TEEMD分子膜驱油剂的合成及性能

Preparation and Properties of a Molecular Deposition Filming Flooding Agent TEEMD

首先采用乙醇胺与环氧氯丙烷在无水乙醇溶剂中反应合成双氯中间体,再加入三乙胺进行季铵化反应合成了双季铵盐膜驱剂(TEEMD);分别测定了TEEMD的阳离子度、TEEME溶液的黏度和电导率、TEEMD的油水分配比、以及TEEMD溶液在不同润湿性介质表面的接触角。研究结果表明,分子膜驱剂TEEMD的阳离子度为82.1%;不同浓度TEEMD溶液的相对黏度均为0.98;TEEMD在水溶液中完全离解成离子,电导率随浓度的增加而增大;但随着TEEMD浓度的增大,它在水溶液中没有形成"胶束"态;TEEMD在原油和水两相间的油-水分配比随着时间延长和浓度增大而逐渐增大,最后达到分配平衡,当TEEMD浓度分别为0.335、0.446、0.558和0.669mmol/L时,油-水分配比系数依次为0.050、0.099、0.552、0.698;接触角测定结果表明,随着浓度的增加,TEEMD在不同固体表面的润湿性均有所增强;该膜驱剂TEEMD能够使不同载玻片的表面向亲水性转变。

The intermediate was prepared through reaction between ethanolamine and epichlorohydin in ethanol solvent; the molecular deposition film, named as TEEMD, was obtained through quaterisation reaction between the intermediate and triethylamine. The cationic degree of TEEMD, the relative viscosity and conductivity of the TEEMD solution, oil-water partition coefficient of the TEEMD and the contact angle of the TEEMD solution on different surfaces were determined. The results showed that cationic degree of the TEEMD calculated by titration was 82.1%. The relative viscosity measured at different concentrations was of 0.98, which didn＇t change with the addition of TEEMD. The measurements of conductivity of the TEEMD solutions at different concentrations indicated that TEEMD completely dissociate into ions in aqueous solution, the conductivity increased with the increase of TEEMD. With the increase of TEEMD concentration, the aqueous solution did not form ＂micelles＂ state. In the two phases of crude oil and water, the oil-water partition coefficient increased with the time prolonged and concentrations increased gradually, finally reached distribution equilibrium. When the TEEMD concentrations were 0.335, 0.446, 0.558, 0.669 mmol/L, respectively, the oil-water partition coefficient were 0.050, 0.099, 0.552, 0.698, respectively. Measurements of contact angle on different solid surfaces showed that the surface wettability enhanced with the increase of the TEEMD concentration.