Silver Loading on DBD Plasma-Modified Woven PET Surface for Antimicrobial Property Improvement |
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Authors: | Surakerk Onsuratoom Ratana Rujiravanit Thammanoon Sreethawong Seiichi Tokura Sumaeth Chavadej |
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Institution: | (1) The Petroleum and Petrochemical College, Chulalongkorn University, Soi Chula 12, Phyathai Road, Pathumwan, Bangkok, 10330, Thailand;(2) Center for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University, Bangkok, 10330, Thailand;(3) Faculty of Chemistry, Materials, and Bioengineering, and High Technology Research Center, Kansai University, Suita, Osaka 564-8680, Japan; |
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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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