Mixing and flow-induced nanoprecipitation for morphology control of silk fibroin self-assembly

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
16 Downloads (Pure)


Tuning silk fibroin nanoparticle morphology using nanoprecipitation for bottom-up manufacture is an unexplored field that has the potential to improve particle performance characteristics. The aim of this work was to use both semi-batch bulk mixing and micro-mixing to modulate silk nanoparticle morphology by controlling the supersaturation and shear rate during nanoprecipitation. At flow rates where the shear rate was below the critical shear rate for silk, increasing the concentration of silk in both bulk and micro-mixing processes resulted in particle populations of increased sphericity, lower size, and lower polydispersity index. At high flow rates, where the critical shear rate was exceeded, the increased supersaturation with increasing concentration was counteracted by increased rates of shear-induced assembly. The morphology could be tuned from rod-like to spherical assemblies by increasing supersaturation of the high-shear micro-mixing process, thereby supporting a role for fast mixing in the production of narrow-polydispersity silk nanoparticles. This work provides new insight into the effects of shear during nanoprecipitation and provides a framework for scalable manufacture of spherical and rod-like silk nanoparticles.
Original languageEnglish
Pages (from-to)7357-7373
Number of pages17
JournalRSC Advances
Issue number12
Early online date4 Mar 2022
Publication statusPublished - 4 Mar 2022


  • mixing
  • flow-induced nanoprecipitation
  • morphology control
  • silk fibroin
  • self-assembly


Dive into the research topics of 'Mixing and flow-induced nanoprecipitation for morphology control of silk fibroin self-assembly'. Together they form a unique fingerprint.

Cite this