ResearchSpace
→
Browsing by Author

Browsing by Author "Ray, SS"

Now showing items 35-54 of 78

Induced ferromagnetic and gas sensing properties in ZnO-nanostructures by altering defect concentration of oxygen and zinc vacancies

Author: Motaung, DE ; Makgwane, Peter R ; Ray, SS Date: Jan 2015 We report on the effect of the synthesis reaction-time on the structural, optical, magnetic and sensing properties of ZnO-nanostructures. Electron paramagnetic resonance and photoluminescence analyses reveal that singly ionized oxygen vacancies ... Read more
Influence of bases on hydrothermal synthesis of titanate nanostructures

Author: Sikhwivhilu, LM ; Ray, SS ; Coville, NJ Date: Mar 2009 A hydrothermal treatment of titanium dioxide (TiO2) with various bases (i.e., LiOH, NaOH, KOH, and NH4OH) was used to prepare materials with unique morphologies, relatively small crystallite sizes, and large specific surface areas. The ... Read more
Influence of boehmite nanoparticle loading on the mechanical, thermal, and rheological properties of biodegradable polylactide/ poly(e-caprolactone) blends

Author: Agwuncha, SC ; Ray, SS ; Jayaramudu, J ; Khoathan, C ; Sadiku, R Date: Jan 2015 Blends of polylactide (PLA) and poly(e-caprolactone) (PCL) were melt-processed with boehmite (BAI) nanoparticles to produce ternary biocomposites with the intent of broadening the potential applications of PLA. The mechanical properties of ... Read more
Inorganic-organic hybrid polymers for food packaging

Author: Kesavan Pillai, Sreejarani ; Ray, SS Date: Sep 2015 The use of polymer materials in food packaging is one of the fastest growing global trends. There has been serious interest and effort over the last few years in the advancement of novel food packaging concepts which can play a proactive role ... Read more
An instant photo-excited electrons relaxation on the photo-degradation properties of TiO2-x films

Author: Nkosi, SS ; Kortidis, I ; Motaung, DE ; Makgwane, Peter R ; Ndwandwe, OM ; Ray, SS ; Kiriakidis, G Date: Nov 2014 Pure and manganese (Mn) ion-doped TiO(sub2) films were grown by pulsed laser deposition under vacuum at different substrate temperatures 350 and 580 C for 50 min each. The concentration of the Mn inTiO(sub2) films was varied from 10 to 30%. ... Read more
Interface of nanocatalysis and microfluidic reactors for green chemistry methods

Author: Makgwane, Peter R ; Ray, SS Date: Oct 2013 The development of green catalytic methods for chemical synthesis and energy generation based on nanocoated catalyst microfluidic systems is a growing area of innovative research. The interface between heterogeneous catalysis and microchannel ... Read more
Investigation of physicochemical properties of Ag doped ZnO nanoparticles prepared by chemical route

Author: Gayathri, S ; Ghosh, OSN ; Sathishkumar, S ; Sudhakara, S ; Jayaramudu, J ; Ray, SS ; Viswanath, AK Date: Dec 2015 In this report we have demonstrated the synthesis of silver doped and pure ZnO nanoparticles using facile chemical precipitation method. The crystal structure, optical and magnetic properties of the synthesized nanocrystals were determined ... Read more
Kinetic models for the release of the anticancer drug doxorubicin from biodegradable polylactide/metal oxide-based hybrids

Author: Mhlanga, N ; Ray, SS Date: Jan 2015 For decades, studies on drug-release kinetics have been an important topic in the field of drug delivery because they provide important insights into the mechanism of drug release from carriers. In this work, polylactide (PLA), doxorubicin ... Read more
Kinetic release studies of nitrogen-containing bisphosphonate fromgum acacia crosslinked hydrogels

Author: Aderibigbe, BA ; Varaprasad, K ; Sadiku, ER ; Ray, SS ; Mbianda, XY ; Fotsing, MC ; Owonubi, SJ ; Agwuncha, SC Date: Nov 2014 Natural polymer hydrogels are useful for controlling release of drugs. In this study, hydrogels containinggum acacia were synthesized by free-radical polymerization of acrylamide with gum acacia. The effect ofgum acacia in the hydrogels on ... Read more
Magnetic carbonyl iron suspension with organoclay additive and its magnetorheological properties

Author: Hato, MJ ; Choi, HJ ; Sim, HH ; Park, BO ; Ray, SS Date: Feb 2011 Soft magnetic carbonyl iron (CI) based magnetorheological (MR) fluids containing three different loadings of submicron-sized organoclay were prepared. The MR characteristics were measured via rotational and oscillatory tests, in which the ... Read more
Mechanical properties of uniaxial natural fabric Grewia tilifolia reinforced epoxy based composites: Effects of chemical treatment

Author: Jayaramudu, J ; Siva Mohan Reddy, G ; Varaprasad, K ; Sadiku, ER ; Ray, SS ; Varada Rajulu, A Date: Jul 2014 The effects of chemical treatment on the mechanical, morphological, and chemical resistance properties of uniaxial natural fabrics, Grewia tilifolia/epoxy composites, were studied. In order to enhance the interfacial bonding between the epoxy ... Read more
Mechanical, barrier and antimicrobial properties of biodegradable poly(e-caprolactone) nanocomposites

Author: Makhado, E ; Ray, SS Date: May 2015 Environmentally friendly antimicrobial packaging materials are of great interest because they can delay microbial growth on the surface of foods, thus enhancing shelf-life. In this study, we synthesized a new type of organically modified clay ... Read more
Metal oxide nanostructures-containing organic polymer hybrid solarcells: Optimization of processing parameters on cell performance

Author: Motaung, DE ; Makgwane, Peter R ; Ray, SS Date: Jul 2015 We report the chemical synthesis of various ZnO nanostructures and TiO2 nanoparticles and their dispersion in a P3HT matrix. The photoluminescence studies revealed improved charge transport in the active layer of the optimized TiO2 nanoparticles ... Read more
Morphological and thermal properties of photodegradable biocomposite films

Author: Kesavan Pillai, Sreejarani ; Ray, SS ; Scriba, Manfred R ; Ojijo, Vincent O ; Hato, MJ Date: Jul 2013 Biocomposites containing ultraviolet (UV) radiation absorbing inorganic nanofillers are of great interest in food packaging applications. The biodegradable polylactide (PLA) composite films were prepared by solvent casting method by incorporating ... Read more
Morphology and thermal properties of compatibilized PA12/PP blends with boehmite alumina nanofiller inclusions

Author: Ogunniran, ES ; Sadiku, R ; Ray, SS ; Luruli, N Date: Dec 2011 Boehmite alumina nanoparticles are added to PP-g-MAH-compatibilized blends of PA 12 and PP to study the effects of nanoparticle loading in the resulting composites. WAXD and SEM data suggest that the nanoparticles enhanced the coalescence of ... Read more
Morphology, thermal properties and crystallization kinetics of ternary blends of the polylactide and starch biopolymers and nanoclay: The role of nanoclay hydrophobicity

Author: Wokadala, OC ; Ray, SS ; Bandyopadhyay, J ; Wesley-Smith, J ; Emmambux, NM Date: Aug 2015 Polylactide/butylated-starch/nanoclay (70/25.5/4.5 wt%) composites were prepared by melt blending with nanoclays of varying hydrophobicity. Electron microscopy studies indicated that the interphase boundary interaction was highest in the clay ... Read more
Multifunctional nanobiocomposite of Poly[(butylene succinate)-co-adipate] and clay

Author: Al-Thabaiti, SA ; Ray, SS ; Basahel, SN ; Mokhtar, M Date: Mar 2015 The processing and characterization of multifunctional nanobiocomposite of biodegradable poly[(butylene succinate)-co-adipate] (PBSA) and organically modified synthetic fluorine mica (OSFM) are reported. The nanobiocomposite of PBSA with OSFM ... Read more
Nafion-based nanocomposite membranes for fuel cells

Author: Cele, NP ; Ray, SS ; Kesavan Pillai, Sreejarani ; Arendse, C ; Ndwandwe, N Date: Nov 2008 Nafion nanocomposites were prepared with pure multiwalled carbon nanotubes (PMWCNTs), oxidised MWCNTs (OMWCNTs) and functionalised MWCNTs (FMWCNTs) as fillers, to investigate the effect of multiwalled carbon nanotubes on thermal stability, ... Read more
A new series of two-ring-based side chain liquid crystalline polymers: synthesis and mesophase characterization

Author: Reddy, GSM ; Narasimhaswamy, T ; Jayaramudu, J ; Sadiku, ER ; Raju, KM ; Ray, SS Date: May 2013 A new series of side chain liquid crystalline polymers containing a core, a butamethylenoxy spacer, ester groups, and terminal alkoxy groups were synthesised and their structures were confirmed. The core was constructed with two phenyl rings ... Read more
Nitrogen-doped carbon nanotubes as a metal catalyst support

Author: Mabena, LF ; Ray, SS ; Mhlanga, SD ; Coville, NJ Date: May 2011 The science and technology of catalysis is of fundamental importance to a national economy. Today about 90% of all technical chemicals are manufactured by the use of catalysts. Nanoparticles of noble metals are extremely important materials ... Read more

Now showing items 35-54 of 78

Browse

All of ResearchSpace

Quick Links

Legislation and compliance

General Enquiries

Tel: + 27 12 841 2911
Email: callcentre@csir.co.za

Physical Address
Meiring Naudé Road
Brummeria
Pretoria
South Africa

Postal Address
PO Box 395
Pretoria 0001
South Africa

Social Connect

Copyright © CSIR 2017. All Rights Reserved

Resources on this site are free to download and reuse according to associated licensing provision. Please read the terms and conditions of usage of each resource.