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Estimation of surface properties of grafted layers formed on low‐ and high‐density polyethylene plates by photografting of methacrylic acid and acrylic acid at different monomer concentrations and temperatures

Kazunori Yamada、Sho Yamagami、Yuki Naohara2012-01-29Journal of Applied Polymer Science

Abstract An investigation was carried out on estimation of hydrophilicity, wettability and water‐absorptivity, and surface analysis by X‐ray photoelectron spectroscopy of the low‐ and high‐density polyethylene (LDPE and HDPE) plates photografted with methacrylic acid (MAA) and acrylic acid (AA) at different monomer co…

Surface Modification and SuperhydrophobicityPolymer crystallization and propertiesMicroplastics and Plastic Pollution

Synthesis and properties of bio‐based thermoplastic polyurethane based on poly (L‐lactic acid) copolymer polydiol

Chao Zeng、Naiwen Zhang、Jie Ren2012-01-29Journal of Applied Polymer Science

Abstract The goal of this work is the synthesis of a new kind of bio‐based thermoplastic polyurethane (BTPU) based on poly( L ‐lactic acid) (PLA) and poly(tetramethylene) glycol (PTMEG) segments via chain‐extension reaction of dihydroxyl terminated (HO‐PLA‐PTMEG‐PLA‐OH) copolymer using hexamethylene diisocyanate (HDI)…

biodegradable polymer synthesis and propertiesPolymer composites and self-healingCarbon dioxide utilization in catalysis

Characterization and pseudopolymorphism of l-phenylalanine anhydrous and monohydrate forms

Jie Lü2012-01-29African Journal of Pharmacy and Pharmacology

In this work, the preformulation study on the solid state characterization for the anhydrous form and the monohydrate form of l-phenylalanine has been initially conducted by the use of powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermog…

Crystallography and molecular interactionsAnalytical Chemistry and ChromatographyCrystallization and Solubility Studies

Novel electromagnetic interference shielding effectiveness in the microwave band of magnetic nitrile butadiene rubber/magnetite nanocomposites

Ahmed A. Al‐Ghamdi、Omar A. Al‐Hartomy、Falleh Al‐Salamy 等 7 位作者2012-01-29Journal of Applied Polymer Science

Abstract A novel nitrile butadiene rubber (NBR)/magnetite (Fe 3 O 4 ) nanocomposite for electromagnetic interference (EMI) shielding at microwave frequency was successfully fabricated. The structural features of as‐synthesized magnetite and NBR/Fe 3 O 4 were examined by X‐ray diffraction, field emission scanning elect…

Electromagnetic wave absorption materialsDielectric materials and actuators

Preparation and Properties of Biodegradable Film Composites Using Modified Cellulose Fibre-Reinforced with PVA

Sandeep S. Laxmeshwar、D. J. Madhu Kumar、S. Viveka 等 4 位作者2012-01-29ISRN Polymer Science

Cellulose has a potential to become a key resource in the development of biodegradable film composites. In this work, cellulose was modified by using 2-(Trifluromethyl)benzoylchloride by base-catalyzed reaction. Modification of cellulose was confirmed by IR studies. The biodegradable composite films were developed by…

Nanocomposite Films for Food PackagingNatural Fiber Reinforced CompositesAdvanced Cellulose Research Studies

The effect of solvent dielectric properties on the collection of oriented electrospun fibers

Zaicheng Sun、Joseph M. Deitzel、Jeff Knopf 等 5 位作者2012-01-29Journal of Applied Polymer Science

Abstract A simple approach to electrospinning has been developed that enables the collection of polymer, ceramic, and multiphase composite fibers, in quantity, with a high degree of spatial orientation. It has been demonstrated that a careful choice of solvent effectively eliminates the onset of the characteristic “be…

Advanced Sensor and Energy Harvesting MaterialsElectrospun Nanofibers in Biomedical ApplicationsElectrohydrodynamics and Fluid Dynamics

Statistical Derivation of Basic Equations of Diffusional Kinetics in Alloys with Application to the Description of Diffusion of Carbon in Austenite

V. G. Vaks、I. A. Zhuravlev2012-01-29arXiv

Basic equations of diffusional kinetics in alloys are statistically derived using the master equation approach. To describe diffusional transformations in substitution alloys, we derive the "quasi-equilibrium" kinetic equation which generalizes its earlier versions by taking into account possible "interaction renormal…

Materials Sciencecond-mat.stat-mech

Numerical study of the thermoelectric power factor in ultra-thin Si nanowires

Neophytos Neophytou、Hans Kosina2012-01-29arXiv

Low dimensional structures have demonstrated improved thermoelectric (TE) performance because of a drastic reduction in their thermal conductivity, κl. This has been observed for a variety of materials, even for traditionally poor thermoelectrics such as silicon. Other than the reduction in κl, further improvements in…

Materials Science

Nanoparticles Functionalized with Ampicillin Destroy Multiple-Antibiotic-Resistant Isolates of Pseudomonas aeruginosa and Enterobacter aerogenes and Methicillin-Resistant Staphylococcus aureus

Ashley N. Brown、Kathryn Smith、Tova A. Samuels 等 6 位作者2012-01-29OpenAlex

We show here that silver nanoparticles (AgNP) were intrinsically antibacterial, whereas gold nanoparticles (AuNP) were antimicrobial only when ampicillin was bound to their surfaces. Both AuNP and AgNP functionalized with ampicillin were effective broad-spectrum bactericides against Gram-negative and Gram-positive bac…

Nanoparticles: synthesis and applicationsPharmaceutical and Antibiotic Environmental ImpactsBacterial biofilms and quorum sensing

Exploration of Boundary between Charge-Density-Wave and Mott–Hubbard States in Quasi-One-Dimensional Halogen-Bridged Metal Complexes

Shinya Takaishi2012-01-28Bulletin of the Chemical Society of Japan

Abstract In spite of a long history of quasi-one-dimensional halogen-bridged complexes (MX-chains), all Pt and Pd complexes form charge-density-wave (CDW) state (–X···M2+···X–M4+–X···), while all Ni complexes form Mott–Hubbard (MH) state (–X–Ni3+–X–Ni3+–X–), without exception. Although an interesting charge dynamics a…

Perovskite Materials and ApplicationsMagnetism in coordination complexesOrganic and Molecular Conductors Research

New polyelectrolytes based on 4‐vinyl‐1,2,3‐triazole and 1‐vinylimidazole

Elena N. Danilovtseva、Mikhail Chafeev、Vadim V. Annenkov2012-01-28Journal of Polymer Science Part A Polymer Chemistry

Abstract Copolymers of 4‐vinyl‐1,2,3‐triazole and 1‐vinylimidazole (VI) were obtained by radical copolymerization of (4‐vinyl‐1H‐1,2,3‐triazol‐1‐yl)methyl pivalate with VI followed by alkali hydrolysis. Reactivity ratios of the triazole and imidazole monomers are 0.51 and 0.30, respectively. Theoretical quantum‐chemic…

Click Chemistry and ApplicationsSynthesis and properties of polymersSynthesis and Biological Evaluation

Growth of a Pt film on non-reduced ceria: A density functional theory study

David Loffreda、Françoise Delbecq2012-01-28The Journal of Chemical Physics

The growth of platinum on non-reduced CeO(2) (111) surface is studied by means of calculations based on the density functional theory. Particles of increasing size are formed on the oxide surface by incorporating the platinum atoms one by one until multilayer films are obtained. The main conclusion is that platinum at…

Catalytic Processes in Materials ScienceCatalysis and Oxidation ReactionsCopper-based nanomaterials and applications

Microwave‐assisted synthesis and characterization of biodegradable block copolyesters based on poly(3‐hydroxyalkanoate)s and poly(D,L‐lactide)

Julien Ramier、Estelle Renard、Daniel Grande2012-01-28Journal of Polymer Science Part A Polymer Chemistry

Abstract Microwave (MW)‐assisted ring‐opening polymerization (ROP) provides a rapid and straightforward method for engineering a wide array of well‐defined poly(3‐hydroxyalkanoate)‐ b ‐poly( D,L ‐lactide) (PHA‐ b ‐PLA) diblock copolymers. On MW irradiation, the bulk ROP of D,L ‐lactide (LA) could be efficiently trigge…

biodegradable polymer synthesis and propertiesPolyoxometalates: Synthesis and ApplicationsCarbon dioxide utilization in catalysis

Surface properties and biocompatibility of cellulose acetates

Adina Maria Dobos、Iuliana Stoica、Niculae Olaru 等 6 位作者2012-01-28Journal of Applied Polymer Science

Abstract The article describes some properties of cellulose acetates (CAs) with different substitution degrees. The hydrophilic/hydrophobic properties, morphological aspects, and interface properties with red blood cells and platelets are affected by the substitution degree, synthesis conditions, history of the formed…

Surface Modification and SuperhydrophobicityElectrospun Nanofibers in Biomedical ApplicationsPolymer Surface Interaction Studies

Single-component Layered Molecular Conductor, [Au(ptdt)2]

Biao Zhou、Hiroyuki Yajima、Yuki Idobata 等 8 位作者2012-01-28Chemistry Letters

Abstract A single-component layered molecular conductor, [Au(ptdt)2] (ptdt: propylenedithiotetrathiafulvalenedithiolate) was prepared. Unlike the single-component molecular metal, [Au(tmdt)2] (tmdt: trimethylenetetrathiafulvalenedithiolate) exhibiting three-dimensional compact molecular packing and antiferromagnetic t…

Perovskite Materials and ApplicationsMagnetism in coordination complexesOrganic and Molecular Conductors Research

On a Novel Catalytic System Based on Electrospun Nanofibers and M-POSS

Erika Simona Cozza、Valentina Bruzzo、Fabio Carniato 等 5 位作者2012-01-28ACS Applied Materials & Interfaces

We report on a novel catalytic system based on electrospun polymer nanofibers, which were modified with a metal-containing polyhedral oligomeric silsesquioxanes (M-POSS). In particular, a titanium-based POSS, characterized by an amino group as reactive side, was contacted with poly(styrene-co-maleic anhydride) (PSMA)…

Metal and Thin Film MechanicsElectrospun Nanofibers in Biomedical ApplicationsSilicone and Siloxane Chemistry

Upgrading of Tannery Wastes under Fast and Slow Pyrolysis Conditions

A. Marcilla、Milagros León、A N Jesús García 等 5 位作者2012-01-28Industrial & Engineering Chemistry Research

The pyrolysis of a chromium-tanned waste (bovine split leather) under inert atmosphere has been carried out in a vertical lab scale reactor. The influence of process conditions, such as temperature, residence time, and heating rate on the pyrolytic product distribution has been studied, in order to optimize the liquid…

Dyeing and Modifying Textile FibersCollagen: Extraction and CharacterizationThermal and Kinetic Analysis

Effects of Surface Chemistry of Substrates on Raman Spectra in Graphene

Takahiro Tsukamoto、Kenji Yamazaki、Hiroki Komurasaki 等 4 位作者2012-01-28The Journal of Physical Chemistry C

We investigated the effects of surface chemistry of substrates on the Raman spectra of graphene flakes that come into contact with various insulating substrates, such as quartz and sapphire, under ambient conditions at room temperature. The G-peak positions of graphene flakes on such substrates were investigated, and…

Graphene research and applicationsNanopore and Nanochannel Transport StudiesGraphene and Nanomaterials Applications

Mechanical Property Characterization of Fiber-Reinforced Polymer Wood-Polypropylene Composite Panels Manufactured Using a Double Belt Pressing Technology

Sandeep Tamrakar、Stephen M. Shaler、Roberto Lopez‐Anido 等 7 位作者2012-01-28Journal of Materials in Civil Engineering

A novel manufacturing process for wood-polypropylene composite (WPC) panels reinforced with fiber-reinforced polymer (FRP) sheets was implemented using a double belt pressing technology. FRP sheets were placed on both sides of the WPC agglomerates during fabrication, which resulted in increased productivity and reduce…

Mechanical Behavior of CompositesNatural Fiber Reinforced CompositesAdditive Manufacturing and 3D Printing Technologies

Strategies of Targeting Tumors and Cancers

Rajesh K. Sain、Raje Chouhan、Laxmi P. Bagri 等 4 位作者2012-01-28Journal of cancer research updates

Targeted cancer therapies use drugs that specially reach at the affected site block the growth and spread of cancer. They interfere with specific molecules involved in carcinogenesis (the process by which normal cells become cancer cells) and tumor growth. By focusing on molecular and cellular changes that are specifi…

Nanoparticle-Based Drug DeliveryComputational Drug Discovery MethodsEnzyme function and inhibition