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| Modification of lignin for improvement it's water-soluble property and ability to complex with Zn2+ |
| Received:May 07, 2016 |
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| KeyWord:lignin, phenolation, hydroxymethylation, carboxymethylation, chelating agent |
| Author Name | Affiliation | E-mail | | CAO Sheng-lei | College of Resources and Environment, Northwest A & F University, Yangling 712100, China | | | GENG Zeng-chao | College of Resources and Environment, Northwest A & F University, Yangling 712100, China | gengzengchao@126.com | | WANG Yue-ling | College of Resources and Environment, Northwest A & F University, Yangling 712100, China | | | SANG Jie | Shaanxi Land Construction Group, Shaanxi Construction Land Engineering Technology Institute, Xi'an 710075, China | | | SUN Run-cang | College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China | |
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| Abstract: |
| In this study, corn cob lignin(L) from biorefining followed by acid precipitation was pretreated to increase the reaction activity sites. Lignin was modified by phenolation to obtain PL and further treatment by hydroxymethylation to obtain HPL. Then the acquired PL and HPL were modified through carboxymethylation to synthesize CMPL and CMHPL, respectively. L, PL, HPL, CMPL and CMHPL were further characterized by FTIR and elemental analyses, and L and CMHPL were determined by thermogravimetric analysis. The microscopic states of L, CMPL and CMHPL dispersed in water were observed by using a fluorescence microscope. The acid-base properties and the complexation phenomenon between lignins and Zn2+ were further analyzed by using a potentiometric titrator. Results showed that CMHPL had the best water-soluble property and the strongest ability to complex with Zn2+. |
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