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China Surfactant Detergent & Cosmetics ›› 2021, Vol. 51 ›› Issue (6): 506-512.doi: 10.3969/j.issn.1001-1803.2021.06.006

• Development and application • Previous Articles     Next Articles

Preparation of Pickering emulsion from volcano mud and its pH stability

FANG Zhen-xing(),WANG Xi-ying(),WU Jing,ZENG Ying,PAN Hong,XIE Zhen-hua   

  1. Institute of Natural Resources and Ecology, Heilongjiang Academy of Sciences, Harbin, Heilongjiang 150040, China
  • Received:2020-08-14 Revised:2021-05-26 Online:2021-06-22 Published:2021-06-22
  • Contact: Xi-ying WANG E-mail:290039929@qq.com;124200680@qq.com

Abstract:

Taking Wudalianchi volcano mud particles as emulsifier, olive oil as oil phase and deionized water as water phase, the preparation process of volcano mud Pickering emulsion was optimized by L9(3 4) orthogonal experiment. The particle size, microstructure and Zeta potential of the emulsion were analyzed, and the pH stability was studied. The results show that stable Pickering emulsion could be prepared by high-pressure (80 MPa)homogenization at 40 ℃ according to the formula in which the mass fractions of olive oil, volcano mud particles and deionized water are 20%, 3% and 77%, respectively. The average particle size of the emulsion is (10.516±0.141) μm. Clear, intact and uniform spherical emulsion particles are observed by Cryo-SEM. The average Zeta potential is -55.01 mV. The emulsion exhibits no creaming in the pH range of 4-12, and demulsification has not been observed in the pH range of 1-14. The volcano mud particles are both hydrophilic and lipophilic. The Pickering emulsion with olive oil as oil phase can be stabilized with volcano mud particles without addition of other chemicals, and the emulsion has excellent pH stability.

Key words: Wudalianchi, volcano mud, Pickering emulsion, preparation process, pH stability

CLC Number: 

  • TQ658