Reduced Graphene Oxide Interlocked Carbonized Loofah for Energy Harvesting and Physiological Signal Monitoring DOI

Jiaji Yue,

Yilin Teng,

Huang Ying

et al.

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: 6(5), P. 3734 - 3741

Published: April 24, 2024

Highly conductive carbonaceous nanomaterials derived from biomass fibers (e.g., loofah) have been extensively employed in flexible sensors. Nonetheless, the even texture of carbonized loofah (CL) constrained contact surface area with adjacent fibers, given its conductivity. Herein, CL interlocked by reduced graphene oxide (rGO) nanosheets was to construct highly hydrogel, which served as sensor module and triboelectric nanogenerator (TENG) a self-powered sensing system. Originating π–π interaction, rGO can be firmly fixed on act bridge reduce electron transfer gap, thereby resulting accelerated transport. Compared pristine electrical conductivity CL@rGO hydrogel improved 28.5 S/m 55.2 exhibits performance terms output when incorporated into TENG devices. The built-up exhibited remarkable durability for more than 10,000 cycles, maximum gauge factor (GF) 16021 rapid response time 20 ms. Due these attributes, is capable efficiently monitoring capacity complex human activities. considerable potential across multiple domains, encompassing wearable electronics, artificial intelligence devices human-machine owing adaptable characteristics.

Language: Английский

Zwitterion-Incorporated Antifreeze Hydrogel with Highly Stretchable, Transparent, and Self-Adhesive Properties for Flexible Strain Sensors DOI
Hui Peng,

Lili Hao,

Xusheng Zhang

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(3), P. 1911 - 1921

Published: Jan. 31, 2024

Hydrogels are considered to be one of the most promising flexible sensing materials for a variety practical applications. However, hydrogels usually freeze at temperatures below freezing and lose their inherent properties. Thus, it is highly desirable prepare that can simultaneously have excellent mechanical properties antifreezing low temperatures. Herein, facile photoinitiated polymerization strategy employed introduce zwitterionic proline (ZP) into poly(2-hydroxyethyl acrylate) (PHEA) matrix stretchable adhesive PHEA/ZP hydrogel with good freezing-tolerant Due presence abundant hydrogen bonds electrostatic interaction forces, obtained exhibits (stretch 810%), self-adhesive nature, high transparency (>90%), rapid electrical self-healing capability. More importantly, ZP endows considerable antifreeze properties, making completely transparent even −40 °C. In addition, use as strain sensor accurately monitor human motions, such flexion limbs joint microstress. Therefore, assisted by zwitterions enables wearable sensors motion detection room temperature temperature, which has great potential in field sensors.

Language: Английский

Citations

8
Magneto-Induced Janus Adhesive-Tough Hydrogels for Wearable Human Motion Sensing and Enhanced Low-Grade Heat Harvesting DOI

Yindong Xu,

Keyong Sun,

Lingyi Huang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(8), P. 10556 - 10564

Published: Feb. 15, 2024

Janus hydrogels with different properties on the two surfaces have considerable potential in field of material engineering applications. Various been developed, but there are still some problems, such as stress mismatch caused by double-layer structure and failure diffusion gradient structure. Here, we report a adhesive-tough hydrogel polydopamine-decorated Fe3O4 nanoparticles (Fe3O4@PDA) at one side induced magnetic to avoid uncontrollable cross-linking polymerization acrylamide alginate-calcium. The magneto-induced (MIJ) has an adhesive surface tough bulk without obvious interface mismatch. Due intrinsic dissipative matrix abundant catechol groups surface, it shows strong adhesion onto various substrates. MIJ high sensitivity (GF = 0.842) detecting tiny human motion. Owing synergy Fe3O4@PDA-enhanced interfacial heat transfer, is possible quickly generate effective temperature differences when adhering skin. achieves Seebeck coefficient 13.01 mV·K-1 output power 462.02 mW·m-2 20 K difference. This work proposes novel strategy construct for flexible wearable devices motion sensing low-grade harvesting.

Language: Английский

Citations

8
High Stretchability and Elastic Self-Healing Polyurethane Elastomer through Dual Cross-Linking with Metal–Ligand Coordination and Hydrogen Bonds DOI
Tianyu Su, Liwei Su, Zheng Zhao

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(16), P. 9763 - 9770

Published: Aug. 2, 2024

Herein, a high stretchability and elastic self-healing (SH) polyurethane elastomer is designed by introducing the ligand PDs with two hydrazides one pyridine into IPDI-type backbone, which can guarantee synergistic interplay of multiple dynamic bonds including abundant hydrogen bonds, strong cross-linking H-bonds (PDs–PDs), weak (urea amine–ester etc.), metal coordination (PDs–Ce). The introduction these not only confers excellent SH properties but also enhances mechanical characteristics material. exhibits remarkable tensile strength (11.3 MPa), exceptional (1336%), toughness (82.6 MJ m–3) as well an impressive healing efficiency (ηH) reaching 91% after 24 h at ambient temperature. These are linked to H-bonds, metal–ligand Besides, was applied in balloons, self-repairing tires, membrane material, all show better performance, thus confirming viability material high-performance for various applications.

Language: Английский

Citations

8
Carboxymethyl cellulose-based hydrogel with high-density crack microstructures inspired from the multi-tentacles of octopus for ultrasensitive flexible sensing microsystem DOI

Jiaji Yue,

Huang Ying,

Yilin Teng

et al.

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 261, P. 129533 - 129533

Published: Jan. 19, 2024

Language: Английский

Citations

7
A co-type ductile film with high tensile strength and fast self-healing properties for shaped fruit preservation DOI
Li Liu, Yuancheng Zhang,

Fengqiong Jiang

et al.

Journal of Materials Chemistry B, Journal Year: 2024, Volume and Issue: 12(13), P. 3262 - 3272

Published: Jan. 1, 2024

Structural formula of CTPB hydrogels and schematic diagram co-type film formation; hydrogel has rapid self-healing, antimicrobial properties biosafety.

Language: Английский

Citations

7
Sodium alginate supramolecular nanofibers in synergy with surface crack engineering to prepare tough and highly sensitive hydrogels DOI

Yaoxun Zhang,

Zhuo Chen,

Jian Zou

et al.

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 279, P. 135507 - 135507

Published: Sept. 11, 2024

Language: Английский

Citations

7
Intrinsically conductive and highly stretchable liquid metal/carbon nanotube/elastomer composites for strain sensing and electromagnetic wave absorption DOI

Haeji Kim,

G.M. Kim,

Jidong Kang

et al.

Advanced Composites and Hybrid Materials, Journal Year: 2024, Volume and Issue: 8(1)

Published: Nov. 30, 2024

Language: Английский

Citations

6
PAM/CNTs-Au microcrack sensor with high sensitivity and wide detection range for multi-scale human motion detection DOI
Jianfeng Chen,

Ran Hou,

Sen Li

et al.

Sensors and Actuators A Physical, Journal Year: 2024, Volume and Issue: 370, P. 115203 - 115203

Published: Feb. 23, 2024

Language: Английский

Citations

5
Wide Temperature Range Responsive Flexible Sensors Based on Whisker Carbon Nanotube/Fluorosilicone Elastomer Composite Films DOI

Taofu Zhao,

Xincheng Wang, Wenshuo Du

et al.

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 16, 2025

Language: Английский

Citations

0
A multipurpose silicone elastomer vaginal ring releasing dapivirine and Cu2+/Zn2+ ions for HIV prevention and non-hormonal contraception DOI Creative Commons
Xin Shen, Peter D. W. Boyd, Yahya H. Dallal Bashi

et al.

International Journal of Pharmaceutics, Journal Year: 2025, Volume and Issue: unknown, P. 125442 - 125442

Published: March 1, 2025

A dapivirine (DPV)-releasing vaginal ring (DapiRing®, containing 25 mg DPV) has been approved in various African countries for prevention of human immunodeficiency virus type 1 (HIV-1). Current research is focused on next-generation multipurpose technology (MPT) rings that additionally provide contraception, and a combination + levonorgestrel clinical development. However, hormonal contraceptives have numerous side effects contraindications, many women are interested hormone-free contraceptive options. Copper zinc well documented spermicidal activity; example, copper intrauterine devices-comprising metal wire fitted to polyethylene frame releasing cupric (Cu2+) ions-have long history use as long-actingreversible non-hormonal form contraception. Here, we report offering sustained release DPV, Cu2+ ions, Zn2+ ions. Matrix-type silicone elastomer different combinations DPV (25 mg) copper/zinc substances (copper nanopowders, sulphate pentahydrate, acetate dihydrate) were successfully manufactured by injection molding. the nanopowders stable during manufacturing; partial dehydration occurred with pentahydrate dihydrate. Incorporation had minimal impact release, formulations produced similar compared DapiRing®. Rings salts released significantly more Cu2+/Zn2+ ions than those greater quantities marketed IUDs or experimental copper-zinc IUDs. The results demonstrate metals can be effectively incorporated into from compatible DPV. inclusion offers potential contraception warrants further investigation context MPTs.

Language: Английский

Citations

0