Printer Friendly
The Free Dictionary
906,012,139 visitors served.
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

cellophane
(redirected from Celaphane)

   Also found in: Wikipedia, Hutchinson 0.01 sec.
cellophane, thin, transparent sheet or tube of regenerated cellulose cellulose, chief constituent of the cell walls of plants. Chemically, it is a carbohydrate that is a high molecular weight polysaccharide. Raw cotton is composed of 91% pure cellulose; other important natural sources are flax, hemp, jute, straw, and wood.
..... Click the link for more information.
. Cellophane is used in packaging and as a membrane for dialysis dialysis (dīăl`ĭsĭs), in chemistry, transfer of solute (dissolved solids) across a semipermeable membrane.
..... Click the link for more information.
. It is sometimes dyed and can be moisture-proofed by a thin coating of pyroxylin pyroxylin (pīrŏk`sĭlĭn), partially nitrated cellulose (see nitrocellulose ).
..... Click the link for more information.
. There are several steps in the preparation of cellophane from raw cellulose. The cellulose is first treated with an alkali, e.g., sodium hydroxide, and mixed with carbon disulfide to form viscose (see viscose process viscose process (vĭs`kōs), method widely used for the commercial preparation of rayon .
..... Click the link for more information.
). The viscose is aged for several days and then forced through a straight or circular slit into a dilute acid solution. The dissolved cellulose precipitates, and this regenerated cellulose has a lower molecular weight and a less orderly structure than the cellulose from which it is formed.

?Page tools
Printer friendly
Cite / link
Email
Feedback
? Mentioned in
 
Encyclopedia browser? ? Full browser
 
 
Encyclopedia
?

Disclaimer | Privacy policy | Feedback | Copyright © 2008 Farlex, Inc.
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Terms of Use.