In this article, modification of mercerized flax (MFx) through graft co-polymerization with methylmethacrylate (MMA) using ferrous ammonium sulphate-potassium per sulphate (FAS-KPS) redox initiator has been reported. Water uptake and moisture absorbance properties of methylmethacrylate grafted mercerized flax (MFx-g-MMA) and mechanical behavior of raw flax, mercerized flax, and MFx-g-MMA fibers reinforced-polystyrene matrix-based composites also have been evaluated. Four reaction parameters, reaction temperature, reaction time, initiator molar ratio, and monomer concentration, have been optimized to get maximum graft yield. Maximum graft yield of 138.35% has been obtained at optimum reaction conditions. The graft co-polymers thus formed were characterized by FTIR, TGA, and SEM techniques. Mercerized flax fiber reinforced showed better results than raw flax and MFx-g-MMA fibers reinforced composites.
In recent times, demand for light weight and high strength materials fabricated from natural fibres has increased tremendously. The use of natural fibres has rapidly increased due to their high availability, low density, and renewable capability over synthetic fibre. Natural leaf fibres are easy to extract from the plant (retting process is easy), which offers high stiffness, less energy consumption, less health risk, environment friendly, and better insulation property than the synthetic fibre-based composite. Natural leaf fibre composites have low machining wear with low cost and excellent performance in engineering applications, and hence established as superior reinforcing materials compared to other plant fibres. In this review, the physical and mechanical properties of different natural leaf fibre-based composites are addressed. The influences of fibre loading and fibre length on mechanical properties are discussed for different matrices-based composite materials. The surface modifications of natural fibre also play a crucial role in improving physical and mechanical properties regarding composite materials due to improved fibre/matrix adhesion. Additionally, the present review also deals with the effect of silane-treated leaf fibre-reinforced thermoset composite, which play an important role in enhancing the mechanical and physical properties of the composites.
The present research focuses on studying the physical, mechanical, and abrasive wear behavior of the hemp/nettle natural fiber woven mat reinforced with the polyester matrix. The hemp and nettle fibers woven mats were reinforced into the polyester matrix by simple hand-layup, and after that compression molding process was used to fabricate the composites. The water absorption, tensile, flexural, and impact properties were studied using a hemp/nettle hybrid composite. This study found that increasing the amount of hemp and nettle fiber in polyester from 3 to 9 wt% increased the mechanical properties of hybrid composites. The higher weight percentage (9 wt%) of hemp/nettle fiber in polyester hybrid composites exhibited the highest tensile (42.41 MPa), flexural (78.52 MPa), impact (22.72 kJ/m 2 ) strength, and a higher hardness value of 46.7 HV. Finite element analysis simulation is conducted on mechanical
Remarkable progress
has been established in the field of nanoenergetic
materials (mixture of nanoscale fuel and oxidizer) since the advent
of nanotechnology. Combustion of nanoenergetic materials depends on
many key factors like synthesis route, equivalence ratio, morphology
of constituents, and arrangements and handling of materials. For tailoring
and tuning of the combustion properties of nanoenergetics, sound knowledge
of the reaction mechanism is needed; in this review article a schematic
study on the reaction mechanism is presented. By employing various
routes and strategies in synthesizing and nanoengineering of the fuel
or/and oxidizer to realize a significant evolution from normal physical
mixing of nanopowders to the formulation of core/shell nanostructures,
the nanoenergetic materials achieved the best ever combustion properties
in terms of combustion reactivity, ignition sensitivity, energy density,
etc. Overall, in this article, a critical state-of-the-art review
of the existing literatures has been conducted to feature the main
developments in the molecular combustion modeling of melting, oxidation,
and core–shell reaction/diffusion of nanoaluminum and the molecular
modeling of combustion reactivity and ignition sensitivity of nanoenergetic
materials.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.