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Title: Preparation of hydrophobic organic aeorgels

Abstract

Synthetic methods for the preparation of hydrophobic organics aerogels. One method involves the sol-gel polymerization of 1,3-dimethoxybenzene or 1,3,5-trimethoxybenzene with formaldehyde in non-aqueous solvents. Using a procedure analogous to the preparation of resorcinol-formaldehyde (RF) aerogels, this approach generates wet gels that can be dried using either supercritical solvent extraction to generate the new organic aerogels or air dried to produce an xerogel. Other methods involve the sol-gel polymerization of 1,3,5 trihydroxy benzene (phloroglucinol) or 1,3 dihydroxy benzene (resorcinol) and various aldehydes in non-aqueous solvents. These methods use a procedure analogous to the one-step base and two-step base/acid catalyzed polycondensation of phloroglucinol and formaldehyde, but the base catalyst used is triethylamine. These methods can be applied to a variety of other sol-gel precursors and solvent systems. These hydrophobic organics aerogels have numerous application potentials in the field of material absorbers and water-proof insulation.

Inventors:
; ;
Publication Date:
Research Org.:
Univ. of California, Oakland, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175087
Patent Number(s):
6,806,299
Application Number:
10/132,893
Assignee:
The Regents of the University of California (Oakland, CA)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Baumann, Theodore F., Satcher, Jr., Joe H., and Gash, Alexander E. Preparation of hydrophobic organic aeorgels. United States: N. p., 2004. Web.
Baumann, Theodore F., Satcher, Jr., Joe H., & Gash, Alexander E. Preparation of hydrophobic organic aeorgels. United States.
Baumann, Theodore F., Satcher, Jr., Joe H., and Gash, Alexander E. 2004. "Preparation of hydrophobic organic aeorgels". United States. https://www.osti.gov/servlets/purl/1175087.
@article{osti_1175087,
title = {Preparation of hydrophobic organic aeorgels},
author = {Baumann, Theodore F. and Satcher, Jr., Joe H. and Gash, Alexander E.},
abstractNote = {Synthetic methods for the preparation of hydrophobic organics aerogels. One method involves the sol-gel polymerization of 1,3-dimethoxybenzene or 1,3,5-trimethoxybenzene with formaldehyde in non-aqueous solvents. Using a procedure analogous to the preparation of resorcinol-formaldehyde (RF) aerogels, this approach generates wet gels that can be dried using either supercritical solvent extraction to generate the new organic aerogels or air dried to produce an xerogel. Other methods involve the sol-gel polymerization of 1,3,5 trihydroxy benzene (phloroglucinol) or 1,3 dihydroxy benzene (resorcinol) and various aldehydes in non-aqueous solvents. These methods use a procedure analogous to the one-step base and two-step base/acid catalyzed polycondensation of phloroglucinol and formaldehyde, but the base catalyst used is triethylamine. These methods can be applied to a variety of other sol-gel precursors and solvent systems. These hydrophobic organics aerogels have numerous application potentials in the field of material absorbers and water-proof insulation.},
doi = {},
url = {https://www.osti.gov/biblio/1175087}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {10}
}