Synthesis of Self‐healing and Light‐, Thermal‐, and Humidity‐induced Deformative Polyurethane Actuator

Dong, Chen; Yue, Xiaolei; Zhang, Yaodu; Wang, Yucheng; Ren, Zhi‐Hui; Guan, Zheng‐Hui

doi:10.1002/marc.202300281

Cited by 11 publications

(3 citation statements)

References 42 publications

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“…In addition, soft robots can achieve desired applications in a controllable manner without coupling additional instruments, e.g., clamping [8][9][10], crawling [11][12][13], and rolling [14,15]. Currently, the driving structure of soft robots can convert external stimuli, e.g., light [16][17][18], electricity [19,20], magnetism [21], pH [22], temperature [23][24][25], and humidity [26][27][28], into mechanical ene.g., thereby resulting in macroscopic two-dimensional (2D) or three-dimensional (3D) shape changes. Among these external stimuli, light-driven actuation, where light energy can be converted to mechanical ene.g., is considered the best choice to realize small, unconstrained, and bionic stimuli-responsive soft actuators due to some unique properties.…”

Section: Introductionmentioning

confidence: 99%

Light-Responsive Soft Robot Integrating Actuation and Function Based on Laser Cutting

Jia,

Liu,

Zhang

et al. 2024

Micromachines

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Soft robots with good deformability and adaptability have important prospects in the bionics and intelligence field. However, current research into soft robots is primarily limited to the study of actuators and ignores the integrated use of functional devices and actuators. To enrich the functions of soft robots and expand their application fields, it is necessary to integrate various functional electronic devices into soft robots to perform diverse functions during dynamic deformation. Therefore, this paper discusses methods and strategies to manufacture optical stimuli-responsive soft actuators and integrate them into functional devices for soft robots. Specifically, laser cutting allows us to fabricate an optically responsive actuator structure, e.g., the curling direction can be controlled by adjusting the direction of the cutting line. Actuators with different bending curvatures, including nonbending, can be obtained by adjusting the cutting depth, cutting width, and the spacing of the cutting line, which makes it easy to obtain a folded structure. Thus, various actuators with complex shape patterns can be obtained. In addition, we demonstrate a fabrication scheme for a worm-like soft robot integrated with functional devices (LEDs are used in this paper). The local nonbending design provides an asymmetric structure that provides driving power and avoids damage to the functional circuit caused by the large deformation during movement. The integration of drive and function provides a new path for the application of soft robots in the intelligence and bionics field.

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Section: Introductionmentioning

confidence: 99%

Light-Responsive Soft Robot Integrating Actuation and Function Based on Laser Cutting

Jia,

Liu,

Zhang

et al. 2024

Micromachines

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“…Polyurethane elastomers (PUEs) have demonstrated good application prospects in many fields such as stretchable electronic devices, [ 1,2 ] soft robots, [ 3,4 ] biomedicine, [ 5 ] and protective materials [ 6 ] due to their flexible structural design and widely adjustable performance. However, because of the multiplicity and complexity of usage scenarios, the performance of traditional PUEs will rapidly decline or even fail when the material is subjected to external force.…”

Section: Introductionmentioning

confidence: 99%

Self‐Healing Polyurethane Elastomers with Superior Tensile Strength and Elastic Recovery Based on Dynamic Oxime‐Carbamate and Hydrogen Bond Interactions

Wang,

Liu

et al. 2024

Macromol. Rapid Commun.

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The preparation of self‐healing polyurethane elastomers (PUEs) incorporating dynamic bonds is of considerable practical significance. However, developing a PUE with outstanding mechanical properties and high self‐healing efficiency poses a significant challenge. Herein, we have successfully developed a series of self‐healing PUEs with various outstanding properties through rational molecular design. These PUEs incorporate m‐xylylene diisocyanate and reversible dimethylglyoxime as hard segment, along with polytetramethylene ether glycol as soft segment. A significant amount of dynamic oxime‐carbamate and hydrogen bonds are formed in hard segment. The microphase separated structure of the PUEs enables them to be colorless with a transparency of > 90%. Owing to the chemical composition and multiple dynamic interactions, the PUEs were endowed with ultra‐high tensile strength of 34.5 MPa, satisfactory toughness of 53.9 MJ m−3, and great elastic recovery both at low and high strains. The movement of polymer molecular chains and the dynamic reversible interactions render a self‐healing efficiency of 101% at 70 °C. In addition, this self‐healing polyurethane could still maintain high mechanical properties after recycling. This study provides a design strategy for the preparation of a comprehensive polyurethane with superior overall performance, which holds wide application prospects in the fields of flexible displays and solar cells.This article is protected by copyright. All rights reserved

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“…In this context, polyurethane elastomers can be engineered to modulate the stiffness of the material at the hard segments and the flexibility of the material at the soft phase due to their microphase-separated structure. 43,44 Modulating the soft and hard segments of polyurethanes may lead to the realization of a photochromic polyurethane material that is capable of self-healing with high sensitivity and strength. 45−47 However, there have been no reports of this phenomenon in the literature.…”

Section: Introductionmentioning

confidence: 99%

High Strength Photochromic Polyurethane with Self-Healing Abilities for Application as UV Detector

Zhang,

Cui,

Zhang

et al. 2024

ACS Appl. Polym. Mater.

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Photochromic materials have attracted considerable attention due to their potential applications in information encryption, intelligent sensors, and environmental monitoring. However, the preparation of photochromic materials with self-healing properties and high strength still poses significant challenges. Herein, a photochromic polyurethane (RBPU-8) with self-healing properties and high strength was synthesized by copolymerizing 2,6-pyridinedimethanol (PDM), boric acid (BA), poly(tetrahydrofuran) 1000 (PTMEG 1000), isophorone diisocyanate (IPDI), and N-(rhodamine-B) lactam-1,2-ethylenediamine (RBNH2). The RBPU-8 photochromic elastomer not only shows a sensitive light response rate and excellent self-healing efficiency (93%) but also exhibits superior mechanical strength (45.5 MPa), high toughness (231.5 MJ m–3), and good fracture energy (188.7 KJ m–2). In addition, multiple recyclable stickers and wearable devices based on RBPU-8 elastomer materials were successfully fabricated for UV detection and prevention.

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Synthesis of Self‐healing and Light‐, Thermal‐, and Humidity‐induced Deformative Polyurethane Actuator

Cited by 11 publications

References 42 publications

Light-Responsive Soft Robot Integrating Actuation and Function Based on Laser Cutting

Light-Responsive Soft Robot Integrating Actuation and Function Based on Laser Cutting

Self‐Healing Polyurethane Elastomers with Superior Tensile Strength and Elastic Recovery Based on Dynamic Oxime‐Carbamate and Hydrogen Bond Interactions

High Strength Photochromic Polyurethane with Self-Healing Abilities for Application as UV Detector

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