High-Resolution Stretchable Soft Liquid Metal Circuits Based on Cu–Ga Alloying and Femtosecond Laser Ablation

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Март 13, 2025

Flexible electronic circuits are critical in biomedical devices, human–machine interfaces, and wearable sensing systems, which further require flexible conductive materials with high conductivity, stretchability, electrical stability. Liquid metal (LM) has attracted much attention due to its unique metallic conductivity room-temperature fluidic properties. However, LM's surface tension properties increase the difficulty of patterning processing. Here, we report a scalable simple fabrication method based on femtosecond laser ablation for facile patterned LM Cu composite electrodes (LM@Cu) substrates. The LM@Cu electrodes, fabricated utilizing exceptional micro–nanoprocessing precision three-dimensional capabilities lasers, exhibit resolution (approximately 5 μm), superior (4.08 × 104 S/cm), enhanced In addition planar circuits, successfully 3D-patterned electrode PDMS hemispheres. presence ultrathin copper foils significantly improves wettability substrate, occurrence alloying reactions between circumvents challenges posed by pattern fabrication. We investigated electromechanical under twisting, bending, stretching detail. addition, serve as an interface rigid devices When suffering external damage, remain working after brush coating excellent fluidity LM. To explore this approach's potential, demonstrate various applications electronics, including stretchable luminous wristbands, strain sensors, "visible" thermotherapy panels relieving aching joints.

Язык: Английский

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Tough and self-healing waterborne polyurethane elastomers via hydrogen bonds and oxime–carbamate design for wearable flexible strain sensors

RSC Advances, Год журнала: 2025, Номер 15(8), С. 6231 - 6240

Опубликована: Янв. 1, 2025

A rigid-soft phase-separated structure with multilayered rigid and flexible supramolecular segments was designed achieved high self-healing efficiency mechanical properties. And, it has the potential to be used in electronic skin.

Язык: Английский

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Organic peroxide vulcanization of PDMS nanocomposites obtained with the reactive carbon nanofiller: (4‐vinylbenzyl) aziridine‐SWCNT

Polymer Composites, Год журнала: 2025, Номер unknown

Опубликована: Апрель 23, 2025

Abstract Surface functionalized single‐walled carbon nanotubes (SWCNT) with 4‐(azidomethyl) styrene were prepared through [2 + 1] nitrene cycloaddition reaction. 53 molecules of (4‐vinylbenzyl) per 1000 atoms obtained. Sidewall covalent functionalization was confirmed by spectroscopic techniques (FTIR, Raman, and XPS) TGA. According to Raman XRD spectroscopy, the integrity CNT preserved, suggesting that aziridine rings help restore aromaticity over structural defects. The reactive moiety on aziridine‐SWCNT reacted PDMS during cross‐linking process vinyl or aryl peroxides (dicumyl peroxide (DCP), (T29) (T145) from Akzo Nobel Chemicals). Testing specimens composites integrated 0.7 grams one hundred obtained according ASTM D‐624 standard method after its processing in an open roller mill followed compression molding. When compared vulcanization, up 35% reductions vulcanization time ( v.t .) observed use as a filler. Improvements their mechanical properties, 75% tensile strength, 85% elastic limit, 40% tear Shore A hardness when PDC used neat vulcanized same crosslinking agent. Among all aziridine‐SWCNT‐PDMS formulated, those T145 DCP (2.5 phr) exhibited highest level improvement both . physics‐mechanical properties. These findings new opportunities apply nanostructures filler construction conductive piezoresistive flexible stretchable devices. Highlights OP aziridine‐SWCNT. SWCNT (4‐azidomethyl) styrene. sidewall cycloaddition. Fully characterization Significant performance improvements PDMS‐SWCNT nanocomposites.

Язык: Английский

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Development of a multifunctional pressure garment measurement device based on air bladder pressure sensor

Measurement, Год журнала: 2025, Номер 254, С. 117952 - 117952

Опубликована: Май 23, 2025

Язык: Английский

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