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When the surfactant synergism is used in Micelle-
enhancedultrafiltration, the rejection ratio of goal solute is
affected by micelle size and it*s mixed molecular interaction
very much. In this work using batch ultrafiltration method to
proceed experiment. The experiment selects cationic surfactant
(CPC),anionic surfactant (SDS) , and nonionic surfactant (Triton
X-100). The part in micelle size measurement uses
ultrafiltration membranes with 3000, 5000, 10000, 30000, and
100000 MWCO to proceed. After concentration of solution and
retentate solution through related theory model measure, getting
the distribution of micelle size and average aggregation number
. The result shows that batch ultrafiltration method appears
clear concentration polarization effects making CPC in high
concentration and 30000 MWCO membrane size have a presieving
effect. Besides, when the CPC concentration(1mM~100mM)
increases, CPC micelle aggregation number will grow and finally
reach a constant number. However, SDS micelle aggregation number
keeps in 60 and can not change with SDS concentration(10mM~100
mM). Triton X-100 micelle aggregation number can also grow with
Triton X-100 concentration(1mM~10mM). The result which SDS/
Triton X-100 and CPC/ Triton X-100 mixed surfactant systems
shows their behavior are dominated by Triton X-100. However, in
the application of synergism of mixed surfactants in micellar-
enhanced ultrafiltration, we can know rejection ratio of p-
xylene will be better when mixed ratio of Triton X-100 is
higher. In p-xylene rejective experiment results show that SDS/
CPC mixed surfactant systems have synergistic effect.
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