含氢硅油改性聚醚破乳剂的表界面性能研究

Research on surface and interface performance of hydrosilicone oil modified polyether demulsifiers

将聚醚破乳剂SP169、AP201和AE1910进行硅油改性获得改性破乳剂SISP、SIAP和SIAE,并通过红外光谱进行了结构表征。测定了上述破乳剂的表面参数cmc、γ_(cmc)、Γ_(max)、A_(min),结果显示改性后的破乳剂表面张力更低。动态油/水界面张力研究结果显示,多支化的SIAP和SIAE其降低油/水界面张力的能力更强。通过不同破乳剂的油/水界面黏弹性研究,得到了破乳剂油/水界面扩张弹性(εd)和扩张黏性(ωηd)随着扩张频率(ω)变化的曲线,结果表明聚醚改性主要影响了破乳剂油/水界面黏性模量的变化。研究了破乳剂对原油乳状液的破乳性能,SP169和AP201改性后破乳剂SISP和SIAP性能提升最明显。

The polyether demulsifiers SP169,AP201 and AE1910,were modified with hydrosilicone oil to obtain modified demulsifiers SISP,SIAP and SIAE,which were characterized by FT-IR spectroscopy.The surface parameters such as cmc,γ_(cmc),Γ_(max),A_(min) of the demulsifiers were measured.The results showed that the modification improved the ability of the demulsifiers to reduce the surface tension of the solvent.However,the results of dynamic oil-water interfacial tension showed that the multi-branched SIAP and SIAE had higher ability to reduce the oil-water interfacial tension.Meanwhile,the curves of dilatational elasticity(εd)and dilatational viscosity(ωηd)of demulsifiers at oil-water interface with the variation of dilatational frequency(ω)were obtained by studying the viscoelasticity of the oil-water interface for different demulsifiers.It showed that the modification of polyethers mainly caused the change of the viscous modulus at oil-water interface for the demulsifiers.The demulsification performance of demulsifiers for crude oil emulsions was studied,and the performance of SISP and SIAP which were demulsifiers modified from SP169 and AP201 had been improved maximally.