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Safia Djedri Rachid Issaadi Luc Picton Nadji Moulai-Mostefa 《Journal of Dispersion Science and Technology》2013,34(7):877-882
Surfactant synthesis was realized from Algerian crude oil and petroleum fractions. To predict the composition (wt%) in paraffins, naphtenes, and aromatics, the crude oil and petroleum fractions were first characterized using the n-d-PA empirical method of Robert. The characterization showed a good level in aromatics compounds which give high yield in the sulfonation reaction by oleum. The synthesized surfactants were characterized by spectroscopic techniques (UV, FTIR) and by critical micelle concentration (CMC), Krafft temperature, solubility (in aqueous and in salt solution), molecular weight, and matter actives (%) measurements. The formulation of microemulsion using synthesized surfactant from plat format petroleum fraction showed a Winsor III type system. The effect of salinity demonstrates the existence of an optimal value of NaCl concentration for which the interfacial tension takes the lowered value (10?4 mN/m). Viscosity measurements confirm that the formulated microemulsion has a Newtonian behavior. 相似文献
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Methodology and Computing in Applied Probability - This paper investigate the approximation of invariant distributions for countable space Markov chains using truncations of the transition matrix.... 相似文献
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Fettaka M Issaadi R Moulai-Mostefa N Dez I Le Cerf D Picton L 《Journal of colloid and interface science》2011,357(2):372-378
Thermal behaviors of thermo sensitive hydroxypropyl cellulose (HPC), methyl cellulose (MC) and methyl hydroxypropyl cellulose (MHPC) solutions have been investigated in dilute regime of concentration (C相似文献
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