Characterization of an Amphiphilic Janus-Type Surface in the Cellulose Nanofibril Prepared by Aqueous Counter Collision,Biomacromolecules

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Characterization of an Amphiphilic Janus-Type Surface in the Cellulose Nanofibril Prepared by Aqueous Counter Collision
Biomacromolecules ( IF 5.5 ) Pub Date : 2021-01-08 , DOI: 10.1021/acs.biomac.0c01464
Tsubasa Tsuji _{1,

2} , Kunio Tsuboi ₂ , Shingo Yokota ₁ , Satomi Tagawa ₁ , Tetsuo Kondo ₁

Affiliation

Cellulose nanofibrils, which attract extensive attention as a bio-based, sustainable, high-performance nanofibril, are believed to be predominantly hydrophilic. This study aimed to prove the presence of an amphiphilic “Janus-type fiber surface” in water with hydrophobic and hydrophilic faces in a cellulose nanofibril (ACC-CNF) that was prepared by the aqueous counter collision method. We clarified the surface characteristics of the ACC-CNF by confocal laser scanning microscopy with a carbohydrate-binding module and congo red probes for the hydrophobic planes on the cellulose fiber surfaces and calcofluor white as hydrophilic plane probes. The results indicated the presence of both characteristic planes on a single ACC-CNF surface, which verifies an amphiphilic Janus-type structure. Both hydrophobic probes adsorbed onto ACC-CNFs for the quantitative evaluation of the degree of ACC-CNF surface hydrophobicity by Langmuir’s adsorption theory based on the optimal maximum adsorption amounts for various starting raw material types.

中文翻译：

水对撞制备纤维素纳米原纤维中两亲Janus型表面的表征。

纤维素纳米纤维作为一种基于生物的，可持续的，高性能的纳米纤维引起了广泛的关注，据信主要是亲水的。这项研究的目的是证明通过水相反冲方法制备的纤维素纳米原纤维（ACC-CNF）中具有疏水和亲水表面的两亲性“ Janus型纤维表面”。我们通过共聚焦激光扫描显微镜与碳水化合物结合模块和刚果红探针对纤维素纤维表面上的疏水平面和钙氟白作为亲水平面探针，通过共聚焦激光扫描显微镜阐明了ACC-CNF的表面特性。结果表明在单个ACC-CNF表面上同时存在两个特征平面，这证实了两亲性Janus型结构。

更新日期：2021-02-08

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