支状嵌段聚醚的界面聚集行为及对原油乳状液的破乳作用

引用本文: 翟雪如, 刘腾, 徐桂英, 檀国荣, 吕鑫, 张健. 支状嵌段聚醚的界面聚集行为及对原油乳状液的破乳作用[J]. 物理化学学报, 2013, 29(06): 1253-1259. doi: 10.3866/PKU.WHXB201303251 shu

Citation: ZHAI Xue-Ru, LIU Teng, XU Gui-Ying, TAN Guo-Rong, Lü Xin, ZHANG Jian. Aggregation Behavior of Branched Block Polyethers at Interface and Their Demulsification for Crude Oil Emulsion[J]. Acta Physico-Chimica Sinica, 2013, 29(06): 1253-1259. doi: 10.3866/PKU.WHXB201303251 shu

支状嵌段聚醚的界面聚集行为及对原油乳状液的破乳作用

翟雪如 ^1, ,
刘腾 ^1, ,
徐桂英 ^1, ,
檀国荣 ^2, ,
吕鑫 ^2, ,
张健 ^2,

基金项目:
国家科技重大专项基金(2011ZX05024-004-08)资助 (2011ZX05024-004-08)

摘要:

合成了三种不同聚氧丙烯/聚氧乙烯(PPO/PEO)比例的含苯环支状嵌段聚醚, 通过界面张力、界面流变、表面压以及对原油乳状液的破乳脱水效果的测定, 考察了其界面聚集行为和破乳作用对PEO含量和分子量的依赖性, 并且对比研究了三种支状聚醚分子交联前后的破乳性能. 结果表明, PEO含量高且分子量大者,其单分子界面占据面积大, 在油/水界面达到吸附平衡的时间短, 其油/水界面扩张模量及扩张弹性均高于PEO含量较少者. 但是对原油乳状液的破乳脱水效果则是PEO含量居中的聚醚最好. 温度影响和交联与否的研究表明, 交联并不能提高分子量较大的聚醚对原油乳状液的破乳效果, 温度对聚醚分子交联前后的破乳效果有不同的影响规律. 本研究可为原油集输过程中化学品的选择与应用提供一定的依据.

关键词:

English

Aggregation Behavior of Branched Block Polyethers at Interface and Their Demulsification for Crude Oil Emulsion

1.
1 Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, P. R. China;
2 Technology Research Dept. CNOOC Research Center, State Key Laboratory of Offshore Oil Exploitation, Beijing 100027, P. R. China
Received Date: 29 January 2013
Available Online: 17 May 2013
Fund Project:
国家科技重大专项基金(2011ZX05024-004-08)资助

Abstract:

Three poly(propylene oxide)-poly(ethylene oxide) branched block polyethers containing a benzene ring moiety were synthesized, with different molecular weights and propylene oxide/ethylene oxide (PPO/PEO) compositions. Their aggregation behaviors at air/water and oil/water interfaces were investigated by interfacial tension, surface pressure and interfacial dilational rheology methods. Aggregation and the emulsion breaking properties (demulsification) for crude oil were studied based on the polymer PEO content and molecular weight. The demulsification performance of these polyethers and their crosslinked counterparts were compared at different temperatures. The results showed that a polyether with a higher proportion of PEO groups and larger molecular weight occupied a larger area at the air/water interface, reached equilibrium faster, and featured a larger dilational modulus at the oil/water interface. However, the demulsification experiments showed that the polyether with a moderate level of PEO content gave better performance. The cross linking method did not improve demulsification ability in the polyether with large molecular weights. Temperature was also found to have no explicit influence on the demulsification of the cross linked polyethers. This study provides useful data for the selection and application of chemicals used in processing of crude oil.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

支状嵌段聚醚的界面聚集行为及对原油乳状液的破乳作用

English

Aggregation Behavior of Branched Block Polyethers at Interface and Their Demulsification for Crude Oil Emulsion

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

支状嵌段聚醚的界面聚集行为及对原油乳状液的破乳作用

English

Aggregation Behavior of Branched Block Polyethers at Interface and Their Demulsification for Crude Oil Emulsion

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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