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China Surfactant Detergent & Cosmetics ›› 2016, Vol. 46 ›› Issue (12): 697-702.doi: 10.13218/j.cnki.csdc.2016.12.005

• Developmen and application • Previous Articles     Next Articles

Preparation of liquid paraffin/water Pickering emulsions stabilized by modified montmorillonite with wet ball mill method

YAN Hui-qiong1,CHEN Xiu-qiong1,SONG Huang-wang1,LI Jia-cheng2,WANG Xiang-hui1,LIN Qiang1   

  1. 1.College of Chemistry &Chemical Engineering,Hainan Normal University,Haikou,Hainan 571100,China;
    2.College of Materials &Chemical Engineering,Hainan University,Haikou,Hainan 570228,China
  • Online:2016-12-22 Published:2019-04-18

Abstract: Wet ball mill method was applied to prepare modified montmorillonite (DDA-MMT) by the intercalation of didodecyldimethylammonium bromide (DDAB) with Na-montmorillonite (Na-MMT) as the basic material.Then the resultant DDA-MMT was applied to emulsify liquid paraffin to form O/W Pickering emulsions under the action of ultrasound.The resultant DDA-MMT was characterized by XRD,TEM,FT-IR,contact angle measurement,Zeta potential and laser particle size analyzer.The effects of DDA-MMT mass concentration,pH of aqueous phase and ionic strength on the stability of the Pickering emulsions were also investigated.Experimental results showed that DDAB has successfully intercalated into the interlayer of Na-MMT under the mechanical action of the ball mill,causing the size,Zeta potential and three phase contact angle change from 910.7 nm,-26.8 mV and 121.7° to 603.8 nm,38.3 mV and 86.9° respectively.In comparison with Na-MMT particles,DDA-MMT particles are more easily to aggregate between the oil-water interfaces and displays better emulsification stability.With the increasing of DDA-MMT mass concentration,the particle size of the Pickering emulsions decreases,the volume fraction of the emulsion increases and the stability of the emulsion becomes better.When the pH of aqueous phase is in the range of 6.26~8.36,and the NaCl concentration is 20 mmol/L,the stability of the Pickering emulsion prepared by DDA-MMT is in the best condition.

Key words: Na-montmorillonite, didodecyldimethylammonium bromide, Pickering emulsion, stability

CLC Number: 

  • O648.2+3