Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (9): 63-67,74.doi: 10.3969/j.issn.1000-565X.2010.09.012

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Nanocellulose Whiskers as Thickening Rheological Agent for Waterborne Polyurethane Dispersion

Ye Dai-yong  Zhou Liu-jia   

  1. School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2009-12-28 Revised:2010-04-29 Online:2010-09-25 Published:2010-09-25
  • Contact: 叶代勇（1972-），男，博士，副教授，主要从事绿色精细化学工程研究． E-mail:cedyye@scut．edu．cn
  • About author:叶代勇（1972-），男，博士，副教授，主要从事绿色精细化学工程研究．
  • Supported by:

    国家自然科学基金资助项目（20646003）; 广东省自然科学基金资助项目（07300767）; 华南理工大学中央高校基本科研业务费专项资金资助项目（2009ZM0239）

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Abstract:

Nanocellulose whisker（NCW） suspension was prepared via the acid-catalyzed hydrolysis and the pro-duct was characterized.Then,the effects of temperature and NCW content on the viscosity of the suspension were analyzed,and the Ostwade power equation model of the suspension was discussed,finding that the viscosity of NCW suspension increases with the NCW content,but it is insensitive to temperature.Moreover,the effects of temperature and NCW content on the rheological properties of waterborne polyurethane（WPU） dispersion mixed with NCW suspension were investigated.The results show that the addition of NCW in the WPU dispersion helps to decrease the viscous flow activation energy and improve the thixotropy of the mixed system,meaning that NCW is an effective thickening agent of WPU dispersion.

Key words: nanocellulose whisker, waterborne polyurethane, rheological, thixotropy, functional additive