Two-Way 4D Printing: A Review on the Reversibility of 3D-Printed Shape Memory Materials

Lee, Amelia Yilin; An, Jia; Chua, Chee Kai

doi:10.1016/j.eng.2017.05.014

Cited by 245 publications

(133 citation statements)

References 121 publications

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“…In addition, SMPs characterized by water-induced shape memory behavior and suitable thermoplastic properties could be subjected to hot-processing via forming manufacturing techniques, such as hot melt extrusion (HME), injection molding and fused deposition modeling (FDM) 3D printing, which are well-known to yield high versatile geometries, details and sizes of products. Notably, the combined use of 3D printing technologies and SMPs has recently led to the new concept of 4D printing, intended as fabrication via 3D printing of items capable of selftransforming after production in terms of morphology, and thus possibly of functionality, in response to an external stimulus (Ding et al, 2017, Gao et al, 2016, Lee et al, 2017Maniruzzamann 2018).…”

Section: Introductionmentioning

confidence: 99%

Retentive device for intravesical drug delivery based on water-induced shape memory response of poly(vinyl alcohol): design concept and 4D printing feasibility

Melocchi

Inverardi

Uboldi

et al. 2019

International Journal of Pharmaceutics

145

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Section: Introductionmentioning

confidence: 99%

Retentive device for intravesical drug delivery based on water-induced shape memory response of poly(vinyl alcohol): design concept and 4D printing feasibility

Melocchi

Inverardi

Uboldi

et al. 2019

International Journal of Pharmaceutics

145

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“…The thermal transition of SMPs is due to molecular switches/ net points that are physical and chemical crosslinks. Phasesegregated morphology and formation are the foundational mechanism behind the state of material change [25]. In thermosets, the network chains between net points consist of switch segments of chemical crosslinks.…”

Section: Characteristics Of Smpsmentioning

confidence: 99%

“…The methods that can be used to print thermo-responsive SMPs include material extrusion, material jetting, and stereolithography. As for chemo-responsive SMPs, usually hydrogels are used and bio-extrusion is the most common method of fabrication [25].…”

Section: Characteristics Of Smpsmentioning

confidence: 99%

A taxonomy of shape-changing behavior for 4D printed parts using shape-memory polymers

Nam

Pei

2019

Prog Addit Manuf

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4D printing (4DP) combines the use of additive manufacturing (AM) to produce freeform components with stimuli-responsive materials, so that the printed parts can transform over a calculated duration of time. This paper provides a collective review of the transformational behavior of 4D printed parts that can be achieved using shape-memory polymers (SMPs). Using the process of 4DP, flat-packed structures can be printed and activated by external stimuli to transform into fully deployed functional structures. The paper provides designers and engineers with an understanding of the possibilities of shape-changing behaviors that can be realized using 4DP, where examples of existing work are referenced. From this knowledge, designers and engineers are able to implement suitable design strategies using computer-aided-design (CAD) to better control the shape-change behavior. We summarize our findings using a taxonomy of shape-changing behaviors that can be categorized according to basic, complex, and combined behaviors.

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“…In this sense, 4D printing has greatly accelerated the smart material and structure research. There are various review papers of 4D printing with different focuses . In this paper, we review the major advances in 4D printing of polymeric materials from the materials standpoint and their potential applications.…”

Section: Introductionmentioning

confidence: 99%

Advances in 4D Printing: Materials and Applications

Xiao

Roach

et al. 2018

Adv Funct Materials

735

436

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4D printing has attracted tremendous interest since its first conceptualization in 2013. 4D printing derived from the fast growth and interdisciplinary research of smart materials, 3D printer, and design. Compared with the static objects created by 3D printing, 4D printing allows a 3D printed structure to change its configuration or function with time in response to external stimuli such as temperature, light, water, etc., which makes 3D printing alive. Herein, the material systems used in 4D printing are reviewed, with emphasis on mechanisms and potential applications. After a brief overview of the definition, history, and basic elements of 4D printing, the state‐of‐the‐art advances in 4D printing for shape‐shifting materials are reviewed in detail. Both single material and multiple materials using different mechanisms for shape changing are summarized. In addition, 4D printing of multifunctional materials, such as 4D bioprinting, is briefly introduced. Finally, the trend of 4D printing and the perspectives for this exciting new field are highlighted.

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Two-Way 4D Printing: A Review on the Reversibility of 3D-Printed Shape Memory Materials

Cited by 245 publications

References 121 publications

Retentive device for intravesical drug delivery based on water-induced shape memory response of poly(vinyl alcohol): design concept and 4D printing feasibility

Retentive device for intravesical drug delivery based on water-induced shape memory response of poly(vinyl alcohol): design concept and 4D printing feasibility

A taxonomy of shape-changing behavior for 4D printed parts using shape-memory polymers

Advances in 4D Printing: Materials and Applications

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