Photoresponsive hydrogel-based soft robot: A review

Jiang, Jingang; Xu, Shuainan; Ma, Hongwei; Li, Changpeng; Huang, Zhiyuan

doi:10.1016/j.mtbio.2023.100657

Cited by 16 publications

(1 citation statement)

References 137 publications

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“…Hydrogels, recognized as soft materials in the field of materials science, are threedimensional (3D) cross-linked polymer networks with the remarkable capability of absorbing and retaining a substantial amount of water [1][2][3][4][5][6][7]. The significant attention hydrogels have received is due to their high water content and the related potential they hold for numerous biomedical applications, including tissue engineering [8][9][10][11][12], soft robotics [13][14][15][16][17], wearable devices [18][19][20][21], personal care [22][23][24], and more. Hydrogels are commonly prepared using both synthetic and natural polymers.…”

Section: Introductionmentioning

confidence: 99%

Stretchable, Adhesive, and Biocompatible Hydrogel Based on Iron–Dopamine Complexes

Lee,

Huang,

Wang

et al. 2023

Polymers

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Hydrogels’ exceptional mechanical strength and skin-adhesion characteristics offer significant advantages for various applications, particularly in the fields of tissue adhesion and wearable sensors. Herein, we incorporated a combination of metal-coordination and hydrogen-bonding forces in the design of stretchable and adhesive hydrogels. We synthesized four hydrogels, namely PAID-0, PAID-1, PAID-2, and PAID-3, consisting of acrylamide (AAM), N,N′-methylene-bis-acrylamide (MBA), and methacrylic-modified dopamine (DA). The impact of different ratios of iron (III) ions to DA on each hydrogel’s performance was investigated. Our results demonstrate that the incorporation of iron–dopamine complexes significantly enhances the mechanical strength of the hydrogel. Interestingly, as the DA content increased, we observed a continuous and substantial improvement in both the stretchability and skin adhesiveness of the hydrogel. Among the hydrogels tested, PAID-3, which exhibited optimal mechanical properties, was selected for adhesion testing on various materials. Impressively, PAID-3 demonstrated excellent adhesion to diverse materials and, combined with the low cytotoxicity of PAID hydrogel, holds great promise as an innovative option for biomedical engineering applications.

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Section: Introductionmentioning

confidence: 99%

Stretchable, Adhesive, and Biocompatible Hydrogel Based on Iron–Dopamine Complexes

Lee,

Huang,

Wang

et al. 2023

Polymers

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Muscle‐Inspired Super‐Flexible Phase Change Materials with Programmable Deformation for Photothermal Actuation

Geng,

Qin,

Shen

et al. 2024

Adv Funct Materials

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Phase change materials (PCMs) with remarkable latent heat storage/release capacity have demonstrated prominent advantages in energy conservation and efficient thermal management. Nevertheless, simultaneously achieving high thermal energy storage capacity, excellent toughness, and flexibility in PCMs is a significant challenge for programmable deformations when used in complex environmental scenarios. A flexible PCM is reported with programmable deformation constructed through a three‐dimensional (3D) dynamic cross‐linked network. This approach has culminated in the development of homogeneously cross‐linked and self‐supporting polyurethane‐based solid‐solid PCM with graphene enhancement, which exhibits exceptional properties of high latent heat storage/release capacity (∆Hm = 105.3 J g−1, ∆Hc = 105.0 J g−1), high toughness (ε = 1543%, σ = 19.2 MPa), excellent flexibility, and shape memory behavior (Rr = 90.3%). Notably, when subjected to photothermal stimulation, it can lift objects weighing more than 2620 times their weight, presenting a working density of 1330 kJ m−3. This flexible PCM, which simultaneously possesses a high latent capacity and photothermal‐driven performance, opens a new pathway for artificial muscles or soft robots with the requirements for energy conservation and thermal management in complex scenarios.

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Combined Photopolymerization and Localized Photochromism by Aza‐Diarylethene and Hemiindigo Synergy

Sacherer,

Dube

2024

Advanced Materials

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Molecular photoswitches produce light‐controlled changes at the nanometer scale and can therefore be used to alter the states and behavior of materials in a truly bottom‐up fashion. Here an escalating photonic complexity of material property control with light is shown using a recently developed aza‐diarylethene in combination with hemiindigo (HI) photoswitches. First, aza‐diarylethene can be used as a photoswitch in polystyrene (PS) to reversibly inscribe relief‐type 3D structures into PS. Second, aza‐diarylethene can further be used as a photoinitiator for light‐induced polymerization of methyl acrylate (MA), demonstrating for the first time light‐controlled chemical reactivity control with its zwitterionic switching state. Third, aza‐diarylethene and HIs are implemented into aza‐diarylethene polymerized MA, generating photochromic polymers. At the fourth level, a binary mixture allows to synergize aza‐diarylethene‐induced photopolymerization with localized photochromism changes of the simultaneously entrapped functional HI. With such multilevel light response, the utility of this particular photoswitch combination for applications in advanced photonic materials is demonstrated.

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Photoresponsive hydrogel-based soft robot: A review

Cited by 16 publications

References 137 publications

Stretchable, Adhesive, and Biocompatible Hydrogel Based on Iron–Dopamine Complexes

Stretchable, Adhesive, and Biocompatible Hydrogel Based on Iron–Dopamine Complexes

Muscle‐Inspired Super‐Flexible Phase Change Materials with Programmable Deformation for Photothermal Actuation

Combined Photopolymerization and Localized Photochromism by Aza‐Diarylethene and Hemiindigo Synergy

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