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04-07-2019 | Original Research | Issue 12/2019 Open Access

Cellulose 12/2019

Cellulose carbamate derived cellulose thin films: preparation, characterization and blending with cellulose xanthate

Journal:
Cellulose > Issue 12/2019
Authors:
Michael Weißl, Mathias Andreas Hobisch, Leena Sisko Johansson, Kay Hettrich, Eero Kontturi, Bert Volkert, Stefan Spirk
Important notes

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s10570-019-02600-z) contains supplementary material, which is available to authorized users.

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Abstract

Cellulose carbamate (CC) was employed as a water-soluble precursor in the manufacturing of cellulose based thin films using the spin coating technique. An intriguing observation was that during spin coating of CC from alkaline aqueous solutions, regeneration to cellulose was accomplished without the addition of any further chemicals. After rinsing, homogeneous thin films with tunable layer thickness in a range between 20 and 80 nm were obtained. Further, CC was blended with cellulose xanthate in different ratios (3:1, 1:1, 1:3) and after regeneration the properties of the resulting all-cellulose blend thin films were investigated. We could observe some slight indications of phase separation by means of atomic force microscopy. The layer thickness of the blend thin films was nearly independent of the ratio of the components, with values between 50 and 60 nm for the chosen conditions. The water uptake capability (80–90% relative to the film mass) determined by H2O/D2O exchange in a quartz crystal microbalance was independent of the blend ratio.

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Supplementary Material
Supplementary material 1 (DOCX 3730 kb)
10570_2019_2600_MOESM1_ESM.docx
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