Hierarchically porous ceramics via direct writing of preceramic polymer-triblock copolymer inks

Bowen, John J.; Mooraj, Shahryar; Goodman, Jacob A.; Peng, Siyuan; Street, Dayton P.; Román-Manso, Benito; Davidson, Emily C.; Martin, Kara L.; Rueschhoff, Lisa M.; Schiffres, Scott N.; Chen, Wen; Lewis, Jennifer A.; Dickerson, Matthew B.

doi:10.1016/j.mattod.2022.07.002

Cited by 32 publications

(17 citation statements)

References 69 publications

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“…Due to these low viscosities, the rheology of inks developed with these materials often needs to be modified. Some methods to alter the viscosity are low-temperature thermal treatment, − the addition of fillers like fibers or powders, , viscosifiers, and copolymers . Adding fibers or other fillers also has secondary benefits for the ink, including a reduction in the overall weight loss of printed components during pyrolysis (i.e., versus the weight loss from similar parts printed from neat PCP). , …”

Section: Processing Methodologies and Applications For Preceramic Pol...mentioning

confidence: 99%

“…One of the chief strengths of DIW is the ability to incorporate a variety of materials within inks. These additions make the creation of composite materials possible, such as nanowires or nanowhiskers (that can be aligned through shear), , ceramic powders, − , graphene or graphite, , or block copolymers . Although the listed examples are passive fillers, active fillers may be used to create foamed ceramic structures through direct foam writing.…”

Section: Processing Methodologies and Applications For Preceramic Pol...mentioning

confidence: 99%

“…Some methods to alter the viscosity are low-temperature thermal treatment, 380−382 the addition of fillers like fibers or powders, 405,406 viscosifiers, 407 and copolymers. 408 Adding fibers or other fillers also has secondary benefits for the ink, including a reduction in the overall weight loss of printed components during pyrolysis (i.e., versus the weight loss from similar parts printed from neat PCP). 409,410 DIW allows for multimaterial printing by control of ink reservoirs, pressure timing, and in-line mixing.…”

Section: Direct Inkmentioning

confidence: 99%

“…These additions make the creation of composite materials possible, such as nanowires or nanowhiskers (that can be aligned through shear), 415,416 ceramic powders, [417][418][419]402 graphene or graphite, 420,421 or block copolymers. 408 Although the listed examples are passive fillers, active fillers may be used to create foamed ceramic structures through direct foam writing. The decomposition of these molecules leads to ceramic structures with up to 83% porosity, which may be useful for insulating or energy absorption applications.…”

Section: Direct Inkmentioning

confidence: 99%

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Advances in the Synthesis of Preceramic Polymers for the Formation of Silicon-Based and Ultrahigh-Temperature Non-Oxide Ceramics

et al. 2023

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Preceramic polymers (PCPs) are a group of specialty macromolecules that serve as precursors for generating inorganics, including ceramic carbides, nitrides, and borides. PCPs represent interesting synthetic challenges for chemists due to the elements incorporated into their structure. This group of polymers is also of interest to engineers as PCPs enable the processing of polymer-derived ceramic products including high-performance ceramic fibers and composites. These finished ceramic materials are of growing significance for applications that experience extreme operating environments (e.g., aerospace propulsion and high-speed atmospheric flight). This Review provides an overview of advances in the synthesis and postpolymerization modification of macromolecules forming nonoxide ceramics. These PCPs include polycarbosilanes, polysilanes, polysilazanes, and precursors for ultrahigh-temperature ceramics. Following our review of PCP synthetic chemistry, we provide examples of the application and processing of these polymers, including their use in fiber spinning, composite fabrication, and additive manufacturing. The principal objective of this Review is to provide a resource that bridges the disciplines of synthetic chemistry and ceramic engineering while providing both insights and inspiration for future collaborative work that will ultimately drive the PCP field forward.

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Section: Processing Methodologies and Applications For Preceramic Pol...mentioning

confidence: 99%

Section: Processing Methodologies and Applications For Preceramic Pol...mentioning

confidence: 99%

Section: Direct Inkmentioning

confidence: 99%

Section: Direct Inkmentioning

confidence: 99%

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Advances in the Synthesis of Preceramic Polymers for the Formation of Silicon-Based and Ultrahigh-Temperature Non-Oxide Ceramics

et al. 2023

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“…Currently, the fabrication of porous ceramics with hierarchical porous structures typically requires multiple steps, such as introducing micro/mesostructures into a preformed macroporous skeleton structure. Accordingly, in addition to the preparation of the macroporous skeleton, several other processes are employed to introduce the hierarchically porous structure, including the growth of one-dimensional nanostructures [ 15 ], coating [ 16 ], etching [ 17 ], and the use of preceramic polymers [ 18 ], which undoubtedly increase the cost and complexity of the preparation process. Therefore, it is still highly desirable to develop porous ceramics with hierarchically porous structures in a simple manner.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of SiC Porous Ceramics by Foaming Method

et al. 2023

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In this work, hierarchically porous SiC ceramics were prepared via the foaming method. Porous ceramics with tunable, uniform, and bimodal pore structures were successfully fabricated in a facile way. The formation mechanisms of the 1st and 2nd modal macropores are the H2O2 foaming process and SiC particle overlap, respectively. The effect of pore-foaming agent amount, foaming temperature, and surfactant was investigated. According to the results, with increasing H2O2 amount, the porosity, pore size, and interconnectivity of the 1st modal pores increased, whereas bulk density and strength decreased. The porosity increased while the strength decreased as the foaming temperature increased. Surfactants increased pore interconnectivity and porosity. When the foaming temperature was 85 °C, and the addition of H2O2 was 5 wt.%, the porosity, bulk density, flexural strength, and compressive strength were 56.32%, 2.8301 g/cm3, 11.94 MPa, and 24.32 MPa, respectively. Moreover, SiC porous ceramics exhibited excellent corrosion resistance to acids and alkalis.

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Recent Advancements in Design Optimization of Lattice‐Structured Materials

et al. 2023

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Metamaterials, also known as lattice‐structured materials, imitate the multifunctionality of natural architects as tailoring their physical properties is associated with manipulating their microstructure. As the recent evolution of additive manufacturing enables the creation of intricate geometries with minimal material wastage, improving the design to manufacturing cycle of lattice structured materials has become one of the trending research areas. Triply periodic minimal surface (TPMS) and plate lattice materials are renowned for their exceptional mechanical behavior in lightweight applications. Apparently, several types of design optimization strategies are explored to maximize their performance for better biocompatibility and mechanical loading resistance. Some of these strategies include functional gradation and multimorphology hybridization that are comprehensively described in this review. Their benefits and drawbacks are highlighted with a focus on TPMS and plate lattice materials. The review anticipates the utilization of automated design exploration methods (i.e., topology optimization and data‐driven methods) to further enhance the design optimization procedure of lattice structured materials.

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Hierarchically porous ceramics via direct writing of preceramic polymer-triblock copolymer inks

Cited by 32 publications

References 69 publications

Advances in the Synthesis of Preceramic Polymers for the Formation of Silicon-Based and Ultrahigh-Temperature Non-Oxide Ceramics

Advances in the Synthesis of Preceramic Polymers for the Formation of Silicon-Based and Ultrahigh-Temperature Non-Oxide Ceramics

Fabrication of SiC Porous Ceramics by Foaming Method

Recent Advancements in Design Optimization of Lattice‐Structured Materials

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