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| Preparation and Evaluation of a Novel Phenolated Lignin Derivative as a Cationic Emulsifier |
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| DOI：10.11981/j.issn.1000-6842.2015.01.20 |
| Key Words:cationic emulsifier；kraft lignin；N-(2-aminoethyl) dehydroabietic acid amide； Mannich reaction |
| Fund Project:国家自然科学基金资助项目(31260161)；国家级大学生创业创新训练计划项目(2012CX037)。 |
| Author Name | Affiliation | | LIU Zu-guang* | College of Chemistry and Chemical Engineering， Guangxi University for Nationalities，Guangxi Key Laboratory of Chemistry and Engineering of Forest Products， Nanning， Guangxi Zhuang Autonomous Region， 530006 | | HUANG Can-jing | College of Chemistry and Chemical Engineering， Guangxi University for Nationalities，Guangxi Key Laboratory of Chemistry and Engineering of Forest Products， Nanning， Guangxi Zhuang Autonomous Region， 530006 | | LI Pin-zhen | College of Chemistry and Chemical Engineering， Guangxi University for Nationalities，Guangxi Key Laboratory of Chemistry and Engineering of Forest Products， Nanning， Guangxi Zhuang Autonomous Region， 530006 | | CAO Song | College of Chemistry and Chemical Engineering， Guangxi University for Nationalities，Guangxi Key Laboratory of Chemistry and Engineering of Forest Products， Nanning， Guangxi Zhuang Autonomous Region， 530006 |
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| Abstract: |
| A novel lignin derivative (ADRA-DETA-F-PKL)，in which phenol，dehydroabietyl groups and diethylenetriamine groups were introduced into the kraft lignin sequentially in order to prepare a cationic emulsifier with improved performance．The experiments showed that under alkaline conditions the content of phenolic hydroxyl groups in phenolated lignin increased by 30.3% when the mole ratio of phenol to lignin was 1∶1， the reaction temperature was 100℃ and reaction time was 1.5 hour，0.30 mole phenol molecules were correspondingly introduced into lignin per C9 unit．The weight-average molecular weight of phenolated lignin increased by 7%， molecular weight distribution index decreased from 1.49 to 1.29．Compared with lignin， the number of dehydroabietyl groups in phenolated lignin increased by 1.1 times and diethylenetriamine groups 0.42 times.The surface tension value of the product ADRA-DETA-F-KL was 35.0 mN/m at the concentration of 10 g/L in dilute hydrochloric acid solution with pH value of 2， its Zeta potential was as high as 38.0 mV，and its emulsifiability was 70 min． |
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