Materials Literature
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Abstract The effects of gamma radiation on the local structure of PVA membranes containing TiO2 were investigated by ESR and XRD methods. An intense ESR signal is observed after irradiation at 16 KGy dose. This signal appears only for irradiated samples and it is associated with the breaking of the polymeric chain, fo…
Novel luminescent poly(styrene) (PS)-graft-/rhodamine 6G (R6G) dye–fluoromica clay hybrids have been synthesized and characterized by XRD, FTIR, TGA, DSC, SEC, UV-Vis, and continuous wave and time-resolved photoluminescence (PL) spectroscopies. The materials have been prepared by a two-step process: (i) co-intercalati…
Slowly degradable copolymers of L-lactide and ε-caprolactone can provide long-term delivery and may be interesting as alternative release systems of cyclosporine A (CyA) and rapamycin (sirolimus), in which available dosage forms cause a lot of side effects. The aim of this study was to obtain slowly degradable matrice…
The activation and adhesion of platelets or whole blood exposed to chitosan (CH) grafted surfaces is used to evaluate the hemocompatibility of biomaterials. The biomaterial surfaces are polyurethane (PU) tubes grafted with an inner poly(acrylic acid) (PAA) and an outer CH or quaternary ammonium modified CH (CH-Q) brus…
Addition of elemental sulfur to the vanadium nitride [(nacnac)V≡N(OAr)] forms the first thionitrosyl complex of vanadium, [(nacnac)V(NS)(OAr)]. Single crystal X-Ray diffraction studies and DFT calculations reveal an almost linear thionitrosyl ligand resulting from an extended π-resonance across the VNS moiety.
The thin films of Nickel Phthalocyanine (NiPc) on glass substrates were prepared by vacuum evaporation at different substrates temperatures (300, 325, 350, 400, 450) K. The structure and surface morphology of NiPc in powder and thin film forms (265 nm) were studied using X-ray diffraction and atomic force microscope (…
The reaction of trivalent DyIII/HoIII, 2,2′:6′,2′′-terpyridine (terpy), and hexacyanometallate [MIII(CN)6]3− (M = FeIII and CoIII) leads to the formation of a series of cyano-bridged complexes (1–4). In the case of DyIII, one-dimensional (1-D) alternating chains [DyIII(terpy)(DMF)2(H2O)2][MIII(CN)6]·3H2O (M = FeIII fo…
Abstract– Within the framework of the Multidisciplinary Experimental and Modeling Impact Research Network (MEMIN) research group, the damage zones underneath two experimentally produced impact craters in sandstone targets were investigated using several nondestructive testing (NDT) methods. The 20 × 20 × 20 cm sandsto…
In the present paper the results regarding the influence of UV-irradiation with 254 nm wavelength on the molecular weight of chitosan are presented. The concentration of chitosan solution was 0.5%(w/w) in 0.1 M acetic acid. The degree of deacetylation, determined by potentiometric titration in an acidic solution by al…
ACTA CHIMICA SINICA [Dy 4 ( 4 -O)] * ( 510275) , : [Dy 8 (bpt) 8
The low energy effective field model for the multilayer graphene (at ABC stacking) is considered.We calculate the effective action in the presence of constant external magnetic field B (normal to the graphene sheet).We also calculate the first two corrections to this effective action caused by the in-plane electric fi…
Wind turbine rotor blades are among the largest composite structures manufactured of fibre reinforced polymer. During the service life of a wind turbine rotor blade, it is subjected to cyclic loading that potentially can lead to material failure, also known as fatigue. With reference to glass fibre reinforced composit…
The increasing environmental concerns and depletion of petroleum resources has forced the researchers around the globe to find new green and advanced materials. In present review, a particular interest was focused on composites, advantages of natural fiber over glass fiber and the effective use of lignocellulosic natu…
abstract Article history:Received 12 October 2013Received in revised form 16 February 2014Accepted 2 March 2014Available online xxxxKeywords:Chitosan nanoparticlesVitamin CNutritionZFL cellsCytotoxicitySolea senegalensis The potential of chitosan-based nanoencapsulation as a tool for delivering ascorbic acid (AA) to m…
MgO-CaO material was generated by using analytically pure Ca(OH)2 and Mg(OH)2 as the raw materials,CeO2 as the dopant and sintered at 1650℃ for 3h with the mixing and pressing of planetary ball mill.Furthermore,XRD and SEM analysis of the sample characterization was performed.According to the results,with the addition…
Coriandrum sativum L. seed extract (CSE) was used as a green inhibitor for corrosion control of 6063 aluminium alloy in 1 M phosphoric acid using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques at the temperature range of 30°C to 50°C. Surface morphology of the metal was studie…
A novel two step polymerization method which combined the advantages of both solution polymerization and emulsion polymerization was proposed for emulsifier-free, waterborne hydroxyl functional polyacrylate with low VOC level. The obtained resin provided a good appearance and moderate viscosity. The structure of resin…
Thermoplastic starch was prepared from potato starch using Glycerol as the plasticizer. It was shown to have modified crystallinity and better thermal stability as compared to native starch. The complexation of the plasticizer with the starch also resulted in a shift of the O-H and C-H bands on the FT-IR spectra indic…
In this work, MoS 2 microsphere was synthesized by hydrothermal reaction, in which thiourea (CS(NH 2 ) 2 ) was used as S-source and reducing agent, ammonium heptamolybdate ((NH 4 ) 6 Mo 7 O 24 .4H 2 O) was used as Mo-source. The influence of temperature, as well as different dispersing agents, on the reaction product’…
Polypyrrole (PPy) coated cotton yarns were prepared by the vapour phase polymerisation technique at various initiator concentrations. Iron (III) chloride (FeCl3) was used as the initiator at four different concentrations (0.2, 0.4, 0.6 & 0.8 mol/l) respectively. In this work, the effects of initiator concentration on…