1. CSIR Materials Science and Manufacturing, Polymers and Composites Competence Area; Nonwovens and Composites Research Group; Summerstrand Port Elizabeth 6000 South Africa
2. Department of Chemistry; University of the Free State (Qwaqwa Campus); Phuthaditjhaba 9866 South Africa
3. Department of Physics; University of the Free State (Qwaqwa Campus); Phuthaditjhaba 9866 South Africa