Application Example | Application of Adventure Technology Direct Writing Equipment in Electromagnetic Interference Material Research

Industry new knowledge

Recently, the team led by Professor Zhang Haobin and Professor Min Peng of beijing university of chemical technology published a research entitled High-Precision Printing of Flexible MXene Patterns for Dynamically Tunable Electromagnetic Applied Materials Interfaces in ACS Interference Shielding & Performance. They studied the method of preparing flexible MXene patterns by high-precision printing technology and realizing its dynamically adjustable electromagnetic interference (EMI) shielding performance. The straight 3D printing equipment used this time is provided by Adventure Technology.

Original link: https://pubs.acs.org/doi/10.1021/acsami.3c18943

Adventure Technology official website: http://www.adventuretech.cn/

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research content

The article first introduces the importance of electromagnetic interference (EMI) shielding materials, especially in the application of intelligent electronic devices. With the complexity and diversification of electronic devices, the demand for EMI shielding materials is also increasing. However, most of the current EMI shielding materials are passive and cannot meet the needs of dynamic regulation. Therefore, the main challenge facing researchers is how to dynamically adjust the interaction between the material and the electromagnetic wave through external stimulation.

In order to solve this problem, the research team proposed a strategy to prepare flexible MXene patterns with customizable structures through precise printing technology. Specifically, they used MXene inks containing metal ions (such as Al³/), which can adjust the rheological properties of the ink to meet printing requirements. This study uses a direct-write 3D printing device (ADT-3D-LB-Printer-0050) independently developed by Adventure Technology to perform high-precision printing work. Using this MXene ink and advanced printing technology, the researchers printed a flexible structure with high conductivity, and achieved dynamic adjustability of EMI shielding effect through stress adjustment.

△ Figure 1,(a) Schematic diagram of Al³-MXene ink printing. (B) A schematic diagram of the interaction between Al³ Ion and MXene nanosheets and a digital image of Al³-MXene ink. (c) Printing a digital image of the structure. (d) Printing a digital image of the flexible conductive path. The scale bar in FIGS. 1b-d is 1cm.

△ Figure 2,(a) The preparation process of printable Al³-MXene ink. (B) TEM and elemental mapping images of Al³-MXene sheets. (c-e) XPS spectra of MXene and Al³-MXene. (f) XRD patterns of MXene and Al³-MXene. (g) Viscosity and (h) modulus of MXene dispersion and Al³-MXene ink.

Figure 3,(a) SEM image of the printed periodic line. (B), (c) The corresponding width distribution and variation of printing. (d) SEM images of different width prints. (e) SEM image of the printed morphology. (f) The relationship between the print film thickness and the number of prints. (g) The relationship between the conductivity of the MXene film and the number of prints. (h) Print schematic diagram of square antenna. (I) Print a digital image of the square antenna on the PI.

4,(a) Schematic diagram of printed MXene grid. (B) Digital images of a series of printed MXene grids. (c) Experimental and simulated EMI SE of MXene grid. (D, e) Simulate the energy distribution of electric fields in different power grids. (f) EMISE of the MXene grid (8.2 − 40 GHz). (g) Normalized EMI SE of MXene grids in cyclic bending tests.

△ Figure 5,(a) schematic diagram of three-layer structure printing. (B) Print the Unmasked/masked switchable mask performance simulation. (c) Stretchable printed digital images. (d) Average EMI SE of different tensile strain prints at 8.2-12.4 GHz. (e) Print the periodicity of the "unmasked/masked" state. (f) Environmental stability of printing.

research conclusion

By using MXene ink and high-precision printing technology, researchers have not only successfully developed flexible and customizable EMI shielding materials, but also realized the dynamic adjustability of its shielding performance. This research provides new ideas for the development of smart shielding materials, especially in electronic devices that require flexible and adjustable shielding in the future, this technology may have a wide range of applications.

From a technical point of view, the MXene material itself has excellent conductivity and good dispersion, making it very suitable as a substrate for printing inks. By introducing metal ions, the researchers successfully solved the contradiction between the rheological properties of the ink and the printing requirements, making high-precision printing possible. This technology not only has potential applications in EMI shielding, but can also be extended to other areas that require sophisticated structures and functions.

In short, this study demonstrates the great potential of the combination of MXene materials and printing technology, and provides an important reference for the development of smart materials in the future.

The direct-write 3D printing equipment used in the article is described as follows