Electrical properties of cotton

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Electrical properties of cotton
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Day, Emily L ( Emily Louise )
United States -- Bureau of Agricultural Economics. -- Library
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U.S. Dept. of Agriculture, Bureau of Agricultural Economics ( Washington, D.C )
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.... ITED STATES DEPARTMENT OF AGRICULTURE
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Economic Library List No. 7. Washington, D.C., November 1939.


ELECTRICAL PROPERTIES OF COTTON

Some References to the Literature, 1931-date.


Cowipiled by Emily L. Day, Library Specialist in Cotton Marketing,
S'Blureau of Agricultural Economics, U.S. Department of Agriculture.


References in this list were taken
from Cotton Literature, volume 1, no.l
to volume 9, no.10, inclusive, January
S"11931 to October 1939.
|*


Ande, Noboru, and And., Atusi. Studies on electrokinetic potentials.
I, Measurements of the electrokinetic potentials at the interfaces be-
tween fibers and water. Chem. Soc. Japan Jour. (ITippon Kwagaku Kwaishi)
55(10): 968-978. October 1934. 385 T57J
In Japanese.
"The electrokinetic potentials of cotton, silk, and wool were measured
by the streaming-potential method. They were negative.-T.K." Chem. Abs.
.29(3): 660. Feb. 10, 1935.

Cater, A.E. Static electricity in rayon and othor textile processes. Textile
Manfr. 61(727): 277-278; (728): 313-314; (729): 361-362,368. July-September
1935. 304.8 T3126
Also in Rayon and Melliand Textile Monthly 16(10): 611-612. October
1935.
The relation of static electricity generation to humidity emand tempera-
ture conditions in cotton manufacture is mentioned.

Lottermose'r, A., and Gansel, L. Elektroosnrotische untersuchungen an baum-
wollzellulose und baumwollzelluloseestern und deren fArbugen. Melliand
Teitilberichte 12(6): 407-410. June 1931. 304.8 T312
Electro-osmotic investigations of cotton cellulose, cellulose esters,
and their dyeings.
"Electro-osmotic investigation indicates that raw, mercerized, bleached,
and doubly-bleached cotton carries negative charges, the size of which
decreases with the degree of bleaching. Cellulose acetate and benzoate






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carry a much smaller negative charge, while the amino-benzoate is posi-
tively charged. The nature of the charge in mordanted cotton varies
with the individual electrolytes. In the case of cotton, dyeing with
Congo Red and Crystal Ponceau diminishes the charge considerably, while
of the basic dyes, Methylene Blue decreases the charge, and Safranine
and Chrysoidine increase it somewhat. The influence of dyestuffs on the
nature of the charges in the various cellulose esters has also been in-
vestigated. The charge in cellulosic fibers appears to depend upon the
number of secondary valencies, but theories other than the mutual effect
of oppositely-charged colloids must be found to account for the altera-
tions in the charge which result on dyeing." Molliand Textile Monthly
3(10): 876. January 1932.

Meister, E. Ursachen und folgen dor olektrostatischen aufladung von faser-
stoffen. Melliand Textilberichte-19(1): 21-26. January 1938. 304.8 T312
Causes and removal of static charges on fibers.
"The occurrence of electrostatic charges on fibrous materials and their
disturbing effects in textile processes are discussed, and various methods
and devices for removing or neutralising the charges are briefly described.
Experiments with combed sliver have shown that charges arise when the
sliver is drawn out without contact with metal or other materials... A
device for measuring charges on yarns on spinning frames is also described
and the results of measurements on wool, cellulose acetate staple fibre,
Cuprama, and mixture yarns on a worsted spinning machine and on Vistra
CWW, Egyptian cotton, Zehlawo staple fibre, and Flex yarns on a cotton
spinning machine at 50 per cent. R. H. and different spindle speeds are
shown graphically and discussed... On the cotton ring spinning machine the
Vistra CWW yarn acquired a considerably higher charge than the cotton and
other yarns. The charge on the Flex yarn was lower than that on the cotton
yarn and it has been found that smooth regular flex yarns can be obtained
by spinning in a room at 50-55 per cent. R. H.-C." Textile Inst. Jour.
29(4): A201-A202. April 1938.

Tsunokaye, R., and Enomoto, G. Electrical conductance of silk and other
textile fibres. Soc. Dyors nd Colourists. Jour. 49(12): 377-379.
December 1933. 306.9 Scl
"The method of determining the electrical conductance of textile fibres
is described. The electrical conductance of cellulose artificial silks
is generally greater than that of natural silk, whilst that of cellulose
acetate silk is much less than that of other artificial silks."

Walker, A.C. Effect of atmospheric humidity and temperature on the relation
between moisture content and electric-l conductivity of cotton. Textile
Inst. Jour. 24(4): T145-T160. April 1933. 73.9 T31
Also in Bell System Tech. Jour. 12(4): 431-451. October 1933.
"The data to be given in this JaLper show the effect of successive
equilibrium humidity cycles on the relation between (a) relative humidity
and moisture content; (b) insulation resistance and relative humidity;
and (c) insulation resistance and noisturo content, for raw and rwater-
boiled cotton at constant tenrperature (25 C.)"
Work in connection with the above paper was carried out in the Bell
Telephone Laboratories, Inc., New York, N.Y.








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Walker, A.C., =nd Quell, M.H. Influence of ash constituents on the electrical
conduction of cotton. Textile Inst. Jourj 24(3): T123-T130 March 1933.
73.9 T31
"Evidence will be presented in this paper to show that the improvement
in d.-c. insulation resistance of cotton, secured by washing, is ac-
companied by a reduction in the inorganic ash content from about 1% of the
dry cotton weight to a value general. less than 0.3 per cent."
Cotton has been given primary consideration "since it is the most
economical material available for use in telephone apparatus insulation,
and the improvements in electrical properties secured by water washing
have led to its substitution for silk to a large extent in the telephone
industry."
Work in connection with the above paper was carried out in the Bell
Telephone Laboratories, Inc., New York, N.Y.








ECONOMIC LIBRARY LISTS


No. 1. State trade barriers; selected references. March 1939.

No. 2. The frozen food industry; selected references, January 1937 to
March 1939. April 1939.

No. 3. High drafting in cotton spinning; selected references. April
1939.

No. 4. Egg auctions; selected references. July 1939.

No. 5. Acts administered by Agricultural Marketing Service. October
1939.

No. 6. Periodicals relating to shipping. October 1939.

No. 7. Electrical properties of cotton; some references to the litera-
ture, 1931-date. November 1939.








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