Recent advances in tannic acid-based gels: Design, properties, and applications

Advances in Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 339, P. 103425 - 103425

Published: Feb. 15, 2025

Language: Английский

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Adaptation of an Eddy Current Model for Characterizing Subsurface Defects in CFRP Plates Using FEM Analysis Based on Energy Functional

Mathematics, Journal Year: 2024, Volume and Issue: 12(18), P. 2854 - 2854

Published: Sept. 13, 2024

In this work, a known Eddy Current (EC) model is adapted to characterize subsurface defects in carbon fiber-reinforced polymer (CFRP) plates intended for the civil aerospace industry. The considered include delaminations, microcracks, porosity, fiber breakage, and simultaneous presence of these defects. Each defect modeled as an additive variation material’s electrical conductivity tensor, allowing detailed mathematical representation defect’s influence on CFRP’s electromagnetic behavior. additivity variations tensor justified by assumption that are not visible naked eye, implying material does require non-destructive testing. EC admits unique stable solution verifying all analytical steps satisfied. To reconstruct 2D maps magnetic flux density amplitude, FEM formulation adopted, based energy functional because it ensures consistent numerical given its coercivity. Moreover, approach allows precise reliable solutions, enhancing capability detect quantify results show obtained entirely superimposable those highlighting distribution mechanical stress states literature, offering clear advantage terms detection costs. This provides effective economical inspection CFRP, ensuring accurate timely diagnosis maintaining structural integrity.

Language: Английский

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Programmable Microfluidic‐Assisted Highly Conductive Hydrogel Patches for Customizable Soft Electronics

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 9, 2024

Abstract The utilization of hydrogels in soft electronics has led to significant progress the field wearable and implantable devices. However, challenges persist hydrogel electronics, including delicate equilibrium between stretchability electrical conductivity, intricacies miniaturization, susceptibility dehydration. Here, a lignin‐polyacrylamide (Ag‐LPA) composite endowed with anti‐freeze, self‐adhesive, exceptional water retention properties, high (1072%) is presented. Notably, this demonstrated impressive conductivity at room temperature (47.924 S cm −1 ) extremely cold temperatures (42.507 ). It further proposed for microfluidic‐assisted patches (MAHPs) facilitate customizable designs Ag‐LPA composite. This approach enhances offers versatility packaging materials, making it promising choice enduring applications. As proof‐of‐concept, across diverse applications dimensions, encompassing healthcare monitoring, environmental sensing, 3D‐spring pressure monitoring are successfully developed. scenery an environment extended. embedded unveils potential MAHPs polar rescue missions. envisioned that will impact development sophisticated tailored thereby forging new frontiers engineering

Language: Английский

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Fluorinated Graphene Oxide with Tunable Vertical Graft Density for Differential Enhancement of Axial and Transverse Compression Properties of Aramid Fiber

Published: Jan. 1, 2025

Inferior compressive strength of organic fibers restricts their widespread application. Simultaneously improving the axial/transverse properties and tensile remains a significant challenge. To overcome this challenge, based on nucleophilic reaction C-F bonds, modified fluorinated graphene oxide (GOP) that can regulate density vertically grafted molecular chains was innovatively designed to reinforce poly(p-phenylene-benzimidazole-terephthalamide) (PBIA) fibers. Direct fluorination technology successfully preserves oxygen-containing groups when introducing bonds into (GO), thus providing hydrogen bonding sites. Together with π - interactions generated by PBIA chains, combination contributes superior dispersion stability GOP compared GO. Composite co-mixed prepared solution spinning exhibited enhanced crystallinity. The formed stable topological network, chain within composite Hence, adjusting grafting density, an 87.4% increase in axial 37.2% transverse strength, along improvements modulus interfacial shear strength. Moreover, finite element simulations confirmed induce layer deflection, optimizing stress transmission distribution fiber, ultimately leading more improvement performance performance.

Language: Английский

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Strong and Tough Water‐Tolerant Conductive Eutectogels with Phase‐Separated Hydrophilic/Hydrophobic Dual Ionic Channels

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

Published: March 3, 2025

Abstract Eutectogels are emerging as the next‐generation stretchable electronics due to their superior ionic conductivity, non‐volatility, and cost‐effectiveness. Nevertheless, most eutectogels suffer from weak mechanical strength toughness pronounced hygroscopicity. Herein, a strategy is proposed fabricate phase‐separated with dual channels (PSDIC‐gel), which exhibit exceptional integrative properties, especially water resistance. By blending hydrophilic/hydrophobic polymerizable deep eutectic solvents, spontaneously form via polymerization‐induced phase separation. The hydrophilic poly(acrylic acid) (PAA) containing Li + ‐channels, rich in hydrogen bonding ion‐dipole interactions, provides conductivity. hydrophobic poly(hexafluorobutyl acrylate) (PHFBA) incorporating cholinium cation (Ch ) enhances toughness, Adjusting ratio yields microphase‐separated transparent eutectogel high tensile (6.03 MPa), (16.18 MJ m −3 ), excellent conductivity (1.6 × 10 S −1 strong substrate adhesion, rapid room‐temperature self‐healing. Solid‐state NMR reveals conductive mechanism structure featuring PSDIC‐gels, advancing understanding of complex interactions at atomic level. PSDIC‐gel enables flexible triboelectric nanogenerator for accurate real‐time self‐powered human motion sensing. This work advances design through structure‐property engineering, offering universal reconcile robustness, environmental suitability, wearable electronics.

Language: Английский

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Strain-Insensitive Stretchable Conductive Fiber Based on Helical Core with Double-Network Hydrogel

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

Published: March 10, 2025

Language: Английский

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A self-healing flexible sensor based on silicone rubber with synergistic effect of coordination and hydrogen bonds

Plastics Rubber and Composites Macromolecular Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

With the development of society, silicone rubber-based flexible sensors are frequently used in our daily life, such as monitoring people's physical health, tracking movement and activities, improving rehabilitation processes. However, high-frequency use can also compromise material structure even impair service life product. In this study, a novel type self-healing sensing material, PBDMS/PDMS/mMWCNTs, was prepared by first preparing polyborosiloxane (PBDMS) with boric acid hydroxyl oil, then mixing it 107 room temperature curing rubber (PDMS) matrix using silane coupling agent KH560 modified multi-walled carbon nanotubes (mMWCNTs) fillers. PBDMS/PDMS/mMWCNT constructed to form dynamic crosslinked network, resulting high efficiency (up 80% 4 h at temperature). mMWCNTs, on other hand, reinforced mechanical properties (tensile strength 0.46 MPa elongation break 120%) better than most commonly reinforcing industry, SiO 2 nanoparticles. At same time, mMWCNTs dropped both ends surface substrate, internal network formed ‘sandwiched’ structure, which endow composite excellent thermal conductivity electrical conductivity.

Language: Английский

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On the Enhancement of the Long-Term Washability of e-Textile Realized with Electrically Conductive Graphene-Based Inks

Polymers, Journal Year: 2025, Volume and Issue: 17(7), P. 904 - 904

Published: March 27, 2025

This research explores the development of highly durable flexible electronic textiles (e-textiles) for wearable electronics, focusing on improving their washability and performance. A conductive graphene-based ink was screen-printed onto a polyester textile. Water-based polyurethane (PU) coatings with variable crosslinker ratios thickener were applied to solve issues. The results show that PU significantly enhanced electrical stability durability printed pathways after multiple washing cycles. conductivity remained intact 120 cycles, indicating final properties e-textile, which contained 6 wt% 3 crosslinker, provided effective water protection. highlight promise these coated e-textiles electronics applications, especially in occupational healthcare sectors, where long-term flexibility are critical.

Language: Английский

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Stimulus-responsive alternating current electroluminescent textiles for visual human-machine interface

Device, Journal Year: 2025, Volume and Issue: unknown, P. 100751 - 100751

Published: March 1, 2025

Language: Английский

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Upgrading of cotton fabrics by ionic liquid dissolving joint with wet spinning for stretchable and weaveable fiber-based strain sensors

Polymer, Journal Year: 2025, Volume and Issue: unknown, P. 128344 - 128344

Published: April 1, 2025

Language: Английский

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