A Compositional Window of Kinetic Stability for Amphiphilic Polymers and Colloidal Nanorods

作者：Jeng Esther S; Shih Chih Jen; Barone Paul W; Jones Naomi; Baik Joon Hyun; Abrahamson Joel T; Strano Michael S^*

来源：Journal of Physical Chemistry C, 2011, 115(15): 7164-7170.

DOI：10.1021/jp109032h

Amphiphilic polymers are often used to disperse nanoparticles in aqueous solution. Polymer adsorption theory predicts that there exists a narrow compositional range of hydrophobic groups on the polymer chain that allows for kinetic stabilization. Too few groups limit polymer adsorption while too many allow aggregation of polymer-coated nanoparticles for lack of entropic repulsion. we experimentally validate and mathematically describe the existence of this compositional range, and the resulting stability window for the first time using a phenoxy-dextran polymer to disperse single-walled carbon nanotubes. The results should provide a theoretical basis for the design of nanoparticle dispersants.

• 出版日期2011-4-21