Highly active, entirely biobased antimicrobial Pickering emulsions

ChemMedChem. 2021 Mar 18. doi: 10.1002/cmdc.202100030. Online ahead of print.


We present the development of surfactant-free, silica-free and fully biobased oil-in-water antimicrobial Pickering emulsions, based on the self-assembly of b -cyclodextrin and phytoantimicrobial oils (terpinen-4-ol or carvacrol). Undecylenic acid (UA), derived from castor oil, can be used as bio-based drug to treat fungal infection, but is less effective than petroleum-based drugs as azole derivatives. To maximize its antifungal potential, we have incorporated UA in fully biobased Pickering emulsions. These emulsions are effective against fungi, Gram-positive and Gram-negative bacteria. The carvacrol emulsion charged with UA is +390 % and +165 % more potent against methicillin-resistant S. aureus (MRSA), compared to UA and azole-based commercial formulations. Moreover, this emulsion is up to +480 % more efficient that UA ointment against C. albicans . Finally, remarkable eradication of E. coli and MRSA biofilms was obtained with this environmental-friendly emulsion.

PMID:33735940 | DOI:10.1002/cmdc.202100030