Issue 8, 2009

Holographic photopolymers of organic/inorganic hybrid interpenetrating networks for reduced volume shrinkage

Abstract

We demonstrated that holographic photopolymers of organic/inorganic hybrid interpenetrating networks (IPNs) showed both enhanced monomer diffusion and reduced volume shrinkage, simultaneously. Hybrid IPNs were developed from simple in-situ sol-gel reaction: the alkoxysilane of (3-aminopropyl)triethoxysilane (APTES) leads to the formation of inorganic networks, while simultaneously partial introduction of the two amines of APTES into epoxy resins reduced the overall crosslink density of organic networks. In particular, the morphology of hybrid IPNs can be easily controlled by simply adjusting the ratio of APTES to epoxy resins. When the ratio of APTES to oxirane was 7.0 wt %, interpenetrated hard inorganic networks were homogeneously distributed within soft organic networks without aggregation. The present hybrid IPNs were very effective for high performance holographic properties including diffraction efficiency and volume shrinkage. Soft organic networks with low overall crosslink density enabled fast monomer diffusion for photopolymerization, and consequently diffraction efficiency was enhanced. In addition to fast monomer diffusion, locally dispersed inorganic networks dramatically suppressed the volume shrinkage, due to their filler strengthening effect accompanied by an interpenetrating effect. This synergetic effect of hybrid IPNs allows the enhancement of diffraction efficiency without sacrificing volume shrinkage.

Graphical abstract: Holographic photopolymers of organic/inorganic hybrid interpenetrating networks for reduced volume shrinkage

Supplementary files

Article information

Article type
Paper
Submitted
09 Sep 2008
Accepted
19 Nov 2008
First published
06 Jan 2009

J. Mater. Chem., 2009,19, 1105-1114

Holographic photopolymers of organic/inorganic hybrid interpenetrating networks for reduced volume shrinkage

S. Lee, Y. Jeong, Y. Heo, S. I. Kim, Y. Choi and J. Park, J. Mater. Chem., 2009, 19, 1105 DOI: 10.1039/B815743J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements