Hydrophobization and smoothing of cellulose nanofibril films by cellulose ester coatings

被引:37
作者
Willberg-Keyrilainen, Pia [1 ]
Vartiainen, Jari [1 ]
Pelto, Jani [2 ]
Ropponen, Jarmo [1 ]
机构
[1] VTT Tech Res Ctr Finland Ltd, POB 1000, FI-02044 Espoo, Finland
[2] VTT Tech Res Ctr Finland Ltd, POB 1300, FI-33101 Tampere, Finland
关键词
Cellulose nanofibrils; CNF; Long chain cellulose esters; Multilayer films; Barrier; BARRIER PROPERTIES; COMPOSITE;
D O I
10.1016/j.carbpol.2017.04.082
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The Cellulose nanofibrils (CNF), also referred to as nanocellulose, is one of the most studied bio-based material in recent year, which has good potential in the future for packaging applications due to its excellent mechanical strength and oxygen barrier properties. In the future, CNF films may also find new applications for example in printed electronics, if the surface smoothness of CNF films can be improved. One way to improve surface smoothness is to use thin coating solutions with zero porosity, such as molar mass controlled cellulose ester coatings. In this study, we have coated CNF films using molar mass controlled cellulose esters with different side chain lengths forming 3-layer film (ester-CNF-ester). These coatings improved significantly the smoothness of CNF films. The 3-layer films have also good water vapor barrier and mechanical properties and the films are heat-sealable, which enable various new applications in the future. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:160 / 165
页数:6
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