2 research outputs found
Preparation of Few-Layer MoS<sub>2</sub> Nanosheets via an Efficient Shearing Exfoliation Method
In this paper, we selected a less
studied high-speed dispersive
homogenizer as a shear-exfoliating device and selected NMP which matches
the surface energy of MoS<sub>2</sub> as a solvent to prepare few-layer
MoS<sub>2</sub> nanosheets. The effects of operating parameters on
the concentration of few-layer MoS<sub>2</sub> nanosheets were systematically
studied. The results showed that the change of operating conditions
has a direct influence on the exfoliation effects. The concentration
of MoS<sub>2</sub> nanosheets was 0.96 mg/mL in pure NMP under the
optimized conditions. The concentration reached 1.44 mg/mL, and the
highest yield was 4.8% after adding sodium citrate. Particularly,
their lateral size is about 50–200 nm, in which almost 65%
of MoS<sub>2</sub> nanosheets are less than four layers and 9% are
monolayer. It was verified that the as-used exfoliation method is
simple and highly efficient
3D-Printed Photocurable Resin with Synergistic Hydrogen Bonding Based on Deep Eutectic Solvent
Vat
polymerization, one of the 3D printing technologies, has been
widely applied owing to its advantageous properties, such as high
accuracy and surface quality. However, the applicability of this technology
is limited to end-use product manufacturing, requiring advancements
due to a gradual increase in the performance requirements and functional
demands of the products. In this study, deep eutectic solvent-based
photocurable resins (PCRs) with synergistic hydrogen bonding are synthesized
using a facile and ecofriendly procedure to tune monomer proportions.
The as-prepared PCRs, with ultralow viscosity and ultrahigh curing
rate, are compatible with commercial liquid-crystal display printers.
The 3D-printed parts with high optical transparency, stiffness, and
thermal resistance exhibit humidity-dependent electrical conductivity
and mechanical properties. In addition, the 3D-printed objects demonstrate
self-healing features due to the synergistic effect of high-density
hydrogen bonding in the microphase-separated polymer matrix. Moreover,
different categories of structural assembly, from 2D to 3D and small
to large, are demonstrated, and their solubility ensued in recycling
and remolding. The synthesized PCRs are suitable for fabricating sacrificial
molds, enabling the on-demand fabrication of precise multifunctional
structures with various materials, which are otherwise incompatible
with UV-based 3D printing, facilitating 3D printing by overcoming
its material-selection limitations