Bulletin of the American Physical Society
75th Annual Gaseous Electronics Conference
Volume 67, Number 9
Monday–Friday, October 3–7, 2022;
Sendai International Center, Sendai, Japan
The session times in this program are intended for Japan Standard Time zone in Tokyo, Japan (GMT+9)
Session EF3: Plasma Medical & Agricultural Application III
1:30 PM–3:15 PM,
Friday, October 7, 2022
Sendai International Center
Room: Hagi
Chair: Jun-Seok Oh, Osaka Metropolitan University
Abstract: EF3.00004 : Surface Modification Analysis of the Closed Containers that are used in Plasma Treatments of Food, Agriculture, and Biomedical Samples*
2:30 PM–2:45 PM
Presenter:
Naman Bhatt
(North Carolina State University)
Authors:
Naman Bhatt
(North Carolina State University)
Joshua Morsell
(North Carolina State University)
Duncan P Trosan
(North Carolina State University)
Patrick D Walther
(North Carolina State University)
Katharina Stapelmann
(North Carolina State University)
Steven Shannon
(North Carolina State University)
FTIR and Raman spectroscopy show increased oxygen functional groups, which make LDPE, PET, and nylon surfaces more hydrophilic. A recovery in contact angle was observed within 5 days of 1 minute air plasma treatment. Longer treatment time leads to permanent surface functionalization in LDPE and nylon, showing no recovery in contact angle. Depletion of fluorine species was observed in plasma treated Teflon FEP. This leads to enhanced hydrophilicity and no recovery was observed in the contact angle. Some of the depleted fluorine species get attached to the treated sample, shown in the XPS analysis. Plasma treatment inside glass vials show trace amounts of sodium on the treated sample.
*Authors would like to acknowledge the support of the state of North Carolina and DOE EERE Grant DE-EE0009945
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