Showing 4 results for Clay Nanoparticles
Volume 2, Issue 2 (9-2018)
Abstract
In recent years, with the advancement of nanoscience, many scientists have used nano materials to solve existing problems in various sectors of oil industry. Nanofluids made with these materials can facilitate the separation of oil and gas in a reservoir and increase oil recovery factor compared to current methods. Therefore, in this work, the effect of clay nanoparticles on oil recovery factor was investigated. For this purpose, two different base fluids, water and ethanol, were used to disperse the nanoparticles. The effect of adding clay nanoparticles on viscosity changes and interfacial surface tension was determined. Also, in order to investigate the effect of nanoparticle concentration in the base fluid on the ultimate oil recovery factor, nanofluids with 3 and 5 wt% were prepared. Results show that oil recovery factor increases significantly in these conditions by adding them into the base fluid, though nanofluids included clay nanoparticles have less stability. Also, the effect of these nanoparticles dispersed in water is greater than in ethanol. For example, at 5 wt%, oil recovery factor for water based nanofluid was 49.7% and for ethanol based nanofluid was 46%.
G. H. Rahimi, Reza Zamani, Mohammad Hossein Pol,
Volume 14, Issue 6 (9-2014)
Abstract
This study examines the reinforcing effect of organically modified layered clay on the structure and mechanical properties of the amine-cured epoxy/clay nanocomposites. The epoxy resin system is made of a diglycidyl ether of bisphenol A, Epon 828, as the epoxy prepolymer and Epikure 3234, namely TETA, as the curing agent. The organically modified clay, Closite 30B, is dispersed into the epoxy system in a 0%, 1.5%, 3% and 5% ratio in weight with respect to the matrix. The state of dispersion was characterized by X-ray diffraction method. The results of XRD show that the clay has been further intercalated by the epoxy matrix. The tensile and flexural properties of the epoxy/clay nanocomposites were investigated according to the standard tests. It is found that the tensile and flexural modulus and flexural Strength of the epoxy/clay nanocomposites increase with adding clay loading into the resin. However, the other mechanical properties such as tensile strength, strain at break and energy to break decrease as the clay nanoparticles is added into the resin. The results also approved that the TETA-cured epoxy resin can be more brittle when the clay nanoparticle is added into the epoxy resin.
Reza Zamani, G. H. Rahimi, Mohammad Hossein Pol,
Volume 14, Issue 10 (1-2015)
Abstract
In this study, the reinforcing effect of organically modified layered clay in two epoxy matrices, TETA-cured and F205-cured, was studied. The epoxy resin system is made of a diglycidyl ether of bisphenol A, Epon 828, as the epoxy prepolymer and the two hardeners were Epikure 3234, namely TETA, and Epikure F205. The organically modified clay, Closite 30B, is dispersed into the epoxy system in a 0%, 1.5%, 3% and 5% ratio in weight with respect to the matrix. The state of dispersion was characterized by X-ray diffraction method. In both systems of epoxy resin, the results of XRD show that the clay has been further intercalated by the epoxy matrix. The tensile and flexural properties of the epoxy/clay nanocomposites were investigated according to the standard tests. The results of mechanical tests indicate that the mechanical behavior of two epoxy resin systems reinforced with clay nanoparticles, are different from each other, so that adding clay into the epoxy matrices makes the TETA-cured nanocomposites more brittle and the others cured with F205 more soften. By comparing the results of two epoxy resin systems reinforced with clay nanoparticles, it is concluded that positive effect of presence of the clay nanoparticles is evident on the mechanical properties of the F205-cured epoxy resin.
S.a. Azimi, V. Momeni, M.h. Alaei , A. Mirzaei, M. Rezvani Nasab, M. Ramezani Nezhad, A.h. Mohamadian,
Volume 20, Issue 3 (2-2020)
Abstract
In this research, the effect of adding clay Nanoparticles on increasing the lifetime of glass/epoxy composites under hydrothermal conditions has been investigated. For this purpose, samples containing 3 Vol.% of clay Nanoparticles and samples without clay Nanoparticles in resin epoxy has been manufactured for the fabrication of specimens of the tensile test using hand lay-up and vacuum bag. The specimens were placed under the hydrothermal condition of 90% humidity and 75 °C temperature for 500 hours in the incubator and were tested for tensile properties. The results show that addition of clay Nanoparticles decreases the strength of the composite by 21.39% in the newly produced samples while in a long time, these particles slow down the process of composite degradation, so that in the same environmental conditions, the strength of specimens containing clay Nanoparticles is 9% higher than the specimens without clay Nanoparticles.
