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  • ASTROPHYSICS
  • ENERGY PRODUCTION AND CONVERSION
  • 2020-2020
  • 1980-1984
  • 1970-1974  (5)
  • 1925-1929
  • 1970  (5)
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  • 2020-2020
  • 1980-1984
  • 1970-1974  (5)
  • 1925-1929
Year
  • 1
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    Unknown
    Alkaline electrochemical cells and method of making (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Equilibrated cellulose ether membranes of increased electrolytic conductivity for use as separators in concentrated alkaline electrochemical cells are investigated. The method of making such membranes by equilibration to the degree desired in an aqueous alkali solution mantained at a temperature below about 10 C is described.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Process of treating cellulosic membrane and alkaline with membrane separator (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The improvement of water-soluble cellulose ether membranes for use as separators in concentrated alkaline battery cells is discussed. The process of contacting membranes with an aqueous alkali solution of concentration less than that of the alkali solution to be used in the battery but above that at which the membrane is soluble is described.
    Keywords: ENERGY PRODUCTION AND CONVERSION
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    NASA TECHNICAL REPORTS
  • 3
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    Separator for alkaline electric cells and method of making (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Modified cellulose ether films having an increased electrolytic conductivity and a useable flexibility and in certain instances an increased flexibility are presented. Battery separator membranes comprising a cellulose ether and a minor proportion of a compatible water soluble base selected from the group consisting of alkali metal and ammonium hydroxides, aliphatic amines, and aliphatic hydroxyamines are used.
    Keywords: ENERGY PRODUCTION AND CONVERSION
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    NASA TECHNICAL REPORTS
  • 4
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    Unknown
    Separator for alkaline electric batteries and method of making (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Battery separator membranes of high electrolytic conductivity comprising a cellulose ether and a compatible metallic salt of water soluble aliphatic acids and their hydroxy derivatives are described. It was found that methyl cellulose can be modified by another class of materials, nonpolymeric in nature, to form battery separator membranes of low electrolytic resistance but which have the flexibility of membranes made of unmodified methyl cellulose, and which in many cases enhance flexibility over membranes made with unmodified methyl cellulose. Separator membranes for electrochemical cells comprising a cellulose ether and a modified selected from the group consisting of metallic salts of water soluble alphatic acids and their hydroxy derivatives and to electrochemical cells utilizing said membranes are described.
    Keywords: ENERGY PRODUCTION AND CONVERSION
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    NASA TECHNICAL REPORTS
  • 5
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    Separator for alkaline batteries and method of making same (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The preparation of membranes suitable for use as separators in concentrated alkaline battery cells by selective solvolysis of copolymers of methacrylate esters with acrylate esters followed by addition of a base and to the resultant products is described. The method of making copolymers by first copolymerizing a methacrylate ester (or esters) with a more readily hydrolyzable ester, followed by a selective saponification whereby the methacrylate ester moieties remain essentially intact and the readily hydrolyzable ester moiety is suponified and to the partial or complete neutralization of the relatively brittle copolymer acid with a base to make membranes which are sufficiently flexible in the dry state so that they may be wrapped around electrodes without damage by handling is described.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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