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Items from 1 to 20 out of 12,453 results

article

Swarm intelligence integrated approach for experimental investigation in milling of multiwall carbon nanotube/polymer nanocomposites

Kharwar, Prakhar Kumar, Verma, Rajesh Kumar, Mandal, Nirmal Kumar, Mondal, Arpan Kumar, more

Archive of Mechanical Engineering > 2020 > 67 > 3

article

Infrared Signature of Novel Super-Thermite (Fe₂O₃/Mg) Fluorocarbon Nanocomposite for Effective Countermeasures of Infrared Seekers

Sherif Elbasuney, Amir Elsaidy, Mohamed Kassem, Hesham Tantawy

Journal of Inorganic and Organometallic Polymers and Materials > 2018 > 28 > 5 > 1718-1727

Infrared (IR) guided missiles are real threat; they caused 90% of aircraft damage. Fluorocarbon polymer nanocomposite based on super-thermites can offer superior thermal signature to countermeasure IR guided missile seekers. This study reports on the sustainable fabrication of mono-dispersed colloidal Fe₂O₃ nanoparticles with 3 nm average particle size. Fe₂O₃ nanoparticles were dispersed in acetone...

article

Hybrid and hierarchical nanoreinforced polymer composites: Computational modelling of structure–properties relationships

Leon Mishnaevsky, Gaoming Dai, L. Mishnaevsky, G. Dai

Composite Structures > 2014 > 117 > Complete > 156-168

Hybrid and hierarchical polymer composites represent a promising group of materials for engineering applications. In this paper, computational studies of the strength and damage resistance of hybrid and hierarchical composites are reviewed. The reserves of the composite improvement are explored by using computational micromechanical models. It is shown that while glass/carbon fibers hybrid composites...

article

Integrative strategies to hybrid lamellar compounds: an integration challenge

F.M. Fernandes, H. Baradari, C. Sanchez, F.M. Fernandes, more

Applied Clay Science > 2014 > 100 > Complete > 2-21

During the past decades, the potential derived from the hybridization of inorganic materials, has been widely studied and presented. The capability of tuning materials' performances, not only in terms of tailoring their physico-chemical properties to answer prerequisites of a given application, but also regarding the elaboration of novel concepts, opened a door to a radical new world in materials...

article

Production of nanocrystalline lithium fluoride by planetary ball-milling

Clemens Wall, Alexander Pohl, Michael Knapp, Horst Hahn, more

Powder Technology > 2014 > 264 > Complete > 409-417

Lithium fluoride nanopowders have been prepared by high-energy milling using a planetary ball-mill. The influence of dispersion agents, milling time, ball-size and ball-to-powder ratio on the properties of the material has been investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and N ₂ -physisorption measurements (BET). It was observed that the agglomeration...

article

Electrosynthesis of Co/PPy nanocomposites for ORR electrocatalysis: a study based on quasi-in situ X-ray absorption, fluorescence and in situ Raman spectroscopy

Patrizia Bocchetta, Alessandra Gianoncelli, Majid Kazemian Abyaneh, Maya Kiskinova, more

Electrochimica Acta > 2014 > 137 > Complete > 535-545

Cobalt/polypyrrole ORR electrocatalysts has been electrochemically synthesized by a potentiostatic anodic/cathodic pulse-plating procedure. The deposition electrochemistry has been studied by cyclic voltammetry and in-situ Micro Raman Spectroscopy complemented with scanning X-ray microscopy and micro-spot X-ray absorption spectroscopy (μ-XAS). Linear sweep voltammetry (LSV) under oxygen reduction...

article

Facile synthesis and enhanced electrochemical performance of Li2FeSiO4/C/reduced graphene oxide nanocomposites

Xiaomei Wang, Caixia Qing, Qingtang Zhang, Weifeng Fan, more

Electrochimica Acta > 2014 > 134 > Complete > 371-376

Li ₂ FeSiO ₄ /amorphous carbon/reduced graphene oxide (LFS/C/rGO) was synthesized from nano-SiO ₂ , rGO, Li ₂ CO ₃ , FeC ₂ O ₄ ·2H ₂ O and ammonium citrate by a facile solid-state reaction method. Electrical conductivity tests and charge-discharge voltage profiles indicate LFS/C/rGO with 20wt.% rGO shows the highest electrical conductivity...

article

Selective binding and magnetic separation of histidine-tagged proteins using Ni2+-decorated Fe3O4/hydroxyapatite composite nanoparticles

Shasha Yao, Xiqing Yan, Yanbao Zhao, Binjie Li, more

Materials Letters > 2014 > 126 > Complete > 97-100

Fe ₃ O ₄ /hydroxyapatite (Fe ₃ O ₄ /HAP) nanoparticles (NPs) were synthesized by hydrothermal method. The obtained NPs have excellent magnetic responsibility and can immobilize metal ions. After chelating Ni ²⁺ ions, Fe ₃ O ₄ /HAP-Ni ²⁺ NPs can be used to enrich histidine-tagged (His-tagged) proteins directly from the mixture of lysed...

article

Micro-molding with ultrasonic vibration energy: New method to disperse nanoclays in polymer matrices

Marc Planellas, Matías Sacristán, Lorena Rey, Cristian Olmo, more

Ultrasonics - Sonochemistry > 2014 > 21 > 4 > 1557-1569

Ultrasound technology was proved as an efficient processing technique to obtain micro-molded specimens of polylactide (PLA) and polybutylene succinate (PBS), which were selected as examples of biodegradable polyesters widely employed in commodity and specialty applications. Operational parameters such as amplitude, molding force and processing time were successfully optimized to prepare samples with...

article

Synthesis of hybrid materials via photopolymerization of benzoin functionalized silica nanoparticles

M. Karahasanoğlu, A. Önen, İ.E. Serhatlı, M. Karahasanoglu, more

Progress in Organic Coatings > 2014 > 77 > 6 > 1079-1084

Photopolymerization of methyl methacrylate (MMA) was achieved on the surface of silica nanoparticles by ''Grafting from'' method. Well defined spherical silica nanoparticles prepared by Stober method was functionalized with isocyanate groups of toluene di-isocyanate in order to achieve both improved dispersion of nanoparticles in organic solvents and further attachment of benzoin photoinitiator moieties...

article

Synthesis of Ni/ITO nanocomposite with excellent electromagnetic absorption via in situ reducing reaction

Hong-jie Meng, Xiao-wei Zhao, Xin-xin Wang, Yong-shuai Jia, more

Materials Letters > 2014 > 124 > Complete > 165-168

•First, we developed an in situ powder-separating reductive process to chemically synthesize Ni/ITO nanocomposites.•Second, the uniform dispersion of Ni nanoparticles in as-fabricated Ni/ITO nanocomposite is beneficial to acquiring proper electromagnetic impedance match and facilitating extra interfacial polarization mechanism thereby leading to increased microwave absorption.•As a result, as-fabricated...

article

Nanocomposites of iridium oxide and conducting polymers as electroactive phases in biological media

J. Moral-Vico, S. Sánchez-Redondo, M.P. Lichtenstein, C. Suñol, more

Acta Biomaterialia > 2014 > 10 > 5 > 2177-2186

Much effort is currently devoted to implementing new materials in electrodes that will be used in the central nervous system, either for functional electrostimulation or for tests on nerve regeneration. Their main aim is to improve the charge capacity of the electrodes, while preventing damaging secondary reactions, such as peroxide formation, occurring while applying the electric field. Thus, hybrids...

article

Unusual mechanical properties of melt-blended poly(lactic acid) (PLA)/clay nanocomposites

Sun-Mou Lai, Sheng-Huang Wu, Gwo-Geng Lin, Trong-Ming Don, more

European Polymer Journal > 2014 > 52 > Complete > 193-206

The commercial organic-modified clay was incorporated into a nearly amorphous PLA matrix using a melt-blending process to form PLA/clay nanocomposites. The nanocomposite containing 1phr of clay conferred the highest exfoliation of clay among all investigated clay dosages. Especially, only this particular nanocomposite had a lower modulus and exhibited significant stress-whitening and necking behavior...

article

Solid particle erosion mechanisms of hard protective coatings

Etienne Bousser, Ludvik Martinu, Jolanta E. Klemberg-Sapieha, E. Bousser, more

Surface & Coatings Technology > 2013 > 235 > Complete > 383-393

In order to assess the material loss mechanisms of monolithic coatings subjected to solid particle erosion (SPE) using angular alumina particles with relatively low velocities (<100m/s), we studied the erosion behavior of several hard coatings deposited by pulsed DC magnetron sputtering. We first validated a new methodology for the measurement of volume loss and optimized the testing conditions...

article

Quantitative analysis of the polyurethane composites with non-organic nanofiller for use in implants of intervertebral disc

Waśniewski, Bartłomiej, Ryszkowska, Joanna, Skalski, Konstanty, Pawlikowski, Marek, more

Archive of Mechanical Engineering > 2012 > 59 > 2

article

Effect of organoclays on the properties of polyurethane/clay nanocomposite coatings

Hua Jin, Jeong Jae Wie, Sung Chul Kim

Journal of Applied Polymer Science > 117 > 4 > 2090 - 2100

Linear, one‐binding‐site or two‐binding‐site (N⁺) organifiers with two hydroxyl end groups were synthesized, and novel organoclays were prepared through a cation‐exchange reaction between pristine sodium montmorillonite and the synthesized organifiers. After sonication of the as‐prepared organoclay in N,N′‐dimethylformamide for 10 min, the average size of the clay decreased to about 1 μm. The X‐ray...

article

Experimental study and micromechanical modeling of MMT platelet-reinforced PP nanocomposites

Ludovic Cauvin, Naresh Bhatnagar, Mathias Brieu, Djimédo Kondo

Comptes rendus - Mecanique > 2007 > 335 > 11 > 702-707

Nanocomposites with platelets reinforcements are emerging materials with strong potential for future engineering applications. The present study is a first step to characterize and predict the elastic behavior of Montmorillonite (MMT) clay reinforced Polypropylene (PP) nanocomposites. The pellets of nanoclay composites were made by first uniformly mixing the MMT platelets in a twin-screw extruder...

article

Conséquences de l'agrégation et de la percolation de charges sur le comportement viscoélastique de nanocomposites

Patrice Mélé, Sandrine Marceau, David Brown, Nicole D. Albérola

Comptes rendus - Mecanique > 2005 > 333 > 2 > 155-161

La présente Note a pour objet de différencier les contributions respectives de l'agrégation et de la percolation de charges au comportement viscoélastique des composites. Une telle séparation a été assurée grâce au développement d'un modèle micromécanique, assorti du concept de percolation. Pour citer cet article : P. Mélé et al., C. R. Mecanique 333 (2005).

article

Surface modification of cellulose fibers: towards wood composites by biomimetics

Sheila E. Gradwell, Scott Renneckar, Alan R. Esker, Thomas Heinze, more

Comptes rendus - Biologies > 2004 > 327 > 9-10 > 945-953

A biomimetic approach was taken for studying the adsorption of a model copolymer (pullulan abietate, DS 0.027), representing the lignin–carbohydrate complex, to a model surface for cellulose fibers (Langmuir–Blodgett thin films of regenerated cellulose). Adsorption results were assayed using surface plasmon resonance spectroscopy (SPR) and atomic force microscopy (AFM). Rapid, spontaneous, and desorption-resistant...

article

Synthesis of iron oxide-based magnetic nanomaterials and composites

Jean-Pierre Jolivet, Élisabeth Tronc, Corinne Chanéac

Comptes rendus - Chimie > 2002 > 5 > 10 > 659-664

Various properties of spinel iron oxide nanoparticles are reviewed in relation to the control of the particle size and the control of their dispersion in a variety of matrices. The deep knowledge of the different synthesis parameters and the interfacial oxide-solution characteristics allow us to prepare a large variety of materials like calibrated nanoparticles and inorganic or hybrid nanocomposites.

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Search results

Swarm intelligence integrated approach for experimental investigation in milling of multiwall carbon nanotube/polymer nanocomposites

Infrared Signature of Novel Super-Thermite (Fe₂O₃/Mg) Fluorocarbon Nanocomposite for Effective Countermeasures of Infrared Seekers

Hybrid and hierarchical nanoreinforced polymer composites: Computational modelling of structure–properties relationships

Integrative strategies to hybrid lamellar compounds: an integration challenge

Production of nanocrystalline lithium fluoride by planetary ball-milling

Electrosynthesis of Co/PPy nanocomposites for ORR electrocatalysis: a study based on quasi-in situ X-ray absorption, fluorescence and in situ Raman spectroscopy

Facile synthesis and enhanced electrochemical performance of Li2FeSiO4/C/reduced graphene oxide nanocomposites

Selective binding and magnetic separation of histidine-tagged proteins using Ni2+-decorated Fe3O4/hydroxyapatite composite nanoparticles

Micro-molding with ultrasonic vibration energy: New method to disperse nanoclays in polymer matrices

Synthesis of hybrid materials via photopolymerization of benzoin functionalized silica nanoparticles

Synthesis of Ni/ITO nanocomposite with excellent electromagnetic absorption via in situ reducing reaction

Nanocomposites of iridium oxide and conducting polymers as electroactive phases in biological media

Unusual mechanical properties of melt-blended poly(lactic acid) (PLA)/clay nanocomposites

Solid particle erosion mechanisms of hard protective coatings

Quantitative analysis of the polyurethane composites with non-organic nanofiller for use in implants of intervertebral disc

Effect of organoclays on the properties of polyurethane/clay nanocomposite coatings

Experimental study and micromechanical modeling of MMT platelet-reinforced PP nanocomposites

Conséquences de l'agrégation et de la percolation de charges sur le comportement viscoélastique de nanocomposites

Surface modification of cellulose fibers: towards wood composites by biomimetics

Synthesis of iron oxide-based magnetic nanomaterials and composites

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