The partial support of this research under NASA grant NAG3-2472 is gratefully acknowledged.
Mesocellular Silica Foam as an Epoxy Polymer Reinforcing Agent†
Article first published online: 17 AUG 2007
Copyright © 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Functional Materials
Volume 17, Issue 15, pages 2835–2841, October, 2007
How to Cite
Park, I. and Pinnavaia, T. J. (2007), Mesocellular Silica Foam as an Epoxy Polymer Reinforcing Agent. Adv. Funct. Mater., 17: 2835–2841. doi: 10.1002/adfm.200700063
- Issue published online: 11 OCT 2007
- Article first published online: 17 AUG 2007
- Manuscript Revised: 26 MAR 2007
- Manuscript Received: 15 JAN 2007
- NASA. Grant Number: NAG3-2472
- Mechanical properties;
- Mesoporous materials;
A new type of mechanically improved rubbery epoxy composite is demonstrated based on the use of a mesocellular silica foam, denoted MSU-F, as the reinforcement agent. The silica exhibits a surface area of 540 m2 g–1, a cell size of 26.5 nm (14.9 nm window size) and a pore volume of 2.2 cm3 g–1. Most notably, the silica foam particles readily disperse in the epoxy matrix without the need for an organic surface modifier or dispersing agent. Relative to the pristine polymer, the tensile modulus, strength, strain-at-break, and toughness for the mesocomposites are systematically enhanced at relatively low silica loading over the range 1–9 wt %. Moreover, all of these benefits are realized without a sacrifice in thermal stability or optical transparency of the polymer. The results demonstrate that silica in mesocellular foam form can provide polymer reinforcement far beyond the level realized for non-porous silica or silica with small mesopores at the same weight loading.