新型磺基甜菜碱/聚丙烯酰胺体系表面及界面性能

doi:10.3724/SP.J.1095.2013.20605

摘要/Abstract

摘要： 采用自制的新型磺基甜菜碱两性表面活性剂与相对分子质量2500万的聚丙烯酰胺进行复配，考察了不同温度和矿化度条件下，聚合物对复配溶液表面、界面性能的影响。采用滴体积法测定了溶液的表面张力，结果表明，加入聚合物使溶液的临界胶束浓度增大，且复配溶液的表面张力大于单独表面活性剂溶液的表面张力。当聚合物浓度一定，增大溶液矿化度时，体系表面张力增大。用旋滴型界面张力仪测定了溶液的界面张力，结果表明，增大聚合物浓度，油水界面张力增大，增大溶液矿化度，油水界面张力有所升高。聚合物质量浓度为1.5 g/L，表面活性剂质量浓度为0.3 g/L时，可使胜利油田孤岛原油和孤东原油的油水界面张力达到超低数量级（10-3 mN/m）。用分水时间法测定了溶液的乳化性能，结果表明,聚合物浓度增大，分水时间延长，并考察了75、85和95 ℃条件下体系的乳化性能，温度越高，分水时间越短。

关键词: 表面活性剂聚丙烯酰胺, 聚合物, 表面张力, 表面张力, 乳化性能

Abstract: In this paper, we prepared a polymeric composite from a new self-repared sulfobetaine amphoteric surfactant and a polyacrylamide with 25 million relative molecular mass, and investigated the effect of the as-prepared polymeric composite on its surface performance and interfacial performance. Dropping volume method was used to determine the surface tension of the solution. The results show that the critical micelle concentration increases by adding polyacrylamide and the surface tension of the solution is greater than that of the single surfactant solution. Furthermore, the surface tension of the system increases significantly with the increase of salinity. The spinning drop interfacial tension was determined. It is shown that the water/crude oil interfacial tension increases with the increase of polymer concentration but increases indistinctively with the increase of salinity. When the polymer concentration is 1.5 g/L and the surfactant concentration is 0.3 g/L, water/crude oil interfacial tension of Gudao crude oil and Gudong crude oil from Shengli oil field achieves ultra low magnitude at 10-3 mN/m. Finally, we come to determine the emulsifying performance by diversion time method. The results show that the diversion time extends with the increase of polymer concentration. And we also investigated emulsifying property at 75 ℃, 85 ℃, 95 ℃, respectively. It is found that diversion time shortened with the increase of temperature.

Key words: surfactant, polyacrylamide, composite, surface tension, interfacial tension, emulsifying performance

中图分类号:

O647

丁伟, 李金红, 于涛, 邢欣欣, 张微, 杨柳. 新型磺基甜菜碱/聚丙烯酰胺体系表面及界面性能[J]. 应用化学, DOI: 10.3724/SP.J.1095.2013.20605.

DING Wei*, LI Jinhong, YU Tao, XING Xinxin, ZHANG Wei, YANG Liu. Surface/Interface Performance of New Sulfobetaine/Polyacrylamide System[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2013.20605.

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