Adsorption and interfacial structure of nanocelluloses at fluid interfaces.,Advances in Colloid and Interface Science

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Adsorption and interfacial structure of nanocelluloses at fluid interfaces.
Advances in Colloid and Interface Science ( IF 15.9 ) Pub Date : 2019-12-20 , DOI: 10.1016/j.cis.2019.102089
Pascal Bertsch ₁ , Peter Fischer ₁

Affiliation

Nanocelluloses (NCs), more specifically cellulose nanocrystals and nanofibrils, are a green alternative for the stabilization of fluid interfaces. The adsorption of NCs at oil-water interfaces facilitates the formation of stable and biocompatible Pickering emulsions. In contrast, unmodified NCs are not able to stabilize foams. As a consequence, NCs are often hydrophobized by covalent modifications or adsorption of surfactants, allowing also the stabilization of foams or functional inverse, double, and stimuli-responsive emulsions. Although the interfacial stabilization by NCs is readily exploited, the driving force of adsorption and stabilization mechanisms remained long unclear. Here, we summarize the recent advances in the understanding of NC adsorption regarding kinetics, isotherms, and energetic aspects, as well as their interfacial structure, surface coverage, and contact angle. We thereby distinguish unmodified NCs, covalently modified NCs, and surfactant enhanced adsorption.

中文翻译：

纳米纤维素在流体界面的吸附和界面结构。

纳米纤维素（NCs），更具体地说是纤维素纳米晶体和纳米原纤维，是稳定流体界面的绿色替代品。NCs在油水界面上的吸附有助于形成稳定且生物相容的Pickering乳液。相反，未改性的NCs不能稳定泡沫。因此，NCs通常通过表面活性剂的共价改性或吸附来疏水化，从而还可以稳定泡沫或功能性反相，双重和刺激性乳液。尽管很容易利用NC进行界面稳定化，但长期以来尚不清楚吸附和稳定化机理的驱动力。在这里，我们总结了关于NC吸附的动力学，等温线和高能方面及其界面结构的最新进展，表面覆盖率和接触角。因此，我们区分未修饰的NCs，共价修饰的NCs和表面活性剂增强的吸附。

更新日期：2019-12-20

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