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Cellulose nanocrystals for high internal phase emulsion (hipe) stabilization

Abstract : We have demonstrated that high internal phase emulsions (HIPE) can be obtained by mixing dispersed cellulose nanocrystals (CNCs) and oil. This is, however, possible only when a dilute Pickering emulsion is first prepared. The two-step process is made possible by the irreversible nature of CNC adsorption at the oil/water interface. Additional oil promotes swelling of the drops without phase inversion. Drop size is then driven by the CNC coverage ratio at the droplet surface, induced by a limited coalescence process. This process leads to a new interfacial networking organization. This study reveals a dual property of rod-shaped CNCs at the interface: i) possibility of dynamic displacement and ii) cooperative self-association leading to a percolating aggregate network. We have thereby demonstrated the possibility of obtaining oil as a gel stabilized by a pure cellulosic material.
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https://hal.inrae.fr/hal-02642260
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Submitted on : Thursday, May 28, 2020 - 6:11:44 PM
Last modification on : Thursday, January 13, 2022 - 3:12:02 PM

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  • HAL Id : hal-02642260, version 1
  • PRODINRA : 288952
  • WOS : 000345678900006

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Isabelle Capron, Fanch Cherhal, Gisela Guedes Nunes da Cunha, Bernard Cathala. Cellulose nanocrystals for high internal phase emulsion (hipe) stabilization. Journal of Science and Technology for Forest Products and Processes, 2013, 3 (4), pp.35 - 37. ⟨hal-02642260⟩

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