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A series of high dielectric composite films based on low-cost and eco-friendly titanium dioxide (TiO2) and cellulose nanofibril (CNF) was prepared under a facile condition. The relative dielectric constants (εr) and dielectric loss ( $$ \tan\updelta $$ tan δ ) were studied as the function of frequency and filler content. The εr of CNF/TiO2 composite film was 19.51 (at 1 kHz) with a relatively...
Highly transparent films with excellent gas barriers are very attractive materials for electronic devices. However, gas barrier properties of conventional cellulose nanofibril films tend to degrade under humid conditions. It is a great challenge to obtain nanocellulose films that simultaneously have very low gas permeability, high transparency, and high moisture and water resistance. In this study,...
Here, we reported a new type of water expandable polystyrene (WEPS) beads containing cellulose nanofibrils (CNFs). This expansible material, called CNFWEPS, showed the highest expansion ratio (~16) for the as-synthesized beads and ~8 after 4.5 months, which has never been reported in the literature. Expandable beads containing 9–13wt% of the well-dispersed water were synthesized through Pickering...
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