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  Graphitic carbon nitride stabilizers meet microfluidics: from stable emulsions to photoinduced synthesis of hollow polymer spheres

Yandrapalli, N., Robinson, T., Antonietti, M., & Kumru, B. (2020). Graphitic carbon nitride stabilizers meet microfluidics: from stable emulsions to photoinduced synthesis of hollow polymer spheres. Small, 2001180. doi:10.1002/smll.202001180.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-B1DD-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-B1DE-8
Genre: Journal Article

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 Creators:
Yandrapalli, Naresh1, Author              
Robinson, Tom1, Author              
Antonietti, Markus2, Author              
Kumru, Baris3, Author              
Affiliations:
1Tom Robinson, Theorie & Bio-Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2288691              
2Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              
3Bernhard Schmidt, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2149676              

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Free keywords: carbon nitrides, double emulsions, hollow spheres, microfluidics, Pickering emulsions
 Abstract: Graphitic carbon nitride (g‐CN) has been utilized as a heterogeneous catalyst, but is usually not very well dispersible. The amphiphilic character of g‐CN can be altered by surface modifications of g‐CN nanopowders. Introducing hydrophilicity or hydrophobicity is a promising avenue for producing advanced emulsion systems. In this study, a special surface‐modified g‐CN is used to form stable Pickering emulsions. Using a PDMS‐based microfluidic device designed for stable production of both single and double emulsions, it is shown that surface‐modified g‐CNs allow the manufacture of unconventionally stable and precise Pickering emulsions. Shell thickness of the double emulsions is varied to emphasize the robustness of the device and also to demonstrate the extraordinary stabilization brought by the surface‐modified carbon nitride used in this study. Due to the electrostatic stabilization also in the oil phase, double emulsions are centered. Finally, when produced from polymerizable styrene, hollow polymer microparticles are formed with precise and tunable sizes, where g‐CN is utilized as the only stabilizer and photoinitiator.

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 Dates: 2020-07-02
 Publication Status: Published in print
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 Identifiers: DOI: 10.1002/smll.202001180
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Title: Small
  Other : Small
Source Genre: Journal
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Publ. Info: Weinheim, Germany : Wiley-VCH
Pages: - Volume / Issue: - Sequence Number: 2001180 Start / End Page: - Identifier: ISSN: 1613-6810