Skip navigation
  • Home
  • Browse
    • Communities
      & Collections
    • Browse Items by:
    • Publication Date
    • Author
    • Title
    • Subject
    • Department
  • Sign on to:
    • My MacSphere
    • Receive email
      updates
    • Edit Profile


McMaster University Home Page
  1. MacSphere
  2. Open Access Dissertations and Theses Community
  3. Open Access Dissertations and Theses
Please use this identifier to cite or link to this item: http://hdl.handle.net/11375/15402
Title: THE ADHESION OF POLY(DIMETHYL SILOXANE) TO SILICA SUBSTRATES
Authors: Yu, Lunquan
Advisor: Pelton, Robert
Department: Chemical Engineering
Keywords: Adhesion;POLY(DIMETHYL SILOXANE);SILICA SUBSTRATES
Publication Date: 2014
Abstract: The adhesion of poly(dimethyl siloxane) (PDMS) to silica substrates was measured by 90 degree peel testing of PDMS strips cast on silica substrates. The objective of this work was to investigate the effects of silica surface chemistry on the adhesion between PDMS and silica substrate. Silica substrates with different surface chemistry were prepared by both chemical modification and physical adsorption. Silane coupling agents were used to provide octyl chains and primary amino groups on the silica surfaces. Also silica surfaces were coated with cetyltrimethylammonium bromide (CTAB), polyvinylamine (PVAm) or poly(N-isopropylacrylamide) (PNIPAM) by physical adsorption. The adhesion samples were prepared by casting Sylgard® 184 silicone elastomers on silica surfaces followed by thermal curing. Water contact angle measurements, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared microscopy (FTIR) were performed to measure the surface properties of the peel test samples. It is believed that hydrogen bonding between siloxane bonds in PDMS and silanol groups on silica substrate contributes to the strong adhesion of PDMS and silica surface. The adhesion forces significantly reduced by the adsorption of PVAm and PNIPAM onto silica surfaces. In addition, the introduction of primary amino groups on silica surface would poison the catalyst during the curing of PDMS, which causes the formation of low crosslinking PDMS in the outer surface and is expected to decline the adhesion force. Lastly, the slightly reduce of adsorbed PVAm (340 kDa) on the silica substrate after peel test is considered to be useful for long-term lubrication.
URI: http://hdl.handle.net/11375/15402
Appears in Collections:Open Access Dissertations and Theses

Files in This Item:
File Description SizeFormat 
Lunquan Yu MASc Thesis.pdf
Open Access
Main article1.38 MBAdobe PDFView/Open
Show full item record Statistics


Items in MacSphere are protected by copyright, with all rights reserved, unless otherwise indicated.

Sherman Centre for Digital Scholarship     McMaster University Libraries
©2022 McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8 | 905-525-9140 | Contact Us | Terms of Use & Privacy Policy | Feedback

Report Accessibility Issue