Study by XPS of an Atmospheric Plasma-Torch Treated Glass: Influence on Adhesion Articles uri icon

publication date

  • January 2010

start page

  • 1841

end page

  • 1854

issue

  • 11-12

volume

  • 24

International Standard Serial Number (ISSN)

  • 0169-4243

Electronic International Standard Serial Number (EISSN)

  • 1568-5616

abstract

  • In many buildings, a continuous glass closure is employed to cover external aluminium profiles, leaving a complete glass façade. To obtain such a structural glazing, a silicone material is generally used. This
    research has studied silicone-glass adhesion, and the influence of
    atmospheric plasma treatments on this adhesion. Two different fully
    transparent silicone materials have been used: neutral silicone (usually
    used as sealant) and acid silicone (used as adhesive) for glass
    applications.The plasma treatments were carried out at two
    different speeds (10 and 1 m/min), and the surfaces were studied by
    X-ray Photoelectron Spectroscopy (XPS). Moreover, the change in surface
    with time after treatment (up to 7 days) was also evaluated. Silicone
    was cured on the glass for 7 days before mechanical testing. Adhesion
    tests were carried out for both untreated and treated glasses following
    ASTM D 4541 standard procedure to measure the bond strength.In the glass, two different bonds are present: Si-O− (non-bridging oxygen bond) and Si-O-Si (bridging oxygen bond), and these were characterized using the Si2p, Si2s, and O1s
    XPS peaks. With plasma treatment, the relative percentages of these
    bonds change, with increase in the amount of bridging oxygen bonds.
    Adhesion tests showed a reduction in bond strength in treated glasses.