Sodium alginate reinforced polyacrylamide/xanthan gum double network ionic hydrogels for stress sensing and self-powered wearable device applications

Carbohydrate Polymers, Journal Year: 2023, Volume and Issue: 309, P. 120678 - 120678

Published: Feb. 9, 2023

Language: Английский

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Collagen-Based Organohydrogel Strain Sensor with Self-Healing and Adhesive Properties for Detecting Human Motion

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(9), P. 12350 - 12362

Published: Feb. 24, 2023

Conductive hydrogels are ideal for flexible sensors, but it is still a challenge to produce such with combined toughness, self-adhesion, self-healing, anti-freezing, moisturizing, and biocompatibility properties. Herein, inspired by natural skin, highly stretchable, strain-sensitive, multi-environmental stable collagen-based conductive organohydrogel was constructed using collagen (Col), acrylic acid, dialdehyde carboxymethyl cellulose, 1,3-propylene glycol, AlCl3. The resulting exhibited excellent tensile (strain >800%), repeatable adhesion (>10 times), self-healing [self-healing efficiency (SHE) ≈ 100%], anti-freezing (-60 °C), moisturizing (>20 d), biocompatible This also possessed good electrical conductivity (σ = 3.4 S/m) strain-sensitive properties [GF (gauge factor) 13.65 the maximal strain of 400%]. Notably, had considerable low-temperature performance (SHE 88% at -24 °C) rapid underwater property 92%, time <20 min). type sensor could not only accurately continuously monitor large-scale motions human body provide an accurate response tiny motions. work proposes development strategy multifunctional multiple environmental stability provides potential research value construction biomimetic electronic skin.

Language: Английский

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Strategies in the preparation of conductive polyvinyl alcohol hydrogels for applications in flexible strain sensors, flexible supercapacitors, and triboelectric nanogenerator sensors: an overview

Advanced Composites and Hybrid Materials, Journal Year: 2023, Volume and Issue: 6(6)

Published: Nov. 8, 2023

Language: Английский

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A facile construction of NiV2O6/CeO2 nano-heterojunction for photo-operated process in water remediation reaction, antibacterial studies, and detection of D-Amino acid in peroxidase system

Surfaces and Interfaces, Journal Year: 2023, Volume and Issue: 40, P. 102970 - 102970

Published: May 25, 2023

Language: Английский

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Electrospun thermoplastic polyurethane membrane decorated with carbon nanotubes: A platform of flexible strain sensors for human motion monitoring

Polymer, Journal Year: 2024, Volume and Issue: 303, P. 127120 - 127120

Published: May 1, 2024

A piezoresistive flexible strain sensor was developed using thermoplastic polyurethane elastomers (TPU) as the matrix and carbon nanotubes (CNTs) conductive fillers. Sensitivity, range, tensile cycling stability were concurrently considered during its design. Electrospun TPU fiber membranes prepared via electrospinning in this experiment, with controllable diameter achieved by adjusting rotational speed of receiving drum. CNTs incorporated into a polymer substrate through suction filtration to create sensor. The support structure electrospun film served carrier for uniformly adhering particles. Well-dispersed could more easily achieve uniform loading pore size film, thereby forming layer. This study initially determined influence content spinning solution on morphology membrane. Subsequently, effects CNT drum microstructure investigated, along their impact microstructure, mechanical properties, sensing performance CNTs/TPU (CT) sensors. results indicate that membrane under conditions mass fraction 20 wt% 100 r/min has larger average stable scaffold structure. sensor, filtering 10 mL concentration 2 mg/mL, exhibited best strength elongation at break 6.22 MPa 575%, respectively. Additionally, it demonstrated high sensitivity (GF=420.17 200% strain) excellent durability (300 cycle tests), enabling quick accurate responses movements various parts human body, meeting basic usage requirements

Language: Английский

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Effect of hydrophobic nano‐silica/β‐nucleating agent on the crystallization behavior and mechanical properties of polypropylene random copolymers

Polymer International, Journal Year: 2023, Volume and Issue: 73(2), P. 108 - 118

Published: Sept. 15, 2023

In this work, hydrophobic nano-silica (SiO2) and β-nucleating agent are incorporated into polypropylene random copolymer (PP-R) matrix by melt blending. The effect of nano-SiO2/β-nucleating agents content on crystallization mechanical behaviors was investigated in detail. When the nano-SiO2 0.5 wt% wt%, tensile strength impact composite were a more balanced position. Regarding isothermal non-isothermal experiments, significantly accelerated nucleation growth crystallites with synergistic effect. Also, kinetics PP-R/nano-SiO2 /β-nucleating agent, PP-R/β-nucleating composites analyzed compared Avrami equation. results showed that PP-R/nano-SiO2/β-nucleating have better rate shorter semi-crystallization time. This study shows it has far-reaching theoretical practical implications for accelerating development new high-performance PP-R materials. article is protected copyright. All rights reserved.

Language: Английский

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Ultrastable and supersensitive conductive hydrogels conferred by “sodium alginate stencil” anchoring strategy

Carbohydrate Polymers, Journal Year: 2024, Volume and Issue: 335, P. 122048 - 122048

Published: March 15, 2024

Language: Английский

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Poly(vinyl alcohol)/polyacrylamide double‐network ionic conductive hydrogel strain sensor with high sensitivity and high elongation at break

Journal of Polymer Science, Journal Year: 2024, Volume and Issue: 62(20), P. 4599 - 4611

Published: July 19, 2024

Abstract As a soft material with biocompatibility and stimulation response, ionic conductive hydrogel‐based wearable strain sensors show great potential across wide spectrum of engineering disciplines, but their mechanical toughness is limited in practical applications. In this study, freeze‐thawing techniques were utilized to fabricate double‐network hydrogels poly(vinyl alcohol)/polyacrylamide (PVA/PAM) both covalent physical cross‐linking networks. These demonstrate excellent performance, an elongation at break 2253% tensile strength 268.2 kPa. Simultaneously, they also display high sensitivity (Gage factor, GF = 2.32 0%–200% strain), achieve rapid response time 368 ms without the addition extra fillers or ions, stable signal transmission even after multiple cycles, fast human motion detection.

Language: Английский

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Underwater Gesture Recognition Meta-Gloves for Marine Immersive Communication

ACS Nano, Journal Year: 2024, Volume and Issue: 18(16), P. 10818 - 10828

Published: April 10, 2024

Rapid advancements in immersive communications and artificial intelligence have created a pressing demand for high-performance tactile sensing gloves capable of delivering high sensitivity wide range. Unfortunately, existing fall short terms user comfort are ill-suited underwater applications. To address these limitations, we propose flexible hand gesture recognition glove (GRG) that contains micropillar sensors (MPTSs) inspired by the tube foot starfish. The as-prepared offer working range (5 Pa to 450 kPa), superfast response time (23 ms), reliable repeatability (∼10000 cycles), low limit detection. Furthermore, MPTSs waterproof, which makes them well-suited By integrating with machine learning algorithm, proposed GRG system achieves intelligent 16 gestures under water, significantly extends real-time effective communication capabilities divers. holds tremendous potential applications field communications.

Language: Английский

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Multifunctional natural starch-based hydrogels: Critical characteristics, formation mechanisms, various applications, future perspectives

Carbohydrate Polymers, Journal Year: 2025, Volume and Issue: 357, P. 123458 - 123458

Published: March 2, 2025

Language: Английский

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