Materials Literature
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Nanotechnology enables the designers to alter the structure of the packaging materials on the molecular scale, to give the materials desired properties. Simple traditional "packing" is to be replaced with multi-functional intelligent packaging methods to improve the food quality thanks to the application of nanotechno…
We investigate the multilayered structures of poly(ethylene)oxide/montmorillonite nanocomposite films made from solution. The shear orientation of a polymer-clay network in solution combined with simultaneous solvent evaporation leads to supramolecular multilayer formation in the film. The resulting films have highly…
Nanocrystals in the size range 12-21 nm of a model binary ionic material in the wurtzite (B4) structure were constructed with morphologies which minimize the surface energy. These were then embedded in a pressurization medium, consisting of a binary Lennard-Jones-type fluid and progressively pressurized in "constant p…
This study aims to predict the strength and elongation properties of cotton/polyester blended rotor yarns, using blend ratios and yarn count as predictors. A simplex lattice design with two replications at each design point is constructed to determine the combinations of the fibres’ mixture ratios . Prepared cotton/po…
In this study, chitosan [(1 --> 4) linked 2-amino-2-deoxy-beta-D-glucopyranose] beads were prepared by interacting this polycation (> 90% deacetylated) with the tripolyphosphate (TPP) polyanion. The resulting chitosan-TPP beads (C) were modified either by coating with sodium alginate (CA) or by cross-linking with glut…
A simple method for fabricating patternable micro-mirror devices by photo-induced alignment of dye-doped cholesteric liquid crystal (CLC) is demonstrated. The CLC texture can be changed from random distribution to nearly perfect planar by the photo-excited adsorbed dyes. This structure transformation leads to a substa…
A new photochromic diarylethene with oligothiophene side arm substituents has been synthesized. This diarylethene undergoes excellent photoisomerization with UV/Vis light irradiation, and shows fluorescence emission and electrochemical behavior. Both the fluorescence emission and oxidation/reduction potential are reve…
A new homologous series of achiral five-ring bent-core mesogens is presented. The mesophase behaviour has been studied by polarizing microscopy, differential scanning calorimetry, X-ray diffraction and electro-optical measurements. The homologues with shorter terminal chains (C8, C12) form an SmCPA phase, homologues w…
This paper describes a three-dimensional time-dependent model of a direct current plasma torch when the arc operates in the restrike mode. The model is based on the simultaneous solution of the conservation equations of mass, momentum, energy, electric current and electromagnetic equations. It makes it possible to pre…
Synthesis of a novel bis(terpyridine) ligand, 4,4'-bis(2,2':6',2''-terpyridinyl)triphenylamine, utilizing triphenylamine, as a specific angle controller, has led to the self-assembly of a unique hexagonal metallomacrocycle family, [Fe6(2)6(PF6)12] and [Zn6(2)6(BF4)12], utilizing terpyridine-metal(II)-terpyridine conne…
Circularly polarized luminescence (CPL) from selected transitions of Eu(III) in resolved single crystals of Na3[Eu(ODA)3].2NaClO4.6H2O are compared to CPL results obtained from solutions containing perturbed racemic mixtures of Eu(2,6-pyridine-dicarboxylate)3 (3-) and enantiomerically pure d-f helicate LambdaLambda-(-…
Di-block co-polymers of poly(ethylene glycol)-poly(L-lactic acid) (PEG-PLLA) were prepared by ring-opening polymerization, and their self-association and micelle formation were investigated. The block co-polymers have the same block length of the hydrophilic PEG segment (Mn = 2000), but different chain lengths of the…
A novel beta-ketoimine, 4-N-(n-butylamino)-3-penten-2-one (1), and beta-enaminoester, Ethyl 3-N-(isopropylamino)-2-butenoate (2), were synthesized by the reaction of the 2,4-pentanedione or ethyl 3-oxo butanoate with the n-butyl and isopropyl amine, respectively. The isolated free ligands 1 and 2 were reacted with die…
The development and commercialization of nanoparticles such as nanoclays (NCs), carbon nanotubes (CNTs) and polyhedral oligomeric silsesquioxanes (POSS) offers new possibilities to tailor adhesives at the nanoscale. Four types of POSS, with reactive mono-functional groups of isocyanatopropyl, glycidoxypropyl, aminoeth…
Photochromic diarylethenes having furan units (1 and 3) were synthesized and their photochromic performances were compared with those having thiophene units. The cyclization quantum yields of both derivatives in hexane are similar. In contrast, the cycloreversion quantum yield of the derivative having furan units (1)…
Abstract The influence of polyelectrolytes with different architecture on spontaneous batch crystallization of calcium oxalate was investigated. A series of acidic acrylate block copolymers were been made, by radical polymerization, with defined molecular weight and structure. Radical polymerization of acrylic acid (A…
The atropisomeric compound (R)-2,2′,6,6′-tetramethyl-3,3′-dinitro-4,4′-bis[(4-nonyloxybenzoyl)oxy]biphenyl ((R)-1) was doped in the achiral liquid crystal hosts 2-(4-butoxyphenyl)-5-octyloxypyrimidine (2-PhP) and 4-(4′-heptyl[1,1′-biphen]-4-yl)-1-hexylcyclohexanecarbonitrile (NCB76), and electroclinic coefficients ec…
Here we show a novel chemical vapor synthesis technique, which uses high-pressure hydrogen and produces needle-shaped single crystalline made of metal hydride of MgH2. The principle of this method is based on the gas phase reaction of vaporized metal with high pressure hydrogen sublimating into solid metal hydride (Mg…
オーステナイト系ステンレス鋼の水素脆化感受性を高圧水素ガス環境および陰極チャージ下での低ひずみ速度引張試験 (SSRT, Slow Strain Rate Testing) により調査し, その試験結果をSSRTと同環境において鋼材中に吸蔵される表面水素濃度で整理した. 水素脆化感受性は高圧水素ガス環境および陰極チャージに関わらず, 表面水素濃度で整理できた. 限界表面水素濃度は304L鋼では10ppm以下, 316L鋼では約100ppmであった. 316Lの限界値は45MPaの高圧水素ガス環境で鋼材中に吸蔵される水素濃度よりも高く, この結果は高圧水素ガス環境において316Lが十分な耐水素脆性を有することを示すと考えられた.
Silicon carbide-based microporous ceramic membranes for hydrogen separation were prepared via pyrolysis of polycarbosilane as a polymeric precursor. To prepare membranes with excellent hydrogen separation performance, effects of hydrosililation cross linking, addition of thermally-labile polymer as well as pyrolysis c…