| Autor: |
Simon Utsel, Emil Gustafsson, Andrew Marais, Lars Wågberg |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Carbohydrate Polymers. 100:218-224 |
| ISSN: |
0144-8617 |
| DOI: |
10.1016/j.carbpol.2013.03.049 |
| Popis: |
The Layer-by-Layer technique was used to build a polyelectrolyte multilayer on the surface of pulp fibres. The treated fibres were then used to prepare paper sheets and the mechanical properties of these sheets were evaluated as a function of the number of bi-layers on the fibres. Two different systems were studied: polyethyleneimine (PEI)/nanofibrillated cellulose (NFC), and polyallylamine hydrochloride (PAH)/hyaluronic acid (HA). Model experiments using dual polarization interferometry and SiO₂ surfaces showed that the two systems gave different thicknesses for a given number of layers. The outer layer was found to be a key parameter in the PEI/NFC system, whereas it was less important in the PAH/HA system. The mechanical properties of the sheets made from the PAH/HA treated fibres were significantly greater than those made from untreated fibres, reaching 70 Nm/g in tensile index and 6.5% in strain at break. Such a modification could be very useful for 3D forming of paper, opening new perspectives in for example the packaging industry, with a renewable and biodegradable product as a potential substitute for some of the traditional oil-based plastics. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect