Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (11): 74-79,116.doi: 10.3969/j.issn.1000-565X.2010.11.014

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Effect of Inorganic Salts on Electrostatic Layer-by-Layer Self-Assembly of Lignosulfonate

Deng Yong-hong  Wu Yuan  Feng Xin-Jia  Ouyang Xin-ping  Yang Dong-jie  Qiu Xue-qing    

  1. School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2010-05-05 Revised:2010-05-19 Online:2010-11-25 Published:2010-11-25
  • 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的研究．E-mail：cexqqiu@scut．edu．cn E-mail:yhdeng@scut．edu．cn
  • 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的研究．
  • Supported by:

    国家杰出青年科学基金资助项目（20925622）; 国家自然科学基金资助项目（20976064）; 广东省科技计划项目（2009B050600004）

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Abstract:

Lignin multilayer films were fabricated from salt-added lignosulfonate（SL） and poly（diallyldimethylammonium chloride）（PDAC） by the electrostatic layer-by-layer self-assembly,and the effect of salt on the SL/PDAC self-assembly was studied in this work.The self-assembly process was monitored by means of UV-vis spectroscopy,and the surface morphology of the films was observed via AFM.The results show that both the ionic strength and the salt species of the SL dipping solutions greatly influence the adsorption characteristics of SL during SL/PDAC self-assembly.When NaCl is added,the adsorbed amount of SL increases,the adsorption rate reduces,and the surface roughness of the SL/PDAC self-assembled films increases with the increase ionic strength in the investigated range.At the same ionic strength,the adsorbed amount of SL increases with the cation radius when LiCl,NaCl or KCl is added,while it decreases with the increase anion radius when NaCl,NaBr or NaI is added.

Key words: ionic strength, inorganic salt, lignosulfonate, adsorption, self-assembly