Materials Literature
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In this communication, we report on a solvent free chemical oxidative polymerization route for the monomers based on 3,4-propylenedioxythiophenes wherein the process is applicable to both solid as well as liquid monomers and results in the bulk synthesis of ultra high molecular weight polymers.
The bipolar electrochemistry in a U-type cell equipped with a shielding wall was investigated in detail using a number of electrochemical measurements for the bipolar electrode (BPE). Measurement of the IR-drop in a U-type cell and the potential on the BPE afforded similar sigmoidal potential distribution profiles at…
The reactivity of lithiated graphite and deintercalated LiNi 1/3 Mn 1/3 Co 1/3 O 2 (called NMC) in electrolytes containing triphenyl phosphate (TPP) was studied by Accelerating Rate Calorimetry (ARC). Lithiated graphite shows similar reactivity in electrolytes containing TPP to those without TPP. By contrast, deinterc…
Tan δ measurements can be used to assess the condition of OF insulation in HV power cables. Data showing the behavior of tan δ as a function of temperature at constant electrical stress, and as a function of electrical stress at constant temperature, at different stages of degradation (or aging) are essential. By comb…
Poly-methacrylic acid grafted chitosan-bentonite nanocomposite (MACB) was synthesized by γ-irradiation polymerization. The nanocomposite was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) crystallography, thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM…
Abstract. Research on soil diatoms has been conducted in Podkarpacie voivodeship in Dą-browa village ( 50°03’31″N 21°48’35″E) in the Subcarpathian Province in SE Poland. On the same soil type, i.e. silty clay loam (sand 0–23%, silt>40, clay 36–50%), two tillage systems were applied under maize (Zea mays): tradi…
Abstract: Historically, there have been a half-dozen hydrogen induced degradation models proposed. A few of these have since been rejected but the remaining ones can be categorized into two. For the first general category, hydrogen enhanced decohesion (HEDE) has been promoted as hydrogen lowering the forces required f…
Anoxic ecosystems offer extreme environmental conditions and under these conditions wood can be preserved for thousands of years. The recalcitrant nature of wood is not only controlled by the anoxic environment but also by the structure and organisation of the cell wall components. The decay mechanisms acting in anoxi…
aqueous or lipid phases of liposomes with various sizes, compositions and other characteristics by different preparation techniques. An ideal method of liposome formulation is preparing liposome with high entrapment efficiency, narrow particle size distribution and long term stability. Numbers of techniques have been…
Graphene oxide (GO) reinforced polyimide nanocomposites were synthesized by in situ polymerization of monomers in the presence of GO sheets dispersed in N,N-Dimethylacetamide (DMAc). The functional groups (e.g., hydroxyl, epoxide, and carboxyl groups) associated with the GO make GO excellent dispersion in the organic…
CO 2 corrosion of mild steel in the oil and gas industry has been widely investigated.Nevertheless, research on high temperature CO 2 corrosion has been rarely conducted, and its mechanisms remain unclear.Therefore, it is important to complete an in-depth study of CO 2 corrosion of mild steel at high temperature.The e…
Layered materials can become a myriad source of two-dimensional crystals if the layers can be separated from each other, for example via exfoliation. Potential applications for single layer materials range from energy storage, electronics and mechanical reinforcement of plastics, to life-saving applications such as dr…
The photochemistry of the hydrogen-bonded oxotitanium porphyrin-water complex (TiOP-H(2)O) has been explored with electronic-structure calculations. It is shown that intramolecular charge-transfer processes, which are initiated by the excitation of the Soret band of TiOP, accumulate electronic charge on the oxygen ato…
Mesoporous, crack-free and crystalline CdTiO3 thin films were deposited by aerosol assisted chemical vapour deposition (AACVD) from a single source hetero-bimetallic precursor, [Cd4Ti4(dmae)4(TFA)8(OAc)4O6] 1 [where dmae = N,N-dimethyaminoethanolate, TFA = trifluoroacetate, Oac = acetate]. The precursor 1, prepared by…
Nanoscale Li and intermetallic Al-Mg metal hydride clusters are investigated as a possible hydrogen storage material using the high-level quantum Monte Carlo computational method. Lower level methods such as density functional theory are qualitatively, not quantitatively accurate for the calculation of the enthalpy of…
Morphologies featured in bicomponent 2D ultrathin films were reproduced on 3D non-woven microfibre structures. Fibre networks were constructed by electrospinning hydrophobised cellulose derivatives, trimethylsilyl cellulose (TMSC) and cellulose triacetate (CTA), dissolved in a common solvent. Diverse morphologies were…
The heteropolyvanadate cluster [(n-C(4)H(9))(4)N](4)[Mn(IV)V(12)O(34)]·2CH(3)CN has been isolated by cation exchange from K(10)[(Mn(IV)V(11)O(32))(2)]·20H(2)O. The structural transformation has been confirmed by X-ray single crystal structure determination and cryospray ionization mass spectrometry measurements.
Inorganic/polymer composite films with adjustable small thermal expansion were prepared by incorporating sub-μm sized particles of zirconium tungstate (ZrW2O8) into aromatic polyimide (PI). ZrW2O8 particles exhibit negative coefficients of thermal expansion (CTE) between ?4.8 to ?8.7 ppm/K. The cross-sectional SEM ima…
Nanomaterials can be synthesized by chemical, physical and the more recent biological routes. Biological routes have many advantages as these are eco-friendly, cheap, non-toxic, do not flocculate, and are well dispersed in water. Gold nanoparticles have shown significant promise as drug carriers, and have been used in…
Graphene, which is in the form of chemically reduced graphene oxide (r-GO), has been homogeneously dispersed in organic media without the addition of complicated dispersing agents or the need for functionalization of the starting graphene oxides. The aqueous colloids of r-GO sheets are synthesized in an alkaline solut…