摘要：This study gives a relative analysis on the performance of sodium silicate (SS) and aminopolycarboxylate based stabilizer for hydrogen peroxide bleaching of fabric. The function of stabilizers is to lessen the speed of hydrogen peroxide decomposition by forming complex a with hydrogen peroxide, i.e. a mediator composite, and with metal ions in the solution. Sodium silicate was the initial stabilizer used for hydrogen peroxide bleaching.But the problem of silicaceous deposits on fabric and equipment led to the search for better stabilizers.Three aminopolycarboxylate based stabilizers were investigated under identical conditions.These are N-(hydroxyethyl) ethylenediaminetriacetic acid (HEDTA), ethylenediaminetetra-acetic acid (EDTA) and diethylenetriaminepenta-acetic acid (DTPA).The criteria selected for assessing stabilizer performance was to carry out hydrogen peroxide bleaching in the presence and absence of substrate and metal ions. Also residual hydrogen peroxide over a period of time in the presence of different stabilizers was measured. To understand more about the effect of stabilizers, other parameters such as whiteness index, tensile strength, absorbency and fluidity were studied. The CIE whiteness index assessment of fabrics was measured by a spectrophotometer using suitable computer software. A universal strength Tester (Titan) was used to measure tensile strength. An Ostwald – Fenske Cuen viscosimeter was used to determine chemical degradation of cotton fabric by measurement of its fluidity and an embroidery hoop was used to determine absorbency.This study has provided valuable information for industrial use of aminopolycarboxylate based stabilizers.As a consequence of this investigation, highly active organic stabilizers for hydrogen peroxide bleaching as an alternative to sodium silicate were found
关键词：Bleaching; Hydrogen peroxide; Stabilizers; Sodium silicate and Aminopolycarboxylate
