Hollow polymer spheres synthesized from a vesicle-directed polymerization can be dried and redispersed in water using a variety of nonionic ethoxylated alcohol surfactants as stabilizers. The final dispersions consist of both polymer shells and surfactant micelles, which remain together in colloidal suspension for at least several months. Small-angle neutron scattering (SANS) is used to measure the polymer shell thickness (63 Å) and core radius (560 Å) of the surfactant-stabilized hollow polymer spheres in the presence of surfactant micelles. Characterization by SANS provides information about the surfactant bilayer and polymer shell thicknesses which were previously unattainable.
Bibliographical noteFunding Information:
The authors thank Carlos C. Co for supplying the code used to calculate the partial structure factors. This work was supported by NASA Grant NAG3-1955 and NSF CTS-9814399. We acknowledge the support of the National Institute of Standards and Technology, U.S. Department of Commerce, in providing facilities used in this work.
- Nanostructured particles
- Small-angle neutron scattering