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- Title
Effect of enzymes on the scouring and bleaching properties of flax roves in supercritical CO<sub>2</sub>.
- Authors
Zhang, Juan; Qiao, Yan; Zheng, Huanda; Gao, Shihui; Zheng, Laijiu
- Abstract
Supercritical CO2 (SC-CO2) scouring and bleaching of flax roves was developed by using enzymes instead of chemical additives. Effect of dosage of enzyme, enzyme ratio, temperature, pressure, time and CO2 flowrate on the scouring and bleaching properties of flax roves was investigated. The results showed that the whiteness and residual gum content were significantly improved under appropriate conditions. Scouring and bleaching of flax roves by SC-CO2 in combination with compound enzymes consisting of cellulose, xylanase and glucose oxidase could increase whiteness and reduce residual gum content. Moreover, glucose oxidase catalyzes the oxidation of β-d-glucose to produce H2O2, leading to the bleaching of fibers. An optimized scouring and bleaching of flax roves in SC-CO2 was recommended at 50 °C and 15 MPa for 60 min with a dosage of enzyme of 3% (% weight of flax roves), an enzyme ratio (in mass) of 1:2:1 (cellulase: xylanase: glucose oxidase) and a CO2 flowrate of 30 g/min. SEM displays more vertical grooves and bulges appeared on the fiber surface. The breaking strength and elongation at break of the samples were improved with the variation of scouring and bleaching conditions in comparison with the original flax roves.
- Subjects
FLAX; GLUCOSE oxidase; ENZYMES; XYLANASES; CELLULASE; SUPERCRITICAL fluid extraction
- Publication
Cellulose, 2022, Vol 29, Issue 7, p3721
- ISSN
0969-0239
- Publication type
Article
- DOI
10.1007/s10570-022-04497-7