Materials Literature
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The purpose of this study is to investigate the change in chemical structures of \n \nbiopolymers PLGA 80:20 and PLLA during thermal and oxidative degradation \n \nby the means of in-situ Raman spectroscopy monitoring. Both isothermal and \n \nnon-isothermal testing, with or with little presence of oxygen, will be con…
In this paper the tribological behaviors of PTFE against GCr15 steel in air, distilled water, sea water and 3.5 wt.% NaCl solution were comparatively investigated. The influence of sea water composition on the tribological behavior of PTFE was also studied. Results show that the friction process in sea water was relat…
Hydroxyapatite-encapsulated g-Fe2O3 nanoparticles functionalized with diethyl aliphatic amine basic ionic liquids were synthesized and used as efficient magnetic catalysts for aqueous Knoevenagel condensation reactions. Quantitative conversion of the reactants was achieved under mild conditions; recycle of the catalys…
The synthesis of poly(2,2'bithiophene) was carried out utilizing the Epsilon 2000 cyclic voltammeter. In order to incorporate the mercuric ion into the polymer matrix, the polymer was grown on an Iridium Oxide conductive glass, immersed into a solution of 0.005M HgSO4 for 15 minutes. The mercuric ion became covalently…
The conformation of the materials for scintillation applications is very important because it determines the applicability and cost of ionizing radiation detectors devices. Polymeric composite films have been studied due to their properties like flexibility and control of shape and dimensions. In this work, we related…
Although, several researches on synthesis and characterization of benzoxazines and polybenzoxazines have appeared in the literature, detailed studies on thermal characterization are still limited. In this study, polymerization and thermal degradation mechanisms of benzoxazines were investigated via direct pyrolysis ma…
Spider silk has become a benchmark for modern polymer fibres and extensive research is being devoted to understanding and, eventually, copying these silk fibres [1]. It is an exceptional material; produced by the animal under ambient temperatures and pressures, and with water as solvent, and yet with mechanical proper…
Phenol is a very important pollutant in wastewater treatment because it is a toxic even in low concentration and widely used in chemical industry [1]. Many researches have been studied to removal phenol in a long time. One of method is advanced oxidation process (AOPs) which is chemical treatment to oxidize organic an…
Oxygen deficiency in the iron-based HTSC GdFeAsO 1− seems to create a parallelogram shaped Fe 2+ -ion/oxygen deficiency pattern in the Fe2O2 plane in c-direction. These two-dimensional nanostructures form superconducting current channels which are separated by h = 0.828nm. The doping distance in direction of the super…
The method of molecular dynamics was used for simulating ion bombardment on the tita- nium nanoclusters with pair interatomic interac- tion (Morse potential). The energy of the bombard- ing particles varied from 100 to 1000 eV. The ion- cluster interaction was studied for various impact parameters. The ion energy dist…
Woven fabrics are an integral part of key defense and structural systems, including personal protection (body armor) and vehicles (HMMWV). Textile-based armor, for example, has proven an effective substitute for heavier materials. With the proliferation of such materials, the demand for computationally efficient model…
Hyperbranched thermosetting polyurethanes have been prepared by pre- polymerization technique using poly(e-caprolactone) diol (PCL) as macroglycol, monoglyceride of Mesua ferrea l. seed oil as chain extender, and glycerol as the trifunctional polyol with toluene diisocyanate (TDI) followed by crosslinking with epoxy r…
The description of the extended angular jump model offered by the author in order to approximate the hindered motion of small molecules in crystals and liquids is given. The idea of a continuous distribution of instantaneous orientations of the molecules, assumed as a basis of the model of rotational diffusion of Deby…
Based on the seam-defect appearing on the plate edge of rough-rolling medium billet in the Meishan Iron and Steel Companys hot-rolling units, the five-pass reversible vertical-horizontal rolling of different vertical roll shapes process is simulated numerically. The results show that groove vertical rolls rolling can…
Two examples of SWCNT-based molecular scale nanostructures are shown. The ring structures were fabricated with both SWCNT ends connected chemically. The scanning tunneling spectroscopy (STS) revealed a standing-wave pattern along the ring at a liquid nitrogen temperature, indicating the ballistic nature of the ring. A…
High hardness ceramic coatings like titanium nitride (TiN) and titanium carbonitride (TiCN) have been considered as alternatives to increase fatigue and wear strength of metallic materials used as orthopaedic implant devices. These films are mechanically suitable and intrinsically biocompatible, highly desirable featu…
The mechanical properties of compacted graphite iron have brought many improvements for the use of diesel engine blocks, due to the fact that with this material high pressure can be obtained in combustion chambers, what decreases fuel consumption and pollutants' emission levels. Usually, alloy elements can be added, w…
The purpose of the present study is to develop a good solubilization vehicle for various poorly soluble drugs via hydrotropic solubilization. To achieve this goal, we discovered a new hydrotrope, DMBA and it showed more than 1000-fold solubility enhancement of 13 poorly soluble compounds which have a broad range of hy…
In this paper, flrst, we theoretically demonstrate a grounded slab of biaxially anisotropic metamaterial can support surface waves. Speciflc conditions for the existence of surface waves at the interface of the slab are investigated using graphical method, and it is shown that these conditions are greatly dependent on…
X-ray powder diffraction and magnetic susceptibility measurements show that Ag(pyz){sub 2}(S{sub 2}O{sub 8}) consists of 2D square nets of Ag{sup 2+} ions resulting from the corner-sharing of axially elongated AgN{sub 4}O{sub 2} octahedra and exhibits characteristic 2D antiferromagnetism. Nevertheless, {mu}{sup +}Sr m…