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/11375/27449
Full metadata record
DC FieldValueLanguage
dc.contributor.advisorBrook, Michael-
dc.contributor.authorBui, Robert-
dc.date.accessioned2022-04-12T20:06:06Z-
dc.date.available2022-04-12T20:06:06Z-
dc.date.issued2022-
dc.identifier.urihttp://hdl.handle.net/11375/27449-
dc.description.abstractThis thesis explores the use of amine-functionalized silicone oils with various aliphatic and aromatic aldehydes as a novel method of crosslinking functional silicone materials via imines and the application of the resulting materials. These reactions overcome many of the drawbacks of traditional methods for crosslinking silicones and produces materials with novel properties that can enable their use in different applications. Furthermore, the differences in reactivity between the two types of aldehydes lead to two unique crosslinking motifs. Aromatic aldehydes produce conjugated Schiff-base crosslinks, while the crosslinking with aliphatic aldehydes undergoes various condensation reactions to give novel silicone materials. The use of small aliphatic aldehydes such as formaldehyde, glutaraldehyde, and glyoxal was found to rapidly crosslink aminopropylsilicones into elastomeric materials. The high reactivity of the aldehyde towards the amine-moieties also allows for robust crosslinking into elastomers that can occur even in the presence of water, a remarkable feature for silicones that are normally water insoluble. These properties allowed for the application of the material as an ink for 3-D printing, where the rapid crosslinking allowed for the study of a novel free-space droplet merging printing method. Silicone materials crosslinked with aromatic aldehydes produce conjugated Schiff-base bonds. These crosslinks can undergo dynamic exchange reactions in the presence of an amine catalyst to alter bonding in the material. These reactions gave the silicone chemoplastic and thermoplastic properties, allowing the material to be remoulded and reprocessed. Naturally-derived aromatic aldehydes can also be used as the crosslinker, allowing for a multi-faceted approach to increasing the sustainability of silicone materials by increasing their utility, making them reprocessable, thus extending their lifespan while using sustainable materials as a filler.en_US
dc.language.isoenen_US
dc.subjectSiliconeen_US
dc.subjectMaterialsen_US
dc.titleUsing Amines and Aldehydes as a Novel Crosslinking Method for Silicone Materialsen_US
dc.typeThesisen_US
dc.contributor.departmentChemistry and Chemical Biologyen_US
dc.description.degreetypeThesisen_US
dc.description.degreeDoctor of Science (PhD)en_US
Appears in Collections:Open Access Dissertations and Theses

Files in This Item:
File Description SizeFormat 
Bui_Robert_K_2022March_PhD.pdf
Open Access
5.52 MBAdobe PDFView/Open
Show simple 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