关键词: MD膜驱剂  ,   , 十二烷基硫酸钠 ,    , 临界胶束浓度  ,   ,  沉淀

Abstract: Critical micelle concentration (cmc) of molecular deposition filming flooding agent (MDFFA) and sodium dodecyl sulfate (SDS) mixed systems were determined by conductivity method, and the effect of MDFFA on the precipitating behavior of anionic surfactant and multivalent cation was studied by means of light transmission measurement. The results show that MDFFA can decrease the cmc of SDS, the cmc decreases with the increasing of the concentration of MDFFA. With the increasing of temperature from 25 ℃ to 50 ℃, the cmc of  2 mmol/L MDFFA/SDS mixed system decreased. The cmcof 2 mmol/L MDFFA/SDS decreased with the increasing of concentration of NaCl. The precipitating behavior did not happen when MDFFA and SDS were mixed. MDFFA can restrain the precipitating behavior of anionic surfactant and Ca²⁺. The capability of MDFFA restrain the precipitating behavior is better than NaCl, NaOH and NaHCO₃.

Key words: Molecular deposition filming flooding agent (MDFFA) ,   ,  Sodium dodecyl sulfate (SDS)  ,    , Critical micelle concentration   ,  ,  Precipitate