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| Study on Preparation and Application of Flax Lignosulfonate-based Dye Dispersants |
| Received:March 31, 2022 |
| DOI：10.11981/j.issn.1000-6842.2023.02.12 |
| Key Words:flax;lignosulfonate;separation and purification;dye dispersant;dye |
| Fund Project:中国博士后基金面上项目（2019M651050）。 |
| Author Name | Affiliation | Postcode | | WANG Junhao* | Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 | | LI Jinsong* | Mudanjiang Hengfeng Paper Co.， Ltd.， Mudanjiang， Heilongjiang Province， 157013 | 157013 | | LI Hongyan | Mudanjiang Hengfeng Paper Co.， Ltd.， Mudanjiang， Heilongjiang Province， 157013 | 157013 | | HOU Qingxi | Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 | | LIU Wei | Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457
Mudanjiang Hengfeng Paper Co.， Ltd.， Mudanjiang， Heilongjiang Province， 157013 | 157013 |
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| Abstract: |
| The dye dispersants were prepared by combining separation and purification and chemical modification using flax lignosulfonates as raw materials. Fourier transform infrared spectroscopy， ultraviolet spectrum， and particle size analysis were conducted to investigate the structure and stability of the dye dispersants. The as-prepared dye dispersants were added into disperse blue 79 and disperse red 73 to investigate the effects of different pretreatment methods and epichlorohydrin （ECH） dosage on properties of the dye dispersants. The results showed that ultrafiltration greatly improved the performance of the dye dispersants， endowing them with good dispersibility and thermostability. After ultrafiltration of flax lignosulfonates using ultrafiltration membrane with molecular weight of 1000， the resultant dye dispersants prepared with 3 mmol/g of ECH showed the best performance， with dye uptake in disperse blue 79 and disperse red 73 of 91% and 88%， and reduction hydrolysis rate of 15% and 11%， respectively. |
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