Skip to main content Accessibility help
×
Home

Resorcinol-Formaldehyde and Carbon Aerogel Microspheres

  • C. T. Alviso (a1), R. W. Pekala (a1), J. Gross (a1), X. Lu (a2), R. Caps (a2) and J. Fricke (a2)...

Abstract

Aerogels are a unique class of materials possessing an open-cell structure with ultrafine cells/pores (<100nm), high surface area (400–1100 m2/g), and a solid matrix composed of interconnected particles, fibers, or platelets with characteristic dimensions of 10nm. Although monolithic aerogels are ideal candidates for many applications (e.g. transparent window insulation), current processing methods have limited their introduction into the commercial marketplace. Our research focuses on the formation of resorcinol-formaldehyde (RF) aerogel microspheres which offer an attractive alternative to monolith production. An inverse emulsion polymerization is used to produce these spherical gel particles which undergo solvent exchange followed by supercritical drying with carbon dioxide. This process yields aerogel microspheres (10–80μ diameter) which can be used as loosely packed powders, compression molded into nearnet shapes using a polymer binder, or used as additives in conventional foaming operations to produce new aerogel composites with superior thermal properties. The emulsification procedure, thermal characterization, mechanical properties, and potential applications of RF aerogel microspheres will be discussed.

Copyright

References

Hide All
[1] Pekala, R. W. and Alviso, C. T., Mater. Res. Soc. Symp. Proc., 180, 791 (1990).
[2] Pekala, R. W., J. Mater. Sci., 24, 3221 (1989).
[3] Pekala, R. W. and Kong, F. M., J. Phys. Coil. Suppl., 50(4), C433 (1989).
[4] Pekala, R. W. and Kong, F. M., Polym. Prpts., 30(1), 221 (1989).
[5] Pekala, R. W. and Alviso, C. T., in Novel Forms of Carbon, Renschler, C. L., Pouch, J. J., and Cox, D. M., eds., MRS Symp. Proc. 270, 3 (1992).
[6] Pekala, R. W., Alviso, C. T., and LeMay, J. D., in Chemical Processing of Advanced Materials, Hench, L. L. and West, J. K., eds., (New York: John Wiley & Sons, Inc., 1992), pp. 671683.
[7] Pekala, R. W., Alviso, C. T., Kong, F. M., and Hrubesh, L. W., Organic Aerogel Microspheres, C&MS Annual Report
[8] Pekala, R. W., Alviso, C. T., Lu, X., Caps, R., and Fricke, J., Am. Chem. Soc. Proc., (1995).
[9] Lu, X., Arduini-Schuster, M. C., Kuhn, J., Nilsson, O., Fricke, J., and Pekala, R. W., “Thermal Conductivity of Monolithic Organic Aerogels,” Science, 255, 971 (1992).
[10] Nilsson, O., Ruschenpohler, G., Gross, J., and Fricke, J., High Temp.-High Pressures,21, 267 (1989).

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed