Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (10): 63-69.doi: 10.3969/j.issn.1000-565X.2014.10.011

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Adsorption and Dispersion Performance of Modified Lignin

Deng Yong-hong1, 2  Guo Yun-qing1  Qiu Xue-qing1, 2  Lou hong-ming1, 2   

  1. 1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640,Guangdong,China;   2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2014-01-27 Revised:2014-07-03 Online:2014-10-25 Published:2014-10-01
  • Contact: 邱学青（1965-），男，教授，博士生导师，主要从事木质素资源化高效利用研究. E-mail:xueqingqiu66@163.com
  • About author:邓永红（1969-），女，博士，副教授，主要从事天然高分子溶液行为及自组装研究.Email:yhdeng@scut.edu.cn
  • Supported by:

    国家自然科学基金资助项目 (21374032，21376100)；国家“973”计划项目 (2012CB215302)

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Abstract:

In order to reveal the influence of the structure of the modified lignin GCL1-JB on its adsorption characteristics and dispersion stability, a series of GCL1-JB of different conformations were prepared by adding dioxane into the aqueous solution of GCL1-JB. Then, the dispersion stability of cement/GCL1-JB suspension and the adsorption characteristics of GCL1-JB of different conformations were determined by using a TurbiscanLab analyzer and by means of the sequential adsorption process. The results show that with the increase of the stretch conformation of GCL1-JB, the amount of GCL1-JB adsorbed on a solid surface decreases while the dispersion stability of GCL1-JB for cement particles increases. In addition, the GCL1-JB of more stretch conformation can adsorb flat  and forms a compact and smooth film, thus effectively preventing cement particles from agglomerating. This is why the dispersion stability of GCL1-JB is superior to that of sodium lignosulfonate.

Key words: modified lignin, conformations, stretch structure, dispersion stability, adsorption characteristic

CLC Number: