Mechanoresponsive self‐powered piezoelectric energy‐generating composite hydrogels based on carbon nanotube‐reinforced fungal‐carboxymethyl chitosan‐bacterial cellulose nanofibers for wearable electronics DOI Open Access

Kummara Madhusudana Rao,

Vineet Kumar, Sang‐Shin Park

et al.

Polymer Engineering and Science, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 8, 2024

Abstract Developing conductive hydrogels with both enhanced mechanical properties and superior sensing capabilities for wearable, flexible electronics remains challenging. Here, we developed mechanoresponsive self‐powered piezoelectric energy‐generating composite hydrogels. These were prepared by blending fungal‐derived carboxymethyl chitosan (FC), carboxylate‐bacterial cellulose nanofibers (CBC‐NFs), carbon nanotubes (CNTs) within a covalently crosslinked polyacrylamide (PAM) network (CNT‐FBCNF). The resulting showed remarkable due to the molecular interactions between polymer chains. self‐recoverable property high stability under compressive force at 40% of strain (2000 cycles). maximum load (N) 27.8 N was obtained optimized hydrogel, CNT‐FBCNF (1% CNT content). This hydrogel exhibited good conductivity 1.3 S/m, which attributed homogeneous dispersion CNTs matrix sufficient biocompatibility skin fibroblasts. also impressive performance as sensor, boasting wide range (10–40%), excellent stability, repeatability. Furthermore, strategic cutting assembly generated sensor capable accurately monitoring finger thumb pressure in real‐time. study will significantly accelerate development hydrogel‐based sensors rapidly advancing field wearable soft electronics. Highlights CNT‐reinforced electrical (1.3 S/m) self‐recovery strain‐sensing capability 10%

Language: Английский

Chemical‐Physical Synergistic Assembly of MXene/CNT Nanocoatings in Silicone Foams for Reliable Piezoresistive Sensing in Harsh Environments DOI

Zuan‐Yu Chen,

Shuai‐Chi Liu,

Yu‐Xi Wu

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 30, 2024

Abstract Owing to their high sensitivity across a wide stress range, mechanical reliability, and rapid response time, flexible polymer foam piezoresistive sensors have been extensively used in various fields. The reliable application of these under harsh environments, however, is severely limited by structural devastation poor interfacial bonding between polymers conductive nanoparticles. To address the above issues, robust MXene/CNT nanocoatings on surface, where chemical assembly MXene nanosheets physical anchoring CNTs lead strong bonding, are designed described, which endows foams with reliability unexpected multi‐functionalities without compromising instinct properties. optimized nanocomposites thus maintain outstanding wide‐temperature flexibility (−60–210 °C) elasticity (≈3% residual strain after 1000 cycles). Moreover, display good at relatively range 0–70% remarkable stability acidic alkaline settings. Furthermore, exceptional fire resistance (UL‐94 V‐0 rating) can provide stable sensing behavior (over 300 cycles) even being exposed flames for 5 s, making them one most materials so far. Clearly, this work widens applications based silicone environments.

Language: Английский

Citations

17
Preparation of Conductive Silicone-Rubber Composites by Dynamic Magnetic Field-Induced Orientation of Ferrosoferric Oxide-Loaded Reduced Graphene Oxide DOI

Jikai Xie,

Qin Zhou,

Jiaxing Guo

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(10), P. 5684 - 5695

Published: May 14, 2024

Conductivity in flexible silicone rubber (SR) is usually achieved by a large number of fillers, which tend to degrade the mechanical properties. Therefore, improving efficiency conductive fillers key producing high performance SR composites. In this study, approximately 28.58% ferrosoferric oxide was loaded onto graphene (Fe3O4@RGO) prepare composites inducing Fe3O4@RGO alignment room-temperature vulcanized matrix using homemade translational and rotational magnetic fields. Raman spectroscopy scanning electron microscopy showed that formation field-induced Fe3O4@RGO-oriented significantly improves electrical conductivity The orientation with magnetic-field strength 180 mT 2 cm/s field or r/s rotating field. Moreover, electromagnetic shielding efficacy were up 1.10 ms/mm 20 dB for field, 0.84 ms/mm, 21.6 respectively. material's overall improved controllable gradient materials under influence Thus, study provides feasible method preparing highly soft polymers.

Language: Английский

Citations

7
Optimized Skimmer Design for Enhanced Oil Spill Recovery and Marine Environmental Protection: Addressing Key Challenges in Oceanic Pollution Control DOI

Alireza Zahedi,

Behzad Kanani

Journal of Marine Science and Application, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Language: Английский

Citations

1
Polydopamine/Carbon Black/Carbon Nanofiber/Thermoplastic Polyurethane Composite Nanofiber Strain Sensor with Ultrahigh Loading Rate for Human Activity Monitoring DOI
Zhiyuan Gao, Yanxin Wang,

Xinhui Mao

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(10), P. 11690 - 11703

Published: May 8, 2024

Developing flexible wearable strain sensors that combine high performance and cost-effectiveness remains a challenge. We proposed the polarity-induced adsorption theory based on like dissolves principle, which can dramatically increase loading rate of carbon nanomaterials TPU electrospun nanofiber substrates, constructed PDA/CB/CNF/TPU (PCCT) with dual-mode three-dimensional nanobrush-bridging structures binary carbon-based active filler through introduction mixed dispersant system. The trend similar effects sheet resistance present for variety systems proves objective existence applicability theory, then, microscopic mechanism action model is analyzed explained. optimization scheme summarized this basis resulted in PCCT an ultrahigh nanomaterial 59.5% ultralow 68.5 Ω/sq, enabled high-density conductive network synergistic double-bridging to demonstrate full-stretch range responsiveness (0.12–285%) sensitivity (GF = 25.5 (0–100%), 84.3 (100–200%) 312.4 (200–285%)), realizing enhancement low-cost devices. Finally, testing response different levels including human joint movements muscle such as blinking proved practical value wide applications field monitoring.

Language: Английский

Citations

4
Transient Piezoresistive Strain Sensors Based on Elastic Biopolymer Thin Films DOI
Mostafa Vahdani, Milad Razbin, Sajad A. Moshizi

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(11), P. 6530 - 6539

Published: June 3, 2024

Natural polymers are known for their "green" characteristics with high biodegradability and biocompatibility thus have great potential the development of transient sensors. In this paper, flexible stretchable piezoresistive sensors were developed based on natural polymer blends starch cellulose. When starch, water-soluble sodium carboxymethyl cellulose, plasticizer glycerol combined, highly thin films created subsequently used as substrates to develop degradable strain The resultant exhibit a gauge factor 3.9, fast response (response time 0.38 s), durability, failure up 180%, low hysteresis (∼15%) when exposed 20% cyclic tensile strain. demonstrated abilities detect respiration rate human joint bending (such wrist, finger, neck joints). More significantly, it was shown that sensor can be dissolved in hot water (95 °C), indicating is easily disposed of. It expected offers sustainable options electronics applications health sports monitoring human–machine interfaces.

Language: Английский

Citations

3
Laser Thermochemical Synthesis of MXene/Graphene Heterostructure for a Highly Sensitive Flexible Pressure Sensor DOI
Yunfan Li, Zezhou Yang, Xiao Chen

et al.

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: 6(7), P. 5117 - 5125

Published: June 24, 2024

Laser-induced graphene (LIG) shows broad application prospects in flexible pressure sensors due to its adjustable electrical properties, good economy, and roll-to-roll compatibility. Incorporating an appropriate nanomaterial into LIG is effective method significantly improve pressure-sensitive properties. In this study, we report MXene nanoengineered for highly sensitive piezoresistive sensors. The photochemically synthesized MXene-derived nanosheets are anchored the porous network of form a MXene/graphene heterostructure (LIMG) by situ coconversion MXene/Polyamide acid (PAA) composite under laser irradiation. Benefiting from conductive paths created matrix stable chemical bonding MXene-LIG interfaces, LIMG sensor exhibits sensitivity 20 kPa–1, which 567% higher than sensor. Meanwhile, has wide range 80 kPa, fast response/recovery time 42/28 ms, excellent stability over 4000 cycles. practical applications, effectively monitors human physiological signals, such as voice, pulse, respiration, proving wearable health monitoring. Furthermore, preparation two-dimensional/three-dimensional (2D/3D) heterostructures one-step expected promote development synthesis technology.

Language: Английский

Citations

3
Ultralow-Density Mesoporous PDMS-Doped Graphene Oxide Foam for Cyclic Oil Absorption and FOG Deposition Mitigation DOI
Mehedi Hasan,

Dipta Mozumder,

Sams Uddin Sams

et al.

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

Published: April 1, 2025

Language: Английский

Citations

0
High Performance Room Temperature Multiferroic Properties of w‐MnSe Altermagnet DOI Creative Commons
Djamel Bezzerga, Imran Khan, Jisang Hong

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 22, 2025

Abstract Altermagnetism and ferroelectricity are reported in certain materials. However, the possibility of their coexistence or interplay a single‐material phase remains an open question. Here, multiferroicity hexagonal wurtzite MnSe ( w ‐MnSe) is explored via first‐principles calculations. The ‐MnSe exhibits altermagnet semiconducting nature characterized by direct bandgap 1.98 eV spin splitting up to 245 meV valence band structure. has in‐plane magnetic anisotropy energy (MAE) −31 µeV per cell along ‐direction Néel temperature T N ) ≈405 K. Besides, giant out‐of‐plane spontaneous electric polarization 53 µC cm − 2 moderate barrier 0.37 f.u −1 . ferroelectric critical C 965 K obtained, this may indicate excellent thermal stability. correlation postulated between altermagnetim control orientation mediated rotation polyhedra formed nonmagnetic elements within lattice finding implies that can be potential material for future‐generation multiferroic devices operate above room temperature.

Language: Английский

Citations

0
Highly sensitive PDMS-Ag nanoflakes porous pressure sensors prepared by templating and molding approaches for wearable applications DOI Creative Commons
Giorgio Mogli,

Matteo Costantini,

Stefano Stassi

et al.

Sensors and Actuators A Physical, Journal Year: 2025, Volume and Issue: unknown, P. 116734 - 116734

Published: May 1, 2025

Language: Английский

Citations

0
Lignin-based adaptable covalently cross-linked fabric for flexible sensors DOI

Xiaozhen Ma,

Xiaolin Wang, Honglong Zhao

et al.

Materials Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 8(17), P. 2845 - 2850

Published: Jan. 1, 2024

A high toughness, and deformation-responsive covalent adaptable lignin-based polyurethane was synthesized.

Language: Английский

Citations

2