Study on the Pickering emulsions stabilized by SiO2 nanoparticles for enhanced oil recovery

IF 1.6 4区 工程技术 Q3 CHEMISTRY, APPLIED
Liu Yang, Jijiang Ge, Hao Wu, Hongbin Guo, Jingling Shan, Guicai Zhang
{"title":"Study on the Pickering emulsions stabilized by SiO2 nanoparticles for enhanced oil recovery","authors":"Liu Yang, Jijiang Ge, Hao Wu, Hongbin Guo, Jingling Shan, Guicai Zhang","doi":"10.1002/jsde.12794","DOIUrl":null,"url":null,"abstract":"In high‐temperature and high‐salt environments, emulsions stabilized by surfactants are susceptible to instability phenomena, such as droplet coalescence, thereby limiting their utility in tertiary oil recovery. The Pickering emulsions, which are stabilized by solid particles, have been proved to exhibit good stability. This study demonstrated that the nonionic surfactant C16E20 can adsorb onto SiO<jats:sub>2</jats:sub> nanoparticles with an efficiency exceeding 99%, rendering C16E20 suitable for modulating the wettability of SiO<jats:sub>2</jats:sub> nanoparticles. By adjusting the proper surfactant‐to‐nanoparticle ratio, such as 0.1%:1.0%, a hydrophilic–lipophilic equilibrium is obtained, which is beneficial for the preparation of Pickering emulsions. Laser confocal and cryo‐scanning electron microscopy results indicated that SiO<jats:sub>2</jats:sub> nanoparticles in Pickering emulsions were dispersed at the oil–water interface, forming a network structure between the emulsion droplets. Further experiments illustrated that the Pickering emulsions showed excellent stability for at least 180 days at 80°C. Conventional emulsions behave as Newtonian fluids at lower oil‐phase ratios, while Pickering emulsions exhibit non‐Newtonian fluid properties, with their viscosity capable of increasing by over 100 times. Additionally, Pickering emulsions were found to exhibit thixotropy, attributed to the reversible formation and destruction of droplet bridging structures. Overall, Pickering emulsions are regarded as potential agents for Enhanced Oil Recovery in oilfield development.","PeriodicalId":17083,"journal":{"name":"Journal of Surfactants and Detergents","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Surfactants and Detergents","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1002/jsde.12794","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0

Abstract

In high‐temperature and high‐salt environments, emulsions stabilized by surfactants are susceptible to instability phenomena, such as droplet coalescence, thereby limiting their utility in tertiary oil recovery. The Pickering emulsions, which are stabilized by solid particles, have been proved to exhibit good stability. This study demonstrated that the nonionic surfactant C16E20 can adsorb onto SiO2 nanoparticles with an efficiency exceeding 99%, rendering C16E20 suitable for modulating the wettability of SiO2 nanoparticles. By adjusting the proper surfactant‐to‐nanoparticle ratio, such as 0.1%:1.0%, a hydrophilic–lipophilic equilibrium is obtained, which is beneficial for the preparation of Pickering emulsions. Laser confocal and cryo‐scanning electron microscopy results indicated that SiO2 nanoparticles in Pickering emulsions were dispersed at the oil–water interface, forming a network structure between the emulsion droplets. Further experiments illustrated that the Pickering emulsions showed excellent stability for at least 180 days at 80°C. Conventional emulsions behave as Newtonian fluids at lower oil‐phase ratios, while Pickering emulsions exhibit non‐Newtonian fluid properties, with their viscosity capable of increasing by over 100 times. Additionally, Pickering emulsions were found to exhibit thixotropy, attributed to the reversible formation and destruction of droplet bridging structures. Overall, Pickering emulsions are regarded as potential agents for Enhanced Oil Recovery in oilfield development.
利用二氧化硅纳米颗粒稳定的皮克林乳液提高石油采收率的研究
在高温高盐环境中,由表面活性剂稳定的乳液容易出现液滴凝聚等不稳定现象,从而限制了其在三次采油中的应用。事实证明,由固体颗粒稳定的皮克林乳液具有良好的稳定性。本研究证明,非离子表面活性剂 C16E20 可吸附到 SiO2 纳米粒子上,吸附效率超过 99%,因此 C16E20 适用于调节 SiO2 纳米粒子的润湿性。通过调整适当的表面活性剂与纳米颗粒的比例,如 0.1%:1.0%,可获得亲水-亲油平衡,有利于制备皮克林乳液。激光共聚焦和低温扫描电子显微镜结果表明,Pickering 乳液中的 SiO2 纳米粒子分散在油水界面上,在乳液液滴之间形成了网络结构。进一步的实验表明,皮克林乳液在 80°C 温度下至少可保持 180 天,显示出极佳的稳定性。传统乳液在油相比例较低时表现为牛顿流体,而 Pickering 乳液则表现出非牛顿流体特性,其粘度可增加 100 倍以上。此外,研究还发现皮克林乳液具有触变性,这归因于液滴桥接结构的可逆形成和破坏。总之,皮克林乳液被认为是油田开发中潜在的强化采油剂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Journal of Surfactants and Detergents
Journal of Surfactants and Detergents 工程技术-工程:化工
CiteScore
3.80
自引率
6.20%
发文量
68
审稿时长
4 months
期刊介绍: Journal of Surfactants and Detergents, a journal of the American Oil Chemists’ Society (AOCS) publishes scientific contributions in the surfactants and detergents area. This includes the basic and applied science of petrochemical and oleochemical surfactants, the development and performance of surfactants in all applications, as well as the development and manufacture of detergent ingredients and their formulation into finished products.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信