Solvent spun rayon, modified cellulose fibers and derivatives

a symposium sponsored by the Cellulose, Paper, and Textile Division at the 173rd Meeting of the American Chemical Society, New Orleans, La., March 21-23, 1977
  • 269 Pages
  • 4.73 MB
  • 7781 Downloads
  • English

ACS , Washington
R
StatementAlbin F. Turbak, editor.
SeriesACS symposium series -- 58
ContributionsTurbak, Albin F., American Chemical Society. Cellulose, Paper and Textile Division., American Chemical Society (Meeting), (173rd : 1977 : New Orleans)
The Physical Object
Paginationix,269p. ;
ID Numbers
Open LibraryOL19901710M

PREVIOUS BOOK; NEXT BOOK; VIEW ALL BOOKS ALL BOOKS; Solvent Spun Rayon, Modified Cellulose Fibers and Derivatives. Editor(s): Albin F. Turbak 1; Volume Publication Date (Print): June 1, ISBN: OCLC Number: Description: ix, pages: illustrations ; 24 cm.

Contents: Rayon: a fiber with a future / H.L. Hergert and G.C. Daul --A critical review of cellulose solvent systems / A.F. Turbak, R.B. Hammer, R.E. Davies, and N.A. Portnoy --The spinning of unconventional cellulose solutions / D.M.

MacDonald --Production of rayon.

Details Solvent spun rayon, modified cellulose fibers and derivatives EPUB

In Solvent Spun Rayon, Modified Cellulose Fibers and Derivatives; Turbak, A.; ACS Symposium Series; American Chemical Society: Washington, DC, SOLVENT SPUN RAYON, MODIFIED CELLULOSE FIBERS 14 p r e c i p i t a t e a s o l i d mass, as compared to t r u l y spinning f i b e r s w i t h reasonable p h y s i c a l p r o p e r t i e s.

Get this from a library. Solvent spun rayon, modified cellulose fibers and derivatives: a symposium. [Albin F Turbak; American Chemical Society. Cellulose, Paper, and Textile Division.; American Chemical Society. Meeting;].

Wood cellulose, caustic soda and carbon disulfide, the major raw materials for rayon production by the existing viscose process, are not dependent upon oil and will continue to be available in ample supply.

On the other hand, the viscose process is energy intensive and has emission problems. The compatibility of cellulose with lignin is demonstrated throughout the plant world. This compatibility is not necessarily shown as an intimate mixture of the two polymers, but rather as a matrix structure of cellulose fibers in lignin.

Although chemical pulping systems have been developed to provide dissolving pulps free of lignin, it is surprising that there appear to be no. A consequence is that to prepare a useful cellulose acetate the cellulose must be completely esterified to a soluble triacetate and then subsequently hydrolyzed to the desired acetyl value.

A desirable alternative to prepare cellulose acetate would be to dissolve the cellulose in a suitable solvent, react it homogeneously to the desired acetyl value, and quench the reaction to give.

In the present research, the major aim was to design a thermoplastic cellulose derivative and produce filamentous fibers from it using a solvent-free, melt-spinning process.

Improved thermal processability of raw cellulose by chemical modification and polymer blending was crucial for successful melt : Yoshitaka Aranishi, Yoshiyuki Nishio. Fibers produced from cellulosic materials that cannot be used as fibers in their natural form. The cellulose is chemically changed during production so the resulting fibers are cellulose derivatives known as esters.

Acetate and triacetate are derivative cellulosic fibers. Fibers with a high wet modulus and intermediate tenacity were readily produced from proton donor systems involving hydroxylic coagulation baths such as water, alcohols and glycols.

A wide variety of fiber cross sections could be produced and proved to be related to the nature of the regenerant employed during spinning.

B.S. Gupta, in Biotextiles as Medical Implants, Rayon. Rayon is a regenerated cellulose fiber, which, although chemically similar to cotton, differs in that its molecular weight is about one-fifth and crystallinity about one-half that of cotton.

These differences make the traditional or regular rayon relatively weaker and more extensible, but about twice as. In a binary polymeric blend, the compatibility of cellulose and proteins is influenced by the characteristics of each polymer in the employed solvent system as well as processing conditions.

Therefore, utilizing solvents that can dissolve cellulose and proteins, and coagulants that are non-solvents for both polymers is of by: 1. The carbon fibers used by Swan & Edison in the nineteenth century were also used a century later as reinforcements for sophisticated plastic composites. L.H.

Despaissis patented the cuprammonium process for the production of regenerated cellulose (rayon) from a solution of cellulose and cuprammonium hydroxide (Schweitzer’s reagent) in (10).Author: Raymond B.

Seymour, Herman F. Mark, Linus Pauling, Charles H. Fisher, G. Allan Stahl, L. Sperling. Nylon and polyester are used for outer layers of coats and jackets because they are non absorbent and the smooth straight fibers pack closely to create compact and dense fabrics.

True A cotton/polyester blend shirt where both fibers are found in the same yarn.

Description Solvent spun rayon, modified cellulose fibers and derivatives EPUB

Anselm Payen, an early pioneer in polysaccharide, industrial, and agricultural chemistry, was the first to separate cellulose from wood and plants. He Author: Charles H.

Fisher. Nylon and polyester are used for outer layers of coats and jackets because they are non-absorbent and the smooth straight fibers pack closely to create compact and dense fibers. True A cotton/polyester blend shirt where both fibers are found in the same yarn.

Unlike inthe case of viscose rayon and cuprammonium rayon, where cellulose is dissolved and regenerated, cellulose acetate is manufactured by converting cellulose into a chemical compound of cellulose (or chem modified cellulose) which is then dissolved in a suitable solvent (chloroform or acetone) and spun by evaporating the solvent.

Highly concentrated solutions of acrylonitrile copolymers (PAN) in N-methylmorpholine N-oxide (NMMO) were obtained via the solid-phase activation ic interactions in the system at different stages of the dissolution process starting from solid-state activation and finishing with a transition to a viscous state were studied by IR spectroscopy, polarizing microscopy, Cited by: 5.

Fig. 2 shows the results of DSC experiments conducted for pure solvent and cellulose solutions. There are endotherms located between 62°C–75°C, the melting transitions of the monohydrated MMNO.

In the case of pure solvent, a sharp single endothermic peak appears at °C as a single sharp for the 5 wt.% cellulose solution, the melting transition is divided into Cited by: Cellulose fibers modified with silver nanoparticles were prepared using N-methylmorpholine-N-oxide as a direct solvent and analyzed in this study.

Structure and morphology of the cellulose films coagulated from novel cellulose/9 wt% aqueous (aq.) sodium hydroxide (NaOH) systems (polymer concentration CP≤ wt%) by using aq.

Download Solvent spun rayon, modified cellulose fibers and derivatives EPUB

sulfuric acid Cited by: Spinning of cellulose from N-methyl morpholine N-oxide in the presence of additives H. Chanzy* and M. Paillet Centre de Recherches sur les Macromol~cules V~g~tales, CNRS 53X, Grenoble C6dex, France and R.

Hag&ge Institut Textile de France, BPBagneux C~dex, France (Received 24 May ; accepted 14 July ) A series of ten additives were mixed with cellulose Cited by: [Show full abstract] rayon like fibers for comparison with those from cellulose.

Hence, a number of solvent systems have been elaborated that permit filtration, extrusion, and coagulation. Process. First, the polymer being spun must be converted into a fluid state. If the polymer is a thermoplastic then it can be simply melted, otherwise it is dissolved in a solvent or chemically treated to form soluble or thermoplastic derivatives.

The molten polymer is then forced through the spinneret, then it cools to a rubbery state, and then a solidified state. The resulting γ-Fe2O3/SiO2/RhB NPs were integrated with a renewable and naturally-abundant cellulose derivative (i.e.

cellulose acetate, CA) that was processed in the form of electrospun fibers. Cellulose fibers, such as wood pulp and vegetable fibers such as cotton are made up of fibrils on a macro, micro, and nanofiber scale that can be mechanically fibrillated into individualized fibrils (Homonoff et al.

()). Biofibers such as rayon, lyocel, and PLA also have a fibril structure that is subject to fibrillation. Solvent Spun Rayon, Modified Cellulose Fibers and Derivatives. A Symposium sponsored by the Cellulose, Paper, and Textile Division at the rd Meeting of the American Chemical Society, New Orleans, La., MarchACS Symposium Series 58 by Albin F.

Turbak, American Chemical Society Hardcover, Pages, Published by American Chemical. which of these fibers is a modified regenerated cellulosic. false. viscose is another name for acetate. which fiber is solvent spun cellulose.

olefin. fiber w the lowest density. azlon. which fiber is made from soybeans/milk. Textiles: Exam 2 Study Guide. 45 terms. DHE EXAM 2. 55 terms. chapter 3 fibers and yarns. 42 terms. Lyocell. Lyocell is a manmade fiber derived from cellulose, better known in the United States under the brand name Tencel.

Though it is related to rayon, another cellulosic fabric, lyocell is created by a solvent spinning technique, and the cellulose undergoes no. antistatic compounds increase the antibacterial nature of fibers.

a cotton poly blend shirt where both fibers are found in the same yarn is an example of a: a cotton poly blend shirt where both fibers are found as two separate yarns, one warps, one wefts, is an example of a: a smooth filament yarn could be made from.

Cotton fibers are a biological source of almost pure cellulose, but this is not usually used in food grade cellulose and are used instead for various cellulose derivatives, pharmaceutical, or.Cellulose is the most abundant organic polymer on the planet.

It is an important structural component of the primary cell wall of plants. The cellulose content of cotton fibers is about 90 percent. Not surprising, it is the main raw material for many semi-synthetic cellulose derivatives. 1. Ester Cellulose.Direct Dissolution of Cellulose: Background, Means and Applications.

By Carina Olsson and Gunnar Westman Both cotton and wood based cellulose can also be used as the basis for cellulose derivatives such as cellulose ethers and cellulose esters.

Fibers can be spun by air gap spinning in acetone and neutralized by Na 2 CO 3. The resulting Cited by: