Natural fibers are renewable materials and have the ability to recycle. But, they are hydrophilic in nature and exhibit poor resistance to moisture.The main associated in developing new composite is adhesion property existing between fiber and matrix which can be enhanced by chemical variation which result in reducing hydrophilic nature. The powder with small particles was preferred since when the size of the particle decreases the intermolecular force adhesion increases. In this research work, matrix involving polyester resin possessing 62.07 of molecular weight (Mw) combined with rice husk (RH) to create an Hybridized Wood-Plastic Composite (HWPC). The impact of contribution of RH, wood powder by both contribution percent and its particle size are evaluated by investing its flexural, tensile and impact properties of HWPC. The investigation infers that by analyzing the percent of RH, wood powder, polyester resin matrix by weight ratio, it is inferred that the wood powder proportion increment increases the tensile property. Meanwhile, after reaching its maximum bar limit, it causes the impact and tensile property to get minimized rate. From mechanical properties analysis it results that high flexural strength can be obtained by smaller RH size utilization where it increases the interaction between RH and wood powder due to reduced voids and cavities which are obtained from the analysis of a scanning electron microscope (SEM) analysis.
Concrete is a very important composite for making different building structures to absorb different levels of radiation. Nuclear power plants, nuclear research reactors, particle accelerators and linear accelerator in medical institution use concrete in building construction. Nanoparticles or nanocrystals have different properties than their bulk counterparts. The gamma radiation absorption characteristics and beta back scattering by nanoparticles is also different than their counterparts. In this paper, carbon nanoparticles are mixed in the concrete composite during its preparation. The concrete composite with carbon nanoparticles as admixture were analyzed to provide radiation protection. The gamma radiation absorption characteristics and beta back scattering in ordinary and carbon nanoparticles contained concretes have been studied by GM counter. The results show that using carbon nanoparticles as an admixture in the concrete is one of the solutions for gamma ray shielding and beta back scattering. Therefore, it is good to use carbon nanoparticles as admixtures in concrete composites for beta and gamma radiation scattering and absorption respectively.
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