Enhancement clay tolerance of PCE by lignin-based polyoxyethylene ether in montmorillonite-contained paste
- Resource Type
- Article
- Authors
- Xiao-Kang Li; Da-Feng Zheng; Tao Zheng; Xu-Liang Lin; Hong-ming Lou; Xueqing Qiu
- Source
- Journal of Industrial and Engineering Chemistry, 49(0), pp.168-175 May, 2017
- Subject
- 화학공학
- Language
- English
- ISSN
- 1876-794X
1226-086X
The dispersion ability of polycarboxylate ether (PCE) in fresh concrete is much impeded by clayimpurities. To improve the dispersion of PCE in the clay-contained concrete, lignin-based polyoxy-ethylene ether (PEG-grafted-lignin) was synthesized through polyethylene glycol (PEG) grafted to kraftlignin (KL). The results showed that PEG-grafted-lignin increased thefluidity of MMT-contained cementpaste when combined with PCE. It improved the rheological properties of MMT-contained cement pasteby reducing the yield stress and the rheological behavior index. The adsorption of PEG-grafted-lignin onMMT was more quickly than KL and the equilibrium adsorption amount was 31.43 mg/g at an initialconcentration of 100 mg/L. XRD revealed that PEG-grafted-lignin had inserted into the interlayerstructure of MMT, while DLS disclosed the spatial effect of PEG-grafted-lignin was much stronger thanPCE. This study put forward a new method in the anti-sludge study of PCE.