Physicochemical and Sorptive Properties of a Phosphorylated Mercerized Cotton Fabric

Abstract

A process of phosphorylation for a mercerized cotton kersey fabric was investigated. After wet oxidation, the phosphorus content in each sample was determined by spectrophotometric analysis. The range was 0.179 to 0.950 mmol g–1. A significant decrease in the tensile strength of samples resulted from an increase of phosphoric acid concentration in the phosphorylating solution. The mercerization has a positive impact on the process of phosphorylation, as the phosphorus content was found to be three times higher in the samples that underwent mercerization. The sorption properties of phosphorylated cotton fabric were studied using the Cu2+ sorption process as a reference. The value of the static exchange capacity for the phosphorylated fabric was determined to reach its maximum when the concentration of the H3PO4 in the phosphorylating solution was 1.40 M, and was found to be 1.48 ± 0.11 mmol g–1 with the phosphorus content equal to 0.898 ± 0.090 mmol g–1. The sorption of Cu2+ by a single phosphorus-containing group occurred for samples with phosphorus content not exceeding 0.80 mmol g–1. The preliminary studies of micro-quantities of 241Am, 233U, and 239Pu radionuclide sorption from aqueous solutions with phosphorylated textile demonstrated the high efficiency.

Phosphorylated Cotton Cellulose as a Matrix for Generating Chlorine Dioxide

“…However, we assume that this occurs due to the interaction of sodium chlorite solution with phosphorus-containing groups. As it was noted earlier in [ 28 ], phosphorus-containing groups cannot be titrated in an aqueous solution, which indicates their extremely low acidic function. However, this does not prevent their reaction with NaClO 2 and the release of ClO 2 from the solution into the surrounding gas environment.…”

“…Fabric modification was carried out according to the procedure described in [ 28 ]. The dried fabric samples containing no more than 10% of moisture were treated with 2.80 mol L −1 urea solution, and 1.20, 0.80 or 0 mol L −1 phosphoric acid solutions at 80 °C for 1 h (the ratio of “sample” to “liquid” was 1:10).…”

“…The phosphorus content in cotton fabric before and after phosphorylation was determined by the spectrophotometric method based on the color intensity of the Sn(II) reduced phosphorus molybdenum complex. Complete oxidation of phosphorus in the cellulose material samples into phosphate ions was carried out according to the method described in [ 28 ]. The optical density of the blue phosphor-molybdenum reduced complex was detected at a wavelength of 700 nm (a 5.00 cm thick cell was used).…”

Phosphorylation of Kapok Fiber with Phytic Acid for Enhanced Flame Retardancy

“…Compared with the phosphorylation by conventional phosphoric acid and phosphate salts produced from phosphate rock, the phosphorylation by PA has the advantage of being environmentally friendly and can meet the requirements of green chemistry. In order to increase the extent of phosphorylation, the pretreatment of KF loose fibers was carried out using caustic soda with the additional aim of removing impurities [ 22 , 23 , 24 ], and urea was used as a swelling agent of cellulose and a catalytic agent of phosphorylation reaction [ 25 , 26 ]. In this work, the conditions of phosphorylation reaction of KF loose fibers were first discussed, and the resulting KF samples were characterized by Fourier transform infrared (FT-IR) spectroscopy, 31 P solid-state nuclear magnetic resonance (NMR) spectroscopy, and inductively coupled plasma-atomic emission spectrometry (ICP-AES).…”