Modulation of cellulose nanocrystals amphiphilic properties to stabilize oil/water interface.

Abstract:

:Neutral cellulose nanocrystals dispersed in water were shown in a previous work to stabilize oil/water interfaces and produce Pickering emulsions with outstanding stability, whereas sulfated nanocrystals obtained from cotton did not show interfacial properties. To develop a better understanding of the stabilization mechanism, amphiphilic properties of the nanocrystals were modulated by tuning the surface charge density to investigate emulsifying capability on two sources of cellulose: cotton linters (CCN) and bacterial cellulose (BCN). This charge adjustment made it possible to determine the conditions where a low surface charge density, below 0.03 e/nm(2), remains compatible with emulsification, as well as when assisted by charge screening regardless of the source. This study discusses this ability to stabilize oil-in-water emulsions for cellulose nanocrystals varying in crystalline allomorph, morphology, and hydrolysis processes related to the amphiphilic character of nonhydrophobized cellulose nanocrystal.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Kalashnikova I,Bizot H,Cathala B,Capron I

doi

10.1021/bm201599j

subject

Has Abstract

pub_date

2012-01-09 00:00:00

pages

267-75

issue

1

eissn

1525-7797

issn

1526-4602

journal_volume

13

pub_type

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