Materials Literature
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Abstract Cellulose fiber surface was modified with silk sericin (or simply, sericin). Sericin fixation on cellulose was confirmed by environmental scanning electron microscopy (ESEM) and Fourier transform infrared spectrophotometry–attenuated total reflectance (FTIR‐ATR). Sericin content in finished samples was estima…
The magnetic and structural properties of two Ru2(DArF)4Cl compounds, where DArF is the anion of a diaryl formamidine, are presented here. The compounds with Ar = p-anisyl and m-anisyl both show temperature dependence of chiT (chi = molar magnetic susceptibility), but for different reasons. For the para compound, ther…
Aggregates of nanosized perovskites and spinels (particle sizes below 15 nm) have been prepared by means of a low-cost silica xerogel template route. High values of surface area for the perovskites and spinels are obtained.
The SEC-MALS-QELS (size-exclusion chromatography equipped with multiangle light scattering and quasi-elastic light scattering detectors) method using lithium chloride/N,N-dimethylacetamide (LiCl/DMAc) and LiCl/1,3-dimethyl-2-imidazolidinone (LiCl/DMI) as mobile phases was applied to cellulose and cellulose tricarbanil…
Aqueous dispersions of mixed egg yolk phosphatidylcholine (PC) and poly(ethylene glycol) (PEG) modified distearoyl phosphatidylethanolamine (DSPE) were investigated with the purpose of determining shape, size, and conformation of the formed mixed micelles. The samples were prepared at a range of DSPEPEG to PC molar ra…
Abstract We studied the effect of nanofiber uniformity on electrospinning due to the charging of added ionic salts, as compared to the droplet current nonadded ionic salts and the charge‐to‐mass ratio of a highly conducting liquid. Various ionic salt concentrations were investigated. For an ionic salt concentration of…
Smectites, clay minerals commonly found in soils and sediments, vary widely in their ability to adsorb organic chemicals. Recent research has demonstrated the importance of surface charge density and properties of exchangeable cations in controlling the affinity of smectites for organic molecules. In this study, we in…
Abstract The effects of various additional non‐nitrile‐containing monomers on the heat resistance of thermoplastic expandable microspheres containing acrylonitrile and methacrylonitrile were investigated to determine the correlation between the chemical structure and expandable properties. Thermoplastic expandable mic…
Modern piezoelectric transducers normally have complicated structures and work under severe loading conditions. Due to their inherent domain‐switching processes, the real response of piezoceramics under large‐signal loading is dominated by a significantly non‐linear behavior that is to be considered in reliability ass…
In this study, we synthesized a series of the organic/inorganic hybrid star PCLs. These star PCLs can form inclusion complexes (ICs) with α- and γ-CD, but not with β-CD. These CD ICs were characterized by XRD, solid-state 13 C CP/MAS NMR spectroscopy, 1 H NMR spectroscopy, FT-IR spectroscopy, DSC, and TGA. Our results…
A novel approach to tailor the degree of branching of poly(ether ester)s was developed based on the copolymerization of oligomeric A 2 and B 3 monomers. A dilute solution of poly(ethylene glycol) (PEG) (A 2 ) was added slowly to a dilute solution of 1,3,5-benzenetricarbonyl trichloride (B 3 ) at room temperature in th…
The effect of geometrical frustration in a two-dimensional $1∕4$-filled strongly correlated electron system is studied theoretically, motivated by layered organic molecular crystals. An extended Hubbard model on the square lattice is considered, with competing nearest-neighbor Coulomb interaction $V$, and that of next…
The effect of adding various kinds of acids HX (X = Cl, Br, I, CF(3)COO, CF(3)SO(3), TFPB ((3,5-(CF(3))(2)C(6)H(3))(4)B) to isomeric tetra(2-pyridyl)porphyrin, tetra(3-pyridyl)porphyrin, and tetra(4-pyridyl)porphyrin (TpyP(2), TpyP(3), and TpyP(4)) in dichloromethane solution has been investigated through the combined…
Something to fret about: Luminescent semiconductor nanocrystals are covered with polymeric ligands which form many bonds to the nanocrystal (NC) and increase their solubility. The ligands are decorated with an organic dye molecule (see picture) so that the electronic interaction in individual nanocrystal–dye complexes…
Abstract Cyclodextrins are cyclic oligosaccharides. Cyclodextrin molecules can form inclusion complexes with a large number of organic molecules. The properties of cyclodextrins enable them to be used in a variety of different textile applications. Cyclodextrins can act as auxiliaries in washing and dyeing processes,…
We report the preparation of nanosized silicon nitride (Si 3 N 4 ) ceramics via high‐energy mechanical milling and subsequent spark plasma sintering. A starting powder mixture consisting of ultrafine β‐Si 3 N 4 and sintering additives of 5‐mol% Y 2 O 3 and 2‐mol% Al 2 O 3 was prepared by high‐energy mechanical milling…
The changes in the morphology of Ba-oxide-based NO x storage/reduction catalysts were investigated using time-resolved X-ray diffraction, transmission electron microscopy, and energy dispersed spectroscopy. Large Ba(NO 3 ) 2 crystallites form on the alumina support when the catalyst is prepared by the incipient wetnes…
1st and 2nd heterogeneous deacetylations of alpha- and beta-chitins in a multistep process by means of freeze-pump out-thaw (FPT) cycles in the presence of 50% (w/v) NaOH, for temperatures ranging from 80 to 110 degrees C, were compared to the classical method using argon as the medium atmosphere. It was clearly demon…
Metal Al particle surfaces were modified by fine γ‐Al 2 O 3 grains using a mixture of Al and Al(OH) 3 powders, which was pressureless sintered at a temperature of 600°C in vacuum. All the constituents on original Al particle surfaces were transformed into γ‐Al 2 O 3 phase after sintering. No dense passive oxide layers…
We report the synthesis of hyperbranched glycopolymers by self-condensing vinyl copolymerization (SCVCP) of the methacrylic AB* inimer 2-(2-bromoisobutyryloxy)ethyl methacrylate (BIEM) with 3- O -methacryloyl-1,2:5,6-di- O -isopropylidene-α- d -glucofuranose (MAIGlc) via atom transfer radical polymerization, followed…