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Meeting 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Symposium 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Presentation Title Room-Temperature Precipitation-Induced 3D Printing of PEEK with tunable porosity
Author(s) Harish Vishnu Gunjal, Gurminder Singh
On-Site Speaker (Planned) Harish Vishnu Gunjal
Abstract Scope Processing of high-performance polymers, such as polyether ether ketone (PEEK), remains a challenge in additive manufacturing owing to the high processing temperatures (> 350°C) and thermal degradation. This study presents a novel room-temperature precipitation-induced 3D printing (PI-3DP) approach for fabricating PEEK structures with tunable porosity. PEEK dissolved in 4-chlorophenol was extruded into a nonsolvent bath (water and isopropanol), inducing phase inversion and solidification. The process kinetics were studied through an in-situ phase inversion time study. The porosity and structural properties were systematically controlled by varying the polymer concentration and nonsolvent. The printed structures exhibited dual porosity, micro-to-nano pores via precipitation within the filament, and macro pores via 3D printing. Thermal (Tg = 145.9 ℃ and Tm = 337 ℃) and chemical analyses confirmed the retention of PEEK properties, indicating no degradation. Thus, PI-3DP provides an alternative technique for fabricating high-performance polymers such as PEEK with scalable and tunable properties.
Proceedings Inclusion? Undecided

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