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Title: Method for the preparation of high surface area high permeability carbons

Abstract

A method for preparing carbon materials having high surface area and high macropore volume to provide high permeability. These carbon materials are prepared by dissolving a carbonizable polymer precursor, in a solvent. The solution is cooled to form a gel. The solvent is extracted from the gel by employing a non-solvent for the polymer. The non-solvent is removed by critical point drying in CO{sub 2} at an elevated pressure and temperature or evaporation in a vacuum oven. The dried product is heated in an inert atmosphere in a first heating step to a first temperature and maintained there for a time sufficient to substantially cross-link the polymer material. The cross-linked polymer material is then carbonized in an inert atmosphere. 3 figs.

Inventors:
;
Issue Date:
Research Org.:
Sandia Corporation
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
350307
Patent Number(s):
5,902,562
Application Number:
PAN: 8-960,112
Assignee:
Sandia Corp., Livermore, CA (United States) SNL; SCA: 400201; PA: EDB-99:063616; SN: 99002098249
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 11 May 1999
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; CARBONACEOUS MATERIALS; SURFACE AREA; POROSITY; PERMEABILITY; DISSOLUTION; POLYMERS; GELS; DRYING; CARBON DIOXIDE; SUPERCRITICAL STATE; CARBONIZATION

Citation Formats

Lagasse, R.R., and Schroeder, J.L. Method for the preparation of high surface area high permeability carbons. United States: N. p., 1999. Web.
Lagasse, R.R., & Schroeder, J.L. Method for the preparation of high surface area high permeability carbons. United States.
Lagasse, R.R., and Schroeder, J.L. Tue . "Method for the preparation of high surface area high permeability carbons". United States.
@article{osti_350307,
title = {Method for the preparation of high surface area high permeability carbons},
author = {Lagasse, R.R. and Schroeder, J.L.},
abstractNote = {A method for preparing carbon materials having high surface area and high macropore volume to provide high permeability. These carbon materials are prepared by dissolving a carbonizable polymer precursor, in a solvent. The solution is cooled to form a gel. The solvent is extracted from the gel by employing a non-solvent for the polymer. The non-solvent is removed by critical point drying in CO{sub 2} at an elevated pressure and temperature or evaporation in a vacuum oven. The dried product is heated in an inert atmosphere in a first heating step to a first temperature and maintained there for a time sufficient to substantially cross-link the polymer material. The cross-linked polymer material is then carbonized in an inert atmosphere. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {5}
}