title: The TAED/H2O2/NaHCO3 system as an approach to low-temperature and near-neutral pH bleaching of cotton.
abstract: A low-temperature and near-neutral pH bleaching system was conceived for cotton by incorporating TAED, H2O2 and NaHCO3. The TAED/H2O2/NaHCO3 system was investigated and optimized for bleaching of cotton using a central composite design (CCD) combined with response surface methodology (RSM). CCD experimental data were fitted to create a response surface quadratic model (RSQM) describing the degree of whiteness of bleached cotton fabric. Analysis of variance for the RSQM revealed that temperature was the most significant variable, followed by [TAED] and time, while [NaHCO3] was insignificant. An effective system was conducted by adding 5.75 g L(-1) TAED together with H2O2 and NaHCO3 at a molar ratio of 1:2.4:2.8 and applied to bleaching of cotton at 70 °C for 40 min. Compared to a commercial bleaching method, the TAED/H2O2/NaHCO3 system provided cotton with comparable degree of whiteness, slightly inferior water absorbency and acceptable dyeability, but had competitive advantage in protecting cotton from severe chemical damage in bleaching.
authors.affiliation: Key Laboratory of Eco-textiles, Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, China.
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Long
authors.forename: Changhai
authors.initials: C
authors.lastname: Xu
authors.forename: Jinmei
authors.initials: J
authors.lastname: Du
authors.forename: Shaohai
authors.initials: S
authors.lastname: Fu
mesh_terms: D000081:Acetamides / Q000737:chemistry*; D057886:Bleaching Agents / Q000737:chemistry*; D005029:Ethylenediamines / Q000737:chemistry*; D003368:Gossypium; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D017693:Sodium Bicarbonate / Q000737:chemistry*; D013696:Temperature; D013784:Textiles
chemical_list: D000081:Acetamides; D057886:Bleaching Agents; D005029:Ethylenediamines; C581836:N,N'-ethylenebis(N-acetylacetamide); D017693:Sodium Bicarbonate; D006861:Hydrogen Peroxide