The absorption of direct dyes by crosslinked cellulose. I. The equilibrium of dyeing

Authors

  • E. Chianakwalam Ibe,

    1. Fibers and Polymers Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
    Current affiliation:
    1. The Nigerian National Oil Corporation, P.M.B. 12650, Lagos, Nigeria
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  • Emery I. Valko

    1. Fibers and Polymers Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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    • Deceased June 20, 1975.


  • This paper is based on the thesis of E. Chianakwalam Ibe submitted in May 1970 to the Massachusetts Institute of Technology in partial fulfillment of the requirements for the degree of Doctor of Science.

Abstract

The effect of the degree of chemical crosslinking of cellulose with two bifunctional crosslinking agents dimethylol ethylene are (DMEU) and bis (hydroxyethyl) sulfur (BHES), on the equilibrium absorption of the direct dyes Chlorazol Sky Blue FF (C.I. Direct Blue 1) and Chrysophenine G (C.I. Direct Yellow 12) has been reported. The results show the increasing reduction of equilibrium dye absorption with increasing crosslink density. However, the maximum loss of absorption is about less than half of the amount absorbed by uncrosslinked cellulose. The results have been interpreted by reference to the parameters affecting the free energy of dyeing and the relevant models (pore model and gel model) available for explaining the fine structure of swollen cellulose.

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