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Surface Characterization and Antimicrobial Activity of Chitosan-Deposited DBD Plasma-Modified Woven PET Surface

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Abstract

In this work, a woven PET with an antimicrobial activity was prepared by depositing chitosan on its surface. Firstly, the hydrophilic property of the PET surface was achieved by a plasma treatment using dielectric barrier discharge (DBD). The hydrophilic property of the PET surface was characterized by wickability and contact angle measurements. The XPS analysis revealed an increment of oxygen-containing polar groups, such as C–O and O–C=O, on the PET surface after the plasma treatment, resulting in an enhanced hydrophilic property. The plasma-treated PET specimen was further deposited with chitosan by immersing in a chitosan acetate aqueous solution. The effects of temperature, chitosan concentration, and number of rinses on the amount of deposited chitosan on the PET surface were investigated. The disappearance of the above-mentioned polar groups from the PET surface was clearly observed after the chitosan deposition, indicating the involvement of these functional groups in interacting with the chitosan. The chitosan-deposited plasma-treated woven PET possessed an exceptionally high antimicrobial activity against both E. coli (gram-negative bacteria) and S. aureus (gram-positive bacteria).

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Acknowledgments

The authors would like to thank Thai Negoro Co., Ltd., Thailand; the Sustainable Petroleum and Petrochemicals Research Unit, Center for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University, Thailand; and the Petrochemical and Environmental Catalysis Research Unit under the Ratchadapisek Somphot Endowment Fund, Chulalongkorn University, Thailand. The authors would also like to thank Dr. Hideaki Nagahama, Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials, and Bioengineering, Kansai University, Japan for his assistance in the XPS analysis.

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Authors and Affiliations

  1. The Petroleum and Petrochemical College, Chulalongkorn University, Soi Chula 12, Phyathai Road, Pathumwan, Bangkok, 10330, Thailand

    Pannee Sophonvachiraporn, Ratana Rujiravanit, Thammanoon Sreethawong & Sumaeth Chavadej

  2. Center for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University, Bangkok, 10330, Thailand

    Ratana Rujiravanit, Thammanoon Sreethawong & Sumaeth Chavadej

  3. Faculty of Chemistry, Materials, and Bioengineering, and High Technology Research Center, Kansai University, Suita, Osaka, 564-8680, Japan

    Seiichi Tokura

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  1. Pannee Sophonvachiraporn
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  2. Ratana Rujiravanit
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  3. Thammanoon Sreethawong
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  4. Seiichi Tokura
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  5. Sumaeth Chavadej
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Correspondence to Ratana Rujiravanit or Thammanoon Sreethawong.

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Sophonvachiraporn, P., Rujiravanit, R., Sreethawong, T. et al. Surface Characterization and Antimicrobial Activity of Chitosan-Deposited DBD Plasma-Modified Woven PET Surface. Plasma Chem Plasma Process 31, 233–249 (2011). https://doi.org/10.1007/s11090-010-9276-x

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  • DOI: https://doi.org/10.1007/s11090-010-9276-x

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