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Two representative hemicelluloses, xylan and konjac glucomannan (KGM), were composited with 2,2,6,6-tetramethylpiperidine-1-oxyl radical-oxidized cellulose nanofibers (CNF), endowing the CNF-based nanocomposite films with enhanced strength, flexibility and UV blocking properties. Particularly, xylan and KGM were separately or simultaneously mixed with a CNF dispersion to obtain three kinds of CNF-based...
Partially deacetylated chitin nanofibers (PD-ChNFs) with different degrees of deacetylation (DDA: 16%, 29%, 38%, 47%) that represented different amino group contents were prepared by partial deacetylation treatment under the desired conditions and the subsequent mechanical treatment. Higher concentration of NaOH or treating for longer time will result a higher DDA. An equation for the calculation...
A physical composite nanochitin/microemulsion (NCh/ME) hydrogel for a prolonged release of hydrophobic compounds (drugs) under in vitro physiological conditions was investigated. A strong physical hydrogel was prepared by an alkali gas phase coagulation bath composting NCh with an oil in water ME in which a hydrophobic dye, Nile Red (NR), was embedded to simulate a drug release process. Different...
A layer deposition method was developed to prepare a series of nanocellulose/filter paper (NC/FP) composite filtration membranes by vacuum filtration of an aqueous nanocellulose dispersion on a filter paper substrate. The deposited NC networks and the final pore structure of the NC/FP composite were affected by the size and the amount of the nanocellulose. Drying methods further influenced the filtration...
The partially deacetylated α-chitin nanofiber/nanowhisker (DEChN) aqueous dispersions were prepared by alkali deacetylation. The following mechanical treatment under acidic conditions was mediated by five different organic protonic acids, including acetic acid, gluconic acid, itaconic acid, citric acid and ascorbic acid. Thereafter, these acidic DEChN dispersions were transformed into hydrogels under...
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