Low-temperature bleaching of cotton knitting fabric with H2O2/PAG system

Liu, Kai; Zhang, Xuan; Yan, Kang

doi:10.1007/s10570-016-1167-8

Cited by 15 publications

(4 citation statements)

References 23 publications

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“…The authors demonstrated that peracetic acid is a more active bleach than peroxide since it readily forms the free hydroxyl radical. Zeng and Tang 19 disclosed sodium 4‐(2‐decanoyloxyethoxycarbonyloxy) benzene sulphonate and Liu et al 20 have studied pentaacetyl glucose (GPA) as effective bleach activators. Other examples of reported bleach activators include: xylose tetraacetate (TAX), di‐ N ‐acetyldimethylglyoxin (ADMG), sodium p ‐acetoxybenzene sulphonate (SABS), 1‐phenyl‐3‐acetylhydantoin (PAH), sodium trimethylhexanoyloxybenzene‐4‐sulphonate (STHOBS), tetraacetylglucoluril (TAGU) and triacetylcyanuric acid (TACA) 21–26 .…”

Section: Introductionmentioning

confidence: 99%

Novel bleach activator compounds derived from the reaction of isocyanic acid with selected nucleophiles

Lewis

Hawkes

2022

Coloration Technology

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Laundry detergents commonly contain bleach activators that react with the perhydroxy anion produced from perborate or percarbonate anions to form activated peroxy compounds; these enhance bleaching and stain removal capacity especially at lower temperatures, hydrogen peroxide being an inefficient bleach below 60°C. The most commonly used activators are N, N, N′, N′‐tetraacetylethylenediamine (TAED) and sodium nonanoyloxybenzenesulphonate (SNOBS) the former being used across Europe whereas the latter is used widely in the United States and Japan. This research studies the preparation of novel activator compounds which are carbamylated derivatives of selected nucleophiles using either solid or aqueous reactions of nucleophilic carboxylate anions with the highly reactive isocyanic acid entity derived from the acidification of sodium cyanate. The novel activator compounds were then assessed as bleach activators by testing against tea and bilberry‐stained cotton reference fabrics at 40°C in the presence of hydrogen peroxide at pH values ranging from 4 to 10; bleaching efficiency was assessed visually and colorimetrically. Results showed that all of the synthesised compounds were more effective bleach activators across the pH range tested than the standard TAED system.

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Section: Introductionmentioning

confidence: 99%

Novel bleach activator compounds derived from the reaction of isocyanic acid with selected nucleophiles

Lewis

Hawkes

2022

Coloration Technology

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“…These bleaching activators mainly include tetraacetylethylenediamine (TAED) (Hebeish et al 2009;Long et al 2013;Shao et al 2010;Xu et al 2013), N-[4-(triethylammoniomethyl)-benzoyl]-caprolactam chloride (TBCC) and other lactam-based cationic bleach activators (Chen et al 2016;Lee et al 2010;Lim et al 2006;Luo et al 2019;Xu et al 2015). Other activators like sodium nonanoyl oxybenzene sulphonate (NOBS) (Cai et al 2001), amino nitriles as well as the derivatives of the cyanamide (Neal JM 1998), thiourea (Abdel-Halim andAl-Deyab 2013), pentaacetyl glucose (PAG) (Liu et al 2017) and tetraacetylhydrazine (TH) (Liu et al 2018) are also effective low-temperature bleaching activators. Studies showed that bleach activators could react with HOO − in alkaline solution via the perhydrolysis reaction to form peroxyacid, which is recognized as a more kinetically reactive oxidant and has higher oxidation potential and stronger oxidizing properties compared to H 2 O 2 and enables cotton to be bleached at low temperature (Bianchetti et al 2015;Hofmann et al 1992).…”

Section: Introductionmentioning

confidence: 99%

An eco-friendly approach to low-temperature and near-neutral bleaching of cotton knitted fabrics using glycerol triacetate as an activator

et al. 2021

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Near-neutral bleaching of cotton fabrics at low temperature is of great importance for saving energy and ecological friendliness in textile industry. In this work, glycerol triacetate (GT) was investigated as an activator of hydrogen peroxide (H 2 O 2 ) for low temperature bleaching of cotton knitted fabrics, and satisfactory whiteness was obtained. The bleaching properties of H 2 O 2 /GT system for cotton was assessed by the CIE whiteness index, H 2 O 2 decomposition rate, concentration of generated peracetic acid (PAA) and bursting strength. Possible factors affecting the performance of H 2 O 2 /GT bleaching system were discussed in detail. Adding only 10 mmol/L GT to the hydrogen peroxide solution (60 mmol/L) to bleach cotton knitted fabrics at 60 ℃ for 60 min, the WI was signi cantly increased from 52.09 to 68.92.By using benzenepentacarboxylic acid as a uorescent probe for hydroxyl radical (HO•) detection, it was found that GT could clearly promote HO• generation and the concentration of HO• closely related to the WI of cotton fabric. Furthermore, the bleaching mechanism of H 2 O 2 /GT system to cotton was proposed by exploring the relationship between WI and HO• concentration. As a bleach activator, GT has more economical bene ts and better solubility in water than that of TAED. The H 2 O 2 /GT system may provide a cost-effective and environmentally friendly approach as alternative to conventional alkaline hightemperature bleaching of cotton.

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“…13,14 Successful degumming technology requires the removal of the gummy materials to a proper level, namely, improving the fineness and hand feeling of fiber by removing excessive gummy materials without causing much damage to the degree of polymerization (DP) value or the tenacity of the fiber. 1,[15][16][17] Researchers have devoted many efforts to developing excellent degumming methods, and several typical degumming methods have been established. Zhang et al 4 conducted flax SFT semi-degumming with gas phase ozone treatment, and prepared flax fiber with about 10 cN and a DP value of about 800.…”

mentioning

confidence: 99%

Influence of single gummy component removal/retention on the physicochemical properties of fibrilia fiber and the reaction behavior of the other components in the degumming process

Meng

2023

Textile Research Journal

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Although many degumming methods for fibrilia fiber have been established, the reaction priority of the gums and the influence of single gummy component removal/retention on the fiber property and the reaction behavior of the other components remain unclear. This study analyzed the above issues by the observing the change of fiber in microbial-mechanical ‘enzyme peeling’ and gas phase ozone treatment. Results showed that pectin removal could increase the fiber density significantly (∼60.3%) but would not cause damage to the fiber tenacity. The 2.5–4.5% pectin in untreated fiber could strongly restrict the removal of lignin and hemicellulose. Lignin had less influence on fiber density than pectin. The detailed composition of hemicellulose had a significant effect on fiber tenacity: the retention of xylan and mannan caused damage and benefit, respectively, to fiber tenacity. After the removal of 90.0% pectin and 23.0% hemicellulose, a deep delignification rate (>70.0%) could be obtained. The delignification rate of 70.0–80.0% was beneficial for the density decreasing and tenacity increasing of the fiber, while a delignification rate over 80.0% would cause the collapse of the cellulose structure and thus damage the fiber property.

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Low-temperature bleaching of cotton knitting fabric with H2O2/PAG system

Cited by 15 publications

References 23 publications

Novel bleach activator compounds derived from the reaction of isocyanic acid with selected nucleophiles

Novel bleach activator compounds derived from the reaction of isocyanic acid with selected nucleophiles

An eco-friendly approach to low-temperature and near-neutral bleaching of cotton knitted fabrics using glycerol triacetate as an activator

Influence of single gummy component removal/retention on the physicochemical properties of fibrilia fiber and the reaction behavior of the other components in the degumming process

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