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。
This book represents the first in a series entitled Polymeric Foams: Technology and Applications. Generally, thermoplastic and thermoset foams have been treated as two separate practices in industry. Polymeric Foams: Mechanisms and Materials provides the basics of foaming in general, providing a convenient and strong…
In this paper, we report a colloidal synthesis of high-quality, square, plate-shaped Gd2O3 nanocrystals. These nanoplates are single crystalline with a thickness of the Gd2O3 unit-cell edge length, approaching the lower limit of crystal growth.
In this paper, the phonon Boltzmann equation model is established to study the phonon thermal conductivity of nanocomposites with nanowires embedded in a host semiconductor material. Special attention has been paid to cell--cell interaction using periodic boundary conditions. The simulation shows that the temperature…
Adsorption of chicken egg lysozyme on silica nanoparticles of various diameters has been studied. Special attention has been paid to the effect of nanoparticle size on the structure and function of the adsorbed protein molecules. Both adsorption patterns and protein structure and function are strongly dependent on the…
Abstract Combining scale inhibition with matrix stimulation in a single treatment has always been a challenge due to potential formation damage. This concern has been historically prominent in carbonate reservoirs, due to the accelerated precipitation of the scale inhibitor at very low pH values. Earlier experience in…
Abstract The first coordination compounds of a hexapyrrin reveal an unexpected binding mode of longer open‐chain oligopyrroles to transition metal ions as observed by the X‐ray structural analysis of a Pd II derivative.
The surface-pressure-induced layering transition of a 2D nematic-like cyclolinear polyorganosiloxane that consists of six-membered rings of silicon and oxygen joined by oxygen bridges and that has phenyl side groups (CL-PMPhSi) is observed and characterized by film balance measurements, Brewster angle microscopy (BAM)…
Abstract Mesoporous hexagonally ordered SiO 2 (SBA‐15) with a pore diameter of 7 nm was used as a host matrix for nanoparticles of amorphous and crystalline germanium. Raman spectra were recorded for these germanium nanoparticles and for bulk amorphous and crystalline germanium powder. The band shifts and line shapes…
Abstract Na 26 Mn 39 O 55 wurde durch eine Redoxreaktion von metallischem Mangan mit CdO in Gegenwart von Na 2 O und Na 2 SO 4 als Mineralisator in Form roter Einkristalle mit oktaedrischem Habitus erhalten. Die Kristallstruktur konnte anhand von Einkristalldaten bestimmt werden (Fd3¯m, Z = 8, a = 2377, 4(3) pm bei 29…
Abstract Waterflood projects in oil fields cause important thermodynamic effects in the aqueous phase, resulting in precipitation of insoluble salts due to changes in physical parameters. Giant fields offshore Brazil are operated by waterflooding. For some of the fields, injection of seawater, rich in sulphates, is no…
Abstract Co-deposition of calcium carbonate and calcium sulfate scale was detected in the some of the wells in the White Tiger oilfield, but, up to now, not much attention has been paid to this problem. In fact, these salts (calcium carbonate and calcium sulfate) co-exist and co-precipitate in the system of seawater a…
Abstract Scale inhibitor core floods were performed using outcrop Jurassic Portlandian chalk cores. The effect of pH on the phosphonate-carbonate interaction was studied by performing core floods at various fixed injected pH values (pH ∼6, 4, and 2). The scale inhibitor (SI) used in these core floods was 5000 ppm acti…
Abstract PPCA and DETPMP are two common commercial scale inhibitors used to control mineral scaling in the oil and gas industry. Normally, PPCA is regarded as a nucleation inhibitor and DETPMP as a growth inhibitor. In this paper, the effect of PPCA and DETPMP blends on the inhibition efficiency of calcium carbonate s…
Abstract Scale control in subsea horizontal wells is recognised as a particular technical and economic challenge, especially if effective chemical placement cannot be achieved through conventional bullhead squeeze treatments. When long horizontal or highly deviated wells produce from areas of high permeability contras…
Abstract The risks and uncertainties associated with scale control in new field developments can often have a significant impact on the field economics. This can be especially true for marginal subsea fields producing from areas with high barium concentrations in their formation waters. Other aspects such as completio…
Studies of the dielectric properties and phase behavior of an ${}^{18}\mathrm{O}$-substituted ${\mathrm{SrTiO}}_{3}$ (>97% ${}^{18}\mathrm{O}),$ or STO-18, crystal at 1 bar and as functions of hydrostatic pressure and applied dc biasing electric field have shed much light on the mechanism of the ${}^{18}\mathrm{O}$…
A series of aliphatic copolyesters was obtained from (R,S)-beta-butyrolactone and two isomeric hydroxy acids, 6-hydroxyhexanoic and (R,S)-2-hydroxyhexanoic acids. The reactions were conducted in bulk without catalyst. Electrospray ionization tandem mass spectrometry (ESI-MSn) was used for molecular characterization of…
C n B and C n B 2 clusters, n = 4−10, were studied at the B3LYP/6-311G** level of theory. When n = 5, the linear and cyclic structures are comparable in energy. For n ≥ 6, the minimal-energy structures were found to be cyclic. Moreover, in contrast to all other reported heteroatom−carbon clusters, the lowest-energy li…
We investigate the photoluminescence (PL) evolution of porous silicon samples when exposed to air in darkness and under illumination. Oxygen incorporation is monitored through ir spectroscopy. Fourier transform infrared measurements show that samples exposed to air in darkness exhibit low oxidation rates whereas its P…
Abstract Large volumes of hydrate inhibitors (e.g., methanol, ethanol, monoethylene glycol, and triethylene glycol as cosolvent) are added to control hydrate formation. Such practice has an adverse effect on scale formation since the mineral salts are generally less soluble in the cosolvent. Due to production from res…