2 research outputs found

    Preparation of Few-Layer MoS<sub>2</sub> Nanosheets via an Efficient Shearing Exfoliation Method

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    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

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    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
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