Materials Literature
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Investigation of the influence of the purified and acid treated attapulgite (ATP) contents on the ultradrawing properties of ultrahigh molecular weight polyethylene/purified attapulgites (UHMWPE/ATP, F 100 A y ) and UHMWPE/acid treated ATP (F 100 A xM-y ) as-prepared fibers is reported. In which, acid treated ATP nano…
Glasses with composition (in eq.%) (30 − x ) Ca : x M:55Si:15Al:80O:15N:5F have been prepared with different levels of substitution of Ca 2+ cations by Mg 2+ , Y 3+ , Er 3+ , or Nd 3+ . The properties of these glasses are examined in detail and changes observed in molar volume ( MV ), free volume, fractional glass com…
Two new figures of merit for powder indexing solutions are proposed: the reversed figure of meritMnRevand the symmetric figure of meritMnSym. These are naturally suggested by the theory underlying the de Wolff figure of meritMn. Nevertheless,MnRevhas characteristics opposite to those ofMnwith regard to sensitivity to…
This paper reports the results of precision structural-morphological study of kaolinite from clayey rocks taken in various areas of the Voronezh anteclise subjected to different stages of lithogenesis: primary kaolins of the weathering crust, proluvial-talus and lacustrine secondary kaolins, as well as lacustrine-swam…
The evolution of polyethylene/organoclay nanocomposite microstructure via shear and extentional flow fields was studied by tracing rheological behavior and nonisothermal crystallization kinetics. Although studying microstructure formed through flow fields, two phenomena were noticed: the breaking of three‐dimensional…
The present study explored the ecotoxicology of single-walled carbon nanotubes (SWCNTs) and their likely interaction with dissolved metals, with a focus on the effect of in vivo exposure in marine mussels. Any nano-scale effects were negated by the tendency of uncoated SWCNTs to agglomerate in water, particularly with…
In this article, the synthesis and growth mechanism of CaWO 4 : Eu 3+ hierarchical dumbbell‐like and double‐broccoli‐like microstructures via a surfactant‐free hydrothermal process are studied. Results show that morphology of the product is time‐dependent under proper pH = 7. The formation of double‐broccoli‐like micr…
Abstract Advanced silica/lignin hybrid biomaterials were obtained using hydrated or fumed silicas (Aerosil®200) and Kraft lignin as precursors, which is a cheap and biodegradable natural polymer. To extend the possible range of applications, the silicas were first modified with N-2-(aminoethyl)-3-aminopropyltrimethoxs…
The development of functional substrates to direct cellular organization is important for biomedical applications such as regenerative medicine and biorobotics. In this study, we prepared freestanding polymeric ultrathin films (nanofilms) consisting of poly(lactic acid) (PLA) and magnetic nanoparticles (MNPs), and eva…
Transparent lead‐free electro‐optic (EO) ceramics ( K 0.5 Na 0.5 ) 0.9 Li 0.1 Nb 0.9 Bi 0.1 O 3 have been fabricated by pressureless sintering. The ceramics have a fine‐grained structure and cubic‐like symmetry. The comodification with Li and Bi induces a diffuse phase transition, causing the ceramics become relaxor‐l…
Abstract The functionalization of poly(ethylene terephthalate) (PET) surface films by reactions with multifunctional amines such as triethylenetetramine (TETA), and tetraethylenepentamine (TEPA) was investigated. For the functionalization of PET films surface we used a new way of treatment, a “sandwich model”. Physica…
Bi0.9La0.1Fe1−xCrxO3 (x=0.03, 0.05 and 0.07) thin films were deposited on LaNiO3/Si and quartz by RF magnetron sputtering, respectively. X-ray diffraction patterns indicate that all phases belong to BiFeO3, and no secondary phase is detected. Three A1 modes and six E modes of the films are observed in Raman scattering…
Hybrid nanofibers of poly(lactic acid) and polycaprolactone have been developed by embedding cancerous drug through electrospinning technique. The composition of polymer has been varied to check the compositional effect on properties. The quality of nanofibers has been testified through surface morphology, wetting pro…
Nanotechnology is essentially related with the synthesis of nanoparticles of varying size and shapes. With the search of environment- friendly protocols for the synthesis of nanoparticles a diverse group of biological agents have been emerged. These biological agents are safe, eco-friendly and lead to green synthesis…
Atomic-scale simulations are performed to study the effect of solute segregation on the shear-induced motion of select grain boundaries in the classical $α$-Fe/C system. At shear rates larger than the solute diffusion rate, we observe a transition from coupled motion to sliding. Below a critical solute excess, the bou…
We develop an effective potential approach for assessing the flow of charge within a two-dimensional donor-acceptor/metal network based on core-level shifts. To do so, we perform both density functional theory (DFT) calculations and x-ray photoemission spectroscopy (XPS) measurements of the core-level shifts for three…
選擇性觸媒還原法是利用NH3為還原劑，將NOx還原為N2以及H2O，目前觸媒技術也應用在戴奧辛之去除與汞的氧化。本研究以MCM-41作為觸媒載體，利用不同合成方法製備觸媒轉化戴奧辛、NO以及汞，藉由MCM-41之高比表面積及高分散性以提升觸媒對污染物之轉化催化效率，達多重污染物控制之目標。 研究結果指出在NO去除方面，空間流速、氧含量及觸媒之活性相配比皆會影響NO去除效率，以含浸法合成之5 wt%V2O5/MCM-41 (5VMIWT)觸媒於400oC對NO去除效率達70.7%。副產物測量顯示，操作溫度由250oC上升至400oC時，開始有N2O之生成；當空間流速從10000 hr-1增加至20000 hr-1時，N2O生成量由3…
This work studied the immiscible blend of elastomeric poly(methyl methacrylate) (PMMA) with poly(ethylene terephthalate) (PET) bottle grade with and without the use of compatibilizer agent, poly(methyl methacrylate-co-glycidyl methacrylate - co-ethyl acrylate) (MGE). The characterizations of torque rheometry, melt flo…
13.220.01
Nas últimas décadas, os materiais luminescentes têm despertado um grande interesse por parte da comunidade científica e, atualmente são foco de inúmeras pesquisas, devido principalmente às suas características peculiares e ao número crescente de aplicações nas áreas tecnológicas e biológicas. Neste contexto, a propost…