Publications

@article{nokey,

title = {3D-Printed Monoliths Based on Cu-Exchanged SSZ-13 as Catalyst for SCR of NOx},

author = {E. Cepollaro and S. Cimino and M. D'Agostini and N. Gargiulo and G. Franchin and L. Lisi},

doi = {10.3390/catal14010085},

year  = {2024},

date = {2024-01-19},

urldate = {2024-01-19},

journal = {Catalysts},

volume = {14},

number = {85},

issue = {1},

abstract = {Monoliths manufactured by Direct Ink Writing containing 60% SSZ-13 (SiO2/Al2O3 = 23) and SiO2 with 10% laponite as a binder were investigated as self-standing structured catalysts for NH3-SCR of NOx after a short (4 h) and prolonged (24 h) ion exchange with copper and then compared with pure SSZ-13 exchanged under the same conditions. The catalysts were characterized by morphological (XRD and SEM), textural (BET and pore size distribution), chemical (ICP-MS), red-ox (H2-TPR), and surface (NH3-TPD) analyses. The silica-based binder uniformly covered the SSZ-13 particles, and copper was uniformly distributed as well. The main features of the pure Cu-exchanged SSZ-13 zeolite were preserved in the composite monoliths with a negligible contribution of the binder fraction. NH3-SCR tests, carried out on both monolithic and powdered samples in the temperature range of 70–550 °C, showed that composite monoliths provided very good activity, and that the intrinsic activity of SSZ-13 was enhanced by the hierarchical structure of the composite material.},

keywords = {Additive Manufacturing, Materials for the environment},

pubstate = {published},

tppubtype = {article}

}

@article{HUANG2024104051,

title = {UV-assisted Robotic Arm Freeforming of SiOC Ceramics from a Preceramic Polymer},

author = {K. Huang and A. De Marzi and G. Franchin and P. Colombo},

url = {https://www.sciencedirect.com/science/article/pii/S2214860424000976},

doi = {https://doi.org/10.1016/j.addma.2024.104051},

issn = {2214-8604},

year  = {2024},

date = {2024-01-01},

urldate = {2024-01-01},

journal = {Additive Manufacturing},

pages = {104051},

abstract = {Material extrusion is a very common and facile additive manufacturing technique for ceramic materials, allowing for rapid design and fabrication of 3D structures without expensive tools. However, fabricating sophisticated structures with large spanning parts and overhanging features using this technology is still a challenge. Here, UV-assisted additive manufacturing is enabled by performing material extrusion with the assistance of UV light using mixture of a preceramic polymer and a photopolymer. The rheological properties of the ink were investigated under UV light radiation to optimize the printing parameters to achieve excellent printability. Complex ceramic structures were fabricated with this method, such as spiral and truss structures, which would be very difficult to obtain using traditional material extrusion without sacrificial supports. These structures have potential application in lightweight ceramic components, such as sandwich structures.},

keywords = {Additive Manufacturing, Polymer-derived ceramics},

pubstate = {published},

tppubtype = {article}

}

@article{Biasetto2023,

title = {Ink Tuning for Direct Ink Writing of Planar Metallic Lattices},

author = {L. Biasetto and A. Gleadall and V. Gastaldi},

doi = {10.1002/adem.202201858},

issn = {1527-2648},

year  = {2023},

date = {2023-10-00},

urldate = {2023-10-00},

journal = {Adv Eng Mater},

volume = {25},

number = {20},

publisher = {Wiley},

abstract = {316L and Cu‐based inks are developed to 3D‐printed tetrachiral auxetic structures. The main objectives of the work are to study the effects of powders composition and powder:binder volume ratio on rheological properties and printability of the inks. Following these results, customized Gcode is developed using FullControl Gcode Designer open‐source software to 3D print intricate tetrachiral auxetic structures. The results reported in this work show how powder composition (316L versus Cu) has less effect on the inks’ rheological behavior than powder size distribution and powders:binder volume ratio. In terms of rheological parameters, the zero‐shear rate viscosity mainly affects the capability of the printed ink to retain its shape after printing, while the yield stress affects the printability. The printed and sintered auxetic structures achieve the intended lattice‐geometry design.},

keywords = {Additive Manufacturing},

pubstate = {published},

tppubtype = {article}

}

@article{BHANDARI2023,

title = {Ultra-rapid debinding and sintering of additively manufactured ceramics by ultrafast high-temperature sintering},

author = {S. Bhandari and C. Maniere and F. Sedona and E. De Bona and V. M. Sglavo and P. Colombo and L. Fambri and M. Biesuz and G. Franchin},

url = {https://www.sciencedirect.com/science/article/pii/S0955221923006660},

doi = {https://doi.org/10.1016/j.jeurceramsoc.2023.08.040},

issn = {0955-2219},

year  = {2023},

date = {2023-08-25},

urldate = {2023-01-01},

journal = {Journal of the European Ceramic Society},

abstract = {In recent years, additive manufacturing (AM) of ceramics has significantly advanced in terms of the range of equipment available, printing resolution and productivity. Most techniques involve the use of ceramic powders embedded in an organic binder which is typically removed through a slow thermal debinding process. Herein, we prove for the first time that ultra-rapid debinding and sintering are possible for complex 3YSZ components produced using material extrusion technology. The printed components were first chemically debinded in acetone thus removing about one-half of the binder, and then thermally debinded and sintered by ultrafast high-temperature sintering (UHS) in a single-step process (30 to 120s). Fully dense components were obtained with tailored microstructure and nanometric grain size. The sintered artefacts were crack-free even at the microscopic level. This approach paves the way for rapid processing (debinding and sintering) of additively manufactured ceramics with reduced energy consumption and carbon footprint.},

keywords = {Additive Manufacturing},

pubstate = {published},

tppubtype = {article}

}

@article{SHEZAD2023e19376,

title = {3D-printed zeolite 13X-Strontium chloride units as ammonia carriers},

author = {N. Shezad and M. D'Agostini and A. Ezzine and G. Franchin and P. Colombo and F. Akhtar},

url = {https://www.sciencedirect.com/science/article/pii/S2405844023065842},

doi = {https://doi.org/10.1016/j.heliyon.2023.e19376},

issn = {2405-8440},

year  = {2023},

date = {2023-08-22},

urldate = {2023-08-22},

journal = {Heliyon},

pages = {e19376},

abstract = {The selective catalytic reduction (SCR) system in automobile using urea solution as a source of NH3 suffer from solid deposit problem in pipe lines and poor efficiency during engine startup. Although direct use of high pressure NH3 is restricted due to safety concern, which can be overcome by using solid sorbents as NH3 carrier. Strontium chloride (SrCl2) is considered the best sorbent due to its high sorption capacity; however, challenges are associated with the processing of stable engineering structures due to extraordinary volume expansion during the NH3 sorption. This study reports the fabrication of a novel structure consisting of a zeolite cage enclosing the SrCl2 pellet (SPZC) through extrusion-based 3D printing (Direct Ink Writing). The printed SPZC structure demonstrated steady sorption of NH3 for 10 consecutive cycles without significant uptake capacity and structural integrity loss. Furthermore, the structure exhibited improved sorption and desorption kinetics than pure SrCl2. The synergistic effect of zeolite as physisorbent and SrCl2 as chemisorbent in the novel composite structure enabled the low-pressure (<0.4 bar) and high-pressure (>0.4 bar) NH3 sorption, compared to pure SrCl2, which absorbed NH3 at pressures above 0.4 bar. Regeneration of SPZC composite sorbent under evacuation showed that 87.5% percent of NH3 was desorbed at 20 °C. Thus, the results demonstrate that the rationally designed novel SPZC structure offers safe and efficient storage of NH3 in the SCR system and other applications.},

keywords = {Additive Manufacturing, Materials for the environment},

pubstate = {published},

tppubtype = {article}

}

@article{pmid37262160,

title = {Improving glass nanostructure fabrication},

author = {P. Colombo and G. Franchin},

url = {https://www.science.org/stoken/author-tokens/ST-1233/full},

doi = {10.1126/science.adi2747},

issn = {1095-9203},

year  = {2023},

date = {2023-06-01},

urldate = {2023-06-01},

journal = {Science},

volume = {380},

number = {6648},

pages = {895--896},

abstract = {A new method offers high-resolution three-dimensional printing and low-temperature firing.},

keywords = {Additive Manufacturing, Polymer-derived ceramics},

pubstate = {published},

tppubtype = {article}

}

@article{Sponchiado2023,

title = {Modeling Materials Coextrusion in Polymers Additive Manufacturing},

author = {R. Sponchiado and S. Rosso and P. Dal Fabbro and L. Grigolato and H. Elsayed and E. Bernardo and M. Maltauro and F. Uccheddu and R. Meneghello and G. Concheri and G. Savio},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146542047&doi=10.3390%2fma16020820&partnerID=40&md5=8f6d4fd9281c8e12d6011070909a93c1},

doi = {10.3390/ma16020820},

year  = {2023},

date = {2023-01-01},

journal = {Materials},

volume = {16},

number = {2},

keywords = {Additive Manufacturing},

pubstate = {published},

tppubtype = {article}

}

@article{Elsayed2023131,

title = {Direct ink writing of silicone/filler mixtures for sphene scaffolds with advanced topologies},

author = {H. Elsayed and L. Grigolato and G. Savio and P. Colombo and E. Bernardo},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85136591063&doi=10.1111%2fijac.14168&partnerID=40&md5=0f6d944d98d2c53ca6f38bcf1cc75927},

doi = {10.1111/ijac.14168},

year  = {2023},

date = {2023-01-01},

journal = {International Journal of Applied Ceramic Technology},

volume = {20},

number = {1},

pages = {131--140},

keywords = {Additive Manufacturing},

pubstate = {published},

tppubtype = {article}

}

@article{Morais2023,

title = {Additive manufacturing of calcium carbonate parts through vat-photopolymerization and sintering in carbon dioxide atmosphere},

author = {M. M. Morais and I. L. D. Camargo and P. Colombo and C. A. Fortulan},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85150826481&doi=10.1016%2fj.oceram.2023.100348&partnerID=40&md5=d163bef392a3abd7e199ab4957714c81},

doi = {10.1016/j.oceram.2023.100348},

year  = {2023},

date = {2023-01-01},

journal = {Open Ceramics},

volume = {14},

keywords = {Additive Manufacturing},

pubstate = {published},

tppubtype = {article}

}

@article{Ma2023510,

title = {3D-printed Lunar regolith simulant-based geopolymer composites with bio-inspired sandwich architectures},

author = {S. Ma and Y. Jiang and S. Fu and P. He and C. Sun and X. Duan and D. Jia and P. Colombo and Y. Zhou},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149784582&doi=10.26599%2fJAC.2023.9220700&partnerID=40&md5=5545c234bdfa4a13c1c5051aebfe1a79},

doi = {10.26599/JAC.2023.9220700},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Journal of Advanced Ceramics},

volume = {12},

number = {3},

pages = {510--525},

keywords = {Additive Manufacturing, Materials for the environment},

pubstate = {published},

tppubtype = {article}

}

@article{Li2023,

title = {Enhanced mechanical properties of 3D printed alumina ceramics by using sintering aids},

author = {H. Li and H. Elsayed and P. Colombo},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85156210231&doi=10.1016%2fj.ceramint.2023.05.025&partnerID=40&md5=ae047c3add9ffb5ab26c85ecdaae2bb6},

doi = {10.1016/j.ceramint.2023.05.025},

year  = {2023},

date = {2023-01-01},

journal = {Ceramics International},

keywords = {Additive Manufacturing},

pubstate = {published},

tppubtype = {article}

}

@article{DeMarzi2023,

title = {Development of robot assisted hybrid additive manufacturing technology for the freeform fabrication of lattice structures},

author = {A. De Marzi and M. Vibrante and M. Bottin and G. Franchin},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148960460&doi=10.1016%2fj.addma.2023.103456&partnerID=40&md5=4a445c3f21991572b69adac9a4d48139},

doi = {10.1016/j.addma.2023.103456},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Additive Manufacturing},

volume = {66},

keywords = {Additive Manufacturing},

pubstate = {published},

tppubtype = {article}

}

@article{FENG2023,

title = {Enhanced electromagnetic microwave absorption properties of SiCN(Fe) ceramics produced by additive manufacturing via in-situ reaction of ferrocene},

author = {Y. Feng and X. Guo and H. Elsayed and K. Huang and G. Franchin and G. Motz and Y. Tong and H. Gong and P. Colombo},

url = {https://www.sciencedirect.com/science/article/pii/S0272884223012828},

doi = {https://doi.org/10.1016/j.ceramint.2023.05.035},

issn = {0272-8842},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Ceramics International},

abstract = {SiCN(Fe) ceramics with excellent electromagnetic wave (EMW) absorption performance were successfully prepared from a preceramic polymer doped with ferrocene. Additive manufacturing (Digital Light Processing), providing enhanced structural design ability, was employed to fabricate samples with complex architectures. During pyrolysis, ferrocene catalyzed the in-situ formation of a large amount of turbostratic carbon, graphite and SiC nanosized phases, which formed carrier channels in the electromagnetic field and increased the conductivity loss. Meanwhile, it also increased the dipole polarization, interface polarization and the dielectric properties of the material, which finally enhanced the EMW absorption capacity of SiCN(Fe) ceramics. When containing 0.5 wt% ferrocene, the material showed good performance with EAB 4.57 GHz at 1.30 mm, and RLmin −61.34 dB at 2.22 mm. The RLmin of 3D-SiCN-0.5 ceramics was −6 dB, and the RL of the X-band was lower than −4 dB at 2 mm.},

keywords = {Additive Manufacturing, Polymer-derived ceramics},

pubstate = {published},

tppubtype = {article}

}

@article{BREDA2023,

title = {Production and mechanical characterization of Titanium Carbide ISOL target disks fabricated by direct ink writing},

author = {A. Breda and A. Zanini and A. Campagnolo and S. Corradetti and M. Manzolaro and G. Meneghetti and P. Colombo and M. Ballan and G. Franchin},

url = {https://www.sciencedirect.com/science/article/pii/S0272884223020485},

doi = {https://doi.org/10.1016/j.ceramint.2023.07.121},

issn = {0272-8842},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Ceramics International},

abstract = {Titanium carbide boasts a large variety of high-temperature applications from aerospace to electronics and is also employed as Isotope Separation On-Line target for the production of Radioactive Ion Beams, which are employed in numerous research and technological fields, ranging from nuclear physics to medical applications. High working temperature, open and tailored porosity and resistance to thermal stresses are fundamental characteristics for this kind of targets. In this work, an extrusion-based additive manufacturing technique (Direct Ink Writing) was used for the fabrication of complex three-dimensional macro-porous structures in the shape of disks with dimensions compatible for their use as targets. An ink containing a suspension of TiC powders with solid loading of 47.5 vol% was prepared and its rheological properties were investigated. Afterwards, single filaments with an average diameter of 0.36 mm were produced and characterized with four-point bending tests to determine the bulk material tensile strength and Young's modulus. TiC targets were then manufactured and their mechanical properties were characterized with the Ball on Three Balls approach, a biaxial flexural test suitable for disk-shaped samples. For both flexural tests, a Finite Element model was developed representatively reproducing the experimental results. The calculated tensile strength values for both filaments and disks were analyzed with Weibull's statistical approach to provide reference stress limit, corresponding to a survival probability of 99.9%.},

keywords = {Additive Manufacturing},

pubstate = {published},

tppubtype = {article}

}

@article{FRANCHIN2022100012,

title = {Additive Manufacturing of Ceramics from Liquid Feedstocks},

author = {G. Franchin and H. Elsayed and R. Botti and K. Huang and J. Schmidt and G. Giometti and A. Zanini and A. De Marzi and M. D'Agostini and P. Scanferla and Y. Feng and P. Colombo},

url = {https://www.sciencedirect.com/science/article/pii/S2772665722000022},

doi = {https://doi.org/10.1016/j.cjmeam.2022.100012},

issn = {2772-6657},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Chinese Journal of Mechanical Engineering: Additive Manufacturing Frontiers},

volume = {1},

number = {1},

pages = {100012},

abstract = {In this review, we summarize the research activities carried out by our research group at the University of Padova on the additive manufacturing of ceramics from liquid feedstocks. Particularly, we evaluate the use of preceramic polymers, geopolymers, and sol-gel solutions. We mainly focus on processing with liquid feedstocks because they have some advantages with respect to slurry-based feedstocks in which powders are present. Particularly, lower viscosity, enhanced transparency, and lack of scattering and sedimentation are advantageous features for vat photopolymerization processes, whereas the absence of particulates reduces clogging problems at the nozzle for extrusion-based processes. Simultaneously, preceramic polymers and geopolymers have some limitations in terms of the range of ceramic compositions that can be obtained; sol-gel solutions are intrinsically unstable, whereas printed objects suffer from drying issues. Nevertheless, we successfully produced high-quality parts using a variety of additive manufacturing techniques, some of which (e.g., volumetric additive manufacturing) have been proposed for the fabrication of ceramic components for the first time.},

keywords = {Additive Manufacturing, Materials for the environment, Polymer-derived ceramics},

pubstate = {published},

tppubtype = {article}

}

@article{Mahmoud2022,

title = {Advanced Dye Sorbents from Combined Stereolithography 3D Printing and Alkali Activation of Pharmaceutical Glass Waste},

author = {M. Mahmoud and J. Kraxner and H. Elsayed and D. Galusek and E. Bernardo},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85139981975&doi=10.3390%2fma15196823&partnerID=40&md5=573421d9a025c5f4d953f2a4e96146dc},

doi = {10.3390/ma15196823},

year  = {2022},

date = {2022-01-01},

journal = {Materials},

volume = {15},

number = {19},

keywords = {Additive Manufacturing, Materials for the environment},

pubstate = {published},

tppubtype = {article}

}

@article{Ożóg20226192,

title = {Engineering of silicone-based blends for the masked stereolithography of biosilicate/carbon composite scaffolds},

author = {P. Ożóg and H. Elsayed and L. Grigolato and G. Savio and J. Kraxner and D. Galusek and E. Bernardo},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85133332789&doi=10.1016%2fj.jeurceramsoc.2022.06.057&partnerID=40&md5=b645ea375f1de942d4bb0f7048614c83},

doi = {10.1016/j.jeurceramsoc.2022.06.057},

year  = {2022},

date = {2022-01-01},

journal = {Journal of the European Ceramic Society},

volume = {42},

number = {13},

pages = {6192--6198},

keywords = {Additive Manufacturing, Biomaterials},

pubstate = {published},

tppubtype = {article}

}

@article{Lamnini2022,

title = {Robocasting of advanced ceramics: ink optimization and protocol to predict the printing parameters - A review},

author = {S. Lamnini and H. Elsayed and Y. Lakhdar and F. Baino and F. Smeacetto and E. Bernardo},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85138517841&doi=10.1016%2fj.heliyon.2022.e10651&partnerID=40&md5=76bae6ce7af2390f4a15a073ef96f109},

doi = {10.1016/j.heliyon.2022.e10651},

year  = {2022},

date = {2022-01-01},

journal = {Heliyon},

volume = {8},

number = {9},

keywords = {Additive Manufacturing},

pubstate = {published},

tppubtype = {article}

}

@article{Kraxner20229107,

title = {Additive manufacturing of Ca–Mg silicate scaffolds supported by flame-synthesized glass microspheres},

author = {J. Kraxner and H. Elsayed and A. Dasan and M. Hujová and M. Michálková and M. Michálek and E. Bernardo and D. Galusek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121245354&doi=10.1016%2fj.ceramint.2021.12.095&partnerID=40&md5=847d18da7d33dc81b622e02cf6de7063},

doi = {10.1016/j.ceramint.2021.12.095},

year  = {2022},

date = {2022-01-01},

journal = {Ceramics International},

volume = {48},

number = {7},

pages = {9107--9113},

keywords = {Additive Manufacturing},

pubstate = {published},

tppubtype = {article}

}