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Browsing by Subject "Nanocomposites"

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Kinetically controlled localization of carbon nanotubes in polylactide/poly(vinylidenefluoride) blend nanocomposites and their influence on electromagnetic interference shielding, electrical conductivity, and rheological properties

Author: Salehiyan, Reza ; Nofar, M ; Ray, Suprakash S ; Ojijo, Vincent O Date: Jul 2019 This study illustrates the effects of the kinetic parameters [processing time, polyvinylidene fluoride (PVDF) viscosity, carbon nanotube (CNT) aspect ratio, and processing method] on the CNT migration and consequently the viscoelastic properties, ... Read more
Luminescent, magnetic and optical properties of ZnO-ZnS nanocomposites

Author: Raleaooa, PV ; Roodt, A ; Mhlongo, Gugu H ; Motaung, David E ; Kroon, RE ; Ntwaeaborwa, OM Date: Feb 2017 The structure, particle morphology, optical and magnetic properties of ZnO, ZnS and ZnO-ZnS nanoparticles prepared by the sol-gel method are reported. ZnO and ZnS were combined at room temperature by an ex situ synthetic route to prepare ... Read more
Mechanical and rheological response of polypropylene/boehmite nanocomposites

Author: Pedrazzoli, D ; Tuba, F ; Khumalo, VM ; Pegoretti, A ; Karger-Kocsis, J Date: 2014 In this work the influence of synthetic boehmite alumina (BA) nanoparticles with various surface treatments on the morphology, crystallization behavior and mechanical properties of polypropylene copolymer (PP) nanocomposites was studied. In ... Read more
Microwave assisted organic modification and surface functionalization of Phyllosilicates

Author: Kesavan Pillai, Sreejarani ; Moyo, Lumbidzani ; Ray, Suprakas S ; Scriba, Manfred R Date: Nov 2012 Organically modified phyllosilicates (montmorillonite and palygorskite) using Arquad 2HT-75 surfactant were effectively synthesized utilizing a microwave irradiation technique. The microwave method was successfully used also for the surface ... Read more
Morphology and properties of nanocomposites based on polymer blend and organoclay

Author: Gcwabaza, T ; Suprakas, SR ; Focke, WW Date: Oct 2008 Forming a polymer blend is a convenient method for obtaining materials with improves property performance. However, most chemically different polymers are immiscible and their blending leads to a material with weak interfacial adhesion and ... Read more
Novel polymer-based nanocomposites for application in heavy metal pollution remediation

Author: Kotzé-Jacobs, L Date: 10 Oct 2012 In this presentation the author provides insights into how novel polymer nanocomposites can be utilised in the extraction of heavy metals like Cr(VI) from polluted waters in order to provide purified water up to potable standards. Read more
Optimization and mechanism elucidation of the catalyticphoto-degradation of the dyes Eosin Yellow (EY) and Naphthol blueblack (NBB) by a polyaniline-coated titanium dioxide nanocomposite

Author: Debnath, S ; Ballav, N ; Nyoni, H ; Maity, Arjun ; Pillay, K Date: Feb 2015 A polyaniline-coated titanium oxide nanocomposite (PTO) was synthesized, characterized and used in the catalytic photo-degradation of the anionic dyes Eosin Yellow (EY) and Naphthol blue black (NBB). An emphasis was placed on the key parameters ... Read more
Overview of materials research in South Africa

Author: Du Preez, W Date: Sep 2011 This presentation provides an overview of materials research in South Africa. It highlights research done on batteries, polymers, nanocomposites and nano-metal matrix composites, piezoelectric materials, light metals and laser processing of ... Read more
Poly( E-caprolactone) nanocomposite scaffolds for tissue engineering: a brief overview

Author: Mkhabela, VJ ; Ray, Suprakas S Date: 2014 Polycaprolactone is a bioresorbable polymer that has been extensively used in the biomaterials field and a number of drug-delivery systems. The superior rheological and viscoelastic properties of this polymer render it easy to manufacture and ... Read more
Poly(Butylene Succinate) and Poly[(Butylene Succinate)-co-Adipate] Nanocomposites

Author: Ojijo, Vincent O ; Ray, Suprakas S Date: 2012 In the recent years, biodegradable aliphatic polyesters-based composite materials have attracted substantial interest, primarily due to their sustainable production, use and end-life. This chapter discusses the preparation, characterisation, ... Read more
Polymer based nanocomposites for the removal of Cr(VI) from water

Author: Setshedi, Katlego Z Date: 10 Oct 2012 In this presentation the author outlines how the polymer-based nanocomposites can be used as adsorbents to remove hexavalent Cr(VI) from wastewater streams. Read more
Polymer nanocomposite processing, characterization, and applications 2013

Author: Mago, G ; Ray, Suprakas S ; Shofner, ML ; Wang, S ; Zhang, J Date: Feb 2014 Nanoparticles, such as carbon nanotubes, nanoclays, and graphenes, are widely used in the polymer nanocomposites to alter the chemical, mechanical, electrical, optical, and thermal properties. However, a number of critical issues need to be ... Read more
Polymer-noble metal nanocomposites: Review

Author: Folarin, OM ; Sadiku, ER ; Maity, Arjun Date: Sep 2011 Polymer-noble metal nanocomposites have been extensively investigated due to their potential ability to provide materials with novel mechanical, electronic or chemical behaviour for technological applications. Many preparative procedures have ... Read more
Polymer/layered silicates nanocomposites for barrier technology

Author: Labuschagne, Philip W ; Moolman, S ; Maity, Arjun Date: Feb 2012 Plastics are used increasingly in packaging applications due to a number of favorable properties, such as versatility, low weight, and low cost. However, their biggest drawback when compared to traditional packaging materials, such as glass ... Read more
Polypyrrole-coated halloysite nanotube clay nanocomposite: synthesis, characterization and Cr(VI) adsorption behaviour

Author: Ballav, N ; Choi, HJ ; Mishra, SB ; Maity, Arjun Date: Dec 2014 A polypyrrole-coated halloysite nanotube nanocomposite (PPy-HNTs NC) was prepared via in situ polymerization of pyrrole (Py) in the dispersion of HNTs and assessed for the removal of toxic Cr(VI) from aqueous solutions. ATR-FTIR and XRD results ... Read more
Polystyrene/TiO2 composite electrospun fibers as fillers for poly(butylene succinate-co-adipate): Structure, morphology and properties

Author: Neppalli, R ; Causin, V ; Benetti, EM ; Ray, Suprakas S ; Esposito, A ; Wanjale, S ; Birajdar, M ; Saiter, J-M ; Marigo, A Date: 2014 In this work, composite polystyrene/titanium dioxide (PS/TiO(sub2)) electrospun fibers were used as a reinforcement for a poly(butylene succinate-co-adipate) (PBSA) matrix. The structure, morphology, mechanical properties and degradation ... Read more
Preparation and characterization of carbon/nickel oxide nanocomposite coatings for solar absorber applications

Author: Roro, Kittessa T ; Tile, N ; Forbes, A Date: Apr 2012 Nanocomposite materials have wide range of applications in solar energy conversion. In this work, C/NiO nanocomposite solar energy absorbing surfaces were prepared using sol-gel synthesis and deposited on aluminium substrates using a spin ... Read more
Preparation and characterization of WO3/Bi3O4Cl nanocomposite and its photocatalytic behavior under visible light irradiation

Author: Chakraborty, AK ; Kebede, Mesfin A Date: Jan 2012 The highly efficient and visible light ( = 420 nm) responsive composite photocatalyst WO3/Bi3O4Cl was prepared by the simple incipient wetness method. The heterojunction structure WO3/Bi3O4Cl demonstrated notably higher photocatalytic activity ... Read more
Processing nanocomposites based on commodity polymers

Author: Mural, PKS ; Ray, Suprakas S Date: Oct 2018 Nanocomposites consisting of commodity polymers like polyethylene, polystyrene, polypropylene, and polyvinyl chloride have demonstrated good thermomechanical behavior and electrical properties. Common routes for producing polymer nanocomposites ... Read more
Processing of polymer blends, emphasizing: Melt compounding: influence of nanoparticles on blend morphology and rheology; reactive processing in ternary systems; morphology -property relationships; performance application challenges; and opportunities and future trends

Author: Salehiyan, Reza ; Ray, Suprakas S Date: Oct 2018 This chapter discusses the structure-properties of immiscible polymer blends, focusing on the effects of compatibilization. It has been discussed that the morphology of immiscible blends governs their final properties and thus end-use ... Read more

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