One-step production of highly anisotropic particles via a microfluidic method

Ming Xia, Eun Min Go, Kyu Hwan Choi, Jin Hyun Lim, Bumkyo Park, Taekyung Yu, Sang Hyuk Im, Sang Kyu Kwak, Bum Jun Park

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We introduce a promising protocol that can be used to fabricate polymer particles with a high degree of shape anisotropy; this method can be utilized with a variety of microfluidic generation methods. Low-density microparticles and high-density nanoparticles vertically migrated in a polymer solution confined in emulsion droplets that were produced via a microfluidic method. As the solvent evaporated in individual droplets at ambient conditions, the low-density microparticles migrated upward because their density was lower than that of the polymer solution. The high-density nanoparticles that were initially well-dispersed in the droplet phase became destabilized upon solvent removal, leading to the formation of aggregates and sedimentation in a downward direction. The migration of the particle components during solvent evaporation induced shape deformation/modification of the emulsion droplets; consequently, polymer particles with highly anisotropic shapes were created after drying.

Original languageEnglish
Pages (from-to)328-336
Number of pages9
JournalJournal of Industrial and Engineering Chemistry
Volume64
DOIs
Publication statusPublished - 2018 Aug 25

Bibliographical note

Funding Information:
This work was supported by grants from Kyung Hee University ( KHU-20141582 ) and the National Research Foundation (NRF) of Korea, funded by the Korea government (MSIP) ( NRF-2017R1A2B4003123 and NRF-2014R1A5A1009799 ). Computational resources were from HPC at UNIST, South Korea and KISTI ( KSC-2017-C3-0044 ).

Publisher Copyright:
© 2018 The Korean Society of Industrial and Engineering Chemistry

Keywords

  • Anisotropy
  • Interface
  • Microfluidics
  • Nanoparticles
  • Phase separation

ASJC Scopus subject areas

  • General Chemical Engineering

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