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Citation: Zhang Xiao-Hong, Fan Yu, Wu Shi-Kang. Effect of Sodium Dodecyl Sulfate on the Behavior of PEO-PPO-PEO Triblock Copolymer in Aqueous Solution[J]. Acta Physico-Chimica Sinica, ;1999, 15(05): 390-397. doi: 10.3866/PKU.WHXB19990502 shu

Effect of Sodium Dodecyl Sulfate on the Behavior of PEO-PPO-PEO Triblock Copolymer in Aqueous Solution

1.
Institute of Photographic Chemistry,Chinese Academy of Sciences,Beijing 100101

Received Date: 20 July 1998
Available Online: 15 May 1999

The effect of the addition of sodium dodecyl sulfate (SDS ) upon the behavior of the F127 triblock copolymer solution has been studied in this work. The Process of F127 micelle formation in the copolymer solution with different concentration of SDS was monitored by fluorescence probe method. The gelation process of concentrated copolymer solution with different concentration of SDS was also measured. The results indicated that with increasing of SDS concentration in F127 solution, the process of micelle formation was inhibited and the structure formed became looser than that with no SDS added. For the concentrated solution of F127, if the molar ratio of SDS/F127 was less than 2 the system was gellable easily. But if the molar ratio was more than 2, the gelation process of solution was difficult to realize and it was impossible to form gel when the molar ratio was bigger than 5.
- PEO-PPO-PEO triblock copolymer,
- Sodium dodecyl sulfate(SDS),
- Micelle,
- Gelation
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