Surface properties of distinct nanofibrillated celluloses assessed by inverse gas chromatography

摘要: Abstract The adhesion and surface properties of nanocelluloses are an important issue to consider when using this material for composites production, in food packaging or coatings, as well determining the influence added functional groups. In present work, two nanofibrillated celluloses obtained by mild 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated oxidation with distinct mechanical treatment intensity a homogenizer (5 15 passes), one cellulose enzymatic process, were thoroughly assessed inverse chromatography, at infinite dilution conditions. dispersion component energy ( γ s d ) was 42–46 mJ m−2 40 °C TEMPO nanofibres 52 mJ m−2 nanocellulose. It confirmed, based on determination specific components works enthalpies adsorption polar probes, that surfaces materials have more Lewis acidic than basic character. Regarding nanofibres, slight increase acidity/basicity ratio seemed occur (15-passes). Higher interactions probes found higher values observed nanocellulose could partly be due crystallinity sample. On other hand, (as value) 15-passes versus 5-passes attributed exposition hydroxyl groups former material.