Constructing Dynamic Macropores in Thermo‐Responsive Hydrogel Actuator for Large‐Deformable Gripper DOI Open Access
Huanhuan Lu, Xin Wen, Baoyi Wu

et al.

Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 20, 2024

Abstract Poly( N ‐isopropyl acrylamide) (PNIPAm)‐based smart hydrogels are widely employed in emerging applications such as drug delivery and tissue engineering, because their lower critical solution temperature (LCST) is close to physiological conditions. However, the dense chain collapse during thermo‐responsive phase transition restricts water diffusion, resulting limited volumetric change. Here, a pure PNIPAm hydrogel that achieves large‐scale volume by incorporating microgels, presented. During its shrinkage, microgels contract 10% of original volume, generating open macropores serve efficient channels, thereby facilitating change bulk. In contrast conventional with static porous structures, these dynamic disappear when return initial state at temperatures, preserving mechanical integrity entire hydrogel. This enhanced deformability enables bilayer actuator achieve bending angles exceeding 1150°, sixfold increase over traditional PNIPAm‐based actuators, allowing it function an intelligent gripper capable capturing small, mobile organisms. approach, which addresses inherent challenge achieving bulk hydrogels, distinct from existing strategies.

Language: Английский

Thermoresponsive Hydrogels for the Construction of Smart Windows, Sensors, and Actuators DOI Creative Commons
Keunhyuk Ryu, Gang Li,

Keyi Zhang

et al.

Accounts of Materials Research, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 3, 2025

Language: Английский

Citations

2
Polymer hydrogels: Classification and recent advances DOI

Mahua Dhara

Journal of Macromolecular Science Part A, Journal Year: 2024, Volume and Issue: 61(5), P. 265 - 288

Published: March 19, 2024

Hydrogels comprise of a group crosslinked hydrophilic polymeric materials which are capable absorbing and holding large quantities water in their three-dimensional network structure without undergoing dissolution. More importantly, the ability 'smart' hydrogels to respond certain environmental changes e.g. pH, heat, light, magnetic field, biomolecules have set them apart as unique class materials. A combination several such useful properties resulted tremendous progress toward development advanced hydrogel-based materials, is evident from an explosive amount research publications available this area over last few decades. Owing particularly biocompatibility biodegradability, become material prime importance context wide range applications starting simple contact lenses more complex ones tissue repair, drug delivery, sensors, 3D bioprinting, soft robotics agriculture. This review includes i) overview its classifications based on source, structure, crosslinking mechanism stimuli responsiveness, ii) detailed discussion some most works being carried out field years smart that need hour, domain biomedical applications.

Language: Английский

Citations

12
From Nature to Technology: Exploring the Potential of Plant-Based Materials and Modified Plants in Biomimetics, Bionics, and Green Innovations DOI Creative Commons
Marcela Elisabeta Barbinta-Patrascu, Bogdan Biță, Irina Neguț

et al.

Biomimetics, Journal Year: 2024, Volume and Issue: 9(7), P. 390 - 390

Published: June 26, 2024

This review explores the extensive applications of plants in areas biomimetics and bioinspiration, highlighting their role developing sustainable solutions across various fields such as medicine, materials science, environmental technology. Plants not only serve essential ecological functions but also provide a rich source inspiration for innovations green nanotechnology, biomedicine, architecture. In past decade, focus has shifted towards utilizing plant-based vegetal waste creating eco-friendly cost-effective with remarkable properties. These are employed making advancements drug delivery, remediation, production renewable energy. Specifically, discusses use (nano)bionic capable detecting explosives contaminants, underscoring potential improving quality life even lifesaving applications. The work refers to architectural inspirations drawn from plant world develop novel design concepts that both functional aesthetic. It elaborates on how engineered have been transformed into value-added through innovative applications, especially roles wastewater treatment electronic components. Moreover, integration synthesis biocompatible medical tissue engineering scaffolds artificial muscles demonstrates versatility capacity replace more traditional synthetic materials, aligning global sustainability goals. paper provides comprehensive overview current uses living technological advancements, advocating deeper exploration address pressing challenges.

Language: Английский

Citations

11
A grape seed protein-tannic acid powder to transform various non-adhesive hydrogels into adhesive gels DOI

Zhuo Ge,

Zi Wang,

Chunhui Luo

et al.

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 266, P. 131215 - 131215

Published: March 28, 2024

Language: Английский

Citations

9
Microgel‐Crosslinked Thermo‐Responsive Hydrogel Actuators with High Mechanical Properties and Rapid Response DOI
Yanyu Yang,

Ying Xiao,

Xiang Wu

et al.

Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: 45(8)

Published: Jan. 16, 2024

Abstract Smart hydrogels responsive to external stimuli are promising for various applications such as soft robotics and smart devices. High mechanical strength fast response rate particularly important the construction of hydrogel actuators. Herein, tough with rapid rates synthesized using vinyl‐functionalized poly( N ‐isopropylacrylamide) (PNIPAM) microgels macro‐crosslinkers ‐isopropylacrylamide monomers. The compression obtained PNIPAM is up 7.13 MPa. microgel‐crosslinked significantly enhanced compared conventional chemically crosslinked hydrogels. can be adjusted by varying proportion monomers crosslinkers. lower critical solution temperature (LCST) could tuned copolymerizing ionic monomer sodium methacrylate. Thermo‐responsive bilayer fabricated PINPAM different LCSTs via a layer‐by‐layer method. thermo‐responsive swelling shrinking properties two layers endow anisotropic structures asymmetric characteristics, allowing respond rapidly. into clamps grab small objects flowers that mimicked closure petals, it shows great application prospects in field

Language: Английский

Citations

8
Self‐Healing Yet Strong Actuator Materials with Muscle‐Like Diastole and Contraction via Multilevel Relaxations DOI Open Access
Zhuo Huang,

Zhibo Wu,

Changchun Li

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 10, 2024

Skeletal muscles represent a role model in soft robotics featuring agile locomotion and incredible mechanical robustness. However, existing actuators lack an optimal combination of actuation parameters (including modes, work capacity, strength, damage repair) to rival biological tissues. Here, biomimetic structural design strategy via multilevel relaxations (α/β/γ/δ-relaxation) modulation is proposed for robust healable actuator materials with muscle-like diastole contraction abilities by orientational alignment dendritic polyphenol-modified nano-assembles eutectogels. The anisotropic hierarchical micro-nanostructures assembled supramolecular interaction mimic the relative slippage actin filaments myosin muscles, ensuring bistable through rapid thermal α-relaxation expansion. Furthermore, kinetically active secondary β/γ/δ-relaxation at reconfigurable interfaces can conquer limited self-healing ability fixed-orientation polymeric chains. obtained artificial muscle exhibits high output actuation, properties (tensile strength 33.5 MPa), desired functional, efficiency (89.7%), exceeding typical natural living systems. bionic micro-nano achieves bottom-up cooperative relaxation integrate all-round performance which paves way substantial advancements next-generation intelligent robotics.

Language: Английский

Citations

8
Thermal management with innovative fibers and textiles: manipulating heat transport, storage and conversion DOI Creative Commons
Yucan Peng, Yi Cui

National Science Review, Journal Year: 2024, Volume and Issue: 11(10)

Published: Aug. 22, 2024

Thermal management is essential for maintaining optimal performance across various applications, including personal comfort, electronic systems and industrial processes. Thermal-management fibers textiles have emerged as innovative solutions to manipulate heat transport, storage conversion efficiently. This review explores recent advancements in material innovations this field. We summarize the novel designed controlling transport through different pathways, progress developing phase-change-material-based regulation, application of photothermal conversion, Joule heating thermoelectric effect energy routes advanced textiles. Furthermore, we discuss challenges future perspectives It believed that ongoing research development promise bring about thermal-management catering demands multiple sectors.

Language: Английский

Citations

6
Compressible Hydrogels with Stabilized Chirality from Thermoresponsive Helical Dendronized Poly(phenylacetylene)s DOI

Lefei Shen,

Yuexin Cao,

Lei Wang

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(34)

Published: May 21, 2024

Fabrication of chiral hydrogels from thermoresponsive helical dendronized phenylacetylene copolymers (PPAs) carrying three-fold dendritic oligoethylene glycols (OEGs) is reported. Three different temperatures, i.e. below or above cloud point temperatures (T

Language: Английский

Citations

5
Hydrogel Fibers‐Based Biointerfacing DOI

Xingmei Chen,

Yinghui Feng, Pei Zhang

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 22, 2024

Abstract The unique 1D structure of fibers offers intriguing attributes, including a high length‐to‐diameter ratio, miniatured size, light‐weight, and flexibility, making them suitable for various biomedical applications, such as health monitoring, disease treatment, minimally invasive surgeries. However, traditional fiber devices, typically composed rigid, dry, non‐living materials, are intrinsically different from the soft, wet, living essence biological tissues, thereby posing grand challenges long‐term, reliable, seamless interfacing with systems. Hydrogel have recently emerged promising candidate, in light their similarity to tissues mechanical, chemical aspects, well distinct geometry. In this review, comprehensive overview recent progress hydrogel fibers‐based biointerfacing technology is provided. It thoroughly summarizes manufacturing strategy functional design, especially optical electron conductive performance, responsiveness triggers thermal, magnetic field ultrasonic wave, etc. Such attributes enable which also examined detail. Future potential directions, biosafety, long‐term reliability, sterilization, multi‐modalities integration intelligent therapeutic systems, raised. This review will serve valuable resource further advancement implementation next‐generation technology.

Language: Английский

Citations

4
Preparation of reversible temperature sensitive acrylamide terpolymer hydrogel for cascade drug loadings DOI
Wen‐Fei Dong, Long Fang,

Jinhai Ma

et al.

Journal of Macromolecular Science Part A, Journal Year: 2025, Volume and Issue: 62(2), P. 187 - 199

Published: Jan. 20, 2025

As a drug delivery system with vast potential applications, hydrogels have garnered significant attention due to their unique loading mechanisms and effectiveness. In this paper, novel reversible thermosensitive hydrogel polymer, synthesized through copolymerization of mono-6-allyl-β-cyclodextrin, N-isopropylacrylamide, acrylamide, is introduced. This polymer formed three-dimensional network structure in water, featuring β-cyclodextrin hydrophobic cavities. The encapsulated molecules could be slowly progressively released from both the IR XRD analysis confirmed successful encapsulation target molecules, sodium salicylate naproxen sodium, within cavity its space. Specifically, when mass ratio N-isopropylacrylamide/acrylamide/mono-6-allyl-β-cyclodextrin was 9.8/0.2/0.5, demonstrated an initial gelation temperature 34.9 °C final 37 °C. expansion rate blank slightly higher than that drug-loaded hydrogel. Both drugs undergo sustained release hydrogel, adhering Fick's diffusion law, ensuring consistent 8 h maintaining for over 24 h, regardless rate. Within 30 days, degradation PBS exceeded 15%, while presence lysozyme more 40%. These properties render versatile candidate targeted biomedical offering strategies treating chronic diseases other conditions.

Language: Английский

Citations

0