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Nanocomposite characterization on multiple length scales using µSAXS.

Ruipeng Li¹, Sterling Cornaby, Marleen Kamperman

¹Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY 14853, USA.

Journal of Synchrotron Radiation

|August 25, 2011

Summary

This study demonstrates how scanning microbeam small-angle X-ray scattering (µSAXS) can assess homogeneity in nanocomposites. It reveals microphase separation in thermoset resol/poly(isoprene-block-ethylene oxide) materials.

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Area of Science:

Materials Science
Polymer Science
Nanotechnology

Background:

Nanocomposites offer tailored material properties through rational synthesis.
Templating nanostructures onto functional materials is challenging, often leading to inhomogeneity and phase separation.
Characterizing nanocomposite microstructure is crucial for understanding material performance.

Purpose of the Study:

To investigate the homogeneity and microphase separation of a thermoset resol/poly(isoprene-block-ethylene oxide) nanocomposite.
To demonstrate the utility of scanning microbeam small-angle X-ray scattering (µSAXS) for multi-length scale characterization.
To provide insights into the templating process challenges in nanocomposite fabrication.

Main Methods:

Utilizing scanning microbeam small-angle X-ray scattering (µSAXS).

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Analyzing a thermoset resol/poly(isoprene-block-ethylene oxide) nanocomposite.

Characterizing material homogeneity and microphase separation across multiple length scales.

Main Results:

Scanning microbeam small-angle X-ray scattering (µSAXS) successfully characterized the nanocomposite.
Evidence of inhomogeneity and microphase separation was observed within the nanocomposite material.
The technique provided detailed microstructural information on multiple length scales.

Conclusions:

Scanning microbeam small-angle X-ray scattering (µSAXS) is an effective tool for evaluating nanocomposite homogeneity.
The study highlights the challenges in achieving uniform nanostructure transfer during nanocomposite synthesis.
Understanding microphase separation is key to optimizing nanocomposite design and fabrication.