Aline Ferreira Knihs, Larissa Klen Aragão, Miguel Angelo Granato, Andrea Cristiane Krause Bierhalz^*, Rita de Cassia Siqueira Curto Valle

Journal of Renewable Materials, Vol.12, No.9, pp. 1557-1571, 2024, DOI:10.32604/jrm.2024.052963 - 25 September 2024

Abstract The textile industry generates large volumes of waste throughout its production process. Most of this waste is colored, therefore, discoloration is an important step toward recycling and reusing this waste. This study focused on the chemical reductive discoloration of textile waste composed of cotton dyed with reactive dye. The experimental design demonstrated the significant influence of the concentration of reducing agent and time of reaction on the degree of whiteness of the cotton fibers. The concentration of the alkaline agent was not significant in the process. The optimization of the reaction conditions lead to Berger… More > Graphic Abstract

Lixia Gao¹, Sheng Shi^1,2,*, Wensheng Hou¹, Shuhua Wang¹, Zhifeng Yan¹, Chao Ge¹

Journal of Renewable Materials, Vol.8, No.6, pp. 703-713, 2020, DOI:10.32604/jrm.2020.09055 - 12 May 2020

Abstract In this study, waste cotton fabric was used as cellulose raw material and pretreated in aqueous NaOH/urea solution system to investigate the effect of NaOH/urea pretreatment solution on the hydrolysis of cotton fiber. The cotton fiber was pretreated with different conditions of aqueous NaOH/urea solution, and the pretreated cotton fiber was hydrolyzed under the same conditions as the original cotton fiber. The results of characterization analysis showed that water retention value of pretreated cotton fiber was higher than that of unpretreated sample. Moreover, the cotton fiber presented both a convoluted structure and a coarser surface,… More >