Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (6): 1268.

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Surface and Antibacterial Properties of Polyurethane with Fluorinated Bis-ammonium Salts Attached to Hard Segments

LUO Jian-Bin*, MA Chen, LIAO Rong, WAN Jing, ZHANG Peng, ZHANG Jie   

  1. College of Chemistry & Environment Protection Engineering, Southwest University for Nationalities, Chengdu 610041, China
  • Received:2009-09-14 Online:2010-06-10 Published:2010-06-10
  • Contact: LUO Jian-Bin. E-mail: luojb1971@163.com
  • Supported by:

    西南民族大学青年重点基金(批准号: 26701701)资助.

Abstract:

The surface properties of the novel polyurethanes with fluorinated bis-ammonium salts group(FQPUs) were studied by contact angle test and XPS test. For polyurethanes with pendant fluorinated bis-ammonium salts, addition of little fluorinated bis-ammonium salts chain extender(EDF) made the polyurethane surface saturated with ammonium salts and fluorinated chains. The fluorinated alkyl chains endowed polyurethane with very low surface energy and antibacterial adhesion properties as proven by surface free energy test. Water contact angle demonstrated that the fluorinated chains could not overturn and the antibacterial adhesion properties of polyurethane would be maintained. Moreover, this properties can make polyurethane with lower water adsorption. It was found by plate count that polyurethanes with fluorinated bis-ammonium salts chain extender(EDF)(FQPUs) all had excellent antibacterial properties against gram positive bacteria, i.e. S. aureus and a little lower antibacterial properties against gram-negative bacteria, i.e. E. coli.

Key words: Fluorinated bis-ammonium salt; Polyurethane; Antibacterial; Surface property

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