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Qazzazie-Hauser A, Honnef K, Hanemann T. Development of Inkjet Printable Formulations Based on Polyorganosilazane and Divinylbenzene. Polymers (Basel) 2023; 15:4512. [PMID: 38231922 PMCID: PMC10708460 DOI: 10.3390/polym15234512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/17/2023] [Accepted: 11/21/2023] [Indexed: 01/19/2024] Open
Abstract
Within this work, ink formulations based on polyorganosilazane (OPSZ) and divinylbenzene (DVB) were developed to be processed by inkjet printing. The formulations were studied regarding their rheological, structural, and thermal properties. The rheological results show that the new formulations meet the requirements of the inkjet printer by showing both low viscosity (below 20 mPa∙s at printing temperature) and Newtonian flow behavior even at high shear rates. Additionally, the inks have surface tensions in the range of 21 to 26 mN/m2. First, printing experiments of single layers were successfully conducted and show that the developed formulations can be processed by inkjet printing. The inks were crosslinked by UV light and then pyrolyzed at 1100 °C resulting in a ceramic yield between 75 and 42%, depending on the ink formulation. The crosslinking behavior was studied via FTIR spectroscopy, and the results reveal that crosslinking occurs mainly via free-radical polymerization of the vinyl group. Furthermore, the results indicate that silicon carbonitride (SiCN) was formed after the pyrolysis. The results of the electrical properties of the amorphous ceramics differ in dependence on the amount of DVB in the formulation. A maximum electrical conductivity of 1.2 S/cm-1 was observed for a UV-cured sample with a high amount of DVB pyrolyzed at 1100 °C. The generation in electrical conductivity is given by the formation of free carbon derived most likely by DVB.
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Affiliation(s)
- Afnan Qazzazie-Hauser
- Laboratory for Materials Processing, University of Freiburg, 79110 Freiburg, Germany;
| | - Kirsten Honnef
- Laboratory for Materials Processing, University of Freiburg, 79110 Freiburg, Germany;
| | - Thomas Hanemann
- Laboratory for Materials Processing, University of Freiburg, 79110 Freiburg, Germany;
- Institute for Applied Materials, Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
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Ackley BJ, Martin KL, Key TS, Clarkson CM, Bowen JJ, Posey ND, Ponder JF, Apostolov ZD, Cinibulk MK, Pruyn TL, Dickerson MB. Advances in the Synthesis of Preceramic Polymers for the Formation of Silicon-Based and Ultrahigh-Temperature Non-Oxide Ceramics. Chem Rev 2023; 123:4188-4236. [PMID: 37015056 DOI: 10.1021/acs.chemrev.2c00381] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2023]
Abstract
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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Affiliation(s)
- Brandon J Ackley
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
- ARCTOS Technology Solutions, 1270 N. Fairfield Road, Dayton, Ohio 45432, United States
| | - Kara L Martin
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
- UES, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432, United States
| | - Thomas S Key
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
- UES, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432, United States
| | - Caitlyn M Clarkson
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
- NRC Research Associateship Programs, The National Academies, Washington, District of Columbia 20001, United States
| | - John J Bowen
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
- UES, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432, United States
| | - Nicholas D Posey
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
- UES, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432, United States
| | - James F Ponder
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
- UES, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432, United States
| | - Zlatomir D Apostolov
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
| | - Michael K Cinibulk
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
| | - Timothy L Pruyn
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
| | - Matthew B Dickerson
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
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