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51.
Behaviour of Rice-Byproducts and Optimizing the Conditions for Production of High Performance Natural Fiber Polymer Composites 总被引:1,自引:0,他引:1
Houssni El-Saied Altaf H. Basta Mohamed E. Hassanen Hans Korte Amr Helal 《Journal of Polymers and the Environment》2012,20(3):838-847
This present study deals with evaluating some available rice by-products, such as rice straw and rice husks, as a fiber component in manufacturing of high performance natural fiber polymer composites (NFPC). The utilization of these undesirable wastes will contribute to the reduction of the environmental impact of waste disposal by burning. Two matrices (thermoset and thermoplastic) were used. Optimization of manufacture conditions of polyester-based thermosetting polymer composites was carried out through examine the effects of fibers to polymer ratio, amounts of catalyzed and initiator, fraction size of fibers and substituting one fibers by another, as well as time, temperature and pressure of pressing. The possibility of styrene containing polyester solution on improving the fiber interface via in situ grafting and enhancing the strength and water resistance of the produced NFPC was also evaluated, in comparison with that produced from using thermoplastic matrix (polypropylene) in presence of coupling agent. The production of this valuable product (NFPC) by this simple procedure, which not needs special devices (twin extrusion with heater), and chemicals to improve the compatibility between fibers and polymer matrix, will ensure reasonable profits and direct impacts on the Egyptian economy in general and rice growers in particular. 相似文献
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Probability plots of trace element concentrations may be used to partition, or segregate, sample data into its constituent
populations. Two populations are typically present in data from sites requiring remedial action, one representing clean, uncontaminated
soil or sediment (background) and the other representing contaminated ground. The use of such plots in the analysis and evaluation
of environmental data permits a statistical characterization of the background populations, from which defensible cleanup
criteria may be developed. These criteria will be environmentally conservative, yet will minimize the amount of soil removed
in a remedial action. An example is given from a successful cleanup of a surface impoundment. 相似文献
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The fate of Lindan, DDT, Malathion, Monolinuron, Captan and Maneb during smoking process was studied and it was observed that the amount of unchanged pesticides in the mainstream smoke depends on steam volatility of the substances, while the vapor pressures have no significant influence. 相似文献
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Residues of hexachlorobenzene-14C were found in all parts of wheat plants grown from treated seeds or in contaminated soil. Besides the parent compound and bound residues in plants and soil, very small amounts of soluble acidic metabolites were present in plants, which were characterized and determined quantitatively. 相似文献
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