water-in-oil emulsion;
emulsion stability;
interfacial dilatational rheology;
oscillating pendant drop tensiometer;
gel;
asphaltenes;
resins;
D O I:
10.1016/j.jcis.2005.10.069
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
The dilational viscoelasticity behaviors of water/oil interfaces formed with a crude oil and its distilled fractions diluted in cyclohexane were investigated by means of an oscillating drop tensiometer. The rheological study of the w/o interfaces at different frequencies has shown that the stable w/o emulsions systematically correspond to interfaces which present the rheological characteristics of a 2D gel near its gelation point. The stability of emulsions was found to increase with both the gel strength and the glass transition temperature of the gel. As expected, the indigenous natural surfactants responsible for the formation of the interfacial critical gel have been identified as the heaviest amphiphilic components present in the crude oil, i.e., asphaltenes and resins. Nevertheless, we have shown that such a gel can also form in the absence of asphaltene in the oil phase. (c) 2005 Elsevier Inc. All rights reserved.
机构:
Southwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R ChinaSouthwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
Tao, Jun
Shi, Peng
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机构:
Southwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
Southwest Petr Univ, Oil & Gas Field Appl Chem Key Lab Sichuan Prov, Chengdu 610500, Sichuan, Peoples R ChinaSouthwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
Shi, Peng
Fang, Shenwen
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Southwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
Southwest Petr Univ, Oil & Gas Field Appl Chem Key Lab Sichuan Prov, Chengdu 610500, Sichuan, Peoples R ChinaSouthwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
Fang, Shenwen
Li, Keyi
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Southwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R ChinaSouthwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
Li, Keyi
Zhang, Heng
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Southwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R ChinaSouthwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
Zhang, Heng
Duan, Ming
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机构:
Southwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
Southwest Petr Univ, Oil & Gas Field Appl Chem Key Lab Sichuan Prov, Chengdu 610500, Sichuan, Peoples R ChinaSouthwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China
机构:
Guangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R China
South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R ChinaGuangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R China
Peng, Yan
Zhang, Xiangyu
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机构:
China Natl Petr Corp Liaohe Oilfield, Res Inst, Panjin 124010, Peoples R ChinaGuangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R China
Zhang, Xiangyu
Cheng, Lihua
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Guangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R ChinaGuangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R China
Cheng, Lihua
Zhang, Hong
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机构:
China Natl Petr Corp Liaohe Oilfield, Res Inst, Panjin 124010, Peoples R ChinaGuangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R China
Zhang, Hong
Tang, Jieyun
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机构:
China Natl Petr Corp Liaohe Oilfield, Res Inst, Panjin 124010, Peoples R ChinaGuangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R China
Tang, Jieyun
Chen, Hong
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机构:
Guangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R ChinaGuangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R China
Chen, Hong
Fan, Qinzhen
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机构:
Guangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R ChinaGuangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R China
Fan, Qinzhen
Ouyang, Xinping
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机构:
South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R ChinaGuangdong Univ Petrochem Technol, Sch Chem Engn, Maoming 525000, Peoples R China