Progress on Cellulose Esterification – Control Over Surface to Bulk Modification

Tetyana Koso, Marco Beaumont, Alistair King (Corresponding author)

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific


The industrial acetylation of high-purity technical cellulosics is well studied mechanistically and known to involve elementary fibril chain exfoliation, leading to cellulose triacetate (CTA) for-mation Sassi, & Chanzy, 1995). The biodegradability of such materials, in the context of the single-use plastics di-rective, are justifiably under scrutiny, which is very much related to the increased hydrophobicity of high DS cellulose acetates (Yadav, & Hakkarainen, 2021).

Recently we developed two methods that allow for fine control over the regioselectivity of sur-face acetylation of different cellulose substrates (Koso et al., 2022, Beaumont et al., 2021). One method involves the controlled sur-face modification of dried cellulose substrates, e.g. nanocelluloses, pulps & regenerated fibres (Koso et al., 2022). Another, takes advantage of the novel properties of surfacebound water and mechanical ac-tivation to yield a thorough penetration of the fibre network, yet, still maintaining high regiose-lectivity (confinement of reaction to fibril surfaces). These methods are especially illustrated through the combined application of a novel solution-state NMR method, high resolution AFM and WAXS. The regioselectivity results are also supported by DFT-based transition-state model-ling on a cellulose surface fragment.
Original languageEnglish
Title of host publicationNWBC 2022
Subtitle of host publicationThe 10th Nordic Wood Biorefinery Conference
EditorsAtte Virtanen, Katariina Torvinen, Jessica Vepsäläinen
PublisherVTT Technical Research Centre of Finland
Number of pages1
ISBN (Electronic)978-951-38-8772-8
Publication statusPublished - 2022
MoE publication typeNot Eligible
Event10th Nordic Wood Biorefinery Conference, NWBC 2022 - Helsinki, Finland
Duration: 25 Oct 202227 Oct 2022
Conference number: 10

Publication series

SeriesVTT Technology


Conference10th Nordic Wood Biorefinery Conference, NWBC 2022
Abbreviated titleNWBC 2022


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