华南理工大学学报(自然科学版) ›› 2014, Vol. 42 ›› Issue (10): 63-69.doi: 10.3969/j.issn.1000-565X.2014.10.011

• 化学化工 • 上一篇    下一篇

木质素改性产物的吸附与分散性能

邓永红1,2  郭运清1  邱学青1,2†  楼宏铭1,2   

  1. 1. 华南理工大学 化学与化工学院,广东 广州510640; 2. 华南理工大学 制浆造纸工程国家重点实验室,广东 广州510640
  • 收稿日期:2014-01-27 修回日期:2014-07-03 出版日期:2014-10-25 发布日期:2014-10-01
  • 通信作者: 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
  • 作者简介: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
  • 基金资助:

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

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)

摘要: 为了研究木质素改性产物(GCL1-JB)的结构对其分散稳定性及吸附特性的影响,通过向GCL1-JB水溶液中添加二氧六环制备一系列不同构象的GCL1-JB模型。利用分散稳定仪和逐层自组装技术研究不同构象GCL1-JB对水泥的分散稳定性及其吸附特性,发现GCL1-JB的构象越伸展,吸附量越小,但对水泥的分散稳定性更好。GCL1-JB构象较伸展时,能平坦地吸附在固体表面,形成致密平整的吸附膜,有效阻止水泥颗粒间的相互凝聚。这也是GCL1-JB分散稳定性优于木质素磺酸钠的重要原因。

关键词: 木质素改性产物, 构象, 伸展结构, 分散稳定性, 吸附特性

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

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