Related Experiment Video
Updated: Oct 8, 2025
09:02
Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
Published on: July 9, 2015
12.4K
Thiol-Functional Polymer Nanoparticles via Aerosol Photopolymerization
Narmin Suvarli1, Iris Perner-Nochta1, Jürgen Hubbuch1
1Institute of Process Engineering in Life Science, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany.
Polymers
|December 28, 2021
Summary
Researchers created spherical polymer nanoparticles with thiol groups using aerosol photopolymerization. This method enables fast synthesis of cross-linked networks for further functionalization.
Area of Science:
- Polymer Chemistry
- Materials Science
- Nanotechnology
Background:
- Functional nanoparticles are crucial for various applications.
- Aerosol photopolymerization (APP) offers a rapid method for nanoparticle synthesis.
- Thiol-ene chemistry provides a versatile platform for creating polymer networks.
Purpose of the Study:
- To synthesize spherical polymer nanoparticles with accessible functional thiol (-SH) groups.
- To investigate the compatibility of different thiol and alkene monomers with APP.
- To optimize nanoparticle properties for post-polymerization modification.
Main Methods:
- Utilized aerosol photopolymerization (APP) with radically initiated thiol-ene chemistry.
- Explored various combinations of di-, tri-, and tetrafunctional thiols with difunctional allyl/vinyl ethers and trifunctional acrylates.
- Analyzed nanoparticle morphology using scanning electron microscopy (SEM) and verified thiol group presence with Ellman's test.
Main Results:
- Successfully synthesized spherical, individual polymer nanoparticles.
- Identified that only monomer combinations forming cross-linked poly(thio-ether) networks were compatible with APP's rapid polymerization requirement.
- Higher monomer functionalities and balanced stoichiometry yielded optimal nanoparticle characteristics.
- Confirmed the presence of reactive -SH groups on the nanoparticle surface.
Conclusions:
- Aerosol photopolymerization is effective for synthesizing functional thiol-containing polymer nanoparticles.
- Cross-linked poly(thio-ether) networks are essential for successful APP synthesis.
- The synthesized nanoparticles are suitable for post-polymerization modification due to their accessible -SH groups.
