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Inorganic-Salt-Induced Morphological Transformation of Semicrystalline Micelles of PCL-b-PEO Block Copolymer in Aqueous Solution
HE Wei-na,XU Jun-ting *
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science& Engineering, Zhejiang University, Hangzhou 310027, China
*Correspondence author
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Funding: the Natural Science Foundation of China （No.No.20974099), the Fundamental Research Funds for the Central Universities）
Opened online: 4 October 2012
Accepted by: none
Citation: HE Wei-na,XU Jun-ting.Inorganic-Salt-Induced Morphological Transformation of Semicrystalline Micelles of PCL-b-PEO Block Copolymer in Aqueous Solution[OL]. [ 4 October 2012] http://en.paper.edu.cn/en_releasepaper/content/4490188
 
 
The effect of inorganic salt at concentrations typical of a biological environment on the Micellar morphology of semicrystalline PCL-b-PEO in aqueous solution is investigated. The salt is introduced either by dialysis of a THF solution against an aqueous solution of the salt or by adding it into an aqueous solution containing preformed micelles. The inorganic salt can induce sphere-to-rod or sphere-to-lamella transformations of the PCL-b-PEO micelles in aqueous solution, affected by the length of the PCL block, the method of salt-adding and the concentration of inorganic salts. The inorganic salt induces ''salting-out'' of the PEO block, leading to a decrease in the reduced tethering density of the corona in the micelles.
Keywords:block copolymers; crystallization; inorganic salts; micelles
 
 
 

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