Excimer laser induced surface photochemical reaction of 1,2-diaminoethane with poly(tetrafluoroethylene)

Károly Révész, B. Hopp, Z. Bor

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Poly(tetrafluoroethylene) (PTFE or Teflon) is notable for its nonadhesive and nonreactive character. Successful surface photochemical modification of Teflon using liquid 1,2-diaminoethane and λ = 193 nm ArF excimer laser light was demonstrated. The surfaces were analyzed by X-ray photoelectron spectroscopy (XPS), atomic force microscopy, and liquid contact angle and gluing tensile strength measurements. Due to the photomodification the originally poor adhesive property of the PTFE surface was dramatically improved. Surfaces were glued by epoxy resin and the tensile strength of gluing increased by 150 times over that of the unirradiated samples. The surface was metalized electrolessly with silver on selected areas following patterned phototreatment. As a result of the photochemical reaction, hydrophilic and oleophilic property developed on the surfaces at the same time. The water and benzene contact angles decreased from 94° to 40° and from 31° to 0°, respectively. The removal of fluorine and the incorporation of both alkyl groups and nitrogen were identified on XPS spectra. The reaction cross section was determined from water contact angle and XPS results. It was found to be as high as (1.3-1.6) × 10-17 cm2. A radical or a photoinduced electron transfer mechanism is suggested to describe the photoreaction.

Original languageEnglish
Pages (from-to)5593-5601
Number of pages9
JournalLangmuir
Volume13
Issue number21
Publication statusPublished - Oct 15 1997

Fingerprint

ethylenediamine
polytetrafluoroethylene
Photochemical reactions
Excimer lasers
Polytetrafluoroethylenes
photochemical reactions
excimer lasers
Polytetrafluoroethylene
Contact angle
Gluing
X ray photoelectron spectroscopy
teflon (trademark)
photoelectron spectroscopy
tensile strength
Tensile strength
Epoxy Resins
x rays
Fluorine
Water
Liquids

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Excimer laser induced surface photochemical reaction of 1,2-diaminoethane with poly(tetrafluoroethylene). / Révész, Károly; Hopp, B.; Bor, Z.

In: Langmuir, Vol. 13, No. 21, 15.10.1997, p. 5593-5601.

Research output: Contribution to journalArticle

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