Matching low viscosity with enhanced conductivity for vat 3D printing resin filled with carbon nanotubes

Matching low viscosity with enhanced conductivity for vat 3D printing resin filled with carbon nanotubes

Abstrakt

Additive manufacturing (AM) represents various technologies used to build 3D objects layer-by-layer. This innovative technique offers unique advantages over traditional manufacturing methods, such as facile customization, adaptability, the ability to create complicated designs, streamline production processes, and reduce material waste. The AM market is growing remarkedly quickly on a global scale, driving further advancements in this dynamic field. Alongside the developments in AM, interest in 3D-printed complex functional structures has grown significantly in numerous areas, including biological and chemical applications, electronics, and wearable devices. Conductive materials are among the most intensively researched functional materials. One way to fabricate conductive materials is the 3D printing of nanocomposites filled with carbon-based nanofillers due to their dielectric, electrical, thermal, and mechanical characteristics. This work aimed to prepare highly efficient nanocomposites filled with multi-walled carbon nanotubes (MWCNTs) designed for vat photopolymerization (VP) 3D printing technology. Since the presence of nanoparticles (NPs) and their distribution within polymer matrix critically affect not only the functional properties but also the behaviour of nanocomposites, the study's main goal was to prepare formulations that combine good conductivity with good printability. The enhanced electrical properties were closely tied to the filler-matrix affinity. It favoured the enhanced dispersion of MWCNTs in a compatible matrix above their percolation threshold. On the other hand, well-dispersed filler worsens the material's ability to flow and may lead to defects during 3D printing. Nonetheless, the electrical and rheological percolation points were discovered at different filler concentrations. This disparity allows the preparation of systems with enhanced conductivity while maintaining their processability through vat 3D printing. This work was supported by the Internal Grants of BUT (Specific Research) Reg. No. BD622415000. CzechNanoLab project LM2018110, funded by MEYS CR, is gratefully acknowledged for the financial support of the measurements at CEITEC Nano Research Infrastructure.

Additive manufacturing (AM) represents various technologies used to build 3D objects layer-by-layer. This innovative technique offers unique advantages over traditional manufacturing methods, such as facile customization, adaptability, the ability to create complicated designs, streamline production processes, and reduce material waste. The AM market is growing remarkedly quickly on a global scale, driving further advancements in this dynamic field. Alongside the developments in AM, interest in 3D-printed complex functional structures has grown significantly in numerous areas, including biological and chemical applications, electronics, and wearable devices. Conductive materials are among the most intensively researched functional materials. One way to fabricate conductive materials is the 3D printing of nanocomposites filled with carbon-based nanofillers due to their dielectric, electrical, thermal, and mechanical characteristics. This work aimed to prepare highly efficient nanocomposites filled with multi-walled carbon nanotubes (MWCNTs) designed for vat photopolymerization (VP) 3D printing technology. Since the presence of nanoparticles (NPs) and their distribution within polymer matrix critically affect not only the functional properties but also the behaviour of nanocomposites, the study's main goal was to prepare formulations that combine good conductivity with good printability. The enhanced electrical properties were closely tied to the filler-matrix affinity. It favoured the enhanced dispersion of MWCNTs in a compatible matrix above their percolation threshold. On the other hand, well-dispersed filler worsens the material's ability to flow and may lead to defects during 3D printing. Nonetheless, the electrical and rheological percolation points were discovered at different filler concentrations. This disparity allows the preparation of systems with enhanced conductivity while maintaining their processability through vat 3D printing. This work was supported by the Internal Grants of BUT (Specific Research) Reg. No. BD622415000. CzechNanoLab project LM2018110, funded by MEYS CR, is gratefully acknowledged for the financial support of the measurements at CEITEC Nano Research Infrastructure.

Vat-photopolymerization 3D printing, dielectric properties, electrical properties, carbon nanotubes

Vat-photopolymerization 3D printing, dielectric properties, electrical properties, carbon nanotubes

SEVRIUGINA, V.; LEPCIO, P.; ONDREÁŠ, F.

01.09.2024