Polyetheretherketone (PEEK) has the potential to replace traditional metallic materials as an orthopedic and dental implant because its elastic modulus is similar natural bone, although intrinsic bioinertness hampers clinical application. In this study, sulfonate groups were introduced onto PEEK surface through a single-step ultraviolet-initiated graft polymerization of vinylsulfonic acid sodium. Diffuse reflectance Fourier transform infrared spectroscopy X-ray photoelectron analyses...

Magnesium slag cementitious material was prepared successfully using the magnesium slag-furnace slag-clinker system and different activators in this paper. The effect of activator on mechanical property studied. hydration microstructure composite cement were analyzed by X-ray diffraction scanning electron microscopy interaction mechanism researched. results show that activity enhanced significantly adding a small amount activator. Combined have best effect. products materials mortar C-S-H,...

The oil-immersed power transformer is the core equipment for energy transmission and distribution system. Assessing condition of Oil-paper insulation system accurately tremendously significant. Polarization depolarization current measurement (PDC), which based on dielectric response, currently widely used assessment as non-destructive testing methods. This paper equivalent model Insulation structure-X model, characteristic parameters extracting in time domain was worked out. Then an...

In order to analysis the polymer mortar performance, with different steel content specimens by compression tests, bending scanning electron microscopy method, test results indicate that: 3% of cement dosage and compared 0%，flexural strength increased 26%, compressive 6%, fold ratio accordingly. However, when is higher than 3%, resulting in large specific surface area cement, has declined.

Iron tailings are mineral wastes obtained from industrial processing and magnetic separation of iron ore. A type superplasticizer with high water reducing rate early strength gaining property is characterized in this study. The influence admixtures, i.e. superplasticizer, agent accelerating agent, on the mechanical strength, setting hardening time foam concrete containing has been investigated. Further, microstructure observed. This study demonstrates high-strength excellent thermal...

The content of water glass in accordance with the size range is a major factor magnesium slag strength. microstructure block orthogonal testing three shows network-like, acicular, cotton wool attached to each other, main hydration products are calcium silicate hydrate, needle-like ettringite and CSH gel, just good combination among cementitious material get ideal strength value. From view differential analysis curve, Ca (OH) 2 decomposed when temperature reaches 500 °C -540 °C, generated by...

Iron tailing is a kind of mineral waste from industrial processing and magnetic separation iron ore, which severely pollute the air, soil property source water. For large scale ponds (dam height >100 m), accident could cause substantial damage. Therefore, it significant to appropriately utilize tailings. The present paper systematically studies possibility complete replacement quartz sand with tailings in polymer modified cement mortar used external wall insulation plaster. effects...

This test is mainly diatomaceous earth mineral admixture to study the content, calcination temperature, time, grinding time on properties of concrete, and through use SEM, XRD other means micro-theory analysis. The results showed that, after or ball mill grinding, concrete used increase strength, improve durability concrete. When diatomite temperature 650 ,content 2%, volcanic activity achieve best value, increased strength increases, increases flattened when rate more than 2h.

Bimetallic Au@Ag nano-sea urchins (Au@Ag NSUs) functionalized with methimazole were synthesized and combined paper tips as efficient surface-enhanced Raman scattering (SERS) substrates for ultrasensitive Cr(VI) detection. The redox reaction...

Abstract Aiming at the problem that coupling fault signal of centrifugal pump presents complexity mutual due to influence various components, and it is easy be affected by surrounding environmental noise, which leads difficulty noise reduction, LMD-FE-IWT reduction method proposed. This first utilizes local mean decomposition (LMD) adaptively decompose vibration signal, calculates fuzzy entropy each component. According entropy, components are divided into two categories: disordered ordered....

As a new self-Insulation wall material, the autoclaved aerated concrete block has many advantages such as lightweight, thermal insulation, waste recycling, low energy consumption, friendly to environment, etc. It is gaining favors in construction market day by day, and been more widely used engineering program. However, faces disadvantages, e.g. large volume deformation coefficient, high water absorption, strength, brittle character, When combination with plain mortar, problems may appear...

The effectiveness of corn straw Fiber, organic polymer latexes, latexes and Fiber blending on vibration damping properties cement-based materials were studied by filling Fiber. functional mechanisms various fillers discussed. experimental results showed that the ratio with is 149.77% higher than pure materials, fiber 152.58% fibers 191.08%, also materials. impact modification microstructure analyzed FTIR SEM.

The linear shear rheological behaviors of polyethylene/montmorillonite (PE/MMT) nanocomposites were investigated by a rheometer. storage moduli (G′) and loss (G″) PE/MMT increase obviously with the silicate loading only 0.1 wt%, this is ascribed to strong interficial adhension. presence MMT leads pseudo-solid-like molecular chain melts confined. For all samples, dependence G′ G″ on ω shows nonterminal behaviors. terminal slope decreases as increased from % 0.8 wt%. However, increases 1.2 wt%...

The theoretical NSA values given by the standards are grounded on assumption that transmit and receive antennas infinitesimal dipole which is inappropriate to measurements. That is. neglects: (1) antenna mutual coupling, (2) factor variations versus height, (3) differences between H-plane directivities for measurement an dipole. Therefore, correction of considered requisite every measurement, especially when tuned dipoles employed. In this paper, factors calculated with method moments at 3m...

Iron tailings are mineral wastes obtained from industrial processing and magnetic separation of iron ore. Foam concrete with can be made tailings, cement, fly ash, silica fume, polypropylene fiber, superplasticizer, early strength agent, accelerating agent foaming agent. The influences fiber on the crack resistance frost foam have been investigated in this study. Further, microstructure was observed. This result demonstrates that has greatly increased concrete. pore structure is improved...

Owing to the disadvantages of traditional mortar with poor antifreeze property，low adhesive strength and short durability in cold region China, facing tiles often fall off lead lost decorative effects protective effects. In this article，a new type for exterior wall tile，polymer cement modified by polymer, is introduced. The advantages are: (l) Better frost resistance，which reflected stability after one hundred cycles freezing thawing; (2) Higher (2.0MPa); (3) permeability resistance longer...

As a kind of high performance concrete, light aggregate concrete has the following advantages, for example lightweight strength, thermal insulation performance, seismic refractory, penetration-proof and so on. This experiment with EPS particles which are made ceramsite waste polystyrene foam plastic as fly ash admixture prepare research influence polymer organic fiber on strength analysis microstructure mechanism, experimental results indicate that can effectively improve interface cement...

In this work, the effect of γ-irradiation on neat polypropylene (PP) and PP with stabilizers have been studied by means wide-angle X-ray diffraction (WAXD) tensile properties. There is a new reflex 300, β-phase, appeared in irradiated sample, compared non-irradiated sample. When T/S ratio are 0.1 wt%/0.1 wt% wt%/0.3 PP, 300 different radiation doses all increased. However content wt%/0.5 not appeared. Among samples which contain stabilizers, stabilization against increased, PP.

Because the fly ash will produce large amounts of secondary waste emission after extraction aluminum, utilization residue aluminum has great significance. The autoclaved bricks studied in this paper use CFB as main material, and calcium carbide clay which consists mainly hydroxide is residua production acetylene gas chemical plants. This analyzes composition, mineral composition microstructure aluminum. In paper, we also study law impacts compressive strength, flexural frost resistance water...