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以三价铬离子(Cr3+,Cr(Ⅲ))为交联剂制备的黄原酸(XC)凝胶在油田开发过程中具有许多用途,应用RS75型流变仪测定了含有和不含有阳离子表面活性剂C12NBr(十二烷基-氧丙基-β-羟基-三甲基溴化铵)时凝胶体系粘弹性的变化规律.结果表明,XC凝胶体系不符合理想的线性粘弹性模型,储能模量(G’)和耗能模量(G″)在切力较低时变化甚微,切力较高时两者皆降低,但降低的幅度不同,因而G’～τ(应力)和G″～τ曲线出现交点,此交点随C12NBr浓度增大而降低.结合等温线的研究表明,C12NBr能结合到XC分子上,破坏凝胶的网络结构.然而,在一定条件下其复合粘度(η)随频率和切力的变化出现最低值现象的机理还有待进一步探讨.
Xanthate (XC) gels prepared with trivalent chromium ions (Cr3 +, Cr (III)) as crosslinkers have many uses in oilfield development. The use of RS75 rheometers for the determination of XC gels with and without cationic surfaces The results showed that the XC gel system did not fit the ideal linear viscoelastic model, and the viscoelasticity of the gel system was higher than that of the C12NBr (dodecyl-oxypropyl-β-hydroxy-trimethyl ammonium bromide) The storage modulus (G ’) and the energy dissipation modulus (G’ ’) change little when the shear force is low, and both decrease while the shear force is higher, but the amplitude of the decrease is different, so G’ ~ τ ) And G "~ τ curves, the intersection decreases with the increase of C12NBr concentration.Research on the isotherm shows that C12NBr can bind to the XC molecule and destroy the network structure of the gel.However, under certain conditions, its complex The mechanism of the lowest value of viscosity (η) changing with frequency and shear force remains to be further explored.