Core-Shell-Corona Micelles by PS-b-P2VP-b-PEO Copolymers: Focus on the Water-Induced Micellization Process

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• 作者：Nicolas Willet ; Jean-Franç ; ois Gohy ; Loï ; c Auvray ; Sunil Varshney ; Robert J&eacute ; rô ; me ; Bernard Leyh
• 刊名：Langmuir
• 出版年：2008
• 出版时间：April 1, 2008
• 年：2008
• 卷：24
• 期：7
• 页码：3009 - 3015
• 全文大小：395K
• 年卷期：v.24,no.7(April 1, 2008)
• ISSN：1520-5827

文摘

It is now well established that amphiphilic PS-b-P2VP-b-PEO linear triblock copolymers can form multilayeredassemblies, thus core-shell-corona (CSC) micelles, in water. Micellization is triggered by addition of a small amountof water into a dilute solution of the PS-b-P2VP-b-PEO copolymer in a non-selective organic solvent. However, thephenomena that take place at the very beginning of this process are poorly documented. How these copolymer chainsare perturbed by addition of water was investigated in this work by light and neutron scattering techniques andtransmission electron microscopy. It was accordingly possible to determine the critical water concentration (CWC),the compactness of the nano-objects in solution, their number of aggregation, and their hydrodynamic diameter ateach step of the micellization process.