Preparation of Soluble Yarns by the Carboxymethylation of Cotton

Abstract

Water- and alkali-soluble cotton fibers, yarns, and threads have been prepared by two methods. The cotton is preferably pretreated by pressure-kiering in 2% sodium hydroxide to remove the noncellulosic materials, and then treated with monochloroacetic acid and sodium hydroxide by either a one-step or a two-step process. Where only disintegration or partial solubility is required, the one-step method is sufficient. Where complete solubility of the cot ton is required, the process must be carried out in two steps: a mild, followed by a stronger treatment. The treated cotton is neutralized in alcohol with acetic acid to produce water soluble products or with strong acids in alcohol to produce water-insoluble but alkali-soluble products. Cotton in the form of sliver, yarn, and thread has been successfully treated.

A novel photo-grafting of acrylamide onto carboxymethyl starch. 1. Utilization of CMS-g-PAAm in easy care finishing of cotton fabrics

“…The method of Daul et al (Daul et al, 1953) was adopted with some modifications. The method used depends on the back titration of the carboxyl groups with a standard HCl solution.…”

Combinatorial solution of the two-matrix model

“…. This generalization is of interest since any minimal C < 1 conformal theory may be obtained by an appropriate 4 choice of V (A) [11], [12]. Studying the necessary recursions (their number increasing with the order of the polynomial) one finds the masterfield equation…”

Preparation of cationic polyurethane and its application to acrylic fabrics

“…Untreated acrylic fabrics as well as the polymer‐treated fabrics were analyzed for the determination of their acid content. The fabrics was immersed in a standard sodium hydroxide solution of known concentration over night, and then the excess hydroxide was back titrated with standard HCl 21…”