Abstract Hydrogel‐based wearable electronic devices have received increasing attention. However, the construction of underwater strain sensors remains a significant challenge because swelling hydrogels in an aquatic environment. This work presents fabrication anti‐swellable hydrogel composed polyvinyl alcohol (PVA), copolymer [2‐(methacryloyloxy) ethyl]dimethyl‐(3‐sulfopropyl) ammonium hydroxide (SBMA) and 2‐hydroxyethyl methacrylate. Interestingly, facile switch SBMA moiety from neutral to...

Ionic gel-based electronic devices are essential in future healthcare/biomedical applications, such as advanced diagnostics, therapeutics, physiotherapy, etc. However, considerable efforts have been devoted to integrating ultrahigh stretchability, transparency, self-adhesion, and a low-cost manufacturing process one material for dealing with variety of application scenarios the real world. Here, we describe an ionically conductive hydrogel-based technology by introducing charge-rich...

This study builds on the practice of using waste rubber to improve ductility cement mortar and further explores potential vinyl acetate-ethylene (VAE) in enhancing (RM). It systematically analyzes effects VAE workability, mechanical properties, crack resistance, microstructure RM. Additionally, isothermal calorimetry was employed investigate mechanism VAE's influence hydration heat. The results show that significantly improves flexural strength, tensile ultimate strain RM, while reducing its...

Enterovirus 71 (EV71) is identified as the primary cause of hand, foot, and mouth disease (HFMD) mainly infects young infants. Though some fatal cases have been reported, underlying mechanisms EV71 infection remain elusive more further pathologic molecular studies are needed.A 26-month-old girl with a history fever lethargy for 3 days intermittent seizures 2 hours associated rash on 4 limbs was brought to hospital.The autopsy performed identify death medical dispute. The results histologic...

A DMSO/H₂O binary solvent strategy is developed for tuning microstructures and performances of macromicelle-crosslinked hyaluronate hydro/organo-gels.

This paper developed a MEMS based electrochemical seismometer featured with new structure of sensing electrodes. The electrodes in this study can significantly increase the working areas cathodes, and accurately control geometries insulation layer. In comparison to previously reported counterparts, proposed is 1) simplification device fabrication process 2) an sensitivity. devices performance was test by vibration table produced sensitivity 4100V/(m/s).

C/C composites are being used as high-temperature structural material due to the superior characteristics of low density, high specific strength, thermal conductivity, expansion coefficient and excellent anti-ablation. The state research into manufacturing processes Carbon-Carbon is critically reviewed with emphasis in this paper. include several kinds methods, for example, CVD, CVI, Liquid Impregnation etc. And usages some corresponding methods materials ablation resistant shown paper too....

Abstract With the changes of modern warfare modes and development missiles weapons, battlefield survivability military vehicles is facing severe challenges. Vehicles must have high protection performance better mobility. However, both them are contradictory each other. The advanced resin-based composites has excellent mechanical properties strong designability, one main technical means to solve above problems, but it also encounters a bottleneck. In view these situations, this paper...

Due to the complex compression failure process of fiber composite materials, especially direct bearing situation material end face, it is quite difficult accurately predict it. At present, design performance mainly considers a large safety factor, and assessment method that can meet needs reliable engineering applications still challenge key issue community urgently solve. This article reviews widely studied shear type buckling model, extensional matrix strain theoretical interlayer elastic...

The microstructure of carbon fibers with different properties also varies. Even considerable mechanical properties, the characteristics produced by manufacturers or processes are different. Although current characterization testing methods can provide a fundamental analysis relationship between and fibers, there is still no systematic theory on how to control evolution their during production process develop high-performance high-quality fibers. There certain gap in performance China...

PBO fibers are prone to large deformation under high-speed impact loads, which is conducive energy absorption through fiber tensile and fracture. This article establishes a molecular scale model of microfibers, can deeply understand the phenomenon characteristics damage materials dynamics optimization. It also theoretically predicts structure physical properties such materials, reveals their failure mechanisms, provides technical support for research development military materials.

Abstract Through phase analysis and quantitative calculations of the hydration process, inclusion polyacrylamide (PAM) in Anti-dispersion Water Paste affects its characteristics is discovered. Specifically, presence PAM reduces early reactivity while accelerating progress middle to late stages hydration. By employing K-D kinetic analysis, it confirmed that use results formation a multi-nucleation homogeneous point system within cement slurry. This prolongs NG (nucleation growth) process...

Abstract Ionic diodes with environmentally modulated ion‐rectifying characteristics have attracted much attention and show great promise in the construction of smart devices environmental adaptability. One immediate challenge is to integrate stimuli responsiveness ion rectification into one single ionic diode, which requires a close cooperation chemical principles device technologies. Herein, an diode based on photoresponsive hydrogel optically mediated performances introduced. Relying...

Stretchable electronic devices that conduct strain-related performances have drawn extensive attention, functioning as mechanical sensors, actuators, and stretchable conductors. Although strain-insensitive or strain-responsive nature is well-achieved separately, it remains challenging to combine these two characteristics in one single device, which will offer versatile adaptability various working situations. Herein, a hybrid material with sign-switchable Poisson's ratio (SSPR) developed by...

s: For the problem that cracks exist when advanced materials are attacked or shocked, and hard to self-healing. The microcapsules put forward make great effects on healing some extents. manufacturing methods of reviewed, including Matrix Polymerization, In-situ Cross-linking, Solvent Evaporation Method. And conclusion problems prospected finally.

Mitral annular calcification (MAC) is a chronic, degenerative cardiac condition. Although MAC often considered as an incidental finding in clinical and forensic practice, sudden death due to severe with end-stage renal disease (ESRD) during hemodialysis uncommon. In addition, spontaneous subepicardial hematoma rupture of the vein very rare.A 65-year-old woman had history hypertension, diabetes mellitus, failure.Postmortem examination revealed marked cardiomegaly ESRD. Spontaneous disruption...

A progressive damage method of predicting the fatigue life mechanically fastened joints in fiber-reinforced plastics was established, which is integrated material property degradation models. The equations virtual work based on theory time increment were deduced to analyze stress-strain states under loading conditions. three-dimensional Hashin-type failure criteria introduced into detect for diverse modes. structure catastrophe and sudden rules including correlation among four basic...

This paper presents the design, fabrication and performance of a metal-to-metal contact shunt micro-electro-mechanical (MEMS) switch. The switch was composed fixed-fixed Al_0.96Si_0.04 alloy beam with two pull-down electrodes central dc-contact area. placed in an in-line configuration coplanar waveguide transmission line. best RF shows insertion loss less than 0.3dB isolation greater 35dB for all frequencies up to 10 GHz.

This study presents a resonant pressure micro sensor which is suspended by springs in assembly. Pressures under measurement lead to intrinsic frequency shifts of two resonators, are, however, prone environmental disturbances. The assembly proposed this can minimize the side effects noises and stabilize frequencies resonators. More specifically, response temperature variations, fitting errors sensors with without were quantified as -13 Pa 788 Pa, respectively. In vibrations, decreased from 24 6 help

This paper presents a new electrochemical microseismometer where the viscosity of electrolyte solution was optimized by supplementation with glycerol. The influence on output velocity studied finite element software, and relationship between noise levels analyzed. Next, devices different proportions glycerol were fabricated MEMS process. Finally, experiment working bandwidth measurement test carried out separately. experimental results show that: without frequency compensation, 3dB expanded...

This study demonstrated the feasibility of polymer brushes-modified plate substrate as template to construct multilayer thin films via layer-by-layer hydrogen bonded assembly. The anchored chains controlled surface-initiated atom transfer radical polymerization (SI-ATRP). poly(4-vinylpyridine) brushes functions a multivalent H-acceptor regulate following assembly with H-donors deposition technique. growth mechanism and film natures mediated by from brushes-grafted surface were fully investigated.