Origin of Acidity in Jute Fiber

Abstract

The nature of acidic functionalities associated with raw, demineralized, and sa ponified and demineralized jute fibers, and with a D-xylan derived from the raw fiber were investigated. Neutralization curves for each sample, prepared by plotting pH at different stages of neutralization against the amount of alkali added for a definite weight of the sample, were compared with one another. A technique, involving a diazo coupling reaction with some aromatic amines, was developed for estimating phenolic groups present in the lignin component of the fibers. The results pertaining to these investigations indicated that the free acidity in raw and demineralized jute fibers arises only from the phenolic groups of the lignin component.

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References

Aspinall, G.O. , and Das Gupta, P.C. , The Constitution of Jute Hemicellulose I, J. Chem. Soc., 3627-3631 (1958).

Bhattacherjee, H.P. , and Callow, H.J. , Action of Dilute Caustic Soda Solution on Jute Fibre, I Hydrolysis of Ester Linkages, J. Textile Inst. 43, T53-T59 (1952).

Das, N.N. , Das, S.C. , Dutt, A.S. , and Roy, A. , Lignin-Xylan Ester Linkage in Jute Fiber (Corchorus capsularis), Carbohydr. Res. 94, 73-82 (1981).

Dutton, G.G.S. , and Rogers, I.H. , The Occurrence of 4-O-Methyl-D-Glucuronic Acid in Jute Hemicellulose, Textile Res. J. 29, 285 (1959).

Dutton, G.G.S. , and Rogers, I.H. , Occurrence of 2-O-(4-O-Methyl-D-Glucopyranosiduronic Acid)-D-Xylose in Jute Hemicellulose, J. Am. Chem. Soc. 81, 2413-2415 (1959).

Fieser, L.F. , and Fieser, M. , "Organic Chemistry," D. C. Heath & Co., Boston, 1950, pp. 930-941.

Indian Standard Specification No. IS:271, 1969.

Sarkar, P.B. , Chatterjee, H. , and Mazumdar, A.K. , The Acid Nature of Jute Fibre, J. Textile Inst. 38, T318-T332 ( 1947).

Sarkar, P.B. , Chatterjee, H. , Mazumdar , A.K. , and Pal, K.B. , The Combination Between Lignin and Polyuronic Acid in Jute Fiber, J. Textile Inst. 39, T 1-T7 (1948).

10.

Sen Gupta, A.B. , Ray, A. , and Macmillan, W.G. , The Significance of the Presence of Phenolic Acid Lignin in the Formation of Dark Grey Colour in Daisee Jute, Sci. Cult. 24, 43-44 (1958).

11.

Srivastava, H.C. , and Adams, G.A. , Uronic Acids of Jute-Fiber Hemicellulose , Chem. Ind. London, 920 (1958).

12.

Srivastava, H.C. , and Adams, G.A. , Uronic Acid Components of Jute Fiber Hemicellulose , J. Am. Chem. Soc. 81, 2409 -2412 ( 1959).

13.

Srivastava, H.C. , Bishop, C.T. , and Adams, G.A. , Structure of an Aldotriouronic Acid Isolated from Jute Fiber Hemicellulose, J. Org. Chem. 26, 3958-3960 (1961).