Formation of hybrid micelles between poly(ethylene glycol)-block-poly(4-vinylpyridinium) cations and sulfate anions in an aqueous milieu
作者：Wu, K; Shi, LQ; Zhang, WQ; 等.
關鍵字：micelles
論文來源：期刊
具體來源：SOFT MATTER
發表時間：2005年
pubs.rsc.org/en/content/articlelanding/2005/sm/b512610j
The SO42−-induced micellization of poly(ethylene glycol)-block-poly(4-vinylpyridinium) (PEG-b-P(4-VPH+)) in aqueous solution is studied by dynamic and static light scattering, and transmission electron microscopy. The SO42− anions can act as cross-linkers of the P(4-VPH+) blocks through the electrostatic attraction between 4-VPH+ and SO42− to induce the micellization of PEG-b-P(4-VPH+). The resultant hybrid micelles are spherical and consist of an ion-complex core of P(4-VPH+)/SO42− and a water-soluble PEG corona and present a density gradient between the core and corona and the core has a higher density. The SO42− concentrations can affect the structure of the core–corona hybrid micelles. The low SO42− conentration leads to a loose core while the high SO42− concentration leads to a compact core.