Method of making a cellulose acetate low density microcellular foam
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 0-10.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 adaptable for encapsulation of laser targets.
- Inventors:
-
- Livermore, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 863201
- Patent Number(s):
- 4118449
- Assignee:
- United States of America as presprented by United States (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:
- method; cellulose; acetate; density; microcellular; foam; low-density; cell; size; dissolving; acetone-based; solvent; gelling; solution; water; bath; maintained; 0-10; degree; selected; period; time; allow; impurities; diffuse; freezing; freeze-drying; solvents; sublime; structure; solidifies; 065; times; 10; kg; particularly; adaptable; encapsulation; laser; targets; water bath; low-density microcellular; particularly adaptable; density microcellular; 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; /264/106/
Citation Formats
Rinde, James A. Method of making a cellulose acetate low density microcellular foam. United States: N. p., 1978.
Web.
Rinde, James A. Method of making a cellulose acetate low density microcellular foam. United States.
Rinde, James A. Sun .
"Method of making a cellulose acetate low density microcellular foam". United States. https://www.osti.gov/servlets/purl/863201.
@article{osti_863201,
title = {Method of making a cellulose acetate low density microcellular foam},
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 0-10.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 adaptable for encapsulation of laser targets.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1978},
month = {Sun Jan 01 00:00:00 EST 1978}
}
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