Reversible shape change structures by grayscale pattern 4D printing

Wu, Jiangtao; Zhao, Zeang; Xiao, Kun; Hamel, Craig M.; Fang, Daining; Hu, Qi

doi:10.1088/2399-7532/aac322

Cited by 80 publications

(64 citation statements)

References 40 publications

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“…An internal stress generated by swelling difference between different positions drove the flat sheet into a prescribed 3D shape. More recently, Wu et al extended the grayscale curing to printing 3D structures by DLP printing. Figure d shows the digital design of a flower with outside surface of RGB 255 and inside surface of RGB 108 for each petal.…”

Section: D Printing By Multimaterials and Compositesmentioning

confidence: 99%

“…d) Blossom of a printed grayscale printed flower: the DLP printed flower structure using grayscale light (purple color representing RGB 255 and green color representing RGB 108) blossomed after desolvation and recovered after swelling in acetone. Reproduced with permission . Copyright 2018, IOP Publishing Ltd.…”

Section: D Printing By Multimaterials and Compositesmentioning

confidence: 99%

“…In addition, a two‐stage curing approach has been combined with DLP to make engineering polymers . Moreover, multimaterial DLP is also gaining some progress using switchable vats or grayscale light …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Advances in 4D Printing: Materials and Applications

Xiao

Roach

et al. 2018

Adv Funct Materials

Self Cite

700

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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Section: D Printing By Multimaterials and Compositesmentioning

confidence: 99%

Section: D Printing By Multimaterials and Compositesmentioning

confidence: 99%

See 1 more Smart Citation

Advances in 4D Printing: Materials and Applications

Xiao

Roach

et al. 2018

Adv Funct Materials

Self Cite

700

436

View full text Add to dashboard Cite

show abstract

“…The stimulus-induced force was expressed using eqn (17). 60 f S ¼ EAgða; SÞ½ À1 0 0 0 0 0 1 0 0 0 0 0 T…”

Section: Modeling and Simulation Of The 4d Printed Smart Materials Usmentioning

confidence: 99%

An insight into biomimetic 4D printing

et al. 2019

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“…Based on Equations and , the calculated E c and D p are 0.394 J cm −2 and 0.285 mm, respectively. In addition, fixed the exposure density of 5.0 J cm −2 , and based on the relations of exposure energy ( E ), exposure time ( t ), and light intensity ( I ), the cured depth is also increased with a ln function with the exposure time increasing (Figure b), indicating a superior light transmission of the liquid inks, and then the cured films would weaken the exposure energy. In short, these data indicate that the photocuring inks have a superior curability that can meet the requirements of the DLP 3D printing.…”

mentioning

confidence: 99%

3D Printing of Photocuring Elastomers with Excellent Mechanical Strength and Resilience

Zhang

Yan

et al. 2019

Macromol. Rapid Commun.

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Three‐dimensional (3D) printing elastomers, as a combination of transformative technology and widely used materials, have received great demand in many fields. However, commercial photocuring elastomer inks for 3D printing usually exhibit poor mechanical strength, inferior resilience, and lower elongation at break. In this study, photocuring inks that can be employed for digital light processing 3D printing are developed with acryloyl‐modified polyethylene glycol (Acryl@PEG). The resultant photocuring inks exhibit not only high tensile strength of 14.1 MPa and elongation of 245.0%, but also excellent resilience (recover to 90.85% after 30 min under the 200% strain). With the photocuring elastomer inks, a variety of architectures including hollow vases, eggs, finger rings, and porous lattices are built with excellent precision, which all could experience large shape deformations repeatedly without any damage, indicating the excellent elasticity, outstanding shape‐recovery property, and mechanical stability. The present photocuring elastomer inks for 3D printing are therefore believed to be promising for soft robots, wearable devices, flexible electronics, and many other applications.

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Reversible shape change structures by grayscale pattern 4D printing

Cited by 80 publications

References 40 publications

Advances in 4D Printing: Materials and Applications

Advances in 4D Printing: Materials and Applications

An insight into biomimetic 4D printing

3D Printing of Photocuring Elastomers with Excellent Mechanical Strength and Resilience

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