Excimer laser induced surface chemical modification of polytetrafluoroethylene

K. Revesz, B. Hopp, Z. Bor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Polytetrafluoroethylene has a notoriously non adhesive and non reactive character. Its successful surface photochemical modification was performed by irradiating the polytetrafluoroethylene/liquid triethylamine interface with an ArF excimer laser (λ = 193 nm). Due to the photochemical treatment the polytetrafluoroethylene surface became more hydrophilic. The water receding contact angle decreased from 94° to 43°. The reaction cross section was determined from the decrease of the contact angles. It was found to be as high as 6.4×10-18 cm2. XPS measurements evidenced the removal of fluorine from the polytetrafluoroethylene, incorporation of alkyl carbon and nitrogen. Photochemical dissociation path of the triethylamine makes probable that it bonded to the fluoropolymer backbone via the α-carbon atom of an ethyl group. A radical, or a photoinduced electron transfer mechanism was suggested to describe this reaction. A selective area electroless plating of silver was performed after pretreating the sample with patterned photomodification. The increased adhesion of the sample was proved by gluing with epoxy resin. As a result of the surface modification the tensile strength of gluing increased by 210x and reached 24% of the value characteristic for the bulk material.

Original languageEnglish
Title of host publicationApplied Surface Science
EditorsC.N. Afonso, E. Matthias, T. Szorenyi
Volume109-110
Publication statusPublished - Jan 1 1997
EventProceedings of the 1996 E-MRS Spring Conference - Strasbourg, Fr
Duration: Jun 4 1996Jun 7 1996

Other

OtherProceedings of the 1996 E-MRS Spring Conference
CityStrasbourg, Fr
Period6/4/966/7/96

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

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  • Cite this

    Revesz, K., Hopp, B., & Bor, Z. (1997). Excimer laser induced surface chemical modification of polytetrafluoroethylene. In C. N. Afonso, E. Matthias, & T. Szorenyi (Eds.), Applied Surface Science (Vol. 109-110)