Biomimetic composites of deuterated bacterial cellulose and hemicelluloses studied with small-angle neutron scattering

Paavo A. Penttilä*, Tomoya Imai, Junji Sugiyama, Ralf Schweins

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Composites mimicking the plant-cell wall structure were prepared by synthesizing deuterated bacterial cellulose in D-based culture medium including hemicelluloses from wood. The partial intracrystalline deuteration of bacterial cellulose was demonstrated by FT-IR spectra, which also showed that the hemicelluloses modified the cellulose crystal structure in both the water-accessible and water-inaccessible parts of the fibrils. The hierarchical wet-state structure of the composites was characterized using small-angle neutron scattering (SANS) and the cross-sectional fibril dimensions were compared to scanning electron microscopy images of freeze-dried samples and earlier small-angle X-ray scattering results from hydrogenated samples. The SANS data of deuterated bacterial cellulose/hemicellulose composites revealed a decrease of the microfibril cross-section and looser packing of the microfibrils into wider bundles in the presence of hemicelluloses.

Original languageEnglish
Pages (from-to)177-183
Number of pages7
JournalEuropean Polymer Journal
Volume104
DOIs
Publication statusPublished - Jul 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Bacterial cellulose
  • Deuteration
  • Hemicellulose
  • Small-angle neutron scattering

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