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Citation: TIAN Peng-Fei, LIU Wen-Xia. Effect of Sodium Citrate on Magnesium Aluminum Hydroxide Stabilized Emulsion[J]. Chinese Journal of Applied Chemistry, ;2008, 25(11): 1271-1276. shu

Effect of Sodium Citrate on Magnesium Aluminum Hydroxide Stabilized Emulsion

TIAN Peng-Fei ^, ,
LIU Wen-Xia

1.
MOE Key Lab of Pulp and Paper Engineering, Shandong Institute of Light Industry, Ji'nan 250353

Corresponding author: TIAN Peng-Fei,
Received Date: 10 October 2007
Available Online: 15 January 2008
Fund Project: 国家自然科学基金(20476053) (20476053)山东省自然科学基金(Y2005B17)资助项目 (Y2005B17)

To explore the role of aggregation of solid particles in stabilizing Pickering emulsions,the emulsi-fying effect of positively charged magnesium aluminum hydroxide(MAH) on paraffin/water system,the influence of sodium citrate on the aggregation of MAH as well as on the formation of MAH stabilized paraffin/water emulsion were investigated.The results show that MAH may stabilize paraffin-in-water emulsion when the initial oil-to-water volume ratio was less than 3:1.The stability of the paraffin-in-water emulsion was improved with increasing paraffin volume fraction,which was accompanied by the increase of emulsion viscosity and droplet size.At the level of less than 10%(w/w based on MAH),sodium citrate induced the aggregation of MAH particles forming open aggregates with high viscosity,which improved the stability of MAH stabilized paraffin/water emulsion.However,the viscosity of the paraffin-in-water emulsion was also increased.When denser MAH aggregates were formed by the charge neutralization of citrate,e.g.,the addition level of sodium citrate was larger than 10%,the stability of MAH stabilized paraffin-in-water emulsion was lowered and the emulsion droplet size rapidly increased.
- magnesium aluminum hydroxide(MAH),
- microparticle emulsifying effect,
- paraffin,
- sodium citrate
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