Journal of Coatings Technology and Research

, Volume 15, Issue 6, pp 1239–1250 | Cite as

Development of direct contact-killing non-leaching antimicrobial polyurethanes through click chemistry

  • Kaimei Peng
  • Xuexin Dai
  • Haili Mao
  • Hongtao Zou
  • Zaibo Yang
  • Weiping Tu
  • Jianqing HuEmail author


A robust, efficient, and orthogonal click chemistry (copper (I)-catalyzed alkyne-azide cycloaddition) was used to prepare an antimicrobial polymer and precisely control the conjugation ratio of antibiotic molecules to polymer. Antimicrobial polyurethanes with pendant benzisothiazolinone (PU-BIT) were synthesized using click chemistry to connect azide functional polyurethane (PU-N3) and alkyne functional benzisothiazolinone (BIT-Al). The direct contact-killing and non-leaching antimicrobial properties of PU-BIT were verified by both antimicrobial drop and disk diffusion. This approach provides a new methodology and platform for the development of contact-killing and non-leaching antimicrobial materials for a variety of practical applications. This research is the first to demonstrate that the broad-spectrum BIT antibiotic is a selective antibiotic for Gram-positive bacteria when covalently linked to a polymer. PU-BIT film containing 0.8 wt% BIT exhibited a selective antimicrobial performance with bactericidal efficacy of 91.6% and 30% against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli, respectively. The mechanism of the selective antimicrobial activity of PU-BIT is also discussed.


Selective antimicrobial polymer Click chemistry Contact-killing Non-leaching antibiotic Polyurethane 



This work was supported by the National Natural Science Foundation of China (21762036) and Foundation for High-level Talents in Qiannan Normal University for Nationalities and Qiankehe LH [2015]7706.


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Copyright information

© American Coatings Association 2018

Authors and Affiliations

  • Kaimei Peng
    • 1
    • 2
  • Xuexin Dai
    • 1
  • Haili Mao
    • 1
  • Hongtao Zou
    • 1
  • Zaibo Yang
    • 1
  • Weiping Tu
    • 2
  • Jianqing Hu
    • 2
    Email author
  1. 1.School of Chemistry and Chemical EngineeringQiannan Normal University for NationalitiesDuyunChina
  2. 2.School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhouChina

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