Study on the surface sterilization and modification of medical poly (tetrafluoroethylene) by remote argon plasma
- VernacularTitle:远程氩等离子体对医用聚四氟乙烯表面灭菌与改性的研究
- Author:
Hongxia LIU
;
Jierong CHEN
- Publication Type:Journal Article
- Keywords:
remote argon plasma;
Escherichia coli;
sterilization;
poly(tetrafluoroethylene)(PTFE);
surface modification
- From:Journal of Xi'an Jiaotong University(Medical Sciences)
1982;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the surface sterilization and modification of medical poly(tetrafluoroethylene)(PTFE) by remote argon plasma.Methods Carrier quantitative bactericidal test was used to examine the germicidal effect(GE) of the E.coli on the surface of medical PTFE film and surface structure,performances of sterilized PTFE were characterized by the water contact angle,mass loss and X-ray photoelectron spectroscopy(XPS).Results Both remote and conventional argon plasmas could sterilize effectively(GE≥3.769) in the conditions of plasma RF power 100 W,exposure time 120 s and argon flux 20 cm3/min.Remote argon plasma sterilization made the PTFE surface have higher hydrophilicity(?=58.5?) than the conventional argon plasma sterilization(?=70.5?) and did not cause remarkable degradation and damages in terms of the mass loss(mass loss was 11.8%).Remote argon plasma sterilization could enhance interaction reactions with argon radicals relative to those with electron and argon ions,thereby contributing more effectively to defluorination(F/C=2.24) from the PTFE than the conventional argon plasma sterilization(F/C=2.49) and more effectively to the formation of oxygen functionalities on the PTFE surface.Conclusion Remote argon plasma can inactivate E.coli effectively and at the same time bring better surface modification of PTFE.
