Sage Journals: Discover world-class research

Abstract

Diethylaminoethyl (DEAE)-cellulose, prepared at low DS and without change in crystallinity from that of the original cottons, was subjected to hydrolysis with 2.5 N HCI for various lengths of time ranging from 20 min to 5 hr. The yield of DEAE-hydrocellulose (insoluble fraction) ranged from 90.5% at 20 min to 79.2% at 5 hr. Throughout the hydrolysis, the percent nitrogen in the solubilized fraction was triple that in the insoluble fraction. Gas-liquid chroma tographic analysis to determine the distribution of substituents in the solubilized and insoluble fractions showed that the ratio of substituents in the 2-0- and 6-0-positions was higher in the insoluble fraction than in the solubilized frac tion. The 3-0-/6-0-ratio was higher in the solubilized fraction than in the insoluble fraction. The significance of these results as supporting evidence for two types of accessible surfaces of crystalline elementary fibrils in fibrous cotton cellu lose is discussed.

Keywords

Print cloth cloth. DEAE-cotton DEAE-hydrocellulose. Lead chloride. Chemically modified cotton. Hy drolysis DS moisture regain crystalline order insoluble fraction soluble fraction position ratios x-ray diffractograms accessibility (order/disorder). Accessible surfaces (two types). Fibrous cotton. Gas-liquid chromatography wet- cure.

Get full access to this article

View all access options for this article.

References

Bose, J.L. , Roberts, E.J. , and Rowland, S.P. , The Availability of Hydroxyl Groups of Native and Mercerized Cotton Cellulose , J. Appl. Polymer Sci. 15, 2999-3007 (1971).

Gilbert, S.M. and Smith, B.F. , A Degradation Study of Some Formaldehyde-Modified Celluloses, Textile Res. J . 40, 720-727 (1970).

Jeffries, R. , Roberts, J.G. , and Robinson , R.N. , Accessibility and Reaction Sites in Cotton, Textile Res. J . 38, 234-244 (1968).

Roberts, E.J. and Rowland, S.P. , Extent of Formation of Ether Linkages Between Tris(1-aziridinyl)phosphine Oxide and Cotton Cellulose, Textile Res. J. 40, 401-405 (1970).

Roberts, E.J. and Rowland, S.P. , Synthesis of Mono-O-(2-diethylaminoethyl)-D-glucoses and Distribution of Substituent Groups in O-(2-Diethylaminoethyl)cellulose , Can. J. Chem. 45, 261-265 (1967).

Roberts, E.J. , Wade, C.P. , and Rowland, S.P. , Effect of Base Concentration upon the Reactivities of The Hydroxyl Groups in Methyl D-Glucopyransides, Carbohydrate Res. 17, 393-399 (1971).

Rowland, S.P. , Cirino, V.O. , and Bullock, A.L. , Structural Components in Methyl Vinyl Sulfone Modified Cotton Cellulose, Can. J. Chem . 44, 1051-1058 (1966 ).

Rowland, S.P. , Mechanisms of Durable Press, Textile Chemist Colorist. In press Aug. or Sept.

Rowland, S.P. , Roberts, E.J. , and Bose, J.L. , Availability and State or Order of Hydroxyl Groups on the Surfaces of Microstructural Units of Crystalline Cotton Cellulose , J. Polymer Sci . 9, 1431-1441 (1971).

10.

Rowland, S.P. , Roberts, E.J. , Bose , J.L. , and Wade, C.P. , Assessment of the State of Order of Hydroxyl Groups and of Molecular Segments in Hydrocellulose , J. Polymer Sci. 9, 1623-1633 (1971 ).

11.

Rowland, S.P. , Roberts, E.J. , and Wade, C.P. , Selective Accessibilities of Hydroxyl Groups In The Microstructure of Cotton Cellulose, Textile Res. J., 39, 530-542 (1969).

12.

Sweeley, C.C. , Bentley, R. , Makita , M. , and Wells, M.W. , Gas-Liquid Chromatography of Trimethylsilyl Derivatives of Sugars and Related Substances , J. Amer. Chem. Soc. 85, 2497-2507 (1963 ).

13.

Ward, K., Jr. , Crystallinity of Cellulose and Its Significance for the Fiber Properties, Textile Res. J. 30, 363-372 (1950).

Evidence for Two Types of Accessible Surfaces in Fibrous Cotton

Abstract

Keywords

Get full access to this article

References