Adaptive Structured Pickering Emulsions and Porous Materials Based on Cellulose Nanocrystal Surfactants

Yanan Li, Xubo Liu, Zhen Zhang, Shaojie Zhao, Guifang Tian, Jinkai Zheng, Dong Wang, Shaowei Shi, Thomas P. Russell

Research output: Contribution to journalArticlepeer-review

99 Scopus citations

Abstract

Taking advantage of the formation and assembly of cellulose nanocrystal surfactants (CNCSs) at the water–oil interface, where polar cellulose nanocrystals (CNCs) and end-functionalized polymer chains interact, the preparation and stability of emulsions prepared with CNCSs were investigated. The packing density of CNCSs at the interface can be adjusted by tuning parameters such as pH, ionic strength, and concentration/molecular weight of the end-functionalized polymer ligands. Stable non-spherical emulsions are obtained during homogenization, as a result of the interfacial jamming of CNCSs, with pH-triggered reconfigurability. Porous materials are prepared by freeze-drying creamed, CNCS-stabilized emulsions. The cells of the porous materials have a controlled pore size and shape that are commensurate with the droplets in the emulsion and are responsive to pH. The behavior of the adaptive, reconfigurable supracolloidal system is coupled to its internal and surrounding environment.

Original languageEnglish
Pages (from-to)13560-13564
Number of pages5
JournalAngewandte Chemie - International Edition
Volume57
Issue number41
DOIs
StatePublished - 8 Oct 2018
Externally publishedYes

Keywords

  • cellulose nanocrystal surfactants
  • Pickering emulsions
  • porous materials
  • structured liquids

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