杰纳斯
皮克林乳液
乳状液
材料科学
化学工程
接触角
两亲性
提高采收率
热重分析
纳米颗粒
相位反转
傅里叶变换红外光谱
纳米技术
化学
复合材料
共聚物
聚合物
膜
工程类
生物化学
作者
Han Jia,Jiajun Dai,Lingchun Miao,Xin Wei,Hongtao Tang,P. M. Huang,Haidong Jia,Juan He,Kaihe Lv,Dexin Liu
标识
DOI:10.1016/j.colsurfa.2021.126658
摘要
The Janus nanoparticles stabilized Pickering emulsions showed great application potential in various fields, including enhanced oil recovery (EOR). In this study, the amphiphilic Janus-SiO2 nanoparticles (Janus-C12) are successfully synthesized by the Pickering emulsion method and characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), ζ-potential and contact angle measurements. The phase inversion from oil-in-water (O/W), multiple oil-in-water-oil (O/W/O) emulsion, to water-in-oil (W/O) emulsions was observed with the delicate control for the modification degrees of Janus-C12. The possible emulsification mechanisms for various Janus-C12 stabilized emulsions were proposed. The multiple O/W/O emulsion stability in harsh conditions and the influence factors (nanoparticles concentration, water/oil volume ratio and NaCl concentration) were studied systematically. Moreover, the Janus-C12–79% stabilized multiple O/W/O Pickering emulsions exhibited excellent EOR performance (additional oil recovery of 27.2%) in core flooding tests, and the possible EOR mechanism was explored via microscopic visualization experiments.
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