Materials Literature
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Effects of the temperature, pH value and CO2 partial pressure on the corrosion rate of P110 oil tube steel in CO2-saturated solution were studied by using the weight loss method. The corrosion products formed on P110 steel's surface were observed by scanning electron microscopy (SEM) and their compositions were analys…
As the material used for fuselage structure must possess low density, high strength to weight ratio, the selection of appropriate materials for fuselage structure is one of the most important tasks. Aluminum metal itself is soft and low in strength. It can be made stronger by giving proper combination of suitable allo…
The mechanical properties of flame-retardant high-density polyethylene/ethylene vinyl-acetate copolymer/magnesium hydroxide (HDPE/EVA/Mg(OH)2) composites for cable materials are usually poor due to the high loading of the filler. In this study, high-energy electron beam irradiation was applied to HDPE/EVA/Mg(OH)2 comp…
Two series of mesogenic molecules have been simulated using molecular dynamics with a full atomistic representation. The two series differ from each other only with the orientation of an ester linker inside the rigid core. Experimentally, this small difference leads to drastically different polymorphisms: one displays…
Regioselectively substituted 2,3-di-O-methylcellulose (23MC) was used as cellulose model in blends with alkylketene dimer (AKD). The interaction between sizing materials (AKD and its hydrolyzed product, h-AKD) and cellulose were examined by the analyses of FTIR spectroscopy. This model study showed that the primary hy…
A versatile, generally applicable synthetic methodology for side-chain NLO polycarbonates was developed. This represents the first example of covalent incorporation of NLO chromophores to a prepolymerized polycarbonate backbone. This methodology allows to adjust the polymer backbone structure and to vary the chromopho…
A systematic study on the structural properties of para-phenylene oligomers based on the self-consistent charge density-functional tight binding approach (SCC-DFTB) and its time-dependent (TD) version is presented. Our goal is to investigate the applicability of DFTB for the present class of compounds and to use its c…
The thermal stability and flame retardancy of a new kind of rigid polyurethane (PU) foams/organoclay nanocomposites developed by our research group were investigated by using thermogravimetry analysis (TGA) and cone calorimeter test. Results indicate that compared with pure PU foams, rigid PU foams/organoclay composit…
Through synthetic architecture and functionalization with self-assembled monolayers (SAMs), complex nanocomposite films of SAM/Pt/ZnO/SiO2 have been facilely prepared in this work. The nanostructured films are highly uniform and porous, showing a wide range of tunable wettabilities from superhydrophilicity to superhyd…
Two simple and straightforward procedures for determining the organic content of hybrid silica materials by means of conventional NMR and GC/MS techniques are described. The methods involve dissolving the hybrid material either in a concentrated solution of sodium hydroxide in deuterated water containing a suitable re…
We examine how the fluid-fluid phase behavior of a model colloid-polymer mixture evolves with variation of polymer size and/or interaction strength. Polymer-polymer interactions are approximated through Gaussian-core potentials while colloid-colloid and colloid-polymer interactions are assumed purely hard. Grand canon…
We study the radial breathing mode (RBM) of resonant single walled carbon nanotubes within individual bundles. As strain is applied, significant debundling of the nanotubes occurs, causing an upshift in the RBM frequency. The RBM frequency is found to change irreversibly with strain, correlating more strongly with the…
We observed the formation of unique rod-like microstructures by self-assembling of random mica platelets with a high aspect-ratio and counterion charged. The platelets are polydisperse with dimensions of 300−1000 nm in width and 1 nm in thickness and are prepared from the exfoliation of layered synthetic-fluorinated-m…
The energy levels and the Stokes shift of the excited $4{f}^{1}5{d}^{1}$ states of ${\text{Pr}}^{3+}$ ions doped into ${\text{LaPO}}_{4}$ are calculated using a combined theoretical approach. The local structure of the rare-earth site in ${\text{LaPO}}_{4}$ is obtained from first-principles calculations, while the $4{…
Organoclay filled natural rubber (NR) nanocomposites were prepared using a laboratory two-roll mill. The effect of organoclay loading up to 10 phr was studied. The vulcanized nanocomposites were subjected to mechanical, thermal, and swelling tests. The results indicated that the tensile strength and elongation at brea…
Magnesium hydroxide [Mg(OH)2] is one of the potential inorganic fillers. In this work, nanoparticles (37±5 nm) of the magnesium hydroxide were prepared using matrix-mediated growth and control technique, and their size was confirmed by X-ray diffraction technique. Nano-Mg(OH)2-SBR and nano-Mg(OH)2-PBR composites with…
Starting from brownmillerite SrCoO 2.50, a series of SrCoO 3−δ samples with different oxygen contents up to 3 − δ = 2.87 was successfully prepared using Br 2 in CH 3 CN/H 2 O medium as an oxidant. Six different phases, including the precursor phase, were identified depending on the oxygen content. Four of the phases h…
Surface chemical properties of metal nanoparticles must be tunable to create chemical specificity and are a key prerequisite for successful sensing and imaging platforms. To relate surface enhanced Raman scattering (SERS) to electrostatic field force, a simple colloidal chemistry approach has been deliberately exploit…
Mercury(II) ion and 5,10,15,20-tetrakis(parasulfonato-phenyl)porphyrin anion can form 1:1, 2:2, and 3:2 (metal ion/porphyrin) out-of-plane (OOP) complexes, from which Hg2P2(8-) has not been identified until now. Identification of this species significantly promoted the confirmation of the composition and the precise e…
Nano-antennae consisting of gold particle dimers were fabricated by electron-beam lithography. Dark-field scattering spectroscopy was used to probe the plasmonic response of individual nano-antennae and to characterize the localized surface plasmon resonances they support. Fluorescence from dye molecules dispersed in…