Nanyang technological university: experimenting with acoustic nozzles to disrupt clogging in 3d printing

Nanyang Technological College: Experimenting with Acoustic Nozzles to Disrupt Clogging in 3D Printing


Thesis pupil, Yannapol Sriphutkiat, of the College of Mechanical and Aerospace Engineering at Nanyang Technological College lately revealed, ‘Improvement of acoustic nozzle for 3D printing,’ exploring using acoustic vibrations to unravel one of the vital widespread issues: clogging.

As with so many inventions and enhancements allowed by means of 3D printing, all of it makes excellent sense—utilizing acoustics to govern microparticles and forestall clogging. For this examine, Sriphutkiat researched using standing floor acoustic waves (SSAWs) in microchannels to scale back the problem.

Correct alignment of printing supplies within the nozzle and elimination of clogging results in a greater consequence not just for 3D printing total, however particularly in bioprinting practices because it limits cell density within the materials. Whereas there are quite a few challenges in bioprinting, clogging is one that also confounds and thwarts researchers:

“Suspensions are prone to sediment and mixture within the cell reservoir, tube and nozzle of the printing system, the sedimentation reduces the width of the circulate path which can additionally result in clogging inside the slender geometry of the inkjet nozzle. The clogging may considerably enhance the traditional stress and shear stress utilized to the cells, which can lower the cell viability and proliferation fee, and reduce formation of nonuniform droplet sizes of bioink,” acknowledged the researchers.

The schematic of clogging mechanism

Though clogging continues to be a thriller in some ways, on this examine, researchers are optimistic about using vibration as an answer for each stability in manufacturing and discount of clogging too. The general concept of such a method is to ‘disturb the clogging habits,’ which frequently appears to happen across the entrance of the pore throats, after which fully blocking or bridging the realm.

“SSAWs transfer microparticles away from the wall, in the direction of the middle of the microchannel, and due to this fact, scale back the prospect of microparticle accumulation/clogging,” acknowledged the researchers, who employed dual-frequency excitation for the SSAWs, for higher management.

The acoustic nozzle precipitated cells to build up towards the middle of a cylindrical tube within the lab, permitting for achievement in 3D printing, with tuning of SSAWs reducing the width of amassed microparticles.

Schematic diagram of SSAW consisting of (a) PDMS-LiNbO3 and (b) superstrateLiNbO3

“Compared to the standard printing technique, acoustic excitation may considerably scale back the width of amassed microparticles within the printed construction (p < zero.05). As well as, the microparticle movement excited at greater harmonics (385 kHz and 657 kHz) was additionally studied,” acknowledged the researchers.

The examine continued efficiently with bioprinting because the researchers noticed C2C12 cells being managed by the acoustics. As soon as printed, they have been studied for every week. The cells uncovered to acoustic excitation amassed close to the middle of the nozzle, whereas cells from the management group have been scattered. Acoustically manipulated cells additionally confirmed extra ‘vital dense cell construction,’ whereas the management group cells have been nonetheless extra chaotic.

“Total, the acoustic method is ready to accumulate microparticles/cells within the printed assemble at a low price, easy configuration, and low energy, however excessive biocompatibility,” concluded the researchers. “Sooner or later, acoustic patterning of varied organic cell varieties in printed assemble may very well be investigated. As acoustic technique has a functionality to govern the microparticle/organic cells relying on their bodily properties (compressibility, density and measurement).

Sound has performed a task in quite a few 3D printing methods, from the event of acoustic metamaterials to implanting gadgets with sound knowledge, and even 3D printed symphonies. Discover out extra about how improvements corresponding to acoustic nozzles can enhance the 3D printing course of right here. What do you consider this information? Tell us your ideas! Be part of the dialogue of this and different 3D printing matters at

Schematic diagram of experimental setup.

[Source / Images: Development of acoustic nozzle for 3D printing]

Credit score : Supply Hyperlink

Related posts

Leave a Comment