Bleaching and dyeing; fluid treatment and chemical modification – Chemical modification of textiles or fibers or products thereof – Cellulose fibers
Patent
1987-06-18
1989-10-03
Lieberman, Paul
Bleaching and dyeing; fluid treatment and chemical modification
Chemical modification of textiles or fibers or products thereof
Cellulose fibers
811551, 162102, D06M 100
Patent
active
048713708
ABSTRACT:
Novel cellulosic fiber with improved resistance to abrasion and increased permeability to chemicals characterized by highly stable crystalline cellulose III and cellulose IV forms is disclosed. Cellulose is selected from either fiber, yarn, fabric, cotton, or mercerized cotton treated with ammonia vapors at from about ambient to 140.degree. C. and from about 100 psi to 1700 psi for sufficient time to alter the interatomic planar distances and produce stable crystalline cellulose III polymorph. Crystalline cellulose III can also be immersed in ethylenediamine and then boiled in dimethylformamide to completely convert the III to cellulose IV.
REFERENCES:
Barry, A. J., Peterson, F. C., and King, A. J., "Interactions of Cellulose with Liquid Ammonia", J. Amer. Chem., Soc. 58, 333-337 (1936).
Clark, G. L. and Parker, E. A., "X-Ray Diffraction Study of the Action of Liquid Ammonia on Cellulose and Its Derivatives" J. Phys. Chem. 41, 777-786 (1937).
Calamari, T. A., Jr., Schreiber, S. P., Cooper, A. S., and Reeves, W. A., "Liquid Ammonia Modification of Cellulose in Cotton and Polyester/Cotton Textiles," Textile Chem. and Color. 3, 61-65 (1971).
Benerito Ruth R.
Calamari, Jr. Timothy A.
Yatsu Lawrence Y.
Fado John D.
Lieberman Paul
McNally John F.
Silverstein M. Howard
The United States of America as represented by the Secretary of
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