The rapid development of wearable smart devices has contributed to the enormous demands for smart flexible strain sensors. However, to date, the poor stretchability and sensitivity of conventional metals or inorganic semiconductor-based strain sensors have restricted their application in this field to some extent, and hence many efforts have been devoted to find suitable candidates to overcome these limitations. Recently, novel resistive-type electrically conductive polymer composites (ECPCs)-based strain sensors have attracted attention based on their merits of light weight, flexibility, stretchability, and easy processing, thus showing great potential applications in the fields of human movement detection, artificial muscles, human–machine interfaces, soft robotic skin, etc. For ECPCs-based strain sensors, the conductive filler type and the phase morphology design have important influences on the sensing property. Meanwhile, to achieve a successful application toward wearable devices, several imperative features, including a self-healing capability, superhydrophobicity, and good light transmission, need to be considered. The aim of the present review is to critically review the progress of ECPCs-based strain sensors and to foresee their future development.

Electrically conductive polymer composites for smart flexible strain sensors: a critical review

Biomass-derived nitrogen-doped carbon quantum dots: highly selective fluorescent probe for detecting Fe3+ ions and tetracyclines.

Achieving superior electromagnetic wave absorbers through the novel metal-organic frameworks derived magnetic porous carbon nanorods

There is a growing demand for stretchable strain sensors because of their potential applications in various emerging fields, such as human motion detection, health monitoring, wearable electronics, and soft robotic skin. Recently, strain sensors based on flexible conductive polymer composites (FCPCs) composed of conductive materials and a stretchable elastomer have received intensive attention owing to their high stretchability, good flexibility, excellent durability, tunable strain sensing behaviors, and ease of processing. Here, we systematically summarize the recent progress of stretchable strain sensors based on FCPCs. This review covers the classification and sensing mechanisms as well as the influence of multiple factors on the sensing behaviors of FCPC based strain sensors with detailed examples.

An overview of stretchable strain sensors from conductive polymer nanocomposites

Uranium is the main element for nuclear energy production and is one of the most hazardous radionuclides; its effective enrichment plays a key role in energy strategy and environmental safety. Oxime-functionalized nanostructures are the most promising candidates for uranium adsorption. However, current methods for their preparation mainly focus on multistep grafting and oximation processes, and the nanostructures usually show low efficiency. Here, we report a rapid one-step process to synthesize salicylaldoxime/polydopamine modified reduced graphene oxide (RGO-PDA/oxime) via the polymerization of dopamine (DA) and simultaneous deposition of oxime with an obviously decreased total synthesis time of 2 h. The obtained maximum uranium adsorption capacity of up to 1049 mg g−1 was 3–16 times larger than those of the reported single PDA or oxime modified nanostructures. The RGO-PDA/oxime followed the pseudo-second-order kinetics model and Langmuir isotherm equation with much higher adsorption selectivity and recyclability. The outstanding sorption performance is attributed to the electrostatic repulsion between GO and salicylaldoxime and the effective combination between PDA and oxime molecules. Finally, given the adhesion capability of DA to diverse surfaces, this rapid one-step method was used to prepare five other oxime/PDA modified materials, which also showed improved uranium adsorption efficiency. These findings provide a way to obtain oxime-functionalized nanostructures with promising uranium adsorption efficiency.

Highly efficient uranium adsorption by salicylaldoxime/polydopamine graphene oxide nanocomposites

The structural, elastic, electronic properties and Debye temperature of D022-Ni3V under pressure from first-principles

The structural, elastic, electronic properties and Debye temperature of Ni3Mo under pressure from first-principles

Forecasting method for shrinkage cavity porosity of aluminum alloy low-pressure casting

The invention relates to a preparation method of an aluminum, copper and iron quasicrystal. In order to solve the problem that process defects exist as the preparation method of the aluminum, copper and iron quasicrystal is difficult, the preparation method comprises the following steps: smelting and casting, quickly cooling, thermally treating and annealing and quenching to prepare an aluminum, copper and iron quasicrystal block material by adopting a medium-frequency induction smelting furnace casting method. The preparation method of the aluminum, copper and iron quasicrystal disclosed by the invention is advanced in process, accurate and full in data; the I phase of the quasicrystal is Al61.92Cu26.21Fe11.87, the product purity is high, the I phase content of the quasicrystal is 98%, the mechanical performances are stable, the hardness is 796HV, and therefore, the preparation method can be applied to various industrial fields and is a very ideal preparation method of the aluminum, copper and iron quasicrystal.

Preparation method of aluminum, copper and iron quasicrystal

The invention discloses a flux-free smelting method for AZ31 magnesium alloy and solves the problems of inclusion, pores and environmental pollution in the conventional AZ31 magnesium alloy smelting method The flux-free smelting method comprises the following steps of: a, preheating a graphite, loading, and introducing tetrafluoroethane mixed gas for smelting; b, alloying and performing cost analysis; c, rotationally blowing argon for refining an alloy solution; and d, removing impurities, filtering by using a MgO foamed ceramic filter, and pouring for forming A combined purification process of rotationally blowing the argon and filtering by using MgO ceramics under the protection of the tetrafluoroethane mixed gas is adopted, the ductility and toughness of the magnesium alloy are improved, the magnesium alloy is promoted to expand to the field of deep processing such as press working and the like, and the application range of the magnesium alloy is widened; the purity and mechanical properties of the AZ31 magnesium alloy are greatly improved, the tensile strength and elongation are improved from 15265MPa and 32 percent before refining to 17745MPa and 8 percent, and are improved by 16 percent and 150 percent; meanwhile, the environmental pollution is reduced

Jin Yuchun

Papers

The structural, elastic, electronic properties and Debye temperature of D022-Ni3V under pressure from first-principles

The structural, elastic, electronic properties and Debye temperature of Ni3Mo under pressure from first-principles

Forecasting method for shrinkage cavity porosity of aluminum alloy low-pressure casting

Preparation method of aluminum, copper and iron quasicrystal

Flux-free smelting method for AZ31 magnesium alloy