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Browsing by Author "Malwela, Thomas"

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Characterization of polypropylene/polystyrene boehmite alumina nanocomposites: Impact of filler surface modification on the mechanical, thermal, and rheological properties

Author: Malwela, Thomas ; Khumalo, VM ; Salehiyan, Reza ; Ray, Suprakas S Date: Jul 2018 The influences of surface treatment and the concentration of boehmite alumina (BA) particles on polypropylene and polystyrene (PS) (80/20) blends produced via melt compounding were examined. The results show that p-toluene sulfonic acid-treated ... Read more
Effect of Organoclay on the Properties of Maleic Anhydride-Grafted Polypropylene and Poly(methyl methacrylate) Blend

Author: Hato, Mpitloane Joseph ; Motaung, David E ; Choi, Hyoung Jin ; Scriba, Manfred R ; Khumalo, Vincent M ; Malwela, Thomas Date: Mar 2017 Poly(methyl methacrylate)/polypropylene (PMMA/PP) and PMMA/maleic-anhydride grafted PP (MAPP) blends and their blend nanocomposites containing 2 wt% organoclay (Cloisite 15A, denoted C15A), prepared by a melt mixer were studied. Both X-ray ... Read more
Effect of varying ethanol and water compositions on the acetone sensing properties of WO3 for application in diabetes mellitus monitoring

Author: Saasa, Valentine ; Lemmer, Yolandy ; Malwela, Thomas ; Akande, Amos A ; Beukes, M ; Mwakikunga, Bonex W Date: Mar 2020 Tungsten oxide based gas sensors have attracted a lot of attention in breath acetone analysis due to their potential in clinical diagnosis of diabetes. The major problem with this material in sensor application has been remarkable response ... Read more
Enhancing the adhesion strength of polyurethane coatings by dispersing layered silicates via sonication and high-shear mixing method

Author: Skosana, Sifiso J ; Khoathane, C ; Malwela, Thomas Date: Jan 2020 Low adhesion strength of polyurethane coating to a steel substrate is often attributed to poor steel preparation. However, the ratio of diisocyanate/polyol and dispersion of fillers within a polyurethane coating matrix influence the adhesion ... Read more
The hierarchical nanostructured Co-doped WO3/carbon and their improved acetone sensing performance

Author: Saasa, Valentine R ; Malwela, Thomas ; Lemmer, Yolandy ; Beukes, M ; Mwakikunga, Bonex W Date: Oct 2020 Hierarchical nanostructured Co-doped WO3 with carbon as template has been successfully synthesised through facile sol-gel method. The synthesised Co-doped WO3 was characterized by X-ray diffraction, Scanning electron microscopy, Transmission ... Read more
Sensing technologies for detection of acetone in human breath for diabetes diagnosis and monitoring

Author: Saasa, Valentine R ; Malwela, Thomas ; Beukes, M ; Mokgotho, M ; Liu, CP ; Mwakikunga, Bonex W Date: Jan 2018 The review describes the technologies used in the field of breath analysis to diagnose and monitor diabetes mellitus. Currently the diagnosis and monitoring of blood glucose and ketone bodies that are used in clinical studies involve the use ... Read more
Thermo-oxidative degradation study of melt-processed polyethylene and its blend with polyamide using time-resolved rheometry

Author: Salehiyan, Reza ; Malwela, Thomas ; Ray, Suprakas S Date: May 2017 Time-resolved mechanical spectroscopy (TRMS) was conducted to study the thermo-oxidative degradation of linear low density polyethylene (LLDPE) samples with different thermal histories and their blends with a polyamide (PA6) in the melt state. ... Read more

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Browsing by Author "Malwela, Thomas"

Browsing by Author "Malwela, Thomas"

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