Contact Angle Measurements on Smooth Nanocrystalline Cellulose (I) Thin Films

被引:83
作者
Dankovich, Theresa A. [1 ]
Gray, Derek G. [1 ]
机构
[1] McGill Univ, Dept Chem Pulp & Paper Bldg, Montreal, PQ H3A 2A7, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Nanocellulose; contact angle; cellulose; thin films; model surfaces; INTERFACIAL-TENSIONS; SURFACE-PROPERTIES; WATER; ADHESION;
D O I
10.1163/016942410X525885
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Interactions of cellulose fiber surfaces with water and other liquids depend on surface morphology as well as intrinsic material properties. Smooth nanocrystalline cellulose (I) films can be used as models to study surface phenomena, where the effects of surface morphology and roughness are minimized. Contact angle measurements are particularly sensitive to surface roughness. In this work, we measured the advancing and receding contact angles for water on thin model cellulose (I) and regenerated cellulose (II) films. The advancing and receding contact angles on model cellulose (I) surfaces were lower than on cellulose (II) surfaces, and the contact angle hysteresis was also lower for the smooth model cellulose (I) surfaces prepared from nanocrystal suspensions. The surface free energy was evaluated for the various cellulose surfaces from contact angle measurements. (C) Koninklijke Brill NV, Leiden, 2011
引用
收藏
页码:699 / 708
页数:10
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