In order to solve difficulties in the construction of composite steel-reinforced concrete structures, rebar cage is replaced with steel fiber form a and fiber–reinforced (SSFRC) structure. Pushout tests 20 square specimens were carried out study load transfer mechanism SSFRC, load-slip curves obtained. The failures all divided into four modes. bonding stress on interface was analyzed thoroughly, as result, full-stage bond slip could be five stages limit states. Values for three forces...

Deep tumor penetration, long blood circulation, rapid drug release, and sufficient stability are the most concerning dilemmas of nano-drug-delivery systems for efficient chemotherapy. Herein, we develop reduction/oxidation-responsive hierarchical nanoparticles co-encapsulating paclitaxel (PTX) pH-stimulated hyaluronidase (pSH) to surmount sequential biological barriers precise cancer therapy. Poly(ethylene glycol) diamine (PEG-dia) is applied collaboratively cross-link shell self-assembled...

In order to investigate the internal curing effect of recycled brick aggregate (RBA) in concrete (RAC) and calculate its contribution final compressive strength, two RAC groups with different aggregates 6 replacement ratios (r) under 4 ages were tested. Results show that strengths RACI RACII decrease steadily increase r when below 40%, there is a significant drop once higher than 60%. The for low RBA ratio mainly reflected during age 14-21 days, while high ratio, this appears earlier, 7-14...

ABSTRACT Poly(ethylene glycol) diglycidyl ether‐furfurylamine (PGFA) containing pendant furan was synthesized, and a series of crosslinked materials with thermally reversible capacity were synthesized through furan/maleimide Diels–Alder (DA) reaction between PGFA bismaleimide (BMI). The kinetics the PGFA/BMI DA studied by Fourier transform infrared spectroscopy (FTIR). conversion rate, rate constant, energy at different temperatures calculated. In addition, retro (rDA) via 1 H‐NMR,...

In order to avoid certain construction difficulties in a traditional steel reinforced concrete (SRC) structure, like the interference between reinforcing and rebars or poor pouring quality, steel–steel fiber–reinforced (SSFRC) was proposed by removing from SRC incorporating fibers. According standard push-out test of 36 specimens, this paper studies bearing damage mechanism bond interface (SFRC). The results show that splitting cracks usually elongate surface while bonding tips flange toward...

Abstract The Enhanced Geothermal System (EGS) is an artificial geothermal system that aims to economically extract heat from hot dry rock (HDR) through the creation of reservoir. Chemical stimulation thought be effective method create fracture networks and open existing fractures in rocks by injecting chemical agents into reservoir dissolve minerals. Granite a common type rock. In this paper, series experiments were implemented using acid alkaline under high temperature pressure conditions...

Two new multi-resonance (MR) blue emitters with benzothiophene within B/N skeletons exhibit emissions narrow FWHMs, achieving high PLQYs and long device lifetimes.

Hydrogels based on physical interactions have been extensively studied due to their special network structure and excellent mechanical properties. In this paper, a series of hydrogels hydrophobic were prepared via the free-radical copolymerization acrylamide polymerizable amphiphilic monomers dodecanol polyoxyethylene (n) acrylates (AEO-n-AC, n = 3, 7, 9, 15, 23) by simple facile method. The single-network cross-linked self-assemble AEO-n-AC micelles acting as cross-linkers exhibited great...

Chemical stimulation has been increasingly applied to improve the performance of geothermal reservoirs since early 1980s. The potential for successful application this technique high-temperature hosted in granitic rocks is still uncertain, and one keys assess investigate experimentally geochemical reactivity induced via chemical on relevant rock specimens. On premise, we combined high-pressure dynamic simulation static corrosion experiments explore effect different stimulants permeability...

Fatigue damage is one of the main reasons failure Semi-Submersible platform. As complex random loading, it difficult to analyze fatigue life accurately and determine sensitivity parameters. In this paper, on key-components semi-submersible platform analyzed with Spectral-based analysis method. Firstly, stress responses whole model under wave loads are calculated. The calculation results for cut-boundary interpolation used in local calculate key-component model. Generating energy spectrum by...

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The development of flexible photodetectors is crucial for advancing wearable electronics and optoelectronic systems, but it faces significant challenges, such as maintaining high performance under mechanical strain achieving cost-effective fabrication. Here, we fabricated a photodetector using poly(N-vinylcarbazole) (PVK) microwire arrays through template-assisted method. resulting devices exhibit responsivity exceptional flexibility, with the ability to maintain their photoelectric...

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In this work, a cam-roller follower system is studied with its lubrication condition. First of all, we analyze kinematic parameters whole diesel engine valve via numerical equations. The analysis results include velocity and acceleration. EHL model provide the for prediction such as minimum film thickness at specified cam angle, maximum pressure, distribution over all angle. last work in paper predicting working life according to above results. condition under actual conditions evaluated,...

The phase behaviors of poly(sulfobetaine methacrylate) (polySBMA) in various concentrations NaCl aqueous solutions at critical transparent state were investigated utilizing UV–vis analytical techniques. effects the molecular weight and temperature on behavior polySBMA discussed detail depending relationship between concentration NaCl, structural unit, molar ratio (RC) to unit. results demonstrate that there exists a positive polymer effect transparency. A weight, unit was obtained, which...

Abstract Reversible materials have been extensively studied for their good application potential. In this work, a series of with thermal reversible properties were synthesized by Diels‐Alder (DA) reaction furan/BMI. The main structure the thermoreversible polymer was poly (propylene glycol) diglycidyl ether (PPGGE) which chain‐extended furfurylamine. Bismaleimide (BMI) set as crosslinking agent. conversion rates DA and retro‐DA calculated Fourier Transform Infrared Spectroscopy. material...