Whiteness improvement of citric acid crosslinked cotton fabrics by sodium hydrosulfite bleaching
Abstrak
Citric acid (CA)-crosslinked cotton fabrics show a yellowish appearance because CA forms C=C bonds during the heating process. The whiteness was improved by sodium hydrosulfite (Na2S2O4), which was confirmed by the Fourier transform infrared spectra. The computational calculations showed that Na2S2O4 is more effective than H2O2 when the system of CA-treated cotton is bleached. Based on the reaction mechanism of Na2S2O4 bleaching, the influences of Na2S2O4 concentration, bleaching temperature, bleaching time, bleaching pH on whiteness, and wrinkle recovery angle were investigated. The optional bleaching condition was 14% Na2S2O4 and sodium pyrophosphate (Na4P2O7), 70°C, and 40 minutes. The effect on the performance of fabrics bleached with Na2S2O4 was similar to the effect of non-formaldehyde crosslinker 1,2,3,4-butane tetracarboxylic acid (BTCA) and the widely used crosslinker dimethyloldihydroxyethyleneurea-treated cotton. CA-treated cotton bleached by Na2S2O4 showed a good persistence of bleaching effect.
Topik & Kata Kunci
Penulis (6)
Yunlong Sun
Zhangmi Huang
Guorun Fan
Xiangling Meng
Yige Han
Xiaoqing Yu
Akses Cepat
- Tahun Terbit
- 2022
- Sumber Database
- DOAJ
- DOI
- 10.1080/15440478.2022.2025984
- Akses
- Open Access ✓