Sustainable 3D printing by reversible salting-out effects with aqueous salt solutions DOI Creative Commons
Donghwan Ji, Joseph Liu, Jiayu Zhao

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: May 9, 2024

Abstract Achieving a simple yet sustainable printing technique with minimal instruments and energy remains challenging. Here, facile 3D is developed by utilizing reversible salting-out effect. The effect induced aqueous salt solutions lowers the phase transition temperature of poly(N-isopropylacrylamide) (PNIPAM) to below 10 °C. It enables spontaneous instant formation physical crosslinks within PNIPAM chains at room temperature, thus allowing solution solidify upon contact solution. are extrudable through needles can immediately ions, preserving printed structures, without rheological modifiers, chemical crosslinkers, additional post-processing steps/equipment. crosslinking de-crosslinking polymer demonstrate recyclability polymeric ink. This approach extends various PNIPAM-based composite incorporating functional materials or other polymers, which offers great potential for developing water-soluble disposable electronic circuits, carriers delivering small materials, smart actuators.

Language: Английский

4D printing of shape memory polymer composites: A review on fabrication techniques, applications, and future perspectives DOI
Muhammad Yasir Khalid, Zia Ullah Arif,

Reza Noroozi

et al.

Journal of Manufacturing Processes, Journal Year: 2022, Volume and Issue: 81, P. 759 - 797

Published: July 25, 2022

Language: Английский

Citations

224
Deep Learning in Mechanical Metamaterials: From Prediction and Generation to Inverse Design DOI Open Access
Xiaoyang Zheng, Xubo Zhang, Ta‐Te Chen

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(45)

Published: June 19, 2023

Abstract Mechanical metamaterials are meticulously designed structures with exceptional mechanical properties determined by their microstructures and constituent materials. Tailoring material geometric distribution unlocks the potential to achieve unprecedented bulk functions. However, current metamaterial design considerably relies on experienced designers' inspiration through trial error, while investigating responses entails time‐consuming testing or computationally expensive simulations. Nevertheless, recent advancements in deep learning have revolutionized process of metamaterials, enabling property prediction geometry generation without prior knowledge. Furthermore, generative models can transform conventional forward into inverse design. Many studies implementation highly specialized, pros cons may not be immediately evident. This critical review provides a comprehensive overview capabilities prediction, generation, metamaterials. Additionally, this highlights leveraging create universally applicable datasets, intelligently intelligence. article is expected valuable only researchers working but also those field materials informatics.

Language: Английский

Citations

122
3D‐Printed Photoresponsive Liquid Crystal Elastomer Composites for Free‐Form Actuation DOI Creative Commons
Yuchen Wang, Rui Yin, Lishuai Jin

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(4)

Published: Nov. 11, 2022

Abstract Direct ink writing of liquid crystal elastomers (LCEs) offers a new opportunity to program geometries for wide variety shape transformation modes toward applications such as soft robotics. So far, most 3D‐printed LCEs are thermally actuated. Herein, 3D‐printable photoresponsive gold nanorod (AuNR)/LCE composite is developed, allowing photothermal actuation the structures with AuNR low 0.1 wt.%. It shown that printed filament has superior response 27% strain upon irradiation near‐infrared (NIR) light (808 nm) at 1.4 W cm −2 (corresponding 160 °C) under optimal printing conditions. The can be globally or locally actuated into different shapes by controlling area exposed NIR laser. Taking advantage customized enabled 3D and ability control light, light‐responsive robot demonstrated climb on ratchet surface maximum speed 0.284 mm s −1 (on flat surface) 0.216 30° titled surface), respectively, corresponding 0.428 0.324 body length per min, large mass (0.23 g) thickness (1 mm).

Language: Английский

Citations

115
Bioinspired hydrogel actuator for soft robotics: Opportunity and challenges DOI

Yunrui Chen,

Yabin Zhang, Hongyuan Li

et al.

Nano Today, Journal Year: 2023, Volume and Issue: 49, P. 101764 - 101764

Published: Jan. 31, 2023

Language: Английский

Citations

111
Recent Advances in 4D Printing of Liquid Crystal Elastomers DOI
Mei Chen, Ming Gao, Lichun Bai

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(23)

Published: Dec. 3, 2022

Liquid crystal elastomers (LCEs) are renowned for their large, reversible, and anisotropic shape change in response to various external stimuli due lightly cross-linked polymer networks with an oriented mesogen direction, thus showing great potential applications robotics, bio-medics, electronics, optics, energy. To fully take advantage of the stimuli-responsive behaviors LCEs, it is preferable achieve a locally controlled alignment into monodomain orientations. In recent years, application 4D printing LCEs opens new doors simultaneously programming 3D geometry, offering more opportunities higher feasibility fabrication 4D-printed LCE objects desirable properties. Here, state-of-the-art advances reviewed, emphasis on both mechanisms applications. First, fundamental properties working principles representative techniques briefly introduced. Then, by advantages over conventional manufacturing methods demonstrated. Finally, perspectives current challenges development trends toward discussed, which may shed light future research directions this field.

Language: Английский

Citations

105
4D printing: Technological developments in robotics applications DOI
Muhammad Yasir Khalid, Zia Ullah Arif, Waqas Ahmed

et al.

Sensors and Actuators A Physical, Journal Year: 2022, Volume and Issue: 343, P. 113670 - 113670

Published: June 10, 2022

Language: Английский

Citations

102
Robust integration of polymerizable perovskite quantum dots with responsive polymers enables 4D-printed self-deployable information display DOI Creative Commons
Xiao Yang,

Cristian Valenzuela,

Xuan Zhang

et al.

Matter, Journal Year: 2023, Volume and Issue: 6(4), P. 1278 - 1294

Published: March 3, 2023

Language: Английский

Citations

74
3D printing of magneto-active smart materials for advanced actuators and soft robotics applications DOI Creative Commons
Muhammad Yasir Khalid, Zia Ullah Arif, Ali Tariq

et al.

European Polymer Journal, Journal Year: 2024, Volume and Issue: 205, P. 112718 - 112718

Published: Jan. 2, 2024

In the contemporary era, novel manufacturing technologies like additive (AM) have revolutionized different engineering sectors including biomedical, aerospace, electronics, etc. Four-dimensional (4D) printing aka AM of smart materials is gaining popularity among scientific community, which has excellent ability to make soft structures such as robots, actuators, and grippers. These are developed by applying various stimuli pH, temperature, magnetic field, many combinations onto materials. Stimuli in 3D permit shape-morphing behaviors bending, twisting, folding, swelling, rolling, shrinking, origami, or locomotion. A wide variety can be fabricated through incorporation hard particles into resulting magneto-active (MASMs). With this integration, magneto-thermal coupling actuation allows diverse magneto-deformations, facilitating development personalized devices that capable enhanced deformation. review, guidelines provided on for MASMs polymers (MAPs), composites, hydrogels (MAHs) booming flexible wearable biomimetic devices. Moreover, 3D-printed robotics an outstanding capacity adapt complicated situations advanced actuating applications. Finally, some current challenges emerging areas exciting technology been proposed. Lastly, it anticipated technological advancements developing intelligent will a significant impact design real-world

Language: Английский

Citations

74
3D printing of stimuli-responsive hydrogel materials: Literature review and emerging applications DOI Creative Commons
Zia Ullah Arif, Muhammad Yasir Khalid, Ali Tariq

et al.

Giant, Journal Year: 2023, Volume and Issue: 17, P. 100209 - 100209

Published: Nov. 15, 2023

Additive manufacturing (AM) aka three-dimensional (3D) printing has been a well-established and unparalleled technology, which is expanding the boundaries of materials science exhibiting an enormous potential to fabricate intricate geometries for healthcare, electronics, construction sectors. In contemporary era, combination AM technology stimuli-responsive hydrogels (SRHs) helps create dynamic functional structures with extreme accuracy, are capable changing their shape, functional, or mechanical properties in response environmental cues such as humidity, heat, light, pH, magnetic field, electric etc. 3D SRHs permits creation on-demand dynamically controllable shapes excellent control over various self-repair, self-assembly, multi-functionality, These accelerate researchers think unthinkable applications. Additively manufactured objects have shown applications like tissue engineering, drug delivery, soft robots, sensors, other biomedical devices. The current review provides recent progress SRHs, more focus on techniques, stimuli mechanisms, shape morphing behaviors, Finally, trends future roadmap additively smart different also presented, will be helpful research. This holds great promise providing fundamental knowledge about diverse

Language: Английский

Citations

71
Mechanochromic and ionic conductive cholesteric liquid crystal elastomers for biomechanical monitoring and human–machine interaction DOI

Jiazhe Ma,

Jiajia Yang, Xuan Zhang

et al.

Materials Horizons, Journal Year: 2023, Volume and Issue: 11(1), P. 217 - 226

Published: Oct. 20, 2023

Ionic conductive cholesteric liquid crystal elastomers with dynamic color-changing and electrical sensing functions were developed through the integration of polymer ionic networks.

Language: Английский

Citations

55