Ferromagnetic soft continuum robots

Science Robotics, Journal Year: 2019, Volume and Issue: 4(33)

Published: Aug. 21, 2019

A submillimeter-scale, soft continuum robot navigates through highly constrained environments by steering based on magnetic actuation.

Language: Английский

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Hydrogel machines

Materials Today, Journal Year: 2020, Volume and Issue: 36, P. 102 - 124

Published: Jan. 28, 2020

Language: Английский

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Hydrogel Adhesion: A Supramolecular Synergy of Chemistry, Topology, and Mechanics

Advanced Functional Materials, Journal Year: 2019, Volume and Issue: 30(2)

Published: April 10, 2019

Abstract Adhering hydrogels to various materials is fundamental a large array of established and emerging applications. The last few years have seen transformative advances in achieving strong hydrogel adhesion, which supramolecular phenomenon. Two adherends connect through covalent bonds, noncovalent complexes, polymer chains, networks, or nanoparticles. Separating the dissipates energy cascading events across length scales, including bond cleavage, chain retraction, bulk hysteresis. A unifying principle has emerged: adhesion requires synergy chemistry topology connection, mechanics dissipation. This characterizes (another hydrogel, tissue, elastomer, plastic, metal, glass, ceramic) operations (cast, coat, print, attach, pierce, glue). Strong can be made permanent, reversible, degradable, on‐demand detachable. development its applications adheres disciplines, discovers interlinks, forges cohesion. Discussed throughout review are immediate opportunities for studies practical

Language: Английский

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Soft Materials by Design: Unconventional Polymer Networks Give Extreme Properties

Chemical Reviews, Journal Year: 2021, Volume and Issue: 121(8), P. 4309 - 4372

Published: April 12, 2021

Hydrogels are polymer networks infiltrated with water. Many biological hydrogels in animal bodies such as muscles, heart valves, cartilages, and tendons possess extreme mechanical properties including being extremely tough, strong, resilient, adhesive, fatigue-resistant. These also critical for hydrogels' diverse applications ranging from drug delivery, tissue engineering, medical implants, wound dressings, contact lenses to sensors, actuators, electronic devices, optical batteries, water harvesters, soft robots. Whereas numerous have been developed over the last few decades, a set of general principles that can rationally guide design using different materials fabrication methods various remain central need field materials. This review is aimed at synergistically reporting: (i) achieve physical properties, (ii) implementation strategies unconventional networks, (iii) future directions orthogonal multiple combined mechanical, physical, chemical, properties. Because these based on generic they applicable other elastomers organogels. Overall, will not only provide comprehensive systematic guidelines rational materials, but provoke interdisciplinary discussions fundamental question: why does nature select constitute major parts bodies?

Language: Английский

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Translational Applications of Hydrogels

Chemical Reviews, Journal Year: 2021, Volume and Issue: 121(18), P. 11385 - 11457

Published: May 3, 2021

Advances in hydrogel technology have unlocked unique and valuable capabilities that are being applied to a diverse set of translational applications. Hydrogels perform functions relevant range biomedical purposes-they can deliver drugs or cells, regenerate hard soft tissues, adhere wet prevent bleeding, provide contrast during imaging, protect tissues organs radiotherapy, improve the biocompatibility medical implants. These make hydrogels useful for many distinct pressing diseases conditions even less conventional areas such as environmental engineering. In this review, we cover major hydrogels, with focus on novel benefits injectable how they relate applications medicine environment. We pay close attention development contemporary requires extensive interdisciplinary collaboration accomplish highly specific complex biological tasks from cancer immunotherapy tissue engineering vaccination. complement our discussion preclinical clinical mechanical design considerations needed scaling technologies application. anticipate readers will gain more complete picture expansive possibilities practical impactful differences across numerous fields

Language: Английский

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Muscle-like fatigue-resistant hydrogels by mechanical training

Proceedings of the National Academy of Sciences, Journal Year: 2019, Volume and Issue: 116(21), P. 10244 - 10249

Published: May 8, 2019

Skeletal muscles possess the combinational properties of high fatigue resistance (1,000 J/m2), strength (1 MPa), low Young's modulus (100 kPa), and water content (70 to 80 wt %), which have not been achieved in synthetic hydrogels. The muscle-like are highly desirable for hydrogels' nascent applications load-bearing artificial tissues soft devices. Here, we propose a strategy mechanical training achieve aligned nanofibrillar architectures skeletal hydrogels, resulting properties. These obtained through training-induced alignment nanofibrils, without additional chemical modifications or additives. In situ confocal microscopy fracturing processes reveals that results from crack pinning by require much higher energy fracture than corresponding amorphous polymer chains. This is particularly applicable 3D-printed microstructures can isotropically fatigue-resistant, strong yet compliant

Language: Английский

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Recent advances in conductive hydrogels: classifications, properties, and applications

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 52(2), P. 473 - 509

Published: Dec. 9, 2022

Hydrogel-based conductive materials for smart wearable devices have attracted increasing attention due to their excellent flexibility, versatility, and outstanding biocompatibility. This review presents the recent advances in multifunctional hydrogels electronic devices. First, with different components are discussed, including pure single network based on polymers, additional additives (i.e., nanoparticles, nanowires, nanosheets), double additives. Second, a variety of functionalities, self-healing, super toughness, self-growing, adhesive, anti-swelling, antibacterial, structural color, hydrophobic, anti-freezing, shape memory external stimulus responsiveness introduced detail. Third, applications flexible illustrated strain sensors, supercapacitors, touch panels, triboelectric nanogenerator, bioelectronic devices, robot). Next, current challenges facing summarized. Finally, an imaginative but reasonable outlook is given, which aims drive further development future.

Language: Английский

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3D printing of highly stretchable hydrogel with diverse UV curable polymers

Science Advances, Journal Year: 2021, Volume and Issue: 7(2)

Published: Jan. 6, 2021

This article proposes an approach of 3D printing structures consisting stretchable hydrogels bonded with UV curable polymers.

Language: Английский

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Healable, Degradable, and Conductive MXene Nanocomposite Hydrogel for Multifunctional Epidermal Sensors

ACS Nano, Journal Year: 2021, Volume and Issue: 15(4), P. 7765 - 7773

Published: March 26, 2021

Conductive hydrogels have emerged as promising material candidates for epidermal sensors due to their similarity biological tissues, good wearability, and high accuracy of information acquisition. However, it is difficult simultaneously achieve conductive hydrogel-based with reliable healability long-term usage, robust mechanical property, environmental degradability decreased electronic waste, sensing capability the physiological stimuli electrophysiological signals. Herein, we propose synthesis strategy a multifunctional sensor based on highly stretchable, self-healing, degradable, biocompatible nanocomposite hydrogel, which fabricated from conformal coating MXene (Ti3C2Tx) network by hydrogel polymer networks involving poly(acrylic acid) amorphous calcium carbonate. The can be employed sensitively detect human motions fast response time (20 ms) serve skins wirelessly monitoring signals (such electromyogram electrocardiogram signals). Meanwhile, could degraded in phosphate buffered saline solution, not cause any pollution environment. This line research work sheds light fabrication healable, signal-sensitive potential applications human–machine interactions, healthy diagnosis, smart robot prosthesis devices.

Language: Английский

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Hydrogel interfaces for merging humans and machines

Nature Reviews Materials, Journal Year: 2022, Volume and Issue: 7(12), P. 935 - 952

Published: Oct. 13, 2022

Language: Английский

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