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Neppalli R.,University of Padua | Neppalli R.,Stellenbosch University | Wanjale S.,CSIR - National Chemical Laboratory | Wanjale S.,Aditya Birla Science and Technology Center | And 3 more authors.
European Polymer Journal | Year: 2013

Electrospun poly(vinylidene fluoride) (PVDF) fibers, containing different amounts of montmorillonite clay were produced, in order to study the effect of clay and of the electrospinning process on the polymorphism, structure and morphology of the PVDF matrix. Clay acted as a processing aid agent, avoiding the formation of beads and improving the quality of the fibers. Clay and the electrospinning process acted synergically on the chain mobility, favoring the formation of β phase of PVDF, the most valuable for its piezoelectric properties, and shaping its semicrystalline morphology. Electrospinning did not significantly aid the dispersion of clay within the matrix. The interplay of formulation and processing in these composites allowed to obtain PVDF-based materials with varying polymorphism, structure and morphology, offering the possibility to ultimately control their functional properties.© 2012 Elsevier Ltd. All rights reserved. Source


Patidar D.,IIT | Tiwari S.,IIT | Sharma P.,Indian Institute of Technology Kanpur | Pardeshi R.,Aditya Birla Science and Technology Center | And 2 more authors.
JOM | Year: 2015

Metals processing operations, primarily soaking, heat treatment, and melting of metals are energy-intensive processes using fossil fuels, either directly or indirectly as electricity, to operate furnaces at high temperatures. Use of concentrated solar energy as a source of heat could be a viable “green” option for industrial heat treatment furnaces. This paper introduces the concept of a solar convective furnace which utilizes hot air generated by an open volumetric air receiver (OVAR)-based solar tower technology. The potential for heating air above 1000°C exists. Air temperatures of 700°C have already been achieved in a 1.5-MWe volumetric air receiver demonstration plant. Efforts to retrofit an industrial aluminium soaking furnace for integration with a solar tower system are briefly described. The design and performance of an OVAR has been discussed. A strategy for designing a 1/15th-scale model of an industrial aluminium soaking furnace has been presented. Preliminary flow and thermal simulation results suggest the presence of recirculating flow in existing furnaces that could possibly result in non-uniform heating of the slabs. The multifarious uses of concentrated solar energy, for example in smelting, metals processing, and even fuel production, should enable it to overcome its cost disadvantage with respect to solar photovoltaics. © 2015 The Minerals, Metals & Materials Society Source


Inamdar S.M.,CSIR - National Chemical Laboratory | Inamdar S.M.,Aditya Birla Science and Technology Center | More V.K.,Aditya Birla Science and Technology Center | Mandal S.K.,Asian Paints R and nter
Chemistry Letters | Year: 2012

We describe a green and efficient procedure for the hydroacylation of aldehydes with diisopropyl azodicarboxylate, using CuO nanoparticles supported on silica (CuO-np/SiO 2) as a catalyst, in good to excellent yields. A wide range of aldehydes, including aromatic and aliphatic compounds, were considered. The catalyst is found to be truly heterogeneous in the reaction mixture and can be reused without loss of catalytic activity. © 2012 The Chemical Society of Japan. Source


Inamdar S.M.,Aditya Birla Science and Technology Center | More V.K.,Aditya Birla Science and Technology Center | Mandal S.K.,Asian Paints R and nter
Tetrahedron Letters | Year: 2013

An efficient cross coupling amination of arene with azodicarboxylate to afford hydrazides catalysed by ruthenium chloride has been demonstrated. The catalyst was found to be effective across a spectrum of arenes with a variety of functional groups. The yields are found to be modest to low depending on the type of substrates. The catalyst can be recycled in ligand free conditions to afford the cross coupling reaction. © 2012 Published by Elsevier Ltd. Source


Inamdar S.M.,Aditya Birla Science and Technology Center | More V.K.,Aditya Birla Science and Technology Center | Mandal S.K.,Asian Paints R and nter
Tetrahedron Letters | Year: 2013

A facile synthetic route for benzimidazoles, benzothiazoles and benzoxazoles comprising the reaction of corresponding o-phenylenediamine, o-aminothiophenol and o-aminophenol with various aldehydes using silica supported nano-copper (II) oxide as a catalyst has been described. The catalyst exhibited clean reaction profile with excellent yields in a short reaction time. The catalyst can be recycled effectively after use. © 2012 Published by Elsevier Ltd. Source

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