(Perfluorosulfonate Ionomer)-(Inorganic Oxide) Nanocomposites - Organic Modification of Surfaces of Silicon-Oxide Nanoparticles Grown In-Situ

Authors

Q. Deng, University of Southern Mississippi
Kenneth A. Mauritz, University of Southern MississippiFollow
R.B. Moore, University of Southern MississippiFollow

Document Type

Article

Publication Date

1995

Department

Polymers and High Performance Materials

Abstract

SiO_{2[1 - x/4]}(OH)_x nanoparticles were generated via in situ sol-gel reactions for tetraethoxysilane within polar clusters of perfluorosulfonic acid films. Then, residual SiOH groups on these nanoparticles were post-reacted with diethoxydimethylsilane (DEDMS) and ethoxytrimethylsilane (ETMS), resulting in organically-"shelled" and interknitted, and simply organically "shelled" nanoparticles, respectively. FT-IR and ²⁹Si solid state NMR spectroscopies established structural incorporation of the di- and tri-methylsilanes onto silicon oxide "cores" as well as degree of molecular connectivity within the inorganic phase. Post-reaction with DEDMS rendered the structure more linear. Mechanical tensile experiments indicated a ductile → brittle transformation upon DEDMS post-reaction, suggesting linking of silicon oxide nanoparticles. On the other hand, a measure of ductility persisted after ETMS post-reaction. Tensile strength was increased after both post-reaction schemes.

Publication Title

ACS Symposium Series

Volume

585

First Page

66

Last Page

84

Recommended Citation

Deng, Q., Mauritz, K. A., Moore, R. (1995). (Perfluorosulfonate Ionomer)-(Inorganic Oxide) Nanocomposites - Organic Modification of Surfaces of Silicon-Oxide Nanoparticles Grown In-Situ. ACS Symposium Series, 585, 66-84.
Available at: https://aquila.usm.edu/fac_pubs/5769