2 research outputs found
Aesthetic Cellulose Filaments with Water-Triggered Switchable Internal Stress and Customizable Polarized Iridescence Toward Green Fashion Innovation
Healthy,
convenient, and aesthetic hair dyeing and styling
are
essential to fashion trends and personal–social interactions.
Herein, we fabricate green, scalable, and aesthetic regenerated cellulose
filaments (ACFs) with customizable iridescent colors, outstanding
mechanical properties, and water-triggered moldability for convenient
and fashionable artificial hairdressing. The fabrication of ACFs involves
cellulose dissolution, cross-linking, wet-spinning, and nanostructured
orientation. Notably, the cross-linking strategy endows the ACFs with
significantly weakened internal stress, confirmed by monitoring the
offset of the C–O–C group in the cellulose molecular
chain with Raman imaging, which ensures a tailorable orientation of
the nanostructure during wet stretching and tunable iridescent polarization
colors. Interestingly, ACFs can be tailored for three-dimensional
shaping through a facile water-triggered adjustable internal stress:
temporary shaping with low-level internal stress in the wet state
and permanent shaping with high-level internal stress in the dry state.
The health, convenience, and green aesthetic filaments show great
potential in personal wearables
Robust Guar Gum/Cellulose Nanofibrils Multilayer Films with Good Barrier Properties
The
pursuit of sustainable functional materials requires development
of materials based on renewable resources and efficient fabrication
methods. Hereby, we fabricated all-polysaccharides multilayer films
using cationic guar gum (CGG) and anionic cellulose nanofibrils (i.e.,
TEMPO-oxidized cellulose nanofibrils, TOCNs) through a layer-by-layer
casting method. This technique is based on alternate depositions of
oppositely charged water-based CGG and TOCNs onto laminated films.
The resultant polyelectrolyte multilayer films were transparent, ductile,
and strong. More importantly, the self-standing films exhibited excellent
gas (water vapor and oxygen) and oil barrier performances. Another
outstanding feature of these resultant films was their resistance
to various organic solvents including methanol, acetone, <i>N</i>,<i>N</i>-dimethylacetamide (DMAc) and tetrahydrofuran
(THF). The proposed film fabrication process is environmentally benign,
cost-effective, and easy to scale-up. The developed CGG/TOCNs multilayer
films can be used as a renewable material for industrial applications
such as packaging