期刊
CARBOHYDRATE POLYMERS
卷 173, 期 -, 页码 392-402出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.06.007
关键词
Layer-by-layer assembly; Poly-l-lysine; Carnauba wax; Textile; Cellulose nanofibril films; Hydrophobicity
资金
- Aalto Energy Efficiency Research Programme through the Wood Life Project
- Academy of Finland [278279]
- Academy of Finland (AKA) [278279, 278279] Funding Source: Academy of Finland (AKA)
Herein we present a simple method to render cellulosic materials highly hydrophobic while retaining their breathability and moisture buffering properties, thus allowing for their use as functional textiles. The surfaces are coated via layer-by-layer deposition of two natural components, cationic poly-l-lysine and anionic carnauba wax particles. The combination of multiscale roughness, open film structure, and low surface energy of wax colloids, resulted in long-lasting superhydrophobicity on cotton surface already after two bilayers. Atomic force microscopy, interference microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy were used to decouple structural effects from changes in surface energy. Furthermore, the effect of thermal annealing on the coating was evaluated. The potential of this simple and green approach to enhance the use of natural cellulosic materials is discussed. (C) 2017 Elsevier Ltd. All rights reserved.
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