Publication

Subzero fast self-healing and adhesive violet phosphorene incorporated sodium alginate-based hydrogel as strain sensors

2025

Abstract

Hydrogels are promising materials for wearable electronic devices. However, maintaining the high sensitivity, self-healing, and excellent adhesion of hydrogels at subzero temperatures remains a challenge. The violet phosphorene-polydopamine hybrid (VP-PDA) was introduced into poly (vinyl alcohol)/ethylene glycol/sodium alginate/sodium tetraborate matrix to achieve an anti-freezing hydrogel with high strain sensitivity, extremely high stretchability (3539 %), rapid self-healing capability, and high adhesion even at −60 °C. The hydrogel-based strain sensor has been demonstrated to be significantly enhanced (especially at high strain, GF = 38.83 at 3000 % strain) by the introduction of VP with unique mechanical properties, accurately detecting different strains with quick response (

Official source

https://infoscience.epfl.ch/entities/publication/153caed2-30fd-4c92-8fb5-012b881c8195

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2025

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/153caed2-30fd-4c92-8fb5-012b881c8195

About this result

Related concepts (32)

Strain gauge

A strain gauge (also spelled strain gage) is a device used to measure strain on an object. Invented by Edward E. Simmons and Arthur C. Ruge in 1938, the most common type of strain gauge consists of an insulating flexible backing which supports a metallic foil pattern. The gauge is attached to the object by a suitable adhesive, such as cyanoacrylate. As the object is deformed, the foil is deformed, causing its electrical resistance to change.

Stress–strain analysis

Stress–strain analysis (or stress analysis) is an engineering discipline that uses many methods to determine the stresses and strains in materials and structures subjected to forces. In continuum mechanics, stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material. In simple terms we can define stress as the force of resistance per unit area, offered by a body against deformation.

Strength of materials

The field of strength of materials (also called mechanics of materials) typically refers to various methods of calculating the stresses and strains in structural members, such as beams, columns, and shafts. The methods employed to predict the response of a structure under loading and its susceptibility to various failure modes takes into account the properties of the materials such as its yield strength, ultimate strength, Young's modulus, and Poisson's ratio.

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Subzero fast self-healing and adhesive violet phosphorene incorporated sodium alginate-based hydrogel as strain sensors

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