Natural fibre composites
A presentation about natural fibre composites
Materials Literature
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Tribological properties of epoxy/polyurea composite
Abstract The tribological behavior of epoxy/polyurea composite under dry friction was investigated. The worn surface morphologies of epoxy and epoxy/polyurea composite have been analyzed using scanning electron microscopy (SEM), and the functional group of epoxy and epoxy/polyurea composite before and after wear have…
Coulomb Explosion: A Novel Approach to Separate Single-Walled Carbon Nanotubes from Their Bundle
A novel approach based on Coulomb explosion has been developed to separate single-walled carbon nanotubes (SWNTs) from their bundle. With this technique, we can readily separate a bundle of SWNTs into smaller bundles with uniform diameter as well as some individual SWNTs. The separated SWNTs have a typical length of s…
Effect of Gd substitution on structural and magnetic properties of Zn–Cu–Cr ferrites prepared by novel rheological technique
A novel rheological technique was developed to synthesise Gd substituted Zn–Cu–Cr ferrites, Zn 0·6 Cu 0·4 Cr 0·5 Gd x Fe 1·5−x O 4 ( x=0·00, 0·02, 0·04, 0·06, 0·08) powders. The effects of the Gd substitution on the structural and magnetic properties of the as prepared Zn–Cu–Cr ferrites were investigated. The microstr…
Use of a Fiber-Optic Turbidity Probe to Monitor and Control Commercial-Scale Unseeded Batch Crystallizations
This article describes how a fiber-optic turbidity probe may be used as an inferential sensor to aid in the control of commercial-scale batch crystallizations. The discussion focuses on several unseeded crystallization examples involving cooling or cooling plus addition of antisolvent. In a typical control scheme, the…
Nanocrystalline Co 30 Fe 70 alloy synthesized by alkalide reduction
Co30Fe70 nanocrystallites have been synthesized by alkalide co-reduction of Co2+ and Fe3+. As produced, the material consists of highly pyrophoric 4.0 nm nanocrystals with a narrow (<12%) size distribution, that are superparamagnetic with an average blocking temperature <TB> of ∼20 K prior to removal of the by-product…
Photochemistry of Bis-Methacrylic Polymers and Alignment of Liquid Crystals
Photochemical processes leading to the photoinduced anisotropy and the excellent photoaligning properties of bis-methacrylic polymers are discussed. Comparing the data for bis-methacrylic polymers and a series of model compounds, we conclude that Fries rearrangements and crosslinking reactions taking place in bis-meth…
Ordered Structures in Carboxymethylcellulose−Cationic Surfactants−Copper Ions Precipitated Phases: in Situ Formation of Copper Nanoparticles
Small-angle X-ray scattering has been used to investigate the nanostructures in precipitated phases of carboxymethylcellulose/oppositely charged C(n)TAB surfactants mixtures in interaction with bivalent copper ions. In copper-free precipitates, a transition from a 2D hexagonal phase H(I) to a micellar cubic surfactant…
Delamination and Electromigration of Film Lines on Polymer Substrate Under Electrical Loading
As the main influencing factors for instability of film lines are widely used in microelectromechanical systems, buckle-driven delamination and electromigration of film lines on polymer substrate under electrical loading are reported in this letter. The critical buckling condition is obtained through Euler formula. In…
Oxidized Germanium as a Broad-Band Sensitizer for Er-Doped SnO2 Nanofibers
In the work described here, a vapor transport method and corresponding in situ oxidation−reduction reaction are used in order to introduce GeO x into Er-doped SnO 2 nanofibers for the deliberate purpose of producing a carrier-mediated excitation enhancement pathway into a conducting host. It is demonstrated that the p…
Combined Methane CO2 Reforming and Dehydroaromatization for Enhancing the Catalyst Stability
The combination of methane dry reforming (MDR) and methane dehydroaromatization (MDA) effectively improved the stability of the MDA catalyst. By using integrated Mo/Al 2 O 3 and Mo/MCM-49 catalysts at 1023 K, the conversion of methane only decreases slowly to 8.2% at 34 h, whereas it decreases rapidly to 3.5% even at…
Chemical Compatibility and Reaction-Induced Exfoliation in Photopolymerizable Clay Nanocomposites
Exfoliation of clay nanoparticles is a critical step in achieving unique properties associated with clay−polymer nanocomposites. However, a rational means of designing exfoliated nanocomposites, especially in photopolymerizable systems, remain elusive to date. This study investigates the influence of monomer−clay disp…
Some Properties of Composite Panels Made from Wood Flour and Recycled Polyethylene
This study investigated the effect of board type (unmodified vs. MAPE modified) on the surface quality and thickness swelling-water absorption properties of recycled high density polyethylene (HDPE) based wood plastic composites. Additionally, two commercially available coatings (cellulosic coating and polyurethane la…
Luminescence properties of Sm3+-doped P2O5–PbO–Nb2O5glass under high pressure
Samarium doped lead phosphate glass modified with niobium having a composition (in mol%) of 55P(2)O(5)+39.5PbO+5Nb(2)O(5)+0.5Sm(2)O(3) has been prepared by the conventional melt quenching technique. The emission spectra and the decay curves for the (4)G(5/2) level of Sm(3+) ions have been measured as a function of pre…
Electronic structure of the organic semiconductor Alq3 (aluminum tris-8-hydroxyquinoline) from soft x-ray spectroscopies and density functional theory calculations
The element-specific electronic structure of the organic semiconductor aluminum tris-8-hydroxyquinoline (Alq(3)) has been studied using a combination of resonant x-ray emission spectroscopy, x-ray photoelectron spectroscopy, x-ray absorption spectroscopy, and density functional theory (DFT) calculations. Resonant and…
Comparative study of paclitaxel physically encapsulated in and chemically conjugated with PEG‐PLA
Abstract Paclitaxel‐loaded poly(ethylene glycol)‐ b ‐poly( l ‐lactide (LA)) (PEG‐PLA) micelles were prepared by two methods. One is physical encapsulation of paclitaxel in micelles composed of a PEG‐PLA block copolymer and the other is based on a PEG‐PLA–paclitaxel conjugate, abbreviated as “conjugate micelles”. Their…
Fabrication of single crystalline gold nanobelts
Well dispersed, single crystalline gold nanobelts, with unique {110} crystallographic facets, were synthesized by a combined method consisting of directional solid-state transformation of an Fe–Au eutectoid and a selective phase dissolution without the presence of any surfactant. They have an average thickness of 25–3…
Synthesis of Colloidal ZnSe Nanospheres by Ultrasonic-Assisted Aerosol Spray Pyrolysis
Colloidal monodisperse ZnSe nanospheres consisting of primary nanocrystals were prepared by aerosol spray pyrolysis with ultrasonic nebulization. The formation mechanism of nanospheres seems to be generation of primary ZnSe nanocrystals and subsequent aggregation of primary nanocrystals in a tube reactor. Monodisperse…
Determination of concentration gradients in bone tissue generated by a biologically degradable magnesium implant
Rare earth element (REE) concentration gradients in bone were quantitatively investigated by LA-ICP-MS using different reference materials and ablation patterns. For line ablations a matrix effect was observed during calibration procedures. The maximum concentration of REE in bone around a biologically degradable magn…
Discontinuous Growth of Colloidal CdSe Nanocrystals in the Magic Structure
This study reveals that the growth rate of colloidal CdSe nanocrystals negatively deviates from the prediction of the classic growth theory from thermodynamics as CdSe nanocrystals attain the magic closed-shell structure at around 1.8 nm. We have suggested that the negative deviation is the consequence of the chemical…