Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (9): 96-101.doi: 10.3969/j.issn.1000-565X.2010.09.018

• Materials Science & Technology • Previous Articles     Next Articles

Structure and Properties of Chitosan/Rectorite Nanocomposites

Wang Xiao-ying1  Liu Bo 1 Sun Run-cang1  Wu Jun2   

  1. 1.State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;2.South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,Guangdong,China
  • Received:2010-01-08 Revised:2010-03-18 Online:2010-09-25 Published:2010-09-25
  • Contact: 王小英（1978-），女，博士，讲师，主要从事再生资源化学生物学研究． E-mail:xyw@scut．edu．cn
  • About author:王小英（1978-），女，博士，讲师，主要从事再生资源化学生物学研究．
  • Supported by:

    国家“973”计划项目（2010CB732201）; 国家自然科学基金资助项目（30972323 30710103906）; 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（2009ZM0182）; 中国科学院海洋生物资源可持续利用重点实验室、广东省应用生物学重点实验室和广东省海洋药物重点实验室联合开放基金项目（LMB081002）

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Abstract:

Chitosan/rectorite nanocomposites with various rectorite contents were prepared via the solution intercalation method,and the thermal stability and antibacterial activity of the products were investigated.Then,the effects of rectorite content and interlayer distance on the properties of the products were analyzed.The results show that（1）chitosan chains insert into the rectorite layer and rectorite uniformly disperses in the chitosan matrix;（2） both the rectorite content and the interlayer distance greatly affect the properties of the nanocomposites;（3）the best intercalation effect can be achieved at a chitosan-to-rectorite mass ratio of 12∶1;（4）the nanocomposites are superior to chitosan in terms of antibacterial activity,with its minimum inhibition concentration and inhibition time for gram-positive bacteria espectively being 1/4～1/2 and 3～5 times that of chitosan;（5）the antibacterial activity of the nanocomposites,positive to the rectorite content and the interlayer distance,is better in restraining gram-positive bacteria than in restraining gram-negative bacteria;and（6）the thermal stability of the nanocomposites is stronger than that of chitosan.

Key words: chitosan, rectorite, nanocomposite, antibacterial activity, thermal stability