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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.

Inventors:
 [1];  [1]
  1. (Albuquerque, NM)
Issue Date:
Research Org.:
SANDIA CORP
OSTI Identifier:
872280
Patent Number(s):
5902562
Application Number:
08/960112
Assignee:
Sandia Corporation (Livermore, CA) SNL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; preparation; surface; permeability; carbons; preparing; carbon; materials; macropore; volume; provide; prepared; dissolving; carbonizable; polymer; precursor; solvent; solution; cooled; form; extracted; employing; non-solvent; removed; critical; drying; elevated; pressure; temperature; evaporation; vacuum; oven; dried; product; heated; inert; atmosphere; heating; step; maintained; time; sufficient; substantially; cross-link; material; cross-linked; carbonized; polymer precursor; carbon materials; cross-linked polymer; time sufficient; inert atmosphere; pore volume; carbon material; elevated pressure; polymer material; carbonizable polymer; heating step; /423/

Citation Formats

Lagasse, Robert R., and Schroeder, John L. Method for the preparation of high surface area high permeability carbons. United States: N. p., 1999. Web.
Lagasse, Robert R., & Schroeder, John L. Method for the preparation of high surface area high permeability carbons. United States.
Lagasse, Robert R., and Schroeder, John L. Tue . "Method for the preparation of high surface area high permeability carbons". United States. https://www.osti.gov/servlets/purl/872280.
@article{osti_872280,
title = {Method for the preparation of high surface area high permeability carbons},
author = {Lagasse, Robert R. and Schroeder, John 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {5}
}

Patent:

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