Super strong dopamine hydrogels with shape memory and bioinspired actuating behaviours modulated by solvent exchange

Huang, Jiahe; Liao, Jiexin; Wang, Tao; Sun, Weixiang; Tong, Zhen

doi:10.1039/c8sm00297e

Cited by 52 publications

(43 citation statements)

References 57 publications

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“…Traditionally, phenolic-based materials have been used as pigments, antioxidants, photographic developers, and inks. [70] However, in recent times, their broad range chemical properties and functions have made them useful precursors for constructing a range of smart, advanced materials including stimuli-responsive materials, [192,193] antibacterial and chemical-resistant materials, [194,195] superstructures, [128] unique polymeric materials, [196] DNA origami-based materials, [197] and other nanosystems. [198,199] Moreover, natural polyphenols have recently been shown to provide enhanced blood circulation after complexation with proteins.…”

Section: Applicationsmentioning

confidence: 99%

Phenolic Building Blocks for the Assembly of Functional Materials

et al. 2018

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Phenolic materials have long been known for their use in inks, wood coatings, and leather tanning. However, recently there has been a renewed interest in engineering advanced materials from phenolic building blocks. The intrinsic properties of phenolic compounds, such as metal chelation, hydrogen bonding, pH responsiveness, redox potentials, radical scavenging, polymerization, and light absorbance, have made them a distinct class of structural motifs for the synthesis of functional materials. Materials prepared from phenolic compounds often retain many of these useful properties with synergistic effects in applications ranging from catalysis to biomedicine. The present review provides an overview of the diverse functional materials that can be prepared from phenolic building blocks, bridging the various fields currently studying and using phenolic compounds. Natural and synthetic phenolic compounds are first discussed, followed by the assembly of functional materials. The engineered phenolic materials are grouped under three broad categories: thin films (e.g., metal-phenolic networks and polydopamine); particles (e.g., metal-organic frameworks and superstructures); and bulk materials (e.g., gels). Applications of phenolic-based materials are then presented, focusing mainly on mechanical (e.g., adhesives), biological (e.g., drug delivery), and environmental and energy (e.g., separation and catalysis) applications. Several examples of their emerging applications are also included. Finally, potential routes for the continued integration of disparate fields using phenolic building blocks and fundamental questions still requiring investigation are highlighted, and an outlook of the field is provided.

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Section: Applicationsmentioning

confidence: 99%

Phenolic Building Blocks for the Assembly of Functional Materials

et al. 2018

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“…Similar to electric fields, magnetic fields are clean and biocompatible even at clinically high field strengths. Thus, numerous examples of magnetically responsive hydrogels have been developed for various applications, including drug delivery and soft robots . Magnetically responsive NC gels could be prepared by the incorporation of magnetic NPs such as iron oxides (γ‐Fe 2 O 3 , Fe 3 O 4 ) into the hydrogel matrix.…”

Section: Properties Of Nanocomposite Hydrogelsmentioning

confidence: 99%

“…Artificial soft robots are flexible devices that can perform complex and programed motions driven by external commands. NC gels with controllable mechanical properties can convert diverse environmental stimuli, including temperature, light, humidity, phase and volume change, without structural failure, making them an ideal candidate for artificial soft robots that can perform macroscopic actuation by structure and shape transitions under external stimuli …”

Section: Applications Of Nanocomposite Hydrogelsmentioning

confidence: 99%

“…Thus, numerous examples of magnetically responsive hydrogels have been developed for various applications, including drug delivery and soft robots. [22,96,113,114] Magnetically responsive NC gels could be prepared by the incorporation of magnetic NPs such as iron oxides (γ-Fe 2 O 3 , Fe 3 O 4 ) into the hydrogel matrix. These NPs usually need to be modified with ligands or wrapped in polymer nanospheres to enable cross-linking with a hydrogel matrix.…”

Section: Magnetically Responsive Nc Gelsmentioning

confidence: 99%

“…NC gels with controllable mechanical properties can convert diverse environmental stimuli, including temperature, light, humidity, phase and volume change, without structural failure, making them an ideal candidate for artificial soft robots that can perform macroscopic actuation by structure and shape transitions under external stimuli. [11,112,113] For use in NC gels-based soft robots, NC gels with anisotropic structures, such as asymmetric structures, gradient structures, alignment structures, etc. must be fabricated.…”

Section: Soft Robotsmentioning

confidence: 99%

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Nanoparticle–Polymer Synergies in Nanocomposite Hydrogels: From Design to Application

Chen

Hou

Ren

et al. 2018

Macromol. Rapid Commun.

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Hydrogels are an important class of soft materials with high water retention that exhibit intelligent and elastic properties and have promising applications in the fields of biomaterials, soft machines, and artificial tissue. However, the low mechanical strength and limited functions of traditional chemically cross-linked hydrogels restrict their further applications. Natural materials that consist of stiff and soft components exhibit high mechanical strength and functionality. Among artificial soft materials, nanocomposite hydrogels are analogous to these natural materials because of the synergistic effects of nanoparticle (NP) polymers in hydrogels construction. In this article, the structural design and properties of nanocomposite hydrogels are summarized. Furthermore, along with the development of nanocomposite hydrogel-based devices, the shaping and potential applications of hydrogel devices in recent years are highlighted. The influence of the interactions between NPs and polymers on the dispersion as well as the structural stability of nanocomposite hydrogels is discussed, and the novel stimuli-responsive properties induced by the synergies between functional NPs and polymeric networks are reviewed. Finally, recent progress in the preparation and applications of nanocomposite hydrogels is highlighted. Interest in this field is growing, and the future and prospects of nanocomposite hydrogels are also reviewed.

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Ionic Conductive Organohydrogels with Dynamic Pattern Behavior and Multi‐Environmental Stability

Liu

Chen

et al. 2021

Adv Funct Materials

121

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Multi‐environmental tolerant hydrogels have received significant attention and are promising for application as smart materials in multiple environments (e.g., water, oil, freezing, and dry). However, the macroscopic change and anti‐swelling mechanisms of organohydrogels in different solvents and their corresponding applications have not been adequately harnessed. Herein, an ionic organohydrogel with excellent mechanical properties and unique behaviors (information identification and encryption) and mechanical sensing in multiple environments is prepared. The prepared organohydrogel shows an obvious transparent change in different solvents owing to the microphase separation in poor solvents and swelling in suitable solvents, and can be treated as a dynamic information memory device for recording and encrypting information. Furthermore, owing to the interaction between water and dimethylsulfoxide (DMSO), the organohydrogel demonstrates a prominent freezing resistance (−90 to 20 °C) and moisturizing retention properties (76% after 15 days). In addition, the ionic conductive hydrogel exhibits outstanding human motion detection and physiological signal response and displays a stable mechanical sensing performance in freezing, dry conditions, and oil or water environments. It is envisioned that the design strategies and mechanistic investigation of organohydrogels may be promising for application as bio‐sensors and information‐recognition platforms in harsh environments.

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Super strong dopamine hydrogels with shape memory and bioinspired actuating behaviours modulated by solvent exchange

Cited by 52 publications

References 57 publications

Phenolic Building Blocks for the Assembly of Functional Materials

Phenolic Building Blocks for the Assembly of Functional Materials

Nanoparticle–Polymer Synergies in Nanocomposite Hydrogels: From Design to Application

Ionic Conductive Organohydrogels with Dynamic Pattern Behavior and Multi‐Environmental Stability

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