, functional parts with magnetic behaviors were 4D-printed by incorporating iron into the PDMS-ZrO2 ink.

A Review on Development of Soft Gripper Using 4D Printing

2020 ◽  
Vol 5 (3) ◽  
pp. 49-55
Author(s):  
Ashutosh Singh ◽  
◽  
Ravi Butola ◽  
Jitendra Bhaskar ◽  
Keyword(s):  
3D Printing ◽  
Shape Memory ◽  
Advanced Materials ◽  
Soft Robotics ◽  
4D Printing ◽  
Silicone Elastomers ◽  
System Architectures ◽  
Shape Memory Materials ◽  
End Effectors ◽  
Future Work

Improvements in soft robotics, materials, and flexible gripper technology made it possible for the soft grippers to advance rapidly. A brief analysis of soft robotic grippers featuring various material collections, physical rules, and system architectures is provided here. Soft gripping is divided into three technologies, enabling gripping with: a) actuation, b) material used, and c) Use of 3D printing in fabricating grippers. An informative analysis is provided of every form. Similar to stiff grippers, flexible and elastic end-effectors may also grab or control a broader variety of objects. The inherent versatility of the materials is increasingly being used to study advanced materials and soft structures, particularly silicone elastomers, shape-memory materials, active polymers, and gels, in the development of compact, simple, and more versatile grippers. For future work, enhanced structures, techniques, and senses play a prominent part.

scholarly journals Vitrimer-Like Shape Memory Polymers: Characterization and Applications in Reshaping and Manufacturing

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2330
Author(s):  
Tao Xi Wang ◽  
Hong Mei Chen ◽  
Abhijit Vijay Salvekar ◽  
Junyi Lim ◽  
Yahui Chen ◽  
...  
Keyword(s):  
Solid State ◽  
3D Printing ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Memory Performance ◽  
Shape Memory Polymers ◽  
Cross Linking ◽  
Potential Applications ◽  
Actual Shape

The shape memory effect (SME) refers to the ability of a material to recover its original shape, but only in the presence of a right stimulus. Most polymers, either thermo-plastic or thermoset, can have the SME, although the actual shape memory performance varies according to the exact material and how the material is processed. Vitrimer, which is between thermoset and thermo-plastic, is featured by the reversible cross-linking. Vitrimer-like shape memory polymers (SMPs) combine the vitrimer-like behavior (associated with dissociative covalent adaptable networks) and SME, and can be utilized to achieve many novel functions that are difficult to be realized by conventional polymers. In the first part of this paper, a commercial polymer is used to demonstrate how to characterize the vitrimer-like behavior based on the heating-responsive SME. In the second part, a series of cases are presented to reveal the potential applications of vitrimer-like SMPs and their composites. It is concluded that the vitrimer-like feature not only enables many new ways in reshaping polymers, but also can bring forward new approaches in manufacturing, such as, rapid 3D printing in solid state on space/air/sea missions.

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