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Experimental investigation of the influence of the compounding process and the composite composition on the mechanical properties of a short flax fiber–reinforced polypropylene composite

Florian Puch、Christian Hopmann2014-07-05Polymer Composites

Polypropylene (PP) composites containing 20 wt% short flax fibers are prepared, and the process parameters such as throughput, rotational speed, and screw configuration are varied during melt compounding with a corotating intermeshing twin‐screw extruder. The investigations reveal that low rotational speeds, high thro…

Polymer crystallization and propertiesNatural Fiber Reinforced CompositesFiber-reinforced polymer composites

Mechanical behavior and fracture toughness of epoxy composites reinforced with combination of fibrous and spherical nanofillers

Zhongwei Zhang、Yefa Tan、Xiaolong Wang 等 5 位作者2014-07-05Polymer Composites

Epoxy nanocomposites modified with multiwalled carbon nanotubes (MWNTs), rubber nanoparticles (RNPs), and the combinations of MWNTs and RNPs were prepared. The effects of multiphase reinforcements on mechanical and fracture properties of epoxy resin were investigated. With combined use of RNPs and MWNTs, the ternary n…

Carbon Nanotubes in CompositesPolymer Nanocomposites and PropertiesEpoxy Resin Curing Processes

Direct conversion of syngas to DME over CuO-ZnO-Al2O3/HZSM-5 nanocatalyst synthesized via ultrasound-assisted co-precipitation method: New insights into the role of gas injection

Somaiyeh Allahyari、Mohammad Haghighi、Amanollah Ebadi 等 4 位作者2014-07-05International Journal of Energy Research

In this study, direct synthesis of dimethyl ether (DME) is conducted over a bifunctional CuO–ZnO–Al2O3/H Zeolite Socony Mobil-5 (HZSM-5) nanocatalyst. A hybrid method of ultrasound-assisted co-precipitation is used for the synthesis of catalysts, and the effect of gas injection during sonication is investigated. The p…

Catalytic Processes in Materials ScienceCatalysts for Methane ReformingCatalysis and Oxidation Reactions

Natural polyphenol tannic acid reinforced poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) composite films with enhanced tensile strength and fracture toughness

Hengxue Xiang、Lili Li、Shichao Wang 等 7 位作者2014-07-05Polymer Composites

Novel fully biodegradable composites were successfully prepared by solution casting. The mechanical properties, chemical structure and intermolecular interaction, the melting and crystallization behaviors, and crystalline morphologies of the Tannic acid (TA)/PHBV composites were investigated. Uniaxial tensile mechanic…

Natural Fiber Reinforced Compositesbiodegradable polymer synthesis and propertiesPolymer composites and self-healing

Adhesion molecules from the diatom Phaeodactylum tricornutum (Bacillariophyceae): genomic identification by amino‐acid profiling and in vivo analysis

Anusuya Willis、Maeve R Eason-Hubbard、Oliver M. Hodson 等 6 位作者2014-07-05Journal of Phycology

Cell adhesion molecules (CAMs) are important in prokaryotes and eukaryotes for cell-cell and cell-substratum interactions. The characteristics of adhesive proteins in the model diatom Phaeodactylum tricornutum were investigated by bioinformatic analysis and in vivo characterization. Bioinformatic analysis of the prote…

Protist diversity and phylogenyDiatoms and Algae ResearchMarine Biology and Environmental Chemistry

Graphene-Templated Growth of Pd Nanoclusters

Karin Gotterbarm、Christian Steiner、Carina Bronnbauer 等 7 位作者2014-07-05The Journal of Physical Chemistry C

Graphene grown on Rh(111) was used as a template for the growth of Pd nanoclusters. Using high-resolution synchrotron radiation-based X-ray photoelectron spectroscopy, we studied the deposition of Pd on corrugated graphene in situ. From the XP spectra, we deduce a cluster-by-cluster growth mode. The formation of clust…

Graphene research and applicationsnanoparticles nucleation surface interactionsSurface Chemistry and Catalysis

Capsaicin-capped silver nanoparticles: its kinetics, characterization and biocompatibility assay

Nagoth Joseph Amruthraj、J. Raj、Antoine Lebel2014-07-05Applied Nanoscience

Capsaicin was used as a bio-reductant for the reduction of silver nitrate to form silver nanoparticles. The formation of the silver nanoparticles was initially confirmed by color change and Tyndall effect of light scattering. It was characterized with UV–visible spectroscopy, FTIR and TEM. Hemagglutination (H) test an…

Nanoparticle-Based Drug DeliveryNanoparticles: synthesis and applicationsGold and Silver Nanoparticles Synthesis and Applications

Polyethylene/sepiolite fibers. Influence of drawing and nanofiller content on the crystal morphology and mechanical properties

Yanela N. Alonso、Raquel E. Martini、A. Iannoni 等 6 位作者2014-07-05Polymer Engineering and Science

The influence of sepiolite content (1, 2, and 3 wt%) and successive drawing steps on the final properties of polyethylene/sepiolite nanocomposite fibers are reported. Particularly the effects of these variables on crystallinity, fiber macroscopic morphology, and tensile mechanical properties are analyzed applying diff…

Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesNatural Fiber Reinforced Composites

Seedless growth of zinc oxide flower-shaped structures on multilayer graphene by electrochemical deposition

Nur Suhaili Abd Aziz、Tomoya Nishiyama、Nurul Izni Rusli 等 6 位作者2014-07-05Nanoscale Research Letters

A seedless growth of zinc oxide (ZnO) structures on multilayer (ML) graphene by electrochemical deposition without any pre-deposited ZnO seed layer or metal catalyst was studied. A high density of a mixture of vertically aligned/non-aligned ZnO rods and flower-shaped structures was obtained. ML graphene seems to gener…

Graphene research and applicationsZnO doping and propertiesGas Sensing Nanomaterials and Sensors

Microwave, Spark Plasma and Conventional Sintering to Obtain Controlled Thermal Expansion β‐Eucryptite Materials

Rut Benavente、M.D. Salvador、Olga García‐Moreno 等 6 位作者2014-07-05International Journal of Applied Ceramic Technology

Lithium aluminosilicate was fabricated by conventional and nonconventional sintering: microwave and spark plasma sintering, from 1200 to 1300°C. A considerable difference in densification, microstructure, coefficient of thermal expansion behavior and hardness and Young's modulus was observed. Microwave technology made…

Advanced ceramic materials synthesisIntermetallics and Advanced Alloy PropertiesAdvanced materials and composites

Preparation and characterization of bone marrow mesenchymal stem cell‐derived extracellular matrix scaffolds

Yan Xu、Guangyue Xu、Cheng Tang 等 9 位作者2014-07-05Journal of Biomedical Materials Research Part B Applied Biomaterials

The aim of this study was to assess the feasibility of creating extracellular matrix (ECM) scaffolds from mesenchymal stem cells. Bone marrow mesenchymal stem cell (BMSC)-derived ECM (BMSC-dECM) scaffolds were fabricated by lyophilization after crosslinking, without using a decellularization process. Acellular porcine…

Bone Tissue Engineering MaterialsElectrospun Nanofibers in Biomedical ApplicationsTissue Engineering and Regenerative Medicine

Preparation and characterization of low‐density polyethylene/thermoplastic starch composites reinforced by cellulose nanofibers

Marzieh Alidadi‐Shamsabadi、Tayebeh Behzad、Rouhollah Bagheri 等 4 位作者2014-07-05Polymer Composites

In the current study, the effect of extracted cellulose nanofibers (CNFs) on rheological and mechanical properties and biodegradability of polyethylene/starch blend was investigated. The CNFs were extracted from wheat straws using a chemo‐mechanical method. Polyethylene/starch blend was reinforced by different amounts…

Nanocomposite Films for Food PackagingNatural Fiber Reinforced CompositesAdvanced Cellulose Research Studies

Biological Targeting of Plasmonic Nanoparticles Improves Cellular Imaging via the Enhanced Scattering in the Aggregates Formed

Mena Aioub、Bin Kang、Megan Mackey 等 4 位作者2014-07-05The Journal of Physical Chemistry Letters

Gold nanoparticles (AuNPs) demonstrate great promise in biomedical applications due to their plasmonically enhanced imaging properties. When in close proximity, AuNPs plasmonic fields couple together, increasing their scattering cross-section due to the formation of hot spots, improving their imaging utility. In the p…

Nanoparticle-Based Drug DeliveryGold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniques

Potential use of natural silk for bio-dental applications

Muhammad Sohail Zafar、Khalid H. Al-Samadani2014-07-05Journal of Taibah University Medical Sciences

Silks are protein polymers that are spun into fibres by silkworms and spiders under ambient conditions. Silk has been used as a biomaterial in a variety of biological applications for many years, whereas there are few applications in dentistry. The aim of this study was to explore the potential properties of natural s…

Electrospun Nanofibers in Biomedical ApplicationsSilk-based biomaterials and applicationsSilkworms and Sericulture Research

Electrochemical properties of free-standing polypyrrole/graphene oxide/zinc oxide flexible supercapacitor

W. K. Chee、‬Hong Ngee Lim、Nay Ming Huang2014-07-05International Journal of Energy Research

We report the preparation of a polypyrrole/graphene oxide/zinc oxide nanocomposite on a nickel foam using a simple and rapid single-step electrochemical deposition process under ambient conditions. A free-standing flexible supercapacitor was fabricated by sandwiching a polyvinyl alcohol hydrogel polymer electrolyte be…

Supercapacitor Materials and FabricationAdvanced Sensor and Energy Harvesting MaterialsConducting polymers and applications

Effect of pH on the sonochemical synthesis of BiPO4 nanostructures and its electrochemical properties for pseudocapacitors

V.D. Nithya、B. Hanitha、Subramani Surendran 等 5 位作者2014-07-05Ultrasonics Sonochemistry

Using sonochemical method, BiPO4 nanocrystals were prepared at different pH conditions (pH-1, 3, 5, 7, 9 & 12) for the possible applications of pseudocapacitor electrodes. The prepared BiPO4 nanocrystals belong to monoclinic structure with P21 space group. The SEM image revealed that the particles changed from irregul…

Supercapacitor Materials and FabricationConducting polymers and applicationsElectrospun Nanofibers in Biomedical Applications

Silicon Growth at the Two-Dimensional Limit on Ag(111)

Andrew J. Mannix、Brian Kiraly、Brandon Fisher 等 5 位作者2014-07-05ACS Nano

Having fueled the microelectronics industry for over 50 years, silicon is arguably the most studied and influential semiconductor. With the recent emergence of two-dimensional (2D) materials (e.g., graphene, MoS2, phosphorene, etc.), it is natural to contemplate the behavior of Si in the 2D limit. Guided by atomic-sca…

Graphene research and applications2D Materials and ApplicationsTopological Materials and Phenomena

Direct observation of liquid crystals using cryo‐TEM: Specimen preparation and low‐dose imaging

Min Gao、Young‐Ki Kim、Cuiyu Zhang 等 16 位作者2014-07-05Microscopy Research and Technique

Liquid crystals (LCs) represent a challenging group of materials for direct transmission electron microscopy (TEM) studies due to the complications in specimen preparation and the severe radiation damage. In this paper, we summarize a series of specimen preparation methods, including thin film and cryo-sectioning appr…

Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsPlant Reproductive Biology

Thermal Conductivity of Graphene Laminate: Making Plastic Thermally Conductive

H. Malekpour、K. -H. Chang、J. -C. Chen 等 7 位作者2014-07-05arXiv

We have investigated thermal conductivity of graphene laminate films deposited on polyethylene terephthalate substrates. Two types of graphene laminate were studied - as deposited and compressed - in order to determine the physical parameters affecting the heat conduction the most. The measurements were performed usin…

Mesoscale and Nanoscale PhysicsMaterials Science

Damage nucleation from repeated dislocation absorption at a grain boundary

Zhiliang Pan、Timothy J. Rupert2014-07-05arXiv

Damage nucleation from repeated dislocation absorption at a grain boundary is simulated with molecular dynamics. At the grain boundary-dislocation intersection site, atomic shuffling events determine how the free volume brought by the incoming dislocation is accommodated. This process in turn determines the crack nucl…

Mesoscale and Nanoscale PhysicsMaterials Science