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Effect of Cationic Sesbania Gum Dyeing Assistance on Pulp Fiber Dyeing
Received:November 25, 2022  
DOI：10.11980/j.issn.0254-508X.2023.06.005
Key Words:cationic sesbania gum  dyeing assistance  in-pulp dyeing  dyeing effect
Author NameAffiliationPostcode
HAN Jiyou Minfeng Special Paper Co.， Ltd.， Jiaxing， Zhejiang Province， 314000 314000
PAN Siyu State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
LIANG Renhua State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
YANG Rendang* State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
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Abstract:To achieve salt-free dyeing， this study introduced cationic sesbania gum as a dyeing assistance to improve the in-pulp dyeing effect by enhancing the adsorption between the dye and pulp fibers. The results showed that cationic sesbania gum was effective as a dyeing assistance for GL dye. Optical microscopy and SEM showed that the GL dye， pulp fibers， and cationic sesbania gum were tightly bound. The effect of pH value， temperature， and cationic sesbania gum dosage on the dyeing effect of pulp fibers was investigated by single-factor experiments， and the optimal dyeing conditions were determined as follows： cationic sesbania gum dosage 0.2%， pH value of dyeing solution 3， dyeing temperature 45 ℃， and the dye uptake reached 92.6% under this condition. The dyeing adsorption kinetic model and dyeing adsorption isotherm were established， showing that the dyeing time had negligible effect on dyeing effect， which could be effectively improved by appropriately increasing the initial concentration of dyeing solution.
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