TY - JOUR AU - Bulavin, L. A. AU - Nagornyi, A. V. AU - Petrenko, V. I. AU - Avdeev, M. V. AU - Alm´asy, L. AU - Rosta, L. AU - Aksenov, V. L. PY - 2018/10/11 Y2 - 2024/03/29 TI - Neutron Studies of the Structure of Non-Polar Magnetic Fluids with Surfactant Excess JF - Ukrainian Journal of Physics JA - Ukr. J. Phys. VL - 58 IS - 12 SE - Soft matter DO - 10.15407/ujpe58.12.1143 UR - https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018395 SP - 1143 AB - <p>Non-polar magnetic fluid systems with an excess of surfactants have been studied with the use of the small-angle neutron scattering technique. Two types of highly stable ferrofluids, magnetite/oleic acid/decalin and magnetite/myristic acid/decalin, with a low (of about 1 vol.%) magnetite content and various acid fractions (up to 25 vol.%) are examined. The aggregation of magnetic particles and surfactant molecules is shown not to occur in the indicated concentration range of the acid molecule excess. The experimental results testify to a change of the interaction between the molecules of oleic and myristic acids in the free (non-adsorbed) state, when they are dissolved in magnetic fluids, and in their solutions in decalin without magnetic particles.</p> ER -