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Modifying the Pore Size of Resorcinol Formaldehyde Aerogels for Fabrication of Hollow Spheres for Direct Drive ICF Experiments

Published online by Cambridge University Press:  01 February 2011

Reny Paguio ,
Chris A. Federick ,
Jan Ilavsky ,
Jared F. Hund ,
Abbas Nikroo  and
Mary A. Thi
Reny Paguio
Affiliation:
paguior@fusion.gat.com, General Atomics, California, United States
Chris A. Federick
Affiliation:
frederick@fusion.gat.com, General Atomics, San Diego, California, United States
Jan Ilavsky
Affiliation:
ilavsky@aps.anl.gov, Argonne National Laboratory, Argonne, Illinois, United States
Jared F. Hund
Affiliation:
hund@fusion.gat.com, General Atomics, San Diego, California, United States
Abbas Nikroo
Affiliation:
nikroo@fusion.gat.com, General Atomics, San Diego, California, United States
Mary A. Thi
Affiliation:
mary.thi@gat.com, General Atomics, San Diego, California, United States
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Abstract

This work investigates an alternative way to modify the pore size of a 100 mg/cc resorcinol formaldehyde (R/F) aerogel without any significant change to the aerogel target density. This was successfully accomplished by an addition of hydrophilic polymer additive [Poly Vinyl Alcohol (PVA) or Poly Acrylic Acid (PAA)] to the R/F precursor solution which acts as an impurity in the reaction. The polymer can modify the cross linking or aggregation of the primary particles which can change the structure formation of the aerogel, thus changing the pore size. This paper will discuss this process modification and the fabrication of hollow, large pore R/F aerogel spheres that are used for direct drive inertial confinement fusion (ICF) cryogenic ice layering experiments at the University of Rochester Laboratory for Laser Energetics (LLE). The aerogels were characterized using scanning electron microscopy (SEM), nitrogen gas adsorption, and ultra small angle x-ray scattering (USAXS).

Keywords

aerogelchemical reactionsol-gel
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1147: Symposium OO – Grazing-Incidence Small-Angle X-Ray Scattering , 2008 , 1147-OO04-05
Copyright
Copyright © Materials Research Society 2009

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References

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