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Title: Low-density microcellular foam and method of making same

Abstract

Low-density microcellular foam having a cell size of not greater than 2 .mu.m and method of making by dissolving cellulose acetate in an acetone-based solvent, gelling the solution in a water bath maintained at 0.degree.-10.degree. C for a selected period of time to allow impurities to diffuse out, freezing the gel, and then freeze-drying wherein water and solvents sublime and the gel structure solidifies into low-density microcellular foam. The foam has a density of 0.065 to 0.6.times.10.sup.3 kg/m.sup.3 and cell size of about 0.3 to 2 .mu.m. The small cell size foam is particularly applicable for encapsulation of laser targets.

Inventors:
 [1]
  1. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
862788
Patent Number(s):
4012265
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
low-density; microcellular; foam; method; cell; size; dissolving; cellulose; acetate; acetone-based; solvent; gelling; solution; water; bath; maintained; degree; -10; selected; period; time; allow; impurities; diffuse; freezing; freeze-drying; solvents; sublime; structure; solidifies; density; 065; times; 10; kg; particularly; applicable; encapsulation; laser; targets; water bath; low-density microcellular; density microcellular; particularly applicable; cell size; cellulose acetate; laser targets; microcellular foam; bath maintained; acetone-based solvent; allow impurities; selected period; size foam; solvents sublime; structure solidifies; laser target; cellular foam; dissolving cellulose; /106/376/

Citation Formats

Rinde, James A. Low-density microcellular foam and method of making same. United States: N. p., 1977. Web.
Rinde, James A. Low-density microcellular foam and method of making same. United States.
Rinde, James A. Sat . "Low-density microcellular foam and method of making same". United States. https://www.osti.gov/servlets/purl/862788.
@article{osti_862788,
title = {Low-density microcellular foam and method of making same},
author = {Rinde, James A},
abstractNote = {Low-density microcellular foam having a cell size of not greater than 2 .mu.m and method of making by dissolving cellulose acetate in an acetone-based solvent, gelling the solution in a water bath maintained at 0.degree.-10.degree. C for a selected period of time to allow impurities to diffuse out, freezing the gel, and then freeze-drying wherein water and solvents sublime and the gel structure solidifies into low-density microcellular foam. The foam has a density of 0.065 to 0.6.times.10.sup.3 kg/m.sup.3 and cell size of about 0.3 to 2 .mu.m. The small cell size foam is particularly applicable for encapsulation of laser targets.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {1}
}

Patent:

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