Tuning the Porosity, Water Interaction, and Redispersion of Nanocellulose Hydrogels by Osmotic Dehydration

Valentina Guccini (Corresponding Author), Josphat Phiri, Jon Trifol, Ville Rissanen, Seyede Maryam Mousavi, Jaana Vapaavuori, Tekla Tammelin, Thaddeus Maloney, Eero Kontturi (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Osmotic dehydration (OD) was introduced as a method to reproducibly tune the water content and porosity of cellulose nanofiber (CNF) hydrogels. The hierarchical porosity was followed by electron microscopy (pores with a >100 μm diameter) and thermoporosimetry (mesopores), together with mechanical testing, in hydrogels with solid contents ranging from 0.7 to 12 wt %. Furthermore, a reciprocal correlation between proton conductivity and the ratio of water bound to the nanocellulose network was established, suggesting the potential of these systems toward tunable energy materials.

Original languageEnglish
Pages (from-to)24-28
JournalACS Applied Polymer Materials
Volume4
Issue number1
DOIs
Publication statusPublished - 14 Jan 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • cellulose nanofibers
  • controlled water removal
  • ion conductivity
  • redispersion
  • thermoporosimetry

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