Materials Literature
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There are more than 100,000 tonnes of nuclear waste currently stored in the UK, waiting for final disposal. Composite cements consisting of Portland cement (PC) and blast furnace slag (BFS) have a good track record in encapsulation of a range of nuclear wastes. However, the pH of this system is relatively high (~13.3)…
In this chapter, some recent developments of halogen-free flame retardancy of polycarbonate (PC) and its blends are reviewed. Conventional halogen-free flame retardants used in PC and its blends include phosphorus-containing compounds, siloxanes and sulfur-containing compounds. In the conventional category, some compo…
Batch ARGET ATRP of butyl methacrylate (BMA) and butyl acrylate (BA) was systematically investigated over a range of initiator, catalyst, and reducing agent loadings to produce material with a target molecular weight of 5,000 g·mol -1 . Reducing copper catalyst loading to 36 molar ppm with respect to monomer (800 chai…
A history of severe allergic reaction to iodine contrast leading to anaphylactic shock presents a dilemma in patients requiring cardiac catheterization. As an alternative, gadolinium has been an interesting and potentially useful agent. However, gadolinium produces poor image quality and has been associated with signi…
An exponential increase in the utilization of petroleum for transportation fuels, energy and industrial chemicals that has taken place over the past several decades is widely accepted as being unsustainable. Additionally, increased concerns about the environment and global warming have given rise to worldwide efforts…
Polypropylene/sepiolite and PP/organo-sepiolite composites were prepared via melt extrusion, sepiolite was pre-modified with cetyltrimethyl ammonium bromide (CTAB). X-ray diffraction, transmission electron microscopy were used to characterize the morpohlogy of composites. Thermal stability and flame retardancy of the…
In the present work, pure CdS and Ni doped CdS nanoparticles have been synthesized by chemical co-precipitation method using thiophenol as a capping agent. The frequency dependent dielectric dispersion of pure CdS and Ni doped CdS nanoparticles are investigated at room temperature in the frequency range of 100 Hz - 1…
The purpose of this study was to prepare new nanocomposite catalysts of Metal/LDHs type by mild reduction of transition metal cations Co 2+ and Cu 2+ substituted in the matrix of ZnAl-LDH at 150°C and atmospheric pressure, under hydrogen flow.To this end, a series of ZnCuCoAl layered double hydroxides (LDH) precursors…
Durch die Integration von multifunktionalen Komponenten in Verbundwerkstoffe ist es möglich, eine neue Generation von Strukturen und Bauelementen zu realisieren, die sowohl sensorische bzw. aktorische Eigenschaften aufweisen als auch selbstregulierend auf äußere Einflüsse reagieren. Christian Paul stellt die Integrati…
Optical absorption in MnGaInS4 single crystals has been studied. Direct and indirect optical transitions are found to occur in the range of photon energies of 2.37–2.74 eV and in the temperature range of 83–270 K. The temperature dependence of the band gap has been determined; its temperature coefficients E gd and E g…
OBJECTIVES: An enhanced worldwide application of platinum group elements (PGE), in particular platinum, has been observed during recent decades. An increased concentration of PGE was determined in collected samples of great amount of aqueous ecosystems.The aim was to compare phytotoxic effect of platinum (PtCl4) by pe…
Hydrogels can be formed by the self-assembly of certain small molecules. Many of these hydrogelating molecules assemble under specific conditions into nanofibers. The entanglement of these fibers leads to the matrix of the gel. Preparing gels with reproducible properties requires careful control of the self-assembly.…
Nano-fibrous scaffolding mimics aspects of the extracellular matrix to improve cell function and tissue formation. Although several methods exist to fabricate nano-fibrous scaffolds, the combination of phase separation with reverse solid freeform fabrication (SFF) allows for scaffolds with features at three different…
Based on the obtained volumetric-axial strain curves of marble with pre-existing fissures under different confining pressures,the effect of confining pressures on dilatancy behavior of marble with pre-existing fissures is analyzed.The results show that the crack damage thresholds of intact and pre-cracked marble all i…
Using the bridging role of tolylene diisocyanate(TDI),poly(vinyl alcohol)-g-tolylene diisocyanate-fatty alcohol copolymers were synthesized with the fatty alcohols as the thermal storage units along the PVA backbone via the method.The thermal storage behavior,thermal stability and crystalline structure of PVA-g-TDI-C(…
According to the present situation of inspection of the insulators in transmission lines,based on reviewing the related inspection at home and abroad,and combined with optical fiber sensing technology and composite insulator technology,the intelligence rod structure of the composite insulator was developed by embeddin…
The effects of EGR on the combustion and emission characteristics were investigated experimentally in a gasoline direct-injection(GDI) engine.Results show that the introduction of EGR leads to an increase in combustion duration.With the increase of EGR rate,ignition timing shows an advance and then delay behavior,and…
In order to investigate the temperature characterize and heat generation mechanism of a cylindrical power secondary battery using graphite and LiFePO4 as anode and cathode,its surface temperature change at different discharge rates were studied by a automatic charge and discharge device.Moreover,its heat generation ra…
The paper attempts to model a three phase squirrel cage induction motor and using Finite Element Method to obtain the finite element field solutions. The linear time harmonic vector field potential solution is used for the inductance determination. The Finite Element Analysis software used is FEMM.
We proposed a differential equation for predicting the hot-spot temperature(HST)after taking the thermal dynamic effect of load and the effects of top-oil temperature variations into account.Meanwhile,we employed the kalman filter method to establish a real-time estimation model for hot-spot temperature by means of st…