Self-Healing, Self-Adhesive Silk Fibroin Conductive Hydrogel as a Flexible Strain Sensor

ACS Applied Materials & Interfaces, Journal Year: 2021, Volume and Issue: 13(33), P. 40013 - 40031

Published: Aug. 10, 2021

Flexible and wearable hydrogel strain sensors have attracted tremendous attention for applications in human motion physiological signal monitoring. However, it is still a great challenge to develop sensor with certain mechanical properties tensile deformation capabilities, which can be conformal contact the target organ also self-healing properties, self-adhesive capability, biocompatibility, antibacterial high sensitivity, stable electrical performance. In this paper, an ionic conductive (named PBST) rationally designed by proportionally mixing polyvinyl alcohol (PVA), borax, silk fibroin (SF), tannic acid (TA). SF not only reinforcement introduce energy dissipation mechanism into dynamically cross-linked network stabilize non-Newtonian behavior of PVA borax but act as cross-linking agent combine TA reduce dissociation on network, improving viscoelasticity hydrogel. The combination improve ability realize adjustable without sacrificing other properties. obtained has excellent stretchability (strain > 1000%) shows good skin. When damaged external strain, rapidly self-repair (mechanical properties) stimuli. It adhesiveness repeatable different materials (steel, wood, PTFE, glass, iron, cotton fabric) biological tissues (pigskin) easy peel off residue. PBST wide strain-sensing range (>650%) reliable stability. adhered skin surface monitor large movements such finger joints, wrist knee so detect swallowing, smiling, facial bulging calming, micro-deformation behaviors. distinguish physical signals light smile, big laugh, fast slow breathing, deep shallow breathing. Therefore, material multiple synergistic functions potential flexible sensor. biocompatibility at same time, provides safety guarantee This work expected provide new way people ideal sensors.

Language: Английский

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Self-Recovery, Fatigue-Resistant, and Multifunctional Sensor Assembled by a Nanocellulose/Carbon Nanotube Nanocomplex-Mediated Hydrogel

ACS Applied Materials & Interfaces, Journal Year: 2021, Volume and Issue: 13(42), P. 50281 - 50297

Published: Oct. 12, 2021

Flexible sensors have attracted great research interest due to their applications in artificial intelligence, wearable electronics, and personal health management. However, the inherent brittleness of common hydrogels, preparing a hydrogel-based sensor integrated with excellent flexibility, self-recovery, antifatigue properties still remains challenge date. In this study, type physically chemically dual-cross-linked conductive hydrogels based on 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofiber (TOCN)-carrying carbon nanotubes (CNTs) polyacrylamide (PAAM) matrix via facial one-pot free-radical polymerization is developed for multifunctional sensing application. Inside hierarchical gel network, TOCNs not only serve as nanoreinforcement toughening effect but also efficiently assist homogeneous distribution CNTs hydrogel matrix. The optimized TOCN-CNT/PAAM integrates high compressive (∼2.55 MPa at 60% strain) tensile (∼0.15 MPa) strength, intrinsic self-recovery property (recovery efficiency >92%), capacity under both cyclic stretching pressing. assembled by exhibit strain sensitivity (gauge factor ≈11.8 100-200% good pressure ability over large range (0-140 kPa), which can effectively detect subtle large-scale human motions through repeatable stable electrical signals even after 100 loading-unloading cycles. comprehensive performance superior those most gel-based previously reported, indicating its potential devices healthcare systems motion monitoring.

Language: Английский

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A review of single electrode triboelectric nanogenerators

Nano Energy, Journal Year: 2022, Volume and Issue: 106, P. 108043 - 108043

Published: Nov. 30, 2022

Language: Английский

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Liquid‐Free, Anti‐Freezing, Solvent‐Resistant, Cellulose‐Derived Ionic Conductive Elastomer for Stretchable Wearable Electronics and Triboelectric Nanogenerators

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(46)

Published: Sept. 7, 2022

Abstract The development of flexible conductive elastomers integrating renewable feedstock, splendid mechanical property, and excellent weather resistance is major interest challenge. Here, a novel strategy reported to construct the liquid‐free cellulose‐derived ionic elastomer that successfully applied in wearable sensor triboelectric nanogenerators (TENG). In this strategy, with physical chemical dual‐crosslinking network prepared via situ polymerization polymerizable deep eutectic solvent. construction improves strength toughness more than 2 times, cellulose contributes forming dense hydrogen bond crosslinking can improve recyclability, anti‐freezing, solvent‐resistance performance. Benefiting from these features, sensors TENG for monitoring human motion, harvesting energy convert into stable electrical outputs light LEDs, charge capacitor, power electronic watch. maintains reliable sensing performance even after recycling, soaking organic solvent, or at low/high temperature. This study paves promising fabricating sustainable multifunction electronics are suitable harsh environments.

Language: Английский

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Regulating lignin content to obtain excellent bamboo-derived electromagnetic wave absorber with thermal stability

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 430, P. 133178 - 133178

Published: Oct. 28, 2021

Language: Английский

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Transparent wood-based functional materials via a top-down approach

Progress in Materials Science, Journal Year: 2022, Volume and Issue: 132, P. 101025 - 101025

Published: Oct. 3, 2022

Language: Английский

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Natural Piezoelectric Biomaterials: A Biocompatible and Sustainable Building Block for Biomedical Devices

ACS Nano, Journal Year: 2022, Volume and Issue: 16(11), P. 17708 - 17728

Published: Nov. 10, 2022

The piezoelectric effect has been widely observed in biological systems, and its applications biomedical field are emerging. Recent advances of wearable implantable devices bring promise as well requirements for the materials building blocks. Owing to their biocompatibility, biosafety, environmental sustainability, natural biomaterials known a promising candidate this emerging field, with potential replace conventional ceramics synthetic polymers. Herein, we provide thorough review recent progresses research on five major types including amino acids, peptides, proteins, viruses, polysaccharides. Our discussion focuses structure- phase-related properties fabrication strategies achieve desired phases. We compare analyze performance further introduce comment approaches improve property. Representative group functional energy harvesting, sensing, tissue engineering also discussed. envision that molecular-level understanding effect, response improvement, large-scale manufacturing three main challenges development opportunities interdisciplinary field.

Language: Английский

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Multifunctional CeO2-coated pulp/cellulose nanofibers (CNFs) membrane for wastewater treatment: Effective oil/water separation, organic contaminants photodegradation, and anti-bioadhesion activity

Industrial Crops and Products, Journal Year: 2023, Volume and Issue: 197, P. 116672 - 116672

Published: April 5, 2023

Language: Английский

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Fabrication of Advanced Cellulosic Triboelectric Materials via Dielectric Modulation

Advanced Science, Journal Year: 2023, Volume and Issue: 10(15)

Published: March 26, 2023

The rapid rise of triboelectric nanogenerators (TENGs), which are emerging energy conversion devices in advanced electronics and wearable sensing systems, has elevated the interest high-performance multifunctional materials. Among them, cellulosic materials, affording high efficiency, biodegradability, customizability, becoming a new front-runner. inherently low dielectric constant limits increase surface charge density. However, owing to its unique structure excellent processability, cellulose shows great potential for modulation, providing strong impetus applications era Internet Things artificial intelligence. This review aims provide comprehensive insights into fabrication dielectric-enhanced materials via modulation. exceptional advantages research progress highlighted. effects constant, polarization, percolation threshold on density systematically investigated, theoretical basis Typical characterization methods introduced, their technical characteristics analyzed. Furthermore, performance enhancements endowed by including more efficient harvesting, electronics, impedance matching material strategies, introduced. Finally, challenges future opportunities modulation summarized.

Language: Английский

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A cellulose nanofibril-reinforced hydrogel with robust mechanical, self-healing, pH-responsive and antibacterial characteristics for wound dressing applications

Journal of Nanobiotechnology, Journal Year: 2022, Volume and Issue: 20(1)

Published: July 6, 2022

Abstract Background Bacterial infection in wounds has become a major threat to human life and health. With the growth use of synthetic antibiotics elevated evolution drug resistant bacteria body cells requires development novel wound curing strategies. Herein, pH-responsive hydrogel (RPC/PB) was fabricated using poly(vinyl alcohol)-borax (PB) natural antibiotic resveratrol grafted cellulose nanofibrils (RPC) for bacterial-infected management. Results In this matrix, RPC conjugate interpenetrated PB network form semi-interpenetrating that exhibited robust mechanical properties (fracture strength 149.6 kPa), high self-healing efficiency (> 90%), excellent adhesion performance (tissue shear stress 54.2 kPa). Interestingly, induced RPC/PB showed release behavior, cumulative amount pH 5.4 2.33 times than 7.4, which adapted well acidic microenvironment. Additionally, biocompatibility antioxidant effect. Moreover, vitro vivo results revealed such had antibacterial, skin tissue regeneration closure capabilities. Conclusion Therefore, generated could be an dressing bacteria-infected healing.

Language: Английский

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