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Cationic surfactant-modified palygorskite particles as effective stabilizer for Pickering emulsion gel formation
Abstract Based on the synergistic interaction between palygorskite (PAL) and cetyltrimethylammonium bromide (CTAB), Pickering emulsion gel was successfully prepared in this study in a wide range of oil volume fraction (15–75%). All prepared emulsion gels remained stable for more than 6 months at room temperature. The microstructure, stability, and rheological properties of the prepared emulsion gels were characterized and evaluated. The influence of various environmental factors, including temperature, pH, salinity and types of oil phase on the formation of emulsion gels were investigated. A series of characterization methods were used to investigate the formation and stabilization mechanism of Pickering emulsion gel. The reduction of interfacial tension between oil and water, the changed surface characteristics of PAL, and the formation of a three-dimensional network structure in the continuous phase contributed to the stabilization of Pickering emulsion gel. This work presents a new strategy for the preparation of Pickering emulsion gel by using easily obtained clay particles.
Graphical abstract Display Omitted
Highlights Pickering emulsion gel was successfully prepared by surfactant-modified palygorskite. Stable emulsion gels were obtained in a wide range of oil volume fraction. Formation and stabilization mechanism of emulsion gel is proposed. Stable Pickering emulsion gel can be formed even at high NaCl concentration. PAL clay particles can be applied to most oil-water mixtures to form stable gels.
Cationic surfactant-modified palygorskite particles as effective stabilizer for Pickering emulsion gel formation
Abstract Based on the synergistic interaction between palygorskite (PAL) and cetyltrimethylammonium bromide (CTAB), Pickering emulsion gel was successfully prepared in this study in a wide range of oil volume fraction (15–75%). All prepared emulsion gels remained stable for more than 6 months at room temperature. The microstructure, stability, and rheological properties of the prepared emulsion gels were characterized and evaluated. The influence of various environmental factors, including temperature, pH, salinity and types of oil phase on the formation of emulsion gels were investigated. A series of characterization methods were used to investigate the formation and stabilization mechanism of Pickering emulsion gel. The reduction of interfacial tension between oil and water, the changed surface characteristics of PAL, and the formation of a three-dimensional network structure in the continuous phase contributed to the stabilization of Pickering emulsion gel. This work presents a new strategy for the preparation of Pickering emulsion gel by using easily obtained clay particles.
Graphical abstract Display Omitted
Highlights Pickering emulsion gel was successfully prepared by surfactant-modified palygorskite. Stable emulsion gels were obtained in a wide range of oil volume fraction. Formation and stabilization mechanism of emulsion gel is proposed. Stable Pickering emulsion gel can be formed even at high NaCl concentration. PAL clay particles can be applied to most oil-water mixtures to form stable gels.
Cationic surfactant-modified palygorskite particles as effective stabilizer for Pickering emulsion gel formation
Wang, Shuangjia (author) / Shen, Yun (author) / Chen, Xiuping (author) / Dong, Limei (author) / Yu, Hong (author) / Bao, Mutai (author) / Li, Yiming (author)
Applied Clay Science ; 219
2022-01-29
Article (Journal)
Electronic Resource
English
A pH responsive Pickering emulsion stabilized by fibrous palygorskite particles
| Online Contents | 2014