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Sum Frequency Generation Vibrational Spectroscopy of Silicone Surfaces & Interfaces

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Silicone Surface Science

Part of the book series: Advances in Silicon Science ((ADSS,volume 4))

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Abstract

While several general reviews of the applications of sum frequency generation vibrational spectroscopy (SFG) appear in the literature, none have focused specifically on the application of SFG to silicones. The unique and somewhat dichotomous surface properties of silicones, and their ever-increasing use in surface and interface-dependent applications such as lubricants, adhesives, micro-fluidic materials, sensors and matrices or scaffolds for nano-composites, calls for increased fundamental understanding that has motivated the use of SFG analysis. This chapter focuses on the combination of this uniquely surface sensitive tool to study applications using PDMS and other silicone-based materials. Because the interpretation of SFG spectra can be quite complex, many of these examples highlight how SFG can be coupled with complementary techniques to provide a more complete understanding of interfacial effects. Lastly, we conclude by providing a summary of strengths, limitations and potential future opportunities for application of SFG and complementary techniques to silicone-based materials.

An erratum to this chapter can be found at http://dx.doi.org/10.1007/978-94-007-3876-8_14

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Notes

  1. 1.

    In Eq. (2.6), and the subsequent expressions that follow, we have assumed that all the vibrational modes, q, belong to a single type of molecular species or moiety. Although this is usually not true, the extension for the case of multiple types of species is trivial. The more general treatment would unnecessarily increase the complexity of the notation.

  2. 2.

    Although Eq. (2.10) is valid only at thermodynamic equilibrium, it can be generalized to accommodate non-equilibrium conditions by substituting for W some inherent value of adhesion G o usually regarded as rate-independent.

  3. 3.

    The increase in cure temperature arises from mild Pt catalyst inhibition due to complexation between the Pt catalyst complex and the electron-rich adjacent vinyl groups of MVS.

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Acknowledgements

The authors would like to acknowledge helpful discussions with Professor Zhan Chen (DA) and support from Dow Corning Corporation (DA) and the National Science Foundation (AD, DA).

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Authors and Affiliations

  1. Dow Corning Corporation, Midland, MI, 48686, USA

    Dongchan Ahn

  2. Department of Polymer Science, The University of Akron, Akron, OH, 44325, USA

    Ali Dhinojwala

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  1. Michigan Molecular Institute, Midland, M, West Saint Andrews Road 1505, Midland, 48640, Michigan, USA

    Michael J. Owen

  2. Michigan Molecular Institute, Midland, M, St. Mary’s Dr. 2806, Midland, 48640, Michigan, USA

    Petar R. Dvornic

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Ahn, D., Dhinojwala, A. (2012). Sum Frequency Generation Vibrational Spectroscopy of Silicone Surfaces & Interfaces. In: Owen, M., Dvornic, P. (eds) Silicone Surface Science. Advances in Silicon Science, vol 4. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-3876-8_2

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