Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The purpose of these studies was to evaluate chitosan films impregnated with silver sulfadiazine as potential wound dressings, based on their mechanical properties and the controlled‐release phenomenon. The mechanical properties of such films were investigated under varying plasticizers (glycerol or sorbitol)…
Abstract Various methods of preparation of epoxy resin/clay mixtures, before the addition of the crosslinking agent and curing to form epoxy‐based polymer layered silicate (PLS) nanocomposites, have been investigated to determine their effect on the nanostructure. Organically modified montmorillonite clay was used, an…
Abstract The influence of nanoclay particles on the nonisothermal crystallization behavior of intercalated polyethylene (PE) prepared by melt‐compounding was investigated. It is observed that the crystallization peak temperature ( T p ) of PE/clay nanocomposites is slightly but consistently higher than the neat PE at…
Molecular-scale kinetics of calcium oxalate growth inhibition in the presence of citrate has been investigated using in situ AFM (see lower microstructure image). Theoretical analysis of the data shows that the classic Cabrera–Vermilyea model of step pinning correctly predicts calcium oxalate monohydrate step kinetics…
Abstract Composites of different lignocellulosic materials and high‐density polyethylene were prepared and their long‐term water absorption behaviors were studied. Wood flour, rice hulls, newsprint fibers, and kenaf fibers were mixed with the polymer at 25 and 50 wt % fiber contents and 1 and 2% compatibilizer, respec…
Abstract Poly(vinyl alcohol) (PVA) composites with 10, 20, 33, and 50 wt % of coconut shell (CCS) powder were prepared by aqueous mixing. The solution was casted as films and tested for physicomechanical properties such as tensile, tear, burst strengths, density, moisture content, moisture vapor transmission rate, moi…
Abstract PLLA, PDLLA, and PLGA copolymers have been studied to understand the details of their degradation behavior. All polymers exhibited a homogeneous mode of degradation, with uniform rates of degradation throughout the film. Crystallinity inhibited water absorption and hence retarded degradation. The degradation…
A versatile synthetic method has been developed to incorporate photochromic azobenzene moieties into tetraphenylporphyrin frameworks in an orthogonal fashion, positioning the phenylazo substituents above and below the plane of the macrocycle. Surprisingly, photoisomerization is completely suppressed in the resulting a…
Abstract Raman spectra of eight polycrystalline apatites of the general formula La 10− x Si 6− y M′ y O 26 ± δ with M′ = Al or Fe were obtained at 300 K. Raman spectra of La 10 Si 4 Fe 2 O 26 and La 9.83 Si 4.5 Al 1.5 O 26 were investigated in the range 80–1000 K and 80–623 K, respectively. Tentative assignments of ba…
Organic ligands containing the chelating carbodithioate group are excellent candidates for the surface functionalization of various semiconductor and metal nanoparticles or flat substrates. We provide a simple synthetic scheme for the preparation of a series of regioregular oligo- and polythiophenes containing this fu…
In this article a detailed study of the optical properties of lanthanide doped lamellar nanohybrids synthesized by the "benzyl alcohol route" is presented. The synthetic approach results in the formation of a highly ordered lamellar nanocomposite consisting of yttrium or gadolinium oxide crystalline layers with a conf…
Aluminium alloys of the AA7xxx series can have very high strength but are generally susceptible to localised corrosion. In the present study, the localised corrosion kinetics for different plates of AA7xxx-T6 were investigated in different orientations, using the foil penetration method. Multiple breakdown potentials…
Abstract In this work, we report the low‐temperature phase transition of sodium niobate (NaNbO 3 ) ceramics at the antiferroelectric–ferroelectric phase studied by the Raman scattering technique over the temperature range 10–300 K. The spectral shape indicates that the phase transition occurs at 160 K on the cooling c…
Abstract In this research, highly open‐cell low‐density polyethylene sheet foams are achieved with an annular die by applying various strategies for cell opening, i.e., (i) creation of a structural nonhomogeneity consisting of hard and soft regions with partial crosslinking, (ii) blending of a hard second‐phase materi…
Reactions of 1:13 heteropoly anions [MV13O38](7-) (M = Mn, Ni) and lanthanide cations Ln3+ (Ln = La, Ce, or Pr) produce five isomorphic compounds, which are crystallized in the triclinic crystal system, space group P1, and formulated as [Ln6(H2O)25(MV12O38)(HMV13O38)].nH2O ((1) Ln = La, M = Mn, and n approximately 31;…
Large-scale synthesis of ternary Zn(x)Cd(1-x)S zigzag nanowires was achieved in a one-step metal-organic chemical vapour deposition (MOCVD) process with co-fed single precursors of ZnS and CdS. Their morphologies, structures and optical properties were characterized and confirmed by scanning electron microscopy, high-…
Abstract This work analyzes the physical properties of several paints and the resistance against corrosion that they impart after being modified by adding a conducting polymer. Five different formulations were selected: four polyurethane resins (two varnish and two aqueous based) and one multicomponent system containi…
Abstract Natural rubber (NR) undergoes chemical changes on heat and air ageing. These changes affect its physical properties and as such, affect the service life of the rubber compound. In this study, a vulcanized NR compound of a typical engine mount composition was subjected to thermo‐oxidative ageing at temperature…
Abstract A composite of highly crystalline cellulose was synthesized via a melt‐mixing method with maleic anhydride (MA)‐grafted polypropylene (PP), MAPP, which was prepared by melt‐mixing PP with 0.25–8.0 phr (part of reagent per hundred parts of PP) of MA, and the morphology and tensile properties were examined with…
Abstract A series of NCO terminated polyurethane (PU)–imide copolymers were synthesized by a systematic three‐step process and were chain extended with different diol/diamine chain extenders. In the first step, isocyanate terminated PU prepolymers were prepared by reacting soft segments such as polyester (PE) polyols…