3 years ago

Simple Preparation of Thiol–Ene Particles in Glycerol and Surface Functionalization by Thiol–Ene Chemistry (TEC) and Surface Chain Transfer Free Radical Polymerization (SCT-FRP)

Simple Preparation of Thiol–Ene Particles in Glycerol and Surface Functionalization by Thiol–Ene Chemistry (TEC) and Surface Chain Transfer Free Radical Polymerization (SCT-FRP)
Anders E. Daugaard, Liyun Yu, Valeria Chiaula, Christian Hoffmann, John M. Woodley, Manuel Pinelo
Thiol–ene (TE)-based polymer particles are traditionally prepared via emulsion polymerization in water (using surfactants, stabilizers, and cosolvents). Here, a green and simple alternative is presented with excellent control over particle size, while avoiding the addition of stabilizers. Glycerol is applied as a dispersing medium for the preparation of off-stoichiometric TE microparticles, where sizes in the range of 40–400 µm are obtained solely by changing the mixing speed of the emulsions prior to crosslinking. Control over surface chemistry is achieved by surface functionalization of excess thiol groups via photochemical thiol–ene chemistry resulting in a functional monolayer. In addition, surface chain transfer free radical polymerization is used for the first time to introduce a thicker polymer layer on the particle surface. The application potential of the system is demonstrated by using functional particles as adsorbent for metal ions and as a support for immobilized enzymes. A simple and fast process for the preparation of off-stoichiometric thiol–ene particles in glycerol without stabilizers or cosolvents is demonstrated. Particle sizes are controlled solely by changing mixing speeds. Versatile surface modification via thiol–ene chemistry or surface chain transfer free radical polymerization demonstrates the introduction of various functional groups and selectively changes the extent of grafting thickness.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/marc.201700394

You might also like
Never Miss Important Research

Researcher is an app designed by academics, for academics. Create a personalised feed in two minutes.
Choose from over 15,000 academics journals covering ten research areas then let Researcher deliver you papers tailored to your interests each day.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.