Materials Literature
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Hydroxypropyl chitosan (HPCS), a water-soluble chitosan derivate, was modified by introducing photoreactive azide groups (4-azidobenzoic acid, Az-) to the amino groups of HPCS, resulting in a photocrosslinkable Az-HPCS. Novel porous chitosan scaffolds thus were fabricated by ultraviolet (UV) light irradiation of Az-HP…
Abstract The use of an accelerator based on diisopropyl xanthogen polysulfide (DIXP) to formulate bromobutyl elastomer (BIIR‐DIXP) compositions for sealing medical devices was published in the Journal of Applied Polymer Science (Ohbi, D. S.; Pureval, T. S.; Shah, T.; Siores, E. 2007, 106, 526). In this publication, a…
Despite widespread zirconium use ranging from nuclear technology to antiperspirants, important aspects of its solvation chemistry, such as the nature of small zirconium(IV) hydroxy cluster ions in aqueous solution, are not known due to the complexity of the zirconium aqueous chemistry. Using a combination of Car-Parri…
Abstract The effect of additives on glass transition behavior in melt processed blends of polystyrene (PS) and polypropylene (PP) was studied. Blends of additive‐free polystyrene and additive‐free polypropylene revealed the known effect of the PS T g increase in blend compositions where PP surrounds PS. Glass transiti…
The crystal structure of (S)-1-methylheptyl-4′-{4-octyloxy-2-{11-[4-(5-hexylpyrimidin-2-yl)phenoxy]undecanoyloxy}benzoyloxy}biphenyl-4-carboxylate, which has a relatively wide temperature range of blue phase III on cooling, has been determined. The molecule was found to form a λ-shaped structure. We have prepared a ho…
Various poly(vinyl alcohol)/carboxymethyl-chitosan (PVA/CMCS) blend films were prepared by a mechanical blending method and characterized by SEM for their surface and cross-section morphologies. It indicated that blending high CMCS content in PVA plastic led to a rough surface and loose structure. Bovine serum albumin…
The low surface energy and the great immiscibility of poly (dimethylsiloxane) (PDMS) with liquid crystals (LCs) are used in the fabrication of holographic polymer dispersed liquid crystals (HPDLCs). By adding increasing amounts of PDMS, the extent of the phase separation between the polymer and the LC, the LC channel…
We developed acicular BaTiO 3 particles achieved by controlling the morphology of BaC 2 O 4 ·0.5H 2 O to acicular shape and its phase transition to BaTiO 3 by introducing Ti ions from the coprecipitated amorphous phase. Acicular BaTiO 3 particles have an aspect ratio as high as 18, and the particle size can be control…
Abstract The performance of zirconium alloys in BWR, PWR, and PHWR nuclear reactors is dependent on the microstructure. Accordingly, the characterization of the microstructure is an integral part of any study conducted to develop models for in-reactor performance. Although the as-fabricated microstructure (texture, gr…
Abstract BACKGROUND: In this study, poly[( N ‐vinylimidazole)‐ co ‐(maleic acid)] (poly(VIm/MA)) hydrogels were prepared by γ‐irradiation of ternary mixtures of N ‐vinylimidazole–maleic acid–water using a 60 Co γ‐source. Spectroscopic and thermal analyses of these hydrogels as a function of protonation showed that the…
$^{31}\mathrm{P}$ NMR spectroscopy is used to study the nature of the molecular dynamics in a P-doped molecular As sulfide glass in the region of glass transition. Isotropic tumbling of the constituent molecules in the glass is observed even at $\ensuremath{\sim}70\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ below glass tra…
Confined lateral alumina templates are fabricated with different pore sizes by changing the acid electrolyte and the anodization voltage. The control of the number of pore rows down to one dimension is also achieved, by controlling the thickness of the starting aluminum film as well as the anodization voltage. We obse…
Abstract BACKGROUND: Investigations of chemical modification of electrode surfaces and immobilization of nitrogenated bases and oligonucleotides are considered essential for the construction of DNA electrochemical nanodevices. Modification of gold electrode surfaces with poly(4‐aminophenol) was carried out in order to…
High contents of fillers such as kaolin or calcium carbonate limit the use of waste paper, especially in tissue paper production. In order to determine the effect of flotation reagents on the removal of fillers, adsorption, zeta potential, and particle size measurement,s as well as flotation experiments using model di…
This paper reported an efficient and rapid method to produce highly monodispersed CdSe quantum dots (QDs), in which the traditional trioctylphosphine oxide (TOPO) was replaced by paraffin liquid as solvent and oleic acid as the reacting media. The experimental conditions and the properties of QDs had been studied in d…
A theory of general solutions of three-dimensional (3D) problems is developed for the coupled equilibrium equations in 1D hexagonal quasicrystals (QCs), and two new general solutions, which are called generalized Lekhnitskii?Hu?Nowacki (LHN) and Elliott?Lodge (E?L) solutions, respectively, are presented based on three…
Ordered mesoporous films are synthesized from the vapor-phase condensation of tetraethyl orthosilicate within preformed amphiphilic template films consisting of a blend of poly(ethylene oxide)- b -poly(propylene oxide)- b -poly(ethylene oxide) (Pluronic F127) and poly(4-hydroxystyrene) (PHOSt). By modification of the…
We have investigated the energy transfer dynamics in mixed lanthanide open-framework silicates, known as Ln-AV-20 materials, with the stoichiometric formula Na 1.08 K 0.5 Ln 1.14 Si 3 O 8.5 ·1.78H 2 O (Ln = Gd 3+, Tb 3+, Eu 3+ ), using steady-state and time-resolved luminescence spectroscopy. Energy transfer between d…
The present work shows the behavior of non-treated and chemical pre-treated peach palm fibers, as reinforcement polymer composites. Chemical treatments with H 2 O 2, NaOH, and C 3 H 3 N and their effects on adhesion performance of the fiber with unsaturated polyester resin are carried out. SEM is used to determine a t…
Applications of carbon nanotubes (CNTs) like field emission displays, super-capacitors, and cell growth scaffolds can benefit from controllable embedding of the CNTs in a material such that the CNTs are anchored and protrude a desired length. We demonstrate a simple method for anchoring densely packed, vertically alig…