title: Whiteness improvement of citric acid crosslinked cotton fabrics: H2O2 bleaching under alkaline condition.
abstract: Polycarboxylic acids have been employed as formaldehyde-free crosslinking agents in anti-wrinkle treatment for cotton fabrics. Cotton fabrics treated by citric acid (CA) catalyzed with effective catalysts have shown satisfactory anti-wrinkle properties. Meanwhile, CA is a natural-based and environmental friendly compound. However, the yellowing of CA treated fabrics is a stumbling block for its practical application. Due to the fact that CA firstly forms aconitic acid (AA) before forming anhydrides, the cause of the yellowing, hydrogen peroxide (H2O2) bleaching was adopted to treat the CA treated fabrics in order to break the CC bond structure and reduce the yellow color but retaining the desired anti-wrinkle properties. Thermogravimetric analysis and Fourier transformed infrared spectroscopy were employed to investigate the reactions. The results revealed that the H2O2 bleaching can effectively improve the whiteness and also maintain a good anti-wrinkle performance of the CA treated fabrics under an appropriate bleaching temperature and time.
authors.affiliation: Division of Textiles and Clothing, University of California, Davis, CA 95616, USA.
authors.forename: Peixin
authors.initials: P
authors.lastname: Tang
authors.affiliation: Division of Textiles and Clothing, University of California, Davis, CA 95616, USA; College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China.
authors.forename: Bolin
authors.initials: B
authors.lastname: Ji
authors.affiliation: Division of Textiles and Clothing, University of California, Davis, CA 95616, USA. Electronic address: gysun@ucdavis.edu.
authors.forename: Gang
authors.initials: G
authors.lastname: Sun
keywords: Anti-wrinkle; Citric acid; Citric acid anhydrous (PubChem CID: 311); H(2)O(2) bleaching; Hydrogen peroxide (PubChem CID: 784); Sodium carbonate anhydrous (PubChem CID: 10340); Sodium hypophosphite monohydrate (PubChem CID: 23708894); Sodium silicate (PubChem CID: 23266); Strength; WI; Yellowing; trans-Aconitic acid (PubChem CID: 444212)