Materials Literature
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The crystallization rate of isotactic polypropylene (iPP) is often enhanced with sorbitol-based nucleating agents like 1,3:2,4-bis(3,4-dimethylbenzylidene)sorbitol or DMDBS. In the concentration range from the eutectic point (∼0.1 wt %) to 1 wt %, DMDBS crystallizes before the polymer, building a network of nanofibril…
Growth of zinc oxide nanorods with controlled defect densities was achieved in a low-temperature electrochemical process. The concentration of the defects was found to play an important role in the exciton emission in the ZnO nanorods, leading to shifts in the peak position and changes in the spectral shape of the ban…
Charge-transfer salts of protonated cations of 2,2′-disubstituted-4,4′-biimidazoles and oligo(imidazole)s with tetracyanoquinodimethane (TCNQ) were investigated to demonstrate the high potential of these systems for the regulation of molecular arrangement and electronic structure of charge-transfer salts. 4,4′-Biimida…
Pills are formed by entangling fibres into discrete balls on the surface of fabrics which are usually the result of wear, abrasion, washing or a combination of all three. In the present study, the effect of initial modulus of fibres on the pilling of woven fabrics was investigated. For this purpose, non-shrinkable (re…
Thermal resistance of woven fabrics can be calculated using a lumped model wherein the yarns, interlacements and air pores in a fabric can be treated as a system of resistances. Convective heat transfer can be simulated with the help of computational fluid dynamics (CFD). This paper presents an exhaustive exercise to…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTDirect Growth of Hyperbranched Polymers on Both Ends of a Linear PolymerWen-Ming Wan and Cai-Yuan Pan*View Author Information Department of Polymer Science and Engineering, Joint Laboratory of Polymer Thin Films and Solution, Univer…
The syntheses, structures, and magnetic properties of two new single-stranded hexadecanuclear manganese wheels [Mn16(CH3COO)8(CH3CH2CH2COO)8(teaH)12] x 10 MeCN (1 x 10 MeCN) and [Mn16((CH3)2CHCOO)16(teaH)12] x 4 CHCl3 (2 x 4 CHCl3), where teaH(2-) is the dianion of triethanolamine, are reported. 1 crystallizes in the…
New stable and adherent coating materials have been synthesized on the basis of inorganic/organic hybrid polymers. As the inorganic part, different poly(silsesquioxanes) (PSSQ) have been functionalized to act as polymeric chain transfer agents (CTAs) for a reversible addition fragmentation chain transfer polymerizatio…
Motivated by recent successful synthesize of segmented graphene nanoribbons (GNRs) with junctions, we explore electronic properties of a novel form of GNR with sawtooth-like structure using the density-functional theory method. It is found that the unique edge structures of the sawtooth-like GNR induce richer band-gap…
The wear comfort desired by the consumer is leading to increased use of fabrics containing elastane filaments. However, the elastane's ratio is an important factor influencing the fabric's mechanical properties. Thus, we study the effect of elastane's ratio and finishing process on the elasticity of denim whose weft y…
Nickel is widely used as an industrial catalyst and has recently been investigated as an oxygen carrier in chemical looping combustion (CLC), which is a novel approach for power generation that offers inherent CO 2 capture. However, prior studies have reported a wide range of activation energy values for nickel format…
The electrochemical opening of closed-ended, pristine single-walled carbon nanotubes (SWCNTs) upon the application of either a sufficiently oxidizing or reducing electrode potential is reported. Hitherto, it has been unclear whether the side walls of SWCNTs are electrochemically active, or whether, like their multiwal…
We describe a simple method to control the generation and the dimensions of focal conic domains in smectic liquid-crystal films. The surface of silicon substrates is structured in a way that areas with homeotropic anchoring conditions alternate with areas possessing random planar anchoring conditions. In smectic films…
Two chiral poly(3-alkylthiothiophene)s (P3ATTs) were prepared by polymerization of 2-bromo-4-(( S )-3,7-dimethyloctylthio)thiophene using a “modified McCullough method” ( P1 ) and 2,5-dibromo-3-(( S )-3,7-dimethyloctylthio)thiophene by the GRIM method ( P2 ). P1 was regioregular, while P2 was regio-irregular, as confi…
Aggregation behavior of colloidal silver nanoparticles for surface-enhanced Raman scattering (SERS) on a hydrophobic surface is investigated. A regular glass slide is used to deposit dicholoromethylsilane in order to inactivate the free hydroxyl groups and increase the hydrophobicity of the glass surface. A submicron…
A facile, one-step, template-free method is reported to tune β- d -glucose-stabilized Au nanoparticles (NPs) into 3-D network nanowires (NWs) and thus mesoporous gold sponge on a large scale by precise control of the solution pH in aqueous medium at room temperature. The Au NPs appear to undergo sequentially linear ag…
Three kinds of one-dimensional (1D) MgO nanostructures: nanowires, nanobelts, and nanotubes were synthesized through introducing the low-melting point mental Sn as catalyst in the chemical vapor deposition route. The morphology and crystalline structure were characterized by X-ray diffraction, field emission scanning…
Polylactide (PLA) is used for manufacturing lunch boxes and for packaging fresh food in Japan. PLA can be hydrolysed relatively easily to produce lactic acid, lactide and oligomers. Different types of PLA sheet were subjected to migration tests under various conditions and the lactic acid, lactide and oligomers conten…
We designed and tested an antioxidant nanoreactor based on encapsulation of Cu,Zn superoxide dismutase in amphiphilic copolymer nanovesicles, the membranes of which are oxygen permeable. The nanovesicles, made of poly(2-methyloxazoline)-poly(dimethylsiloxane)-poly(2-methyloxazoline), successfully encapsulated the prot…
The self-assembly of a modified fragment of the amyloid beta peptide, based on sequence Abeta(16-20), KLVFF, extended to give AAKLVFF is studied in methanol. Self-assembly into peptide nanotubes is observed, as confirmed by electron microscopy and small-angle X-ray scattering. The secondary structure of the peptide is…