Mou'ad A. Tarawneh

Bio: Mou'ad A. Tarawneh is an academic researcher from Al-Hussein Bin Talal University. The author has contributed to research in topics: Natural rubber & Nanocomposite. The author has an hindex of 12, co-authored 53 publications receiving 399 citations. Previous affiliations of Mou'ad A. Tarawneh include National University of Malaysia & Universiti Teknologi MARA.

Mechanical, water absorption, and morphology of recycled polymer blend rice husk flour biocomposites

Abstract: Rice husk flour (RHF) biocomposites based on uncompatibilized and compatibilized recycled high density polyethylene/recycled polyethylene terephthalate (rHDPE/rPET) with ethylene-glycidyl methacrylate (E-GMA) copolymer were prepared through a two-step extrusion and hot pressing with fiber loadings of 40, 60, and 80 wt %. Results showed that tensile and flexural properties increased. However, the elongation to break and impact strength decreased as the RHF loading increased. Compatibilizing polymer blend matrices can further enhance the mechanical properties. Water absorption (WA) test were examined in distilled and seawater. It is interesting to note that for composites made from uncompatibilized matrix, the calculated D and KSR were lower in seawater, but for the compatibilized matrix composites, the D and KSR obtained were generally lower in distilled water. However, compatibilization of rHDPE/rPET has been markedly reduced the WA and thickness swelling. Scanning electron microscope analysis of the compatibilized matrix composites confirmed the improved interfacial bonding of matrix–matrix and filler–matrix phases. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41494.

Rice husk flour biocomposites based on recycled high-density polyethylene/polyethylene terephthalate blend: Effect of high filler loading on physical, mechanical and thermal properties

Abstract: Biocomposites of recycled high-density polyethylene (rHDPE)/recycled polyethylene terephthalate (rPET) matrices with a high loading of rice husk flour (RHF) were fabricated through a two-step extru

Thermal conductivity and dynamic mechanical analysis of NiZn ferrite nanoparticles filled thermoplastic natural rubber nanocomposite

Abstract: The effect of NiZn ferrite nanoparticles on the thermal behaviour of thermoplastic natural rubber (TPNR) composite is investigated. Melt blending technique was employed to prepare TPNR matrix, which comprised of natural rubber (NR), liquid natural rubber (LNR) and high-density polyethylene (HDPE) in a ratio of 20:10:70. Dynamic mechanical analysis results show that the thermal stability of the nanocomposites enhanced with increasing filler loading. Moreover, thermal conductivity of the nanocomposites increased with filler content until 8 wt%, which is believed to be the optimum loading that formed the suitable percolated network for phonon conduction facilitation.

Electromagnetic Simulation Using The Fdtd Method

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Functionalization of single walled carbon nanotubes

Abstract: Functionalization of Single Walled Carbon Nanotubes B y Lei Zhang Single walled carbon nanotubes (SWNTs) exhibit unique mechanical and physical properties and immediately after their discovery they were regarded as novel materials for future technologies. SWNTs are widely thought o f as one o f the basic building blocks to nanotechnology. However, they are very hard to disperse and dissolve in either water or organic solvent. The insolubility o f nanotubes makes it very difficult to make composites o f nanotubes with other materials. This limits nanotubes from the application for future technology. A feasible functionalization o f nanotubes, i.e., the attachment o f “chemical functional groups” provides a strategy for overcoming these barriers and has thus attracted synthetic chemists and materials scientists to contribute their efforts to making breakthrough. Functionalization can improve solubility and processibility, and will be able to link the unique properties o f nanotubes to those o f other types o f materials. Through the chemical functional groups, nanotube may show improved solubility and compatibility with solvents, polymers, nanoparticles and other nanotubes. A functionalized SWNT may have mechanical or electrical properties that are different from those o f the pristine SWNT, and thus may be used for fine-tuning the chemistry and physical properties o f SWNTs. Fluorination o f side walls o f the SWNTs has been performed by using the technology developed for the fluorination o f graphite, and then subsequent nucleophilic substitutions have been explored. It has been ascertained that in fluorination at the optimal temperature, C:F ratios o f up to 2:1 can be achieved without disruption o f the tubular structure. The fluorinated SWNTs proved to be much more soluble than pristine SWNTs in alcohols, N,N-dimethylformamide and some other selected organic solvents. This improved solubility and the high fluorine addition allow much more efficient solution-phase chemistry on the fluorinated SWNTs. R e p ro d u c e d with p erm iss ion of th e copyright ow ner. F u r the r reproduction prohibited without perm iss ion . The goals o f this work were to examine novel type o f reactions that one can do with fluorinated SWNTs and study the basic aspects o f functionalization o f SWNTs, i.e. the mechanism o f functionalization, the structure o f fluorinated SWNTs, and the distribution o f functional groups in the functionalized SWNTs. In this thesis, an extensive NMR study o f fluorinated SWNTs has been explored (Chapter 1) and this study gives us a deeper insight to the structure o f fluorinated SWNTs and the mechanism o f fluorination. A series o f “hydroxyl nanotube” have been simply prepared by two types o f one-step methods (Chapter 2). Amino-acid functionalized nanotubes with high water solubility and sensitive pH value dependence have been achieved, and the influence o f different chain length o f amino acid on the water solubility was detailed (Chapter 3). The nanotube-nanoparticle heterostructures have been prepared and used to investigate the distribution o f functional groups along the axis o f nanotubes (Chapter 4). Finally, a novel type o f reaction, Diels-Alder cycloaddition to fluorinated nanotubes was successfully performed under a mild reaction conditions (Chapter 5). R e p ro d u c e d with p erm iss ion of th e copyright ow ner. F u r the r reproduction prohibited without perm iss ion .

Recent advances in bio‐based epoxy resins and bio‐based epoxy curing agents

Abstract: The combination of awareness of harmful industrial processes and environmental issues and depleting petroleum-based resources has spurred much research in developing materials from renewable sources. Epoxy resins are common pre-polymers used in a variety of industries, such as adhesives, coatings, insulations, and high performance composites. To transform epoxy resins into crosslinked networks with desirable thermal and mechanical properties, the resins must be cured with a curing agent. This review encompasses recent developments using bio-based epoxy resins and bio-based epoxy curing agents. Resins and curing agents synthesized from modified plant oils, sugars, polyphenols, terpenes, rosin, natural rubber, and lignin are highlighted and their thermal and mechanical properties reviewed. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44103.

Rice Husk Filled Polymer Composites

Abstract: Natural fibers from agricultural wastes are finding their importance in the polymer industry due to the many advantages such as their light weight, low cost and being environmentally friendly. Rice husk (RH) is a natural sheath that forms around rice grains during their growth. As a type of natural fiber obtained from agroindustrial waste, RH can be used as filler in composites materials in various polymer matrices. This review paper is aimed at highlighting previous works of RH filled polymer composites to provide information for applications and further research in this area. Based on the information gathered, application of RH filled composites as alternative materials in building and construction is highly plausible with both light weight and low cost being their main driving forces. However, further investigations on physical and chemical treatment to further improve the interfacial adhesion with polymeric matrix are needed as fiber-polymer interaction is crucial in determining the final composite properties. Better understanding on how the used polymer blends as the matrix and secondary fillers may affect the properties would provide interesting areas to be explored.