AI Article Synopsis
- Black liquor was modified by introducing amino groups through a Mannich reaction, resulting in aminated black liquor (ABL) which has improved properties.
- ABL showed greater stability in foam and reduced surface tension, leading to enhanced performance in mortar applications.
- The study suggests that ABL can serve as an effective wet mortar admixture while also addressing environmental concerns related to black liquor waste.
Article Abstract
In order to extend the application of black liquor (BL), amino group was introduced in lignin through Mannich reaction. The structure of the aminated black liquor (ABL) was characterized with FT-IR, elemental analysis, the zeta potential and the inherent viscosity. The foam generated by ABL was more stable, for the surface tension was lower. The results of the mortar test indicated that the water-retention rate of the fresh mortar incorporated with 0.3 wt% ABL was 89.1%; the consistency loss was about 39.7% after 4 h. When the dosage was less than 0.3 wt%, ABL could increase the bond strength of the hardened mortars. The results showed that ABL could be used as an effective ready-mixed wet mortar admixture. This study not only provided a new method to develop new mortar admixture, but also alleviated the pollution of BL.
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| http://dx.doi.org/10.1080/09593330.2017.1294622 | DOI Listing |
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