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Silver Loading on DBD Plasma-Modified Woven PET Surface for Antimicrobial Property Improvement

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Abstract

In this work, the hydrophilic improvement of a woven PET surface was accomplished by a plasma technique. The woven PET surface was plasma-treated by dielectric barrier discharge (DBD) under various operating conditions (electrode gap distance, plasma treatment time, input voltage, and input frequency) and various gaseous environments (air, O2, N2, and Ar) in order to improve its hydrophilicity. It was experimentally found that a decrease in electrode gap distance and an increase in input voltage increased the electric field strength, leading to higher hydrophilicity of the PET surface characterized by wickability and contact angle measurements. In comparisons among the studied environmental gases, air gave the highest hydrophilicity, being comparable to O2, while Ar and N2 gave lower hydrophilicity of the woven PET surface. The optimum conditions for a maximum hydrophilicity of the PET surface were an electrode gap distance of 4 mm, a plasma treatment time of 10 s, an output voltage of 15 kV, and a frequency of 350 Hz under air environment. After the plasma treatment under the obtained optimum conditions, the woven PET was loaded with Ag particles using a AgNO3 aqueous solution in order to obtain the antimicrobial property. The plasma-treated woven PET loaded with Ag particles exhibited good 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 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

    Surakerk Onsuratoom, 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. Surakerk Onsuratoom
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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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Onsuratoom, S., Rujiravanit, R., Sreethawong, T. et al. Silver Loading on DBD Plasma-Modified Woven PET Surface for Antimicrobial Property Improvement. Plasma Chem Plasma Process 30, 191–206 (2010). https://doi.org/10.1007/s11090-009-9199-6

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  • DOI: https://doi.org/10.1007/s11090-009-9199-6

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