文献类型：期刊文献

英文题名：Energy-Saving One-Step Pre-Treatment Using an Activated Sodium Percarbonate System and Its Bleaching Mechanism for Cotton Fabric

作者：Li, Qing[1,2,3];Lu, Run[1];Liang, Yan[1];Gao, Kang[1];Jiang, Huiyu[1,4]

机构：[1]Wuhan Text Univ, Coll Chem & Chem Engn, Hubei Key Lab Biomass Fibers & Ecodyeing & Finish, Wuhan 430200, Peoples R China;[2]Soochow Univ, Jiangsu Engn Res Ctr Text Dyeing & Printing Energ, Discharge Reduct & Cleaner Prod, Suzhou 215123, Peoples R China;[3]Shaoxing Univ, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing 312000, Peoples R China;[4]Natl Innovat Ctr Adv Dyeing & Finishing Technol, Tai An 271000, Shandong, Peoples R China

年份：2022

卷号：15

期号：17

外文期刊名：MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000851830800001)、、EI(收录号：20223812750085)、Scopus(收录号：2-s2.0-85137927169)、WOS

基金：This work was supported by the Opening Project of Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (SDGC2101); Opening Project of the Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province (QJRZ1902); Opening Project of the Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing (STRZ202122); Opening Project ofWuhan Research Center of Ecodyeing & Finishing and Functional Textile (EDFT2021006); and Scientific Research Fund Project of National Innovation Center of Advanced Dyeing and Finishing Technology (ZJ2021A05).

语种：英文

外文关键词：pre-treatment; cotton; sodium percarbonate; bleaching mechanism; energy conservation

外文摘要：The traditional pre-treatment of cotton fabric hardly meets the requirement of low carbon emissions due to its large energy consumption and wastewater discharge. In this study, a low-temperature and near-neutral strategy was designed by establishing a tetraacetylethylenediamine (TAED)-activated sodium percarbonate (SPC) system. First, the effects of SPC concentration, temperature and duration on the whiteness index (WI) and capillary effect of cotton fabrics were investigated. Particularly, excess SPC's ability to create an additional bleaching effect was studied. The optimized activated pre-treatment was compared with the traditional pre-treatment in terms of the bleaching effect and energy consumption. Further, the degradation of morin, which is one of the natural pigments in cotton, was carried out in a homogeneous TAED/SPC system to reveal the bleaching mechanism. Lastly, the application performance of the treated cotton was evaluated by characterizing the dyeability, mechanical properties, morphology, etc. The research results showed that temperature had a significant influence on both the WI and capillary effect, followed by the SPC concentration and duration. The WI was positively correlated with the SPC concentration, but excess SPC could not produce an obvious additional effect. The WI of the fabric increased by 67.6% after the optimized activated bleaching using 10 mmol/L SPC and 15 mmol/L TAED at 70 degrees C for 30 min. Compared with the traditional process performed at 95 degrees C for 45 min, the activated process produced approximately 39.3% energy savings. Research on the bleaching mechanism indicated that the reactive species that participated in degrading the morin were the hydroxyl radical and superoxide radical, and the contribution degree of the former was larger than that of the latter. Two degradation components with molecular weights of 180 and 154 were detected using mass spectroscopy. Based on this, the bleaching mechanism of the TAED/SPC system was proposed. Moreover, the fabric after the activated pre-treatment had a suitable dyeability and strength, a lower wax residual and a smoother and cleaner fiber surface. The encouraging results showed that TAED/SPC is a promising bleaching system that is conducive to the sustainable advance of the textile industry.