ResearchSpace
→
Browsing by Author

Browsing by Author "Kesavan Pillai, Sreejarani"

Now showing items 21-40 of 44

Influence of citric acid on SnO2 nanoparticles synthesized by wet chemical processes

Author: Sikhwivhilu, LM ; Kesavan Pillai, Sreejarani ; Hillie TK Date: Oct 2010 Tin oxide (SnO2) nanoparticles with size range of 19 to 100 nm were successfully synthesized using wet chemical process (i.e. chemical precipitation and sol-gel processes). The results showed that variation of citric acid concentration directly ... Read more
Inorganic layered double hydroxides as a 4-hexyl resorcinol delivery system for topical applications

Author: Mosangi, Damodar ; Kesavan Pillai, Sreejarani ; Moyo, Lumbidzani ; Ray, Suprakas S Date: Aug 2016 In this study, the hydrophobic even skin tone active, 4-hexylresorcinol (HR), was intercalated into a zinc aluminium layered double hydroxide (ZnAl-LDH) by a co-precipitation method and used as a controlled release ingredient in skin care ... Read more c b
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
Layered double hydroxide-based functional nanohybrids as controlled release carries of pharmaceutically active ingredients

Author: Ray, Suprakas S ; Mosangi, Damodar ; Kesavan Pillai, Sreejarani Date: Jul 2018 The chemical stability, degradation and penetration ability of pharmaceutically active ingredients in topical formulations are the greatest challenges because of problems with the protection of actives for long times and with delivery. ... Read more
Layered double hydroxides: An advanced encapsulation and delivery system for cosmetic ingredients-an overview

Author: Kesavan Pillai, Sreejarani ; Kleyi, Phumelele E ; De Beer, Marinda ; Mudaly, Preensha Date: Dec 2020 Topical delivery of active ingredients is very challenging because of the complex structure and excellent barrier properties of human skin. Advances in nanotechnology resulted in nanomaterial based delivery systems to augment the skin absorption ... Read more
Materials science challenges in skin UV protection: A review

Author: Egambaram, Orielia P ; Kesavan Pillai, Sreejarani ; Ray, Suprakas S Date: Mar 2020 UV radiation is one of the critical environmental stress factors for human skin, which can trigger various problems such as pruritus, burning, erythema, premature skin aging and skin cancer. Hence, UV protection has become an indispensable ... Read more
Materials science challenges in skin UV protection: A review

Author: Egambaram, Orielia P ; Kesavan Pillai, Sreejarani ; Ray, Suprakas S Date: Mar 2020 UV radiation is one of the critical environmental stress factors for human skin, which can trigger various problems such as pruritus, burning, erythema, premature skin aging and skin cancer. Hence, UV protection has become an indispensable ... Read more
Microwave assisted green synthesis and characterization of silver/montmorillonite heterostructures with improved antimicrobial properties

Author: Kesavan Pillai, Sreejarani ; Ray, Suprakas S ; Scriba, Manfred R ; Bandyopadhyay, J ; Roux-van der Merwe, MP ; Badenhorst, J Date: Oct 2013 Silver (Ag)/montmorillonite (Mt) heterostructures were effectively synthesized utilising microwave (MW) irradiation technique in the absence of any reducing agent. Compared to conventional thermal reduction processes, this approach is simple, ... 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
Microwave synthesis and characterisation of tin dioxide (SnO2) coated multi-walled carbon nanotubes

Author: Motshekga, S ; Kesavan Pillai, Sreejarani ; Ray, Suprakas S ; Krause, R ; Jalama, K Date: 01 Sep 2010 Metal nanoparticles coated onto carbon nanotubes (CNTs) provide a way to obtain novel materials with useful properties for gas sensing and catalyst application. Metal oxides are well-known materials suitable for detecting a wide spectrum of ... 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
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
Nanostructured Zn-Ti layered double hydroxides with reduced photocatalytic activity for sunscreen application

Author: Egambaram, Oriela P ; Kesavan Pillai, Sreejarani ; Lategan, M ; Ray, Suprakas S Date: Mar 2019 The harmful effects of long-term UV exposure on human skin are increasingly understood these days, and therefore, the use of topical sunscreen products containing UV filters has significantly increased. Although the currently used organic and ... Read more
One-step synthesis and characterization of CoS-Nanoparticles decorated multi-walled carbon nanotubes

Author: Kesavan Pillai, Sreejarani ; Moloto, N ; Ray, SS Date: Feb 2009 The organization of metal or semiconductor nanoparticles like quantum dots (QDs) on carbon nanotubes (CNTs) is one good example motivated by the desire to combine the properties of two functional nanoscale materials to achieve a wider range ... Read more
Oxidation of 4-methoxy-1-naphthol on promoted platinum catalysts

Author: Maphoru, MV ; Heveling, J ; Kesavan Pillai, Sreejarani Date: Jul 2017 Oxidative coupling of naphthols is a useful method for the formation of new carbon-carbon bonds in organic synthesis. In the presence of hydrogen peroxide, platinum supported on activated carbon catalyses this reaction. The outcome is influenced ... Read more
Oxidative coupling of 1-naphthols over noble and base metal catalysts

Author: Maphoru, MV ; Heveling, J ; Kesavan Pillai, Sreejarani Date: Jan 2014 Bismuth-promoted platinum catalysts were tested for the oxidative coupling of 2- and 4-substituted 1-naphthols at different temperatures and ambient pressure. The principal final products are the 3,3'-substituted 1,1'-binaphthalenylidene-4,4'-diones ... Read more
Recent trends in the microwave-assisted synthesis of metal oxide nanoparticles supported on carbon nanotubes and their applications

Author: Motshekga, SC ; Kesavan Pillai, Sreejarani ; Ray, Suprakas S ; Jalama, K ; Krause, RWM Date: Jan 2012 The study of coating carbon nanotubes with metal/oxides nanoparticles is now becoming a promising and challenging area of research. To optimize the use of carbon nanotubes in various applications, it is necessary to attach functional groups ... Read more
Rheological characteristics of petroleum jelly formulations containing organically modified layered double hydroxides

Author: Mosangi, Damodar ; Kesavan Pillai, Sreejarani ; Moyo, Lumbidzani ; Ray, Suprakas S Date: Sep 2018 The effectiveness of stearic acid modified layered double hydroxides (OLDH) as viscosity modifier and stabilizer in petroleum jelly (PJ) formulations has been studied and its rheological properties evaluated. Mg-Al-LDH was organically modified ... Read more
Solvent and temperature effects on the platinum-catalyzed oxidative coupling of 1-naphthols

Author: Maphoru, MV ; Heveling, J ; Kesavan Pillai, Sreejarani Date: Aug 2015 Using H(sub2)O(sub2) as the oxidant, 1-naphthols with electron-donating groups at the 2- and 4-positions couple oxidatively over a carbon-supported platinum catalyst to 3,3'-substituted 1,1'-binaphthalenylidene-4,4'-diones and 4,4'-substituted ... Read more
Structure-activity relationships of carbon-supported platinum-bismuth and platinum-antimony oxidation catalysts

Author: Maphoru, MV ; Kesavan Pillai, Sreejarani ; Heveling, J Date: Apr 2017 Compositional and morphological studies on supported platinum are important for the improvement and expanded use of catalysts for oxidative coupling reactions. Nanocomposites consisting of 5% Pt supported on activated carbon and promoted with ... Read more

Now showing items 21-40 of 44

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.