CP/MAS C-13 NMR study of pulp hornification using nanocrystalline cellulose as a model system
Journal article, 2013

The hornification process of paper pulp was investigated using solid-state C-13 NMR spectroscopy. Nanocrystalline cellulose was used to serve as a model system of the crystalline parts of the fibrils in pulp fibers. Characterization of the nanocrystalline cellulose dimensions was carried out using scanning electron microscopy. The samples were treated by drying and wetting cycles prior to NMR analysis where the hornification phenomenon was recorded by spectral changes of the cellulose C-4 carbon signals. An increase of the crystalline signal and a decrease of the signals corresponding to the accessible amorphous domains were found for both paper pulp and nanocrystalline cellulose. These spectral changes grew stronger with repeating drying and wetting cycles. The results show that cellulose co-crystallization contribute to hornification. Another conclusion is that the surfaces of higher hydrophobicity in cellulose fibrils have an increased preference for aggregation.


Solid-state NMR


C-13 NMR






Fibril aggregation

Paper pulp

Nanocrystalline cellulose

kraft pulp


Alexander Idström

SuMo Biomaterials

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

H. Brelid

Södra Innovation

Magnus Nydén

University of South Australia

Lars Nordstierna

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 92 1 881-884

Subject Categories

Paper, Pulp and Fiber Technology



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