Tailored modification of flow behavior and processability of polypropylene powders in SLS by fluidized bed coating with in-situ plasma produced silica nanoparticles

Gomez Bonilla JS, Trzenschiok H, Lanyi F, Schubert DW, Bück A, Schmidt J, Peukert W (2019)

Publication Language: English

Publication Status: Published

Publication Type: Conference contribution, Conference Contribution

Publication year: 2019

Publisher: The University of Texas at Austin

Pages Range: 1067-1075

Event location: Austin US

URI: https://www.scopus.com/record/display.uri?eid=2-s2.0-85095963751&origin=inward

Abstract

The processability of selective laser sintering (SLS) powders and the characteristics of the generated parts depend amongst others on the flowability. To increase the flowability, SLS powders are usually functionalized with flowing agents. Flowing agents are typically applied by dry particle coating. The optimization of the process parameters necessary to achieve a homogenous coating avoiding segregation is still empirical. In this contribution, an alternative process to particle dry coating is presented. This process integrates the synthesis of silica nanoparticles via plasma enhanced chemical vapor deposition (PECVD) and coating of polymer host particles in a fluidized bed in a single process. The influence of the treatment time on the packing density and flow behavior of the powders is investigated. Test specimen are produced to assess the influence of the treatment on the processability of the powders and the mechanical properties of the produced parts. © Solid Freeform Fabrication 2019: Proceedings of the 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019. All rights reserved.

Authors with CRIS profile

Juan Sebastian Gomez Bonilla Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Holger Trzenschiok Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Franz Lanyi Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) Dirk Schubert Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) Andreas Bück Professur für Partikeltechnik Jochen Schmidt Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Wolfgang Peukert Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik

How to cite

APA:

Gomez Bonilla, J.S., Trzenschiok, H., Lanyi, F., Schubert, D.W., Bück, A., Schmidt, J., & Peukert, W. (2019). Tailored modification of flow behavior and processability of polypropylene powders in SLS by fluidized bed coating with in-situ plasma produced silica nanoparticles. In The University of Texas in Austin (Eds.), Proceedings of the 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019 (pp. 1067-1075). Austin, US: The University of Texas at Austin.

MLA:

Gomez Bonilla, Juan Sebastian, et al. "Tailored modification of flow behavior and processability of polypropylene powders in SLS by fluidized bed coating with in-situ plasma produced silica nanoparticles." Proceedings of the 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019, Austin Ed. The University of Texas in Austin, The University of Texas at Austin, 2019. 1067-1075.

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