Mechanical and Barrier Properties of Cardboard and 3D Packaging Coated with Microfibrillated Cellulose

被引:74
作者
Lavoine, Nathalie [1 ]
Bras, Julien [1 ]
Desloges, Isabelle [1 ]
机构
[1] Grenoble INP Pagora, LGP2, UMR CNRS 5518, F-38402 St Martin Dheres, France
关键词
packaging; nanoparticles; nanowires and nanocrystals; mechanical properties; coatings; cellulose and other wood products; TEMPO-MEDIATED OXIDATION; PHYSICAL-PROPERTIES; FILMS; TRANSPARENT;
D O I
10.1002/app.40106
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Microfibrillated cellulose (MFC) is increasingly used with cellulosic substrates and especially with paper materials. Its use with cardboard remains not reported and the study of mechanical and barrier properties of MFC-coated cardboard has been investigated in this article. The influence of coating process as well as the effect of MFC have been highlighted by comparing different MFC-coated cardboard samples with PE-coated cardboard samples. MFC was coated using bar coating process. Their distribution and homogeneity onto cardboard was observed using techniques such as SEM and FE-SEM. Tests such as oxygen and air permeability, bending stiffness, and compressive strength have been carried out. The coating process used impacts significantly cardboard properties by two opposite ways: on one hand it damages the structure cohesion of cardboard decreasing its compressive strength; on the other hand it increases its bending stiffness by increasing considerably the samples thickness. The addition of MFC counterbalances the negative effects of the coating process: bending stiffness and compressive strength are indeed improved by 30% in machine direction. On the contrary, MFC does not enhance much cardboard barrier properties, although it considerably increases their water absorption. Within a framework of packaging application, MFC will rather have consequent effects on cardboard's properties as blend or as part of the multilayer structure. Other applications have to be considered for its use as top layer. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40106.
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页数:11
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