Hard magnetics in ultra-soft magnetorheological elastomers enhance fracture toughness and delay crack propagation DOI Creative Commons
Miguel Ángel Moreno, Mokarram Hossain, Paul Steinmann

et al.

Journal of the Mechanics and Physics of Solids, Journal Year: 2023, Volume and Issue: 173, P. 105232 - 105232

Published: Feb. 2, 2023

Pre-existing flaws in highly stretchable elastomers trigger fracture under large deformations. For multifunctional materials, mechanics may be influenced by additional physical phenomena. This work studies the implications of hard magnetics on behaviour ultra-soft magnetorheological (MREs). We experimentally demonstrate that MREs with remanent magnetisation have up to a 50% higher toughness than non pre-magnetised samples. Moreover, we report crack closure due magnetic field as mechanism delays opening cracks MREs. To overcome experimental limitations and provide further understanding, phase-field model for is conceptualised. The numerical incorporates magneto-mechanical coupling stress concentration at tip smaller when MRE pre-magnetised. Overall, this unveils intriguing applications functional actuators, better potential performance cyclic loading.

Language: Английский

Achieving Swollen yet Strengthened Hydrogels by Reorganizing Multiphase Network Structure DOI
Yiwan Huang,

Sanyu Qian,

Ju Zhou

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(22)

Published: Feb. 28, 2023

Abstract Many living tissues, such as muscle, become mechanically stronger with growth. Yet, synthetic hydrogels usually exhibit an opposite size‐mechanical property relation, that is, swelling‐weakening behavior. Herein, a series of swollen yet strengthened polyampholyte (PA) are developed via simple metal‐ion solution soaking strategy. In this strategy, dynamic PA hydrogel (with ionic bonds) is dialyzed in ZrOCl 2 solutions (Step‐I) and deionized water (Step‐II) successively to obtain equilibrated hydrogels. Due the specific Zr 4+ ions network structure, Step‐I takes several months sample size mechanical performance increasing continuously, while Step‐II only needs days. Through resultant networks reorganized eventually constructed by metalligand bonds, enabling swelling strengthening A systematic study confirms dialysis time corresponding concentration can significantly affect multiphase microstructures hydrogels, resulting different enhancements. The optimized possesses 39.2 MPa Young's modulus 3.7 tensile strength, which 302 5.5 times these original gel, respectively. Despite distinct swelling, still surpass many existing high‐performance This opens novel pathway for fabricating

Language: Английский

Citations

46
Tough adhesion enhancing strategies for injectable hydrogel adhesives in biomedical applications DOI

Chenguang Ouyang,

Haojie Yu, Li Wang

et al.

Advances in Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 319, P. 102982 - 102982

Published: Aug. 13, 2023

Language: Английский

Citations

42
Progress in the development of piezoelectric biomaterials for tissue remodeling DOI
Amit Nain,

Srishti Chakraborty,

Snigdha Roy Barman

et al.

Biomaterials, Journal Year: 2024, Volume and Issue: 307, P. 122528 - 122528

Published: March 11, 2024

Language: Английский

Citations

41
Additive manufacturing of highly entangled polymer networks DOI
Abhishek P. Dhand, Matthew D. Davidson, Hannah M. Zlotnick

et al.

Science, Journal Year: 2024, Volume and Issue: 385(6708), P. 566 - 572

Published: Aug. 1, 2024

Incorporation of polymer chain entanglements within a single network can synergistically improve stiffness and toughness, yet attaining such dense through vat photopolymerization additive manufacturing [e.g., digital light processing (DLP)] remains elusive. We report facile strategy that combines dark polymerization to allow constituent chains densely entangle as they form printed structures. This generalizable approach reaches high monomer conversion at room temperature without the need for additional stimuli, or heat after printing, enables highly entangled hydrogels elastomers exhibit fourfold- sevenfold-higher extension energies in comparison traditional DLP. used this method print high-resolution multimaterial structures with features spatially programmed adhesion wet tissues.

Language: Английский

Citations

30
Multifunctional photothermal hydrogels: Design principles, various functions, and promising biological applications DOI

Zikang Hu,

Hengjie Zhang, Zhengqiu Li

et al.

Chinese Chemical Letters, Journal Year: 2024, Volume and Issue: 35(10), P. 109527 - 109527

Published: Jan. 21, 2024

Language: Английский

Citations

17
Emerging polymeric materials for treatment of oral diseases: design strategy towards a unique oral environment DOI Creative Commons
Bo Jia, Beibei Zhang, J. Li

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(7), P. 3273 - 3301

Published: Jan. 1, 2024

Oral diseases are prevalent but challenging owing to the highly movable and wet, microbial inflammatory environment. Polymeric materials regarded as one of most promising biomaterials due their good compatibility, facile preparation, flexible design obtain multifunctionality. Therefore, a variety strategies have been employed develop with improved therapeutic efficacy by overcoming physicobiological barriers in oral diseases. In this review, we summarize polymeric for treatment First, present unique environment including environment, which hinders effective Second, series designing towards such highlighted. For example, multifunctional armed wet-adhesive, antimicrobial, anti-inflammatory functions through advanced chemistry nanotechnology effectively treat These achieved wet-adhesive polymers modified hydroxy, amine, quinone, aldehyde groups provide strong wet-adhesion hydrogen covalent bonding, electrostatic hydrophobic interactions, developing antimicrobial cationic polymers, peptides, antibiotic-conjugated synthesizing phenolic hydroxy cysteine that function immunomodulators electron donors reactive oxygen species reduce inflammation. Third, various delivery systems enhanced mucosa biofilm penetration capabilities, nanoparticles, hydrogels, patches, microneedles, constructed antibiotics, immunomodulators, antioxidants achieve efficacy. Finally, insights into challenges future development promise clinical translation.

Language: Английский

Citations

16
Wearable biosensors for cardiovascular monitoring leveraging nanomaterials DOI
Xuxu Chen, Farid Manshaii,

Karley Tioran

et al.

Advanced Composites and Hybrid Materials, Journal Year: 2024, Volume and Issue: 7(3)

Published: May 27, 2024

Language: Английский

Citations

16
Emerging Wearable Acoustic Sensing Technologies DOI Creative Commons
Tao Liu,

Y. J. Mao,

Hanjie Dou

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

Sound signals not only serve as the primary communication medium but also find application in fields such medical diagnosis and fault detection. With public healthcare resources increasingly under pressure, challenges faced by disabled individuals on a daily basis, solutions that facilitate low-cost private hold considerable promise. Acoustic methods have been widely studied because of their lower technical complexity compared to other solutions, well high safety threshold human body acoustic energy. Furthermore, with recent development artificial intelligence technology applied speech recognition, recognition devices, systems capable assisting interacting scenes are constantly being updated. This review meticulously summarizes sensing mechanisms, materials, structural design, multidisciplinary applications wearable devices health human-computer interaction. Further, advantages disadvantages different approaches used flexible various examined. Finally, current roadmap for future research analyzed based existing progress achieve more comprehensive personalized healthcare.

Language: Английский

Citations

4
Bio‐inspired adhesive hydrogel for biomedicine—principles and design strategies DOI Creative Commons
Wenzhao Li, Xinyuan Yang, Puxiang Lai

et al.

Smart Medicine, Journal Year: 2022, Volume and Issue: 1(1)

Published: Dec. 1, 2022

The adhesiveness of hydrogels is urgently required in various biomedical applications such as medical patches, tissue sealants, and flexible electronic devices. However, biological tissues are often wet, soft, movable, easily damaged. These features pose difficulties for the construction adhesive use. In nature, organisms adhere to unique strategies, reversible sucker adhesion octopuses nontoxic firm catechol chemistry mussels, which provide many inspirations overcome above challenges. this review, we systematically classify bioadhesion strategies into structure-related molecular-related ones, cover almost all known paradigms. We outline principles these summarize corresponding designs inspired by them. Finally, conclusions perspectives concerning development field provided. For booming bio-inspired hydrogels, review aims analyze existing theories systematic guidance future research from an innovative perspective.

Language: Английский

Citations

62
Bio-macromolecular design roadmap towards tough bioadhesives DOI
Hossein Montazerian, Elham Davoodi, Avijit Baidya

et al.

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(21), P. 9127 - 9173

Published: Jan. 1, 2022

Bioadhesive materials are promising candidates for sealing wounds as replacements suturing and stapling techniques. Design of biomaterials involves introducing adhesive functionality into tough polymer networks.

Language: Английский

Citations

58