Browsing by Author "Naeem, Salman"
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- ItemElectrical Conductivity of PLA Films Reinforced With Carbon Nano Particles from Waste Acrylic Fibers(2018) Naeem, Salman; Gilani, Syed Qummer Zia; Baheti, Vijay; Wiener, Jakub; Militký, Jiří; Javed, Saima; Ali, Azam; Javed, Zafar; ul Hassan, Syed ZameerThe acrylic fibrous waste was effectively transformed into activated carbon through physical activation in single stage carbonization under charcoal using at different carbonization temperatures 800, 1000 and 1200 degrees C. The characterization of carbonized fibers was performed with the help of XRD and EDX in order to find out the degree of crystallinity and proportion of different elements in carbonized fibres prepared at different temperatures. Later on, the carbonized fibers were pulverized in dry conditions by high energy planetary ball milling to get activated carbon micro/nano particles. In addition to refinement of size, the electrical conductivity of pulverized carbon particles was found to increase with increase in milling time. Subsequently, the particles were incorporated into poly lactic acid (PLA) in different loadings from 1 to 10% to develop conductive green composite films The composite films were then characterized for electrical, thermo-mechanical and thermal properties.
- ItemMultifunctional polylactic acid composites filled with activated carbon particles obtained from acrylic fibrous wastes(2019-02) Naeem, Salman; Baheti, Vijay; Militký, Jiří; Ali, AzamThe objective of this work was to explore the potentials of porous and electrically conductive activated carbon particles for possible enhancement of multifunctional properties of PLA. The activated carbon was inexpensively prepared from acrylic fibrous wastes by novel single stage carbonization and physical activation. The influence of 800 degrees C, 1,000 degrees C, and 1,200 degrees C carbonization temperature on physical, morphological, and electrical properties was studied from EDX, X-ray diffraction, SEM, and BET analysis. Later, the carbonized acrylic fibrous waste was pulverized in dry conditions by high energy planetary ball milling to get activated carbon particles. The particles were then incorporated into PLA under 1, 5 and 10 wt% loading to prepare composite films by solvent casting, and their electrical conductivity, EMI shielding, thermo-mechanical, and thermal stability properties were investigated.